global_grid_lat[ /global_grid_lat= 0..59] (Type is Float64)

attributes
- long_name: global grid latitude (Type is String)
- standard_name: latitude (Type is String)
- units: degrees_north (Type is String)
- source: L3B ATM ATBD, Section 2.0, Section 5.0, Table 5. (Type is String)
- valid_min: -90.000000000000000 (Type is Float64)
- valid_max: 90.000000000000000 (Type is Float64)
- contentType: referenceInformation (Type is String)
- description: The global grid latitude one-dimensional array parameter, with the latitudes applicable to each global grid cell. ATL09 ATM histogram top latitude (latitude ()) derived from the ATM range window geolocation. Based on WGS84 Earth-centered, Earth-fixed terrestrial reference system and geodetic data. Direction: North=+ values. Range of latitude values: -90.0 to +90.0 degrees, with a step size of global_grid_lat_scale. Grid array organization: global_grid_lat (j), where j=latitude index, as per ATBD Section 2.0. Given weekly global_grid_lat_scale = 3.0 degrees, array dimension: global_grid_lat (60), type: double precision. Comprises the y-grid axis for global gridded parameters. Reference: global_grid_lat (1) = -90.0 degrees, at the lower left corner of a global gridded parameter cell location (i,j) = (1,1). (Type is String)
- coordinates: global_grid_lat (Type is String)
- origname: global_grid_lat (Type is String)
- fullnamepath: /global_grid_lat (Type is String)

global_grid_lon[ /global_grid_lon= 0..119] (Type is Float64)

attributes
- long_name: global grid longitude (Type is String)
- standard_name: longitude (Type is String)
- units: degrees_east (Type is String)
- source: L3B ATM ATBD, Section 2.0, Section 5.0, Table 5. (Type is String)
- valid_min: -180.00000000000000 (Type is Float64)
- valid_max: 180.00000000000000 (Type is Float64)
- contentType: referenceInformation (Type is String)
- description: The global grid longitude one-dimensional array parameter, with the longitudes applicable to each global grid cell. The ATL09 ATM histogram top longitude (longitude()) derived from the ATM range window geolocation. Based on WGS84 Earth-centered, Earth-fixed terrestrial reference system and geodetic data. Direction: East=+ values. Range of longitude values: -180.0 to +180.0 degrees, with a step size of global_grid_lon_scale. Grid array organization: global_grid_lon (i), where i=longitude index, as per ATBD Section 2.0. Given weekly global_grid_lon_scale = 3.0 degrees, array dimension: global_grid_lon (120), type: double precision. Comprises the x-grid axis for global gridded parameters. Reference: global_grid_lon (1) = -180.0 degrees, at the lower left corner of a global gridded parameter cell location (i,j) = (1,1). (Type is String)
- coordinates: global_grid_lon (Type is String)
- origname: global_grid_lon (Type is String)
- fullnamepath: /global_grid_lon (Type is String)

npolar_grid_lat[ /npolar_grid_lat= 0..29] (Type is Float64)

attributes
- long_name: north polar grid latitude (Type is String)
- standard_name: latitude (Type is String)
- units: degrees_north (Type is String)
- source: L3B ATM ATBD, Section 2.0, Section 5.0, Table 5. (Type is String)
- valid_min: 60.000000000000000 (Type is Float64)
- valid_max: 90.000000000000000 (Type is Float64)
- contentType: referenceInformation (Type is String)
- description: The north polar grid latitude one-dimensional array parameter, with the latitudes applicable to each north polar grid cell. ATL09 ATM histogram top latitude (latitude ()) derived from the ATM range window geolocation. Based on WGS84 Earth-centered, Earth-fixed terrestrial reference system and geodetic data. Direction: North=+ values. Range of latitude values: +90.0 down to +60.0 degrees, with a step size of polar_grid_lat_scale. Grid array organization: npolar_grid_lat (j), where j=latitude index, as per ATBD Section 2.0. Given weekly polar_grid_lat_scale = 1.0 degrees, the weekly array dimension is: npolar_grid_lat (30), type: double precision. Comprises the y-grid axis for north polar gridded parameters. Reference: npolar_grid_lat (1) = +90.0 degrees, at the upper left corner of a north polar gridded parameter cell location (i,j) = (1,1). (Type is String)
- coordinates: npolar_grid_lat (Type is String)
- origname: npolar_grid_lat (Type is String)
- fullnamepath: /npolar_grid_lat (Type is String)

npolar_grid_lon[ /npolar_grid_lon= 0..119] (Type is Float64)

attributes
- long_name: north polar grid longitude (Type is String)
- standard_name: longitude (Type is String)
- units: degrees_east (Type is String)
- source: L3B ATM ATBD, Section 2.0, Section 5.0, Table 5. (Type is String)
- valid_min: -180.00000000000000 (Type is Float64)
- valid_max: 180.00000000000000 (Type is Float64)
- contentType: referenceInformation (Type is String)
- description: The north polar grid longitude one-dimensional array parameter, with the longitudes applicable to each north polar grid cell. ATL09 ATM histogram top longitude (longitude ()) derived from the ATM range window geolocation. Based on WGS84 Earth-centered, Earth-fixed terrestrial reference system and geodetic data. Direction: East=+ values. Range of longitude values: -180.0 to +180.0 degrees, with a step size of polar_grid_lon_scale. Grid array organization: npolar_grid_lon (i), where i=longitude index, as per ATBD Section 2.0. Given weekly polar_grid_lon_scale = 3.0 degrees, the weekly array dimension is: npolar_grid_lon (120), type: double precision. Comprises the x-grid axis for north polar gridded parameters. Reference: npolar_grid_lon (1) = -180.0 degrees, at the upper left corner of a north polar gridded parameter cell location (i,j) = (1,1). (Type is String)
- coordinates: npolar_grid_lon (Type is String)
- origname: npolar_grid_lon (Type is String)
- fullnamepath: /npolar_grid_lon (Type is String)

orbit_info_crossing_time[ /orbit_info_crossing_time= 0..106] (Type is Float64)

attributes
- long_name: Ascending Node Crossing Time (Type is String)
- standard_name: time (Type is String)
- units: seconds since 2018-01-01 (Type is String)
- source: POD/PPD (Type is String)
- contentType: referenceInformation (Type is String)
- description: The time, in seconds since the ATLAS SDP GPS Epoch, at which the ascending node crosses the equator. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. Type: double precision. (Type is String)
- origname: crossing_time (Type is String)
- fullnamepath: /orbit_info/crossing_time (Type is String)

orbit_info_sc_orient_time[ /orbit_info_sc_orient_time= 0..0] (Type is Float64)

attributes
- long_name: Time of Last Spacecraft Orientation Change (Type is String)
- standard_name: time (Type is String)
- units: seconds since 2018-01-01 (Type is String)
- source: POD/PPD (Type is String)
- contentType: referenceInformation (Type is String)
- description: The time of the last spacecraft orientation change between forward, backward and transitional flight modes, expressed in seconds since the ATLAS SDP GPS Epoch. ICESat-2 is considered to be flying forward when the weak beams are leading the strong beams; and backward when the strong beams are leading the weak beams. ICESat-2 is considered to be in transition while it is maneuvering between the two orientations. Science quality is potentially degraded while in transition mode. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. Type: double precision. (Type is String)
- origname: sc_orient_time (Type is String)
- fullnamepath: /orbit_info/sc_orient_time (Type is String)

spolar_grid_lat[ /spolar_grid_lat= 0..29] (Type is Float64)

attributes
- long_name: south polar grid latitude (Type is String)
- standard_name: latitude (Type is String)
- units: degrees_north (Type is String)
- source: L3B ATM ATBD, Section 2.0, Section 5.0, Table 5. (Type is String)
- valid_min: -90.000000000000000 (Type is Float64)
- valid_max: -60.000000000000000 (Type is Float64)
- contentType: referenceInformation (Type is String)
- description: The south polar grid latitude one-dimensional array parameter, with the latitudes applicable to each south polar grid cell. ATL09 ATM histogram top latitude (latitude ()) derived from the ATM range window geolocation. Based on WGS84 Earth-centered, Earth-fixed terrestrial reference system and geodetic data. Direction: South=- values. Range of latitude values: -90.0 up to -60.0 degrees, with a step size of polar_grid_lat_scale. Grid array organization: spolar_grid_lat (j), where j=latitude index, as per ATBD Section 2.0. Given weekly polar_grid_lat_scale = 1.0 degrees, the weekly array dimension is: spolar_grid_lat (30), type: double precision. Comprises the y-grid axis for south polar gridded parameters. Reference: spolar_grid_lat (1) = -90.0 degrees, at the lower left corner of a south polar gridded parameter cell location (i,j) = (1,1). (Type is String)
- coordinates: spolar_grid_lat (Type is String)
- origname: spolar_grid_lat (Type is String)
- fullnamepath: /spolar_grid_lat (Type is String)

spolar_grid_lon[ /spolar_grid_lon= 0..119] (Type is Float64)

attributes
- long_name: south polar grid longitude (Type is String)
- standard_name: longitude (Type is String)
- units: degrees_east (Type is String)
- source: L3B ATM ATBD, Section 2.0, Section 5.0, Table 5. (Type is String)
- valid_min: -180.00000000000000 (Type is Float64)
- valid_max: 180.00000000000000 (Type is Float64)
- contentType: referenceInformation (Type is String)
- description: The south polar grid longitude one-dimensional array parameter, with the longitudes applicable to each south polar grid cell. ATL09 ATM histogram top longitude (longitude ()) derived from the ATM range window geolocation. Based on WGS84 Earth-centered, Earth-fixed terrestrial reference system and geodetic data. Direction: East=+ values. Range of longitude values: -180.0 to +180.0 degrees, with a step size of polar_grid_lon_scale. Grid array organization: spolar_grid_lon (i), where i=longitude index, as per ATBD Section 2.0. Given weekly polar_grid_lon_scale = 3.0 degrees, the weekly array dimension is: spolar_grid_lon (120), type: double precision. Comprises the x-grid axis for south polar gridded parameters. Reference: spolar_grid_lon (1) = -180.0 degrees, at the lower left corner of a south polar gridded parameter cell location (i,j) = (1,1). (Type is String)
- coordinates: spolar_grid_lon (Type is String)
- origname: spolar_grid_lon (Type is String)
- fullnamepath: /spolar_grid_lon (Type is String)

FakeDim0[ /FakeDim0= 0..0] (Type is Int32)

attributes
- units: level (Type is String)

FakeDim1[ /FakeDim1= 0..723] (Type is Int32)

attributes
- units: level (Type is String)

FakeDim2[ /FakeDim2= 0..1026] (Type is Int32)

attributes
- units: level (Type is String)

FakeDim3[ /FakeDim3= 0..2] (Type is Int32)

attributes
- units: level (Type is String)

FakeDim4[ /FakeDim4= 0..637] (Type is Int32)

attributes
- units: level (Type is String)

FakeDim5[ /FakeDim5= 0..561] (Type is Int32)

attributes
- units: level (Type is String)

delta_time_end[ /FakeDim0= 0..0] (Type is Float64)

attributes
- long_name: end time (Type is String)
- standard_name: time (Type is String)
- units: seconds since 2018-01-01 (Type is String)
- source: L3B ATM ATBD, Section 5.0, Table 5. (Type is String)
- contentType: auxiliaryInformation (Type is String)
- description: The end time scalar parameter (end_time). The end time/date of the data used to make the product. Number of GPS seconds since the ATLAS SDP epoch at the end of the data collection. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. Type: double precision. (Type is String)
- origname: delta_time_end (Type is String)
- fullnamepath: /delta_time_end (Type is String)

npolar_grnd_detect[ /npolar_grid_lat= 0..29] [ /npolar_grid_lon= 0..119] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- long_name: North Polar Ground Detection Frequency (fraction) (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.6, Section 5.0, Table 5. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: modelResult (Type is String)
- description: The north polar ground detection frequency two-dimensional atmospheric gridded parameter. For each north polar grid cell this represents the number of detected surface signal 25 Hz (high-rate profile) observations (surface_sig () > 0.0) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded north polar ground detection values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The calculation results in a fractional value. The ATL09 required detected surface signal (surface_sig ()) is determined from the surface signal count of the number of photons in the detected surface bin in the L3A ATM high-rate profile processing. Grid array organization: npolar_grnd_detect (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the weekly gridded array dimension is: npolar_grnd_detect (120,30), type: floating point. Reference: npolar_grnd_detect (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "npolar_grnd_detect_img" in the ATL16 product. The applicable north polar observation counts for this atmosphere gridded parameter are available from: npolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- coordinates: npolar_grid_lon npolar_grid_lat (Type is String)
- origname: npolar_grnd_detect (Type is String)
- fullnamepath: /npolar_grnd_detect (Type is String)

orbit_info_cycle_number[ /orbit_info_crossing_time= 0..106] (Type is Int8)

attributes
- long_name: Cycle Number (Type is String)
- units: 1 (Type is String)
- valid_min: 0 (Type is Int8)
- valid_max: 50 (Type is Int8)
- contentType: referenceInformation (Type is String)
- description: A count of the number of exact repeats of this reference orbit. Type: integer*1. (Type is String)
- source: Operations (Type is String)
- origname: cycle_number (Type is String)
- fullnamepath: /orbit_info/cycle_number (Type is String)
- coordinates: orbit_info_crossing_time (Type is String)

orbit_info_orbit_number[ /orbit_info_crossing_time= 0..106] (Type is UInt16)

attributes
- long_name: Orbit Number (Type is String)
- units: 1 (Type is String)
- source: Operations (Type is String)
- valid_min: 1 (Type is UInt16)
- valid_max: 65000 (Type is UInt16)
- contentType: referenceInformation (Type is String)
- description: Unique identifying number for each planned ICESat-2 orbit. (Type is String)
- origname: orbit_number (Type is String)
- fullnamepath: /orbit_info/orbit_number (Type is String)
- coordinates: orbit_info_crossing_time (Type is String)

orbit_info_lan[ /orbit_info_crossing_time= 0..106] (Type is Float64)

attributes
- long_name: Ascending Node Longitude (Type is String)
- units: degrees_east (Type is String)
- source: POD/PPD (Type is String)
- valid_min: -180.00000000000000 (Type is Float64)
- valid_max: 180.00000000000000 (Type is Float64)
- contentType: referenceInformation (Type is String)
- description: Longitude at the ascending node crossing. Type: double precision. (Type is String)
- origname: lan (Type is String)
- fullnamepath: /orbit_info/lan (Type is String)
- coordinates: orbit_info_crossing_time (Type is String)

orbit_info_sc_orient[ /orbit_info_sc_orient_time= 0..0] (Type is Int8)

attributes
- long_name: Spacecraft Orientation (Type is String)
- units: 1 (Type is String)
- source: POD/PPD (Type is String)
- valid_min: 0 (Type is Int8)
- valid_max: 2 (Type is Int8)
- contentType: referenceInformation (Type is String)
- description: This parameter tracks the spacecraft orientation between forward, backward and transitional flight modes. ICESat-2 is considered to be flying forward when the weak beams are leading the strong beams; and backward when the strong beams are leading the weak beams. ICESat-2 is considered to be in transition while it is maneuvering between the two orientations. Science quality is potentially degraded while in transition mode. Type: integer*1. (Type is String)
- flag_meanings: backward forward transition (Type is String)
- flag_values: 0, 1, 2 (Type is Int8)
- origname: sc_orient (Type is String)
- fullnamepath: /orbit_info/sc_orient (Type is String)
- coordinates: orbit_info_sc_orient_time (Type is String)

orbit_info_rgt[ /orbit_info_crossing_time= 0..106] (Type is Int16)

attributes
- long_name: Reference Ground track (Type is String)
- units: 1 (Type is String)
- source: POD/PPD (Type is String)
- valid_min: 1 (Type is Int16)
- valid_max: 1387 (Type is Int16)
- contentType: referenceInformation (Type is String)
- description: The reference ground track (RGT) is the track on the earth at which a specified unit vector within the observatory is pointed. Under nominal operating conditions, there will be no data collected along the RGT, as the RGT is spanned by GT3 and GT4. During slews or off-pointing, it is possible that ground tracks may intersect the RGT. The ICESat-2 mission has 1387 RGTs. Type: integer*2. (Type is String)
- origname: rgt (Type is String)
- fullnamepath: /orbit_info/rgt (Type is String)
- coordinates: orbit_info_crossing_time (Type is String)

global_grnd_detect_img[ /FakeDim1= 0..723] [ /FakeDim2= 0..1026] [ /FakeDim3= 0..2] (Type is Byte)

attributes
- CLASS: IMAGE (Type is String)
- IMAGE_VERSION: 1.2 (Type is String)
- IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String)
- INTERLACE_MODE: INTERLACE_PIXEL (Type is String)
- origname: global_grnd_detect_img (Type is String)
- fullnamepath: /global_grnd_detect_img (Type is String)

spolar_grnd_detect[ /spolar_grid_lat= 0..29] [ /spolar_grid_lon= 0..119] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- long_name: South Polar Ground Detection Frequency (fraction) (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.6, Section 5.0, Table 5. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: modelResult (Type is String)
- description: The south polar ground detection frequency two-dimensional atmospheric gridded parameter. For each south polar grid cell this represents the number of detected surface signal 25 Hz (high-rate profile) observations (surface_sig () > 0.0) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded south polar ground detection values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The calculation results in a fractional value. The ATL09 required detected surface signal (surface_sig ()) is determined from the surface signal count of the number of photons in the detected surface bin in the L3A ATM high-rate profile processing. Grid array organization: spolar_grnd_detect (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the weekly gridded array dimension is: spolar_grnd_detect (120,30), type: floating point. Reference: spolar_grnd_detect (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "spolar_grnd_detect_img" in the ATL16 product. The applicable south polar observation counts for this atmosphere gridded parameter are available from: spolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- coordinates: spolar_grid_lon spolar_grid_lat (Type is String)
- origname: spolar_grnd_detect (Type is String)
- fullnamepath: /spolar_grnd_detect (Type is String)

spolar_lowcloud_frac_img[ /FakeDim4= 0..637] [ /FakeDim5= 0..561] [ /FakeDim3= 0..2] (Type is Byte)

attributes
- CLASS: IMAGE (Type is String)
- IMAGE_VERSION: 1.2 (Type is String)
- IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String)
- INTERLACE_MODE: INTERLACE_PIXEL (Type is String)
- origname: spolar_lowcloud_frac_img (Type is String)
- fullnamepath: /spolar_lowcloud_frac_img (Type is String)

npolar_highcloud_frac_img[ /FakeDim4= 0..637] [ /FakeDim5= 0..561] [ /FakeDim3= 0..2] (Type is Byte)

attributes
- CLASS: IMAGE (Type is String)
- IMAGE_VERSION: 1.2 (Type is String)
- IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String)
- INTERLACE_MODE: INTERLACE_PIXEL (Type is String)
- origname: npolar_highcloud_frac_img (Type is String)
- fullnamepath: /npolar_highcloud_frac_img (Type is String)

npolar_hirate_blowing_snow_freq_img[ /FakeDim4= 0..637] [ /FakeDim5= 0..561] [ /FakeDim3= 0..2] (Type is Byte)

attributes
- CLASS: IMAGE (Type is String)
- IMAGE_VERSION: 1.2 (Type is String)
- IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String)
- INTERLACE_MODE: INTERLACE_PIXEL (Type is String)
- origname: npolar_hirate_blowing_snow_freq_img (Type is String)
- fullnamepath: /npolar_hirate_blowing_snow_freq_img (Type is String)

spolar_hirate_blowing_snow_freq_img[ /FakeDim4= 0..637] [ /FakeDim5= 0..561] [ /FakeDim3= 0..2] (Type is Byte)

attributes
- CLASS: IMAGE (Type is String)
- IMAGE_VERSION: 1.2 (Type is String)
- IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String)
- INTERLACE_MODE: INTERLACE_PIXEL (Type is String)
- origname: spolar_hirate_blowing_snow_freq_img (Type is String)
- fullnamepath: /spolar_hirate_blowing_snow_freq_img (Type is String)

npolar_grnd_detect_img[ /FakeDim4= 0..637] [ /FakeDim5= 0..561] [ /FakeDim3= 0..2] (Type is Byte)

attributes
- CLASS: IMAGE (Type is String)
- IMAGE_VERSION: 1.2 (Type is String)
- IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String)
- INTERLACE_MODE: INTERLACE_PIXEL (Type is String)
- origname: npolar_grnd_detect_img (Type is String)
- fullnamepath: /npolar_grnd_detect_img (Type is String)

npolar_lowcloud_frac[ /npolar_grid_lat= 0..29] [ /npolar_grid_lon= 0..119] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- long_name: North Polar Low Cloud Fraction (<= 4km) (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.3.1, Section 5.0, Table 5. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: modelResult (Type is String)
- description: The north polar low (<= 4km) cloud fraction two-dimensional atmospheric gridded parameter. For each north polar grid cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1 within cloud_flag_atm () layers) that occurs below and up to and including 4 km from the layer top (layer_top (,) <= 4.0 within cloud_flag_atm () layers) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded north polar low cloud fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALD. The ATL09 required number of layers (cloud_flag_atm ()), the layer attribute flag (layer_attr (,)), and the height of the detected layers (layer_top (,)) are determined from the backscatter profile using the DDA layer finder in the L3A ATM high-rate profile processing. Grid array organization: npolar_lowcloud_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the weekly gridded array dimension is: npolar_lowcloud_frac (120,30), type: floating point. Reference: npolar_lowcloud_frac (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "npolar_lowcloud_frac_img" in the ATL16 product. The applicable north polar observation counts for this atmosphere gridded parameter are available from: npolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- coordinates: npolar_grid_lon npolar_grid_lat (Type is String)
- origname: npolar_lowcloud_frac (Type is String)
- fullnamepath: /npolar_lowcloud_frac (Type is String)

global_asr_img[ /FakeDim1= 0..723] [ /FakeDim2= 0..1026] [ /FakeDim3= 0..2] (Type is Byte)

attributes
- CLASS: IMAGE (Type is String)
- IMAGE_VERSION: 1.2 (Type is String)
- IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String)
- INTERLACE_MODE: INTERLACE_PIXEL (Type is String)
- origname: global_asr_img (Type is String)
- fullnamepath: /global_asr_img (Type is String)

npolar_lorate_bsnow_obs_grid[ /npolar_grid_lat= 0..29] [ /npolar_grid_lon= 0..119] (Type is Float32)

attributes
- long_name: north polar low-rate blowing snow frequency observation grid (Type is String)
- units: 1 (Type is String)
- source: L3B ATM ATBD, Section 3.9, Table 4., Section 5.0, Table 5. (Type is String)
- contentType: modelResult (Type is String)
- description: The north polar low-rate blowing snow observation count two-dimensional gridded parameter. The number of low-rate profile blowing snow observations used in the computation of low-rate blowing snow frequency for the Arctic. For each north polar grid cell this represents the number of valid blowing snow confidence 1 Hz (low-rate profile) observations (bsnow_con () .ne. INVALID), where the low-rate profile blowing snow confidence value exceeds the surface not detected value (bsnow_con () > -3, and is actually implemented as bsnow_con () => -2). Only valid detected blowing snow layer top height 1 Hz (low-rate profile) observations (bsnow_h () .ne. INVALID and bsnow_h () > 0.0) and only valid blowing snow confidence 1 Hz (low-rate profile) observations (bsnow_con () .ne. INVALID), where the low-rate blowing snow confidence value exceeds the surface not detected value (bsnow_con () > -3, and is implemented as bsnow_con () => -2) in each grid cell are used to compute the cell north polar low-rate blowing snow frequency (npolar_lorate_blowing_snow_freq (i,j)). Grid array organization: npolar_lorate_bsnow_obs_grid (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the weekly gridded array dimension is: npolar_lorate_bsnow_obs_grid (120,30), type: floating point. Reference: npolar_lorate_bsnow_obs_grid (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. The north polar observation counts are applicable to the atmosphere gridded parameter: npolar_lorate_blowing_snow_freq (i,j). (Type is String)
- coordinates: npolar_grid_lon npolar_grid_lat (Type is String)
- origname: npolar_lorate_bsnow_obs_grid (Type is String)
- fullnamepath: /npolar_lorate_bsnow_obs_grid (Type is String)

spolar_lowcloud_frac[ /spolar_grid_lat= 0..29] [ /spolar_grid_lon= 0..119] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- long_name: South Polar Low Cloud Fraction (<= 4km) (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.3.1, Section 5.0, Table 5. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: modelResult (Type is String)
- description: The south polar low (<= 4km) cloud fraction two-dimensional atmospheric gridded parameter. For each south polar grid cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1 within cloud_flag_atm () layers) that occurs below and up to and including 4 km from the layer top (layer_top(,) <= 4.0 within cloud_flag_atm () layers) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded south polar low cloud fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The ATL09 required number of layers (cloud_flag_atm ()), the layer attribute flag (layer_attr (,)), and the height of the detected layers (layer_top (,)) are determined from the backscatter profile using the DDA layer finder in the L3A ATM high-rate profile processing. Grid array organization: spolar_lowcloud_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the weekly gridded array dimension is: spolar_lowcloud_frac (120,30), type: floating point. Reference: spolar_lowcloud_frac (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "spolar_lowcloud_frac_img" in the ATL16 product. The applicable south polar observation counts for this atmosphere gridded parameter are available from: spolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- coordinates: spolar_grid_lon spolar_grid_lat (Type is String)
- origname: spolar_lowcloud_frac (Type is String)
- fullnamepath: /spolar_lowcloud_frac (Type is String)

global_column_od[ /global_grid_lat= 0..59] [ /global_grid_lon= 0..119] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- long_name: Global (Over Water) Total Column Optical Depth (0-1.5) (Type is String)
- units: 1 (Type is String)
- source: L3B ATM ATBD, Section 3.2, Section 5.0, Table 5. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.500000000 (Type is Float32)
- contentType: modelResult (Type is String)
- description: The global (over water) average total column optical depth two-dimensional atmospheric gridded parameter. For each global grid cell this represents the ratio of the summation of the valid over-water (column_od_asr_qf () = 4 for water) column optical depth 25 Hz (high-rate profile) observations (column_od_asr () .ne. INVALID) to the number of valid over-water column optical depth 25 Hz (high-rate profile) observations (tcod_obs_grid (i,j)) in that cell. The average over-water global total column optical depth values are produced when the number of valid over-water column optical depth 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (tcod_obs_grid (i,j) => obs_minimum); otherwise set to INVALID. The ATL09 required total column optical depth (column_od_asr ()) is estimated from the apparent surface reflectance (ASR) and the assumed actual surface reflectance. The required total column optical depth from ASR quality flag (column_od_asr_qf ()) supplies the reflecting surface type for over-water surface determination. Both ATL09 parameters are supplied from the L3A ATM high-rate profile processing. The 0.0 to 1.5 value range constraint is applied to the global image, and is not applied to the gridded parameter values. Grid array organization: global_column_od (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given weekly global_grid_lon_scale = 3.0 degrees and global_grid_lat_scale = 3.0 degrees, gridded array dimension: global_column_od (120,60), type: floating point. Reference: global_column_od (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the global projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "global_column_od_img" in the ATL16 product. The applicable global observation counts for this atmosphere gridded parameter are available from: tcod_obs_grid (i,j). Expected value range: minimum: 0.0, maximum: 1.5. Maximum value may exceed 1.5 (e.g., 2.57788515). Image will be limited to the range of 0.0 to 1.5. (Type is String)
- coordinates: global_grid_lon global_grid_lat (Type is String)
- origname: global_column_od (Type is String)
- fullnamepath: /global_column_od (Type is String)

data_qa_flag[ /FakeDim0= 0..0] (Type is Int8)

attributes
- long_name: data quality flag (Type is String)
- units: auxiliaryInformation (Type is String)
- source: L3B ATM ATBD, Section 5.0, Table 5. (Type is String)
- contentType: qualityInformation (Type is String)
- description: The data quality flag scalar parameter. This is a TBD flag that may be used to indicate data quality. Type: integer*1. (Type is String)
- origname: data_qa_flag (Type is String)
- fullnamepath: /data_qa_flag (Type is String)

npolar_highcloud_frac[ /npolar_grid_lat= 0..29] [ /npolar_grid_lon= 0..119] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- long_name: North Polar High Cloud Fraction (> 8km) (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.3.1, Section 5.0, Table 5. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: modelResult (Type is String)
- description: The north polar high (> 8km) cloud fraction two-dimensional atmospheric gridded parameter. For each north polar grid cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1 within cloud_flag_atm () layers) that occurs above 8 km from the layer top (layer_top(,) > 8.0 within cloud_flag_atm () layers) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded north polar high cloud fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The ATL09 required number of layers (cloud_flag_atm ()), the layer attribute flag (layer_attr (,)), and the height of the detected layers (layer_top (,)) are determined from the backscatter profile using the DDA layer finder in the L3A ATM high-rate profile processing. Grid array organization: npolar_highcloud_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the weekly gridded array dimension is: npolar_highcloud_frac (120,30), type: floating point. Reference: npolar_highcloud_frac (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "npolar_highcloud_frac_img" in the ATL16 product. The applicable north polar observation counts for this atmosphere gridded parameter are available from: npolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- coordinates: npolar_grid_lon npolar_grid_lat (Type is String)
- origname: npolar_highcloud_frac (Type is String)
- fullnamepath: /npolar_highcloud_frac (Type is String)

spolar_grnd_detect_img[ /FakeDim4= 0..637] [ /FakeDim5= 0..561] [ /FakeDim3= 0..2] (Type is Byte)

attributes
- CLASS: IMAGE (Type is String)
- IMAGE_VERSION: 1.2 (Type is String)
- IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String)
- INTERLACE_MODE: INTERLACE_PIXEL (Type is String)
- origname: spolar_grnd_detect_img (Type is String)
- fullnamepath: /spolar_grnd_detect_img (Type is String)

tcod_obs_grid[ /global_grid_lat= 0..59] [ /global_grid_lon= 0..119] (Type is Float32)

attributes
- long_name: global total column optical depth (over water) observation grid (Type is String)
- units: 1 (Type is String)
- source: L3B ATM ATBD Section 3.9, Table 4., Section 5.0, Table 5. (Type is String)
- contentType: modelResult (Type is String)
- description: The global total column optical depth (over water) observation count two-dimensional gridded parameter. The number of observations used to compute the average global total column optical depth over water. Only valid surface return over-water (column_od_asr_qf () = 4 for water) column optical depth (column_od_asr () .ne. INVALID and column_od_asr () > 0.0) 25 Hz (high-rate profile) observations in each grid cell are used to compute the cell average over-water total column optical depth (global_column_od (i,j)). Grid array organization: tcod_obs_grid (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly global_grid_lon_scale = 3.0 degrees and the global_grid_lat_scale = 3.0 degrees, the weekly global gridded array dimension is: tcod_obs_grid (120,60), type: floating point. Reference: tcod_obs_grid (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the global projection array. The global observation counts are applicable to the atmosphere gridded parameter: global_column_od (i,j). (Type is String)
- coordinates: global_grid_lon global_grid_lat (Type is String)
- origname: tcod_obs_grid (Type is String)
- fullnamepath: /tcod_obs_grid (Type is String)

spolar_totalcloud_frac[ /spolar_grid_lat= 0..29] [ /spolar_grid_lon= 0..119] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- long_name: South Polar Total Cloud Fraction (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.3.1, Section 5.0, Table 5. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: modelResult (Type is String)
- description: The south polar total cloud fraction two-dimensional atmospheric gridded parameter. For each south polar grid cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1 within cloud_flag_atm () layers) to the number of all 25 Hz (high-rate profile) observations (spolar_cloud_obs_grid (i,j)) in the cell. The gridded south polar total cloud fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (spolar_cloud_obs_grid (i,j) => obs_minimum); otherwise set to INVALID. The ATL09 required number of layers (cloud_flag_atm ()) and the layer attribute flag (layer_attr (,)) are determined from the backscatter profile using the DDA layer finder in the L3A ATM high-rate profile processing. Grid array organization: spolar_totalcloud_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the weekly gridded array dimension is: spolar_totalcloud_frac (120,30), type: floating point. Reference: spolar_totalcloud_frac (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "spolar_totalcloud_frac_img" in the ATL16 product. The applicable south polar observation counts for this atmosphere gridded parameter are available from: spolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- coordinates: spolar_grid_lon spolar_grid_lat (Type is String)
- origname: spolar_totalcloud_frac (Type is String)
- fullnamepath: /spolar_totalcloud_frac (Type is String)

npolar_transcloud_frac[ /npolar_grid_lat= 0..29] [ /npolar_grid_lon= 0..119] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- long_name: North Polar Transmissive Cloud Fraction (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.3.2, Section 5.0, Table 5. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: modelResult (Type is String)
- description: The north polar transmissive cloud fraction two-dimensional atmospheric gridded parameter. For each north polar cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1 within cloud_flag_atm () layers) with surface signal detection (surface_sig () > 0.0) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded north polar transmissive cloud fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The fraction of transmissive clouds covering the entire grid cell. Transmissive clouds are clouds that permit or allow transmission of downward radiation through the cloud. The ATL09 required number of layers (cloud_flag_atm ()) and the layer attribute flag (layer_attr (,)) are determined from the backscatter profile using the DDA layer finder, and the required detected surface signal (surface_sig ()) is determined from the surface signal count of the number of photons in the detected surface bin, all in the L3A ATM high-rate profile processing. Grid array organization: npolar_transcloud_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the weekly gridded array dimension is: npolar_transcloud_frac (120,30), type: floating point. Reference: npolar_transcloud_frac (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "npolar_transcloud_frac_img" in the ATL16 product. The applicable north polar observation counts for this atmosphere gridded parameter are available from: npolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- coordinates: npolar_grid_lon npolar_grid_lat (Type is String)
- origname: npolar_transcloud_frac (Type is String)
- fullnamepath: /npolar_transcloud_frac (Type is String)

npolar_cloud_obs_grid[ /npolar_grid_lat= 0..29] [ /npolar_grid_lon= 0..119] (Type is Float32)

attributes
- long_name: north polar cloud observation grid (Type is String)
- units: 1 (Type is String)
- source: L3B ATM ATBD, Section 3.9, Table 4., Section 5.0, Table 5. (Type is String)
- contentType: modelResult (Type is String)
- description: The north polar total cloud fraction observation count two-dimensional gridded parameter. The number of observations used to compute the north polar total cloud fraction. This number represents all 25 Hz (high-rate profile) observations in each cell. Only 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1) in each grid cell are used to compute the cell north polar total cloud fraction (npolar_totlcloud_frac (i,j)). Grid array organization: npolar_cloud_obs_grid (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the weekly gridded array dimension is: npolar_cloud_obs_grid (120,30), type: floating point. Reference: npolar_cloud_obs_grid (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. The north polar observation counts are applicable to these atmosphere gridded parameters: npolar_lowcloud_frac (i,j), npolar_midcloud_frac (i,j), npolar_highcloud_frac (i,j), npolar_totalcloud_frac (i,j), npolar_transcloud_frac (i,j), npolar_opaquecloud_frac (i,j), and npolar_grnd_detect (i,j). (Type is String)
- coordinates: npolar_grid_lon npolar_grid_lat (Type is String)
- origname: npolar_cloud_obs_grid (Type is String)
- fullnamepath: /npolar_cloud_obs_grid (Type is String)

npolar_hirate_bsnow_obs_grid[ /npolar_grid_lat= 0..29] [ /npolar_grid_lon= 0..119] (Type is Float32)

attributes
- long_name: north polar high-rate blowing snow frequency observation grid (Type is String)
- units: 1 (Type is String)
- source: L3B ATM ATBD, Section 3.9, Table 4., Section 5.0, Table 5. (Type is String)
- contentType: modelResult (Type is String)
- description: The north polar high-rate blowing snow observation count two-dimensional gridded parameter. The number of high-rate profile blowing snow observations used in the computation of high-rate blowing snow frequency for the Arctic. For each north polar grid cell this represents the number of valid blowing snow confidence 25 Hz (high-rate profile) observations (bsnow_con () .ne. INVALID), where the high-rate profile blowing snow confidence value exceeds the surface not detected value (bsnow_con () > -3, and is actually implemented as bsnow_con () => -2). Only valid detected blowing snow layer top height 25 Hz (high-rate profile) observations (bsnow_h () .ne. INVALID and bsnow_h () > 0.0) and only valid blowing snow confidence 25 Hz (high-rate profile) observations (bsnow_con () .ne. INVALID), where the high-rate blowing snow confidence value exceeds the surface not detected value (bsnow_con () > -3, and is implemented as bsnow_con () => -2) in each grid cell are used to compute the cell north polar high-rate blowing snow frequency (npolar_hirate_blowing_snow_freq (i,j)). Grid array organization: npolar_hirate_bsnow_obs_grid (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the weekly gridded array dimension is: npolar_hirate_bsnow_obs_grid (120,30), type: floating point. Reference: npolar_hirate_bsnow_obs_grid (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. The north polar observation counts are applicable to the atmosphere gridded parameter: npolar_hirate_blowing_snow_freq (i,j). (Type is String)
- coordinates: npolar_grid_lon npolar_grid_lat (Type is String)
- origname: npolar_hirate_bsnow_obs_grid (Type is String)
- fullnamepath: /npolar_hirate_bsnow_obs_grid (Type is String)

spolar_asr_obs_grid[ /spolar_grid_lat= 0..29] [ /spolar_grid_lon= 0..119] (Type is Float32)

attributes
- long_name: south polar apparent surface reflectance observation grid (Type is String)
- units: 1 (Type is String)
- source: L3B ATM ATBD, Section 3.9, Table 4., Section 5.0, Table 5. (Type is String)
- contentType: modelResult (Type is String)
- description: The south polar apparent surface reflectance (ASR) observation count two-dimensional gridded parameter. The number of observations used to compute the average south polar apparent surface reflectance (ASR). Only surface signal detected ASR 25 Hz (high-rate profile) observations (apparent_surf_reflec () > 0.0) in each grid cell are used to compute the cell south polar ASR (spolar_asr (i,j)). Grid array organization: spolar_asr_obs_grid (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the weekly gridded array dimension is: spolar_asr_obs_grid (120,30), type: floating point. Reference: spolar_asr_obs_grid (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. The south polar observation counts are applicable to to the atmosphere gridded parameter: spolar_asr (i,j). (Type is String)
- coordinates: spolar_grid_lon spolar_grid_lat (Type is String)
- origname: spolar_asr_obs_grid (Type is String)
- fullnamepath: /spolar_asr_obs_grid (Type is String)

global_asr_obs_grid[ /global_grid_lat= 0..59] [ /global_grid_lon= 0..119] (Type is Float32)

attributes
- long_name: global apparent surface reflectance observation grid (Type is String)
- units: 1 (Type is String)
- source: L3B ATM ATBD, Section 3.9, Table 4., Section 5.0, Table 5. (Type is String)
- contentType: modelResult (Type is String)
- description: The global apparent surface reflectance (ASR) observation count two-dimensional gridded parameter. The number of observations used to compute the average global apparent surface reflectance (ASR). Only surface signal detected ASR 25 Hz (high-rate profile) observations (apparent_surf_reflec () > 0.0) in each grid cell are used to compute the cell global ASR (global_asr (i,j)). Grid array organization: global_asr_obs_grid (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly global_grid_lon_scale = 3.0 degrees and the global_grid_lat_scale = 3.0 degrees, the weekly global gridded array dimension is: global_asr_obs_grid (120,60), type: floating point . Reference: global_asr_obs_grid (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the global projection array. The global observation counts are applicable to the atmosphere gridded parameter: global_asr (i,j). (Type is String)
- coordinates: global_grid_lon global_grid_lat (Type is String)
- origname: global_asr_obs_grid (Type is String)
- fullnamepath: /global_asr_obs_grid (Type is String)

spolar_opaquecloud_frac_img[ /FakeDim4= 0..637] [ /FakeDim5= 0..561] [ /FakeDim3= 0..2] (Type is Byte)

attributes
- CLASS: IMAGE (Type is String)
- IMAGE_VERSION: 1.2 (Type is String)
- IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String)
- INTERLACE_MODE: INTERLACE_PIXEL (Type is String)
- origname: spolar_opaquecloud_frac_img (Type is String)
- fullnamepath: /spolar_opaquecloud_frac_img (Type is String)

npolar_lorate_blowing_snow_freq_img[ /FakeDim4= 0..637] [ /FakeDim5= 0..561] [ /FakeDim3= 0..2] (Type is Byte)

attributes
- CLASS: IMAGE (Type is String)
- IMAGE_VERSION: 1.2 (Type is String)
- IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String)
- INTERLACE_MODE: INTERLACE_PIXEL (Type is String)
- origname: npolar_lorate_blowing_snow_freq_img (Type is String)
- fullnamepath: /npolar_lorate_blowing_snow_freq_img (Type is String)

spolar_lorate_blowing_snow_freq_img[ /FakeDim4= 0..637] [ /FakeDim5= 0..561] [ /FakeDim3= 0..2] (Type is Byte)

attributes
- CLASS: IMAGE (Type is String)
- IMAGE_VERSION: 1.2 (Type is String)
- IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String)
- INTERLACE_MODE: INTERLACE_PIXEL (Type is String)
- origname: spolar_lorate_blowing_snow_freq_img (Type is String)
- fullnamepath: /spolar_lorate_blowing_snow_freq_img (Type is String)

global_aerosol_frac[ /global_grid_lat= 0..59] [ /global_grid_lon= 0..119] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- long_name: Global Aerosol Fraction (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.1.1, Section 5.0, Table 5. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: modelResult (Type is String)
- description: The global aerosol fraction two-dimensional atmospheric gridded parameter. For each global grid cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one aerosol layer (layer_attr (,) = 2 within cloud_flag_atm () layers) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded global aerosol fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The ATL09 required number of layers (cloud_flag_atm ()) and the layer attribute flag (layer_attr (,)) are determined from the backscatter profile using the DDA layer finder in the L3A ATM high-rate profile processing. Grid array organization: global_aerosol_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly global_grid_lon_scale = 3.0 degrees and the global_grid_lat_scale = 3.0 degrees, the global gridded array dimension is: global_aerosol_frac (120,60), type: floating point. Reference: global_aerosol_frac (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the global projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "global_aerosol_frac_img" in the ATL16 product. The applicable global observation counts for this atmosphere gridded parameter are available from: global_cloud_aerosol_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- coordinates: global_grid_lon global_grid_lat (Type is String)
- origname: global_aerosol_frac (Type is String)
- fullnamepath: /global_aerosol_frac (Type is String)

npolar_asr_obs_grid[ /npolar_grid_lat= 0..29] [ /npolar_grid_lon= 0..119] (Type is Float32)

attributes
- long_name: north polar apparent surface reflectance observation grid (Type is String)
- units: 1 (Type is String)
- source: L3B ATM ATBD, Section 3.9, Table 4., Section 5.0, Table 5. (Type is String)
- contentType: modelResult (Type is String)
- description: The north polar apparent surface reflectance (ASR) observation count two-dimensional gridded parameter. The number of observations used to compute the average north polar apparent surface reflectance (ASR). Only surface signal detected ASR 25 Hz (high-rate profile) observations (apparent_surf_reflec () > 0.0) in each grid cell are used to compute the cell north polar ASR (npolar_asr (i,j)). Grid array organization: npolar_asr_obs_grid (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the weekly gridded array dimension is: npolar_asr_obs_grid (120,30), type: floating point. Reference: npolar_asr_obs_grid (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. The north polar observation counts are applicable to to the atmosphere gridded parameter: npolar_asr (i,j). (Type is String)
- coordinates: npolar_grid_lon npolar_grid_lat (Type is String)
- origname: npolar_asr_obs_grid (Type is String)
- fullnamepath: /npolar_asr_obs_grid (Type is String)

npolar_midcloud_frac[ /npolar_grid_lat= 0..29] [ /npolar_grid_lon= 0..119] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- long_name: North Polar Mid Cloud Fraction (> 4km and <= 8km) (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.3.1, Section 5.0, Table 5. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: modelResult (Type is String)
- description: The north polar middle (> 4km and <= 8km) cloud fraction two-dimensional atmospheric gridded parameter. For each north polar grid cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1 within cloud_flag_atm () layers) that occurs above 4 km and up to and including 8 km from the layer top (layer_top (,) > 4.0 and <= 8.0 within cloud_flag_atm () layers) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded north polar middle cloud fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The ATL09 required number of layers (cloud_flag_atm ()), the layer attribute flag (layer_attr (,)), and the height of the detected layers (layer_top (,)) are determined from the backscatter profile using the DDA layer finder in the L3A ATM high-rate profile processing. Grid array organization: npolar_midcloud_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the weekly gridded array dimension is: npolar_midcloud_frac (120,30), type: floating point. Reference: npolar_midcloud_frac (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "npolar_midcloud_frac_img" in the ATL16 product. The applicable north polar observation counts for this atmosphere gridded parameter are available from: npolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- coordinates: npolar_grid_lon npolar_grid_lat (Type is String)
- origname: npolar_midcloud_frac (Type is String)
- fullnamepath: /npolar_midcloud_frac (Type is String)

global_grnd_detect[ /global_grid_lat= 0..59] [ /global_grid_lon= 0..119] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- long_name: Global Ground Detection Frequency (fraction) (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.6, Section 5.0, Table 5. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: modelResult (Type is String)
- description: The global ground detection frequency two-dimensional atmospheric gridded parameter. For each global grid cell this represents the number of detected surface signal 25 Hz (high-rate profile) observations (surface_sig () > 0.0) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded global ground detection values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The calculation results in a fractional value. The ATL09 required detected surface signal (surface_sig ()) is determined from the surface signal count of the number of photons in the detected surface bin in the L3A ATM high-rate profile processing. Grid array organization: global_grnd_detect (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given weekly global_grid_lon_scale = 3.0 degrees and global_grid_lat_scale = 3.0 degrees, gridded array dimension: global_grnd_detect (120,60), type: floating point. Reference: global_grnd_detect (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the global projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "global_ground_detect_img" in the ATL16 product. The applicable global observation counts for this atmosphere gridded parameter are available from: global_cloud_aerosol_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- coordinates: global_grid_lon global_grid_lat (Type is String)
- origname: global_grnd_detect (Type is String)
- fullnamepath: /global_grnd_detect (Type is String)

spolar_highcloud_frac_img[ /FakeDim4= 0..637] [ /FakeDim5= 0..561] [ /FakeDim3= 0..2] (Type is Byte)

attributes
- CLASS: IMAGE (Type is String)
- IMAGE_VERSION: 1.2 (Type is String)
- IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String)
- INTERLACE_MODE: INTERLACE_PIXEL (Type is String)
- origname: spolar_highcloud_frac_img (Type is String)
- fullnamepath: /spolar_highcloud_frac_img (Type is String)

quality_assessment_qa_granule_fail_reason[ /FakeDim0= 0..0] (Type is Int32)

attributes
- long_name: Granule Failure Reason (Type is String)
- units: 1 (Type is String)
- source: Operations (Type is String)
- valid_min: 0 (Type is Int32)
- valid_max: 5 (Type is Int32)
- contentType: qualityInformation (Type is String)
- description: Flag indicating granule failure reason. 0=no failure; 1=processing error; 2=Insufficient output data was generated; 3=TBD Failure; 4=TBD Failure; 5=other failure. (Type is String)
- flag_meanings: no_failure PROCESS_ERROR INSUFFICIENT_OUTPUT failure_3 failure_4 OTHER_FAILURE (Type is String)
- flag_values: 0, 1, 2, 3, 4, 5 (Type is Int32)
- origname: qa_granule_fail_reason (Type is String)
- fullnamepath: /quality_assessment/qa_granule_fail_reason (Type is String)

quality_assessment_qa_granule_pass_fail[ /FakeDim0= 0..0] (Type is Int32)

attributes
- long_name: Granule Pass Flag (Type is String)
- units: 1 (Type is String)
- source: Operations (Type is String)
- valid_min: 0 (Type is Int32)
- valid_max: 1 (Type is Int32)
- contentType: qualityInformation (Type is String)
- description: Flag indicating granule quality. 0=granule passes automatic QA. 1=granule fails automatic QA. (Type is String)
- flag_meanings: PASS FAIL (Type is String)
- flag_values: 0, 1 (Type is Int32)
- origname: qa_granule_pass_fail (Type is String)
- fullnamepath: /quality_assessment/qa_granule_pass_fail (Type is String)

quality_assessment_atmosphere_global_aerosol_frac_mean[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: global aerosol fraction mean value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The global aerosol fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: global_aerosol_frac_mean (Type is String)
- fullnamepath: /quality_assessment/atmosphere/global_aerosol_frac_mean (Type is String)

quality_assessment_atmosphere_spolar_totalcloud_frac_mean[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: south polar total cloud fraction mean value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The south polar total cloud fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: spolar_totalcloud_frac_mean (Type is String)
- fullnamepath: /quality_assessment/atmosphere/spolar_totalcloud_frac_mean (Type is String)

quality_assessment_atmosphere_global_asr_mean[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: global apparent surface reflectance mean value (Type is String)
- units: 1 (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 3.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The global apparent surface reflectance gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.08103633). (Type is String)
- origname: global_asr_mean (Type is String)
- fullnamepath: /quality_assessment/atmosphere/global_asr_mean (Type is String)

quality_assessment_atmosphere_global_aerosol_frac_min[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: global aerosol fraction minimum value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The global aerosol fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: global_aerosol_frac_min (Type is String)
- fullnamepath: /quality_assessment/atmosphere/global_aerosol_frac_min (Type is String)

quality_assessment_atmosphere_npolar_asr_max[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: north polar apparent surface reflectance maximum value (Type is String)
- units: 1 (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 3.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The north polar apparent surface reflectance gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.08103633). (Type is String)
- origname: npolar_asr_max (Type is String)
- fullnamepath: /quality_assessment/atmosphere/npolar_asr_max (Type is String)

quality_assessment_atmosphere_spolar_totalcloud_frac_sdev[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: south polar total cloud fraction standard deviation value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The south polar total cloud fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: spolar_totalcloud_frac_sdev (Type is String)
- fullnamepath: /quality_assessment/atmosphere/spolar_totalcloud_frac_sdev (Type is String)

quality_assessment_atmosphere_npolar_highcloud_frac_sdev[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: north polar high (> 8km) cloud fraction standard deviation value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The north polar high (> 8km) cloud fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: npolar_highcloud_frac_sdev (Type is String)
- fullnamepath: /quality_assessment/atmosphere/npolar_highcloud_frac_sdev (Type is String)

quality_assessment_atmosphere_npolar_midcloud_frac_max[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: north polar middle (> 4km and <= 8km) cloud fraction maximum value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The north polar middle (> 4km and <= 8km) cloud fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: npolar_midcloud_frac_max (Type is String)
- fullnamepath: /quality_assessment/atmosphere/npolar_midcloud_frac_max (Type is String)

quality_assessment_atmosphere_npolar_lorate_blowing_snow_freq_mean[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: north polar low-rate blowing snow frequency mean value (Type is String)
- units: percent (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 100.0000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The north polar low-rate blowing snow frequency gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. (Type is String)
- origname: npolar_lorate_blowing_snow_freq_mean (Type is String)
- fullnamepath: /quality_assessment/atmosphere/npolar_lorate_blowing_snow_freq_mean (Type is String)

quality_assessment_atmosphere_spolar_lowcloud_frac_mean[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: south polar low (<= 4km) cloud fraction mean value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The south polar low (<= 4km) cloud fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: spolar_lowcloud_frac_mean (Type is String)
- fullnamepath: /quality_assessment/atmosphere/spolar_lowcloud_frac_mean (Type is String)

quality_assessment_atmosphere_spolar_totalcloud_frac_min[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: south polar total cloud fraction minimum value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The south polar total cloud fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: spolar_totalcloud_frac_min (Type is String)
- fullnamepath: /quality_assessment/atmosphere/spolar_totalcloud_frac_min (Type is String)

quality_assessment_atmosphere_global_asr_sdev[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: global apparent surface reflectance standard deviation value (Type is String)
- units: 1 (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 3.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The global apparent surface reflectance gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.08103633). (Type is String)
- origname: global_asr_sdev (Type is String)
- fullnamepath: /quality_assessment/atmosphere/global_asr_sdev (Type is String)

quality_assessment_atmosphere_global_grnd_detect_mean[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: global ground detection frequency mean value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The global ground detection frequency gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: global_grnd_detect_mean (Type is String)
- fullnamepath: /quality_assessment/atmosphere/global_grnd_detect_mean (Type is String)

quality_assessment_atmosphere_spolar_transcloud_frac_sdev[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: south polar transmissive cloud fraction standard deviation value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The south polar transmissive cloud fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: spolar_transcloud_frac_sdev (Type is String)
- fullnamepath: /quality_assessment/atmosphere/spolar_transcloud_frac_sdev (Type is String)

quality_assessment_atmosphere_npolar_highcloud_frac_max[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: north polar high (> 8km) cloud fraction maximum value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The north polar high (> 8km) cloud fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: npolar_highcloud_frac_max (Type is String)
- fullnamepath: /quality_assessment/atmosphere/npolar_highcloud_frac_max (Type is String)

quality_assessment_atmosphere_spolar_asr_min[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: south polar apparent surface reflectance minimum value (Type is String)
- units: 1 (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 3.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The south polar apparent surface reflectance gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.08103633). (Type is String)
- origname: spolar_asr_min (Type is String)
- fullnamepath: /quality_assessment/atmosphere/spolar_asr_min (Type is String)

quality_assessment_atmosphere_npolar_lorate_blowing_snow_freq_sdev[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: north polar low-rate blowing snow frequency standard deviation value (Type is String)
- units: percent (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 100.0000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The north polar low-rate blowing snow frequency gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. (Type is String)
- origname: npolar_lorate_blowing_snow_freq_sdev (Type is String)
- fullnamepath: /quality_assessment/atmosphere/npolar_lorate_blowing_snow_freq_sdev (Type is String)

quality_assessment_atmosphere_npolar_grnd_detect_min[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: north polar ground detection frequency minimum value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The north polar ground detection frequency gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: npolar_grnd_detect_min (Type is String)
- fullnamepath: /quality_assessment/atmosphere/npolar_grnd_detect_min (Type is String)

quality_assessment_atmosphere_spolar_opaquecloud_frac_min[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: south polar opaque cloud fraction minimum value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The south polar opaque cloud fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: spolar_opaquecloud_frac_min (Type is String)
- fullnamepath: /quality_assessment/atmosphere/spolar_opaquecloud_frac_min (Type is String)

quality_assessment_atmosphere_spolar_highcloud_frac_max[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: south polar high (> 8km) cloud fraction maximum value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The south polar high (> 8km) cloud fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: spolar_highcloud_frac_max (Type is String)
- fullnamepath: /quality_assessment/atmosphere/spolar_highcloud_frac_max (Type is String)

quality_assessment_atmosphere_spolar_grnd_detect_mean[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: south polar ground detection frequency mean value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The south polar ground detection frequency gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: spolar_grnd_detect_mean (Type is String)
- fullnamepath: /quality_assessment/atmosphere/spolar_grnd_detect_mean (Type is String)

quality_assessment_atmosphere_spolar_opaquecloud_frac_sdev[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: south polar opaque cloud fraction standard deviation value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The south polar opaque cloud fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: spolar_opaquecloud_frac_sdev (Type is String)
- fullnamepath: /quality_assessment/atmosphere/spolar_opaquecloud_frac_sdev (Type is String)

quality_assessment_atmosphere_spolar_transcloud_frac_max[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: south polar transmissive cloud fraction maximum value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The south polar transmissive cloud fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: spolar_transcloud_frac_max (Type is String)
- fullnamepath: /quality_assessment/atmosphere/spolar_transcloud_frac_max (Type is String)

quality_assessment_atmosphere_spolar_lowcloud_frac_min[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: south polar low (<= 4km) cloud fraction minimum value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The south polar low (<= 4km) cloud fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: spolar_lowcloud_frac_min (Type is String)
- fullnamepath: /quality_assessment/atmosphere/spolar_lowcloud_frac_min (Type is String)

quality_assessment_atmosphere_spolar_midcloud_frac_sdev[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: south polar middle (> 4km and <= 8km) cloud fraction standard deviation value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The south polar middle (> 4km and <= 8km) cloud fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: spolar_midcloud_frac_sdev (Type is String)
- fullnamepath: /quality_assessment/atmosphere/spolar_midcloud_frac_sdev (Type is String)

quality_assessment_atmosphere_spolar_midcloud_frac_mean[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: south polar middle (> 4km and <= 8km) cloud fraction mean value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The south polar middle (> 4km and <= 8km) cloud fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: spolar_midcloud_frac_mean (Type is String)
- fullnamepath: /quality_assessment/atmosphere/spolar_midcloud_frac_mean (Type is String)

quality_assessment_atmosphere_spolar_midcloud_frac_min[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: south polar middle (> 4km and <= 8km) cloud fraction minimum value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The south polar middle (> 4km and <= 8km) cloud fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: spolar_midcloud_frac_min (Type is String)
- fullnamepath: /quality_assessment/atmosphere/spolar_midcloud_frac_min (Type is String)

quality_assessment_atmosphere_npolar_totalcloud_frac_mean[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: north polar total cloud fraction mean value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The north polar total cloud fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: npolar_totalcloud_frac_mean (Type is String)
- fullnamepath: /quality_assessment/atmosphere/npolar_totalcloud_frac_mean (Type is String)

quality_assessment_atmosphere_npolar_lorate_blowing_snow_freq_max[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: north polar low-rate blowing snow frequency maximum value (Type is String)
- units: percent (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 100.0000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The north polar low-rate blowing snow frequency gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. (Type is String)
- origname: npolar_lorate_blowing_snow_freq_max (Type is String)
- fullnamepath: /quality_assessment/atmosphere/npolar_lorate_blowing_snow_freq_max (Type is String)

quality_assessment_atmosphere_npolar_totalcloud_frac_max[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: north polar total cloud fraction maximum value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The north polar total cloud fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: npolar_totalcloud_frac_max (Type is String)
- fullnamepath: /quality_assessment/atmosphere/npolar_totalcloud_frac_max (Type is String)

quality_assessment_atmosphere_npolar_hirate_blowing_snow_freq_mean[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: north polar high-rate blowing snow frequency mean value (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 100.0000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The north polar high-rate blowing snow frequency gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. (Type is String)
- units: percent (Type is String)
- origname: npolar_hirate_blowing_snow_freq_mean (Type is String)
- fullnamepath: /quality_assessment/atmosphere/npolar_hirate_blowing_snow_freq_mean (Type is String)

quality_assessment_atmosphere_global_aerosol_frac_sdev[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: global aerosol fraction standard deviation value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The global aerosol fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: global_aerosol_frac_sdev (Type is String)
- fullnamepath: /quality_assessment/atmosphere/global_aerosol_frac_sdev (Type is String)

quality_assessment_atmosphere_spolar_lowcloud_frac_sdev[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: south polar low (<= 4km) cloud fraction standard deviation value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The south polar low (<= 4km) cloud fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: spolar_lowcloud_frac_sdev (Type is String)
- fullnamepath: /quality_assessment/atmosphere/spolar_lowcloud_frac_sdev (Type is String)

quality_assessment_atmosphere_spolar_opaquecloud_frac_mean[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: south polar opaque cloud fraction mean value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The south polar opaque cloud fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: spolar_opaquecloud_frac_mean (Type is String)
- fullnamepath: /quality_assessment/atmosphere/spolar_opaquecloud_frac_mean (Type is String)

quality_assessment_atmosphere_spolar_highcloud_frac_mean[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: south polar high (> 8km) cloud fraction mean value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The south polar high (> 8km) cloud fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: spolar_highcloud_frac_mean (Type is String)
- fullnamepath: /quality_assessment/atmosphere/spolar_highcloud_frac_mean (Type is String)

quality_assessment_atmosphere_npolar_opaquecloud_frac_sdev[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: north polar opaque cloud fraction standard deviation value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The north polar opaque cloud fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: npolar_opaquecloud_frac_sdev (Type is String)
- fullnamepath: /quality_assessment/atmosphere/npolar_opaquecloud_frac_sdev (Type is String)

quality_assessment_atmosphere_spolar_lorate_blowing_snow_freq_sdev[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: south polar low-rate blowing snow frequency standard deviation value (Type is String)
- units: percent (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 100.0000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The south polar low-rate blowing snow frequency gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. (Type is String)
- origname: spolar_lorate_blowing_snow_freq_sdev (Type is String)
- fullnamepath: /quality_assessment/atmosphere/spolar_lorate_blowing_snow_freq_sdev (Type is String)

quality_assessment_atmosphere_spolar_highcloud_frac_sdev[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: south polar high (> 8km) cloud fraction standard deviation value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The south polar high (> 8km) cloud fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: spolar_highcloud_frac_sdev (Type is String)
- fullnamepath: /quality_assessment/atmosphere/spolar_highcloud_frac_sdev (Type is String)

quality_assessment_atmosphere_spolar_opaquecloud_frac_max[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: south polar opaque cloud fraction maximum value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The south polar opaque cloud fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: spolar_opaquecloud_frac_max (Type is String)
- fullnamepath: /quality_assessment/atmosphere/spolar_opaquecloud_frac_max (Type is String)

quality_assessment_atmosphere_spolar_midcloud_frac_max[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: south polar middle (> 4km and <= 8km) cloud fraction maximum value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The south polar middle (> 4km and <= 8km) cloud fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: spolar_midcloud_frac_max (Type is String)
- fullnamepath: /quality_assessment/atmosphere/spolar_midcloud_frac_max (Type is String)

quality_assessment_atmosphere_npolar_transcloud_frac_max[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: north polar transmissive cloud fraction maximum value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The north polar transmissive cloud fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: npolar_transcloud_frac_max (Type is String)
- fullnamepath: /quality_assessment/atmosphere/npolar_transcloud_frac_max (Type is String)

quality_assessment_atmosphere_global_asr_min[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: global apparent surface reflectance minimum value (Type is String)
- units: 1 (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 3.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The global apparent surface reflectance gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.08103633). (Type is String)
- origname: global_asr_min (Type is String)
- fullnamepath: /quality_assessment/atmosphere/global_asr_min (Type is String)

quality_assessment_atmosphere_npolar_asr_mean[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: north polar apparent surface reflectance mean value (Type is String)
- units: 1 (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 3.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The north polar apparent surface reflectance gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.08103633). (Type is String)
- origname: npolar_asr_mean (Type is String)
- fullnamepath: /quality_assessment/atmosphere/npolar_asr_mean (Type is String)

quality_assessment_atmosphere_spolar_lorate_blowing_snow_freq_max[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: south polar low-rate blowing snow frequency maximum value (Type is String)
- units: percent (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 100.0000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The south polar low-rate blowing snow frequency gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. (Type is String)
- origname: spolar_lorate_blowing_snow_freq_max (Type is String)
- fullnamepath: /quality_assessment/atmosphere/spolar_lorate_blowing_snow_freq_max (Type is String)

quality_assessment_atmosphere_npolar_highcloud_frac_min[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: north polar high (> 8km) cloud fraction minimum value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The north polar high (> 8km) cloud fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: npolar_highcloud_frac_min (Type is String)
- fullnamepath: /quality_assessment/atmosphere/npolar_highcloud_frac_min (Type is String)

quality_assessment_atmosphere_npolar_hirate_blowing_snow_freq_max[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: north polar high-rate blowing snow frequency maximum value (Type is String)
- units: percent (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 100.0000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The north polar high-rate blowing snow frequency gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. (Type is String)
- origname: npolar_hirate_blowing_snow_freq_max (Type is String)
- fullnamepath: /quality_assessment/atmosphere/npolar_hirate_blowing_snow_freq_max (Type is String)

quality_assessment_atmosphere_global_grnd_detect_min[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: global ground detection frequency minimum value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The global ground detection frequency gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: global_grnd_detect_min (Type is String)
- fullnamepath: /quality_assessment/atmosphere/global_grnd_detect_min (Type is String)

quality_assessment_atmosphere_spolar_asr_sdev[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: south polar apparent surface reflectance standard deviation value (Type is String)
- units: 1 (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 3.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The south polar apparent surface reflectance gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.08103633). (Type is String)
- origname: spolar_asr_sdev (Type is String)
- fullnamepath: /quality_assessment/atmosphere/spolar_asr_sdev (Type is String)

quality_assessment_atmosphere_global_grnd_detect_max[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: global ground detection frequency maximum value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The global ground detection frequency gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: global_grnd_detect_max (Type is String)
- fullnamepath: /quality_assessment/atmosphere/global_grnd_detect_max (Type is String)

quality_assessment_atmosphere_global_grnd_detect_sdev[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: global ground detection frequency standard deviation value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The global ground detection frequency gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: global_grnd_detect_sdev (Type is String)
- fullnamepath: /quality_assessment/atmosphere/global_grnd_detect_sdev (Type is String)

quality_assessment_atmosphere_spolar_transcloud_frac_min[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: south polar transmissive cloud fraction minimum value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The south polar transmissive cloud fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: spolar_transcloud_frac_min (Type is String)
- fullnamepath: /quality_assessment/atmosphere/spolar_transcloud_frac_min (Type is String)

quality_assessment_atmosphere_npolar_grnd_detect_sdev[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: north polar ground detection frequency standard deviation value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The north polar ground detection frequency gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: npolar_grnd_detect_sdev (Type is String)
- fullnamepath: /quality_assessment/atmosphere/npolar_grnd_detect_sdev (Type is String)

quality_assessment_atmosphere_npolar_grnd_detect_max[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: north polar ground detection frequency maximum value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The north polar ground detection frequency gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: npolar_grnd_detect_max (Type is String)
- fullnamepath: /quality_assessment/atmosphere/npolar_grnd_detect_max (Type is String)

quality_assessment_atmosphere_npolar_lowcloud_frac_sdev[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: north polar low (<= 4km) cloud fraction standard deviation value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The north polar low (<= 4km) cloud fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: npolar_lowcloud_frac_sdev (Type is String)
- fullnamepath: /quality_assessment/atmosphere/npolar_lowcloud_frac_sdev (Type is String)

quality_assessment_atmosphere_npolar_lowcloud_frac_mean[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: north polar low (<= 4km) cloud fraction mean value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The north polar low (<= 4km) cloud fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: npolar_lowcloud_frac_mean (Type is String)
- fullnamepath: /quality_assessment/atmosphere/npolar_lowcloud_frac_mean (Type is String)

quality_assessment_atmosphere_global_column_od_mean[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: global (over water) total column optical depth mean value (Type is String)
- units: 1 (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 4.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The global (over water) total column optical depth gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.5. Maximum value may exceed 1.5 (e.g., 2.57788515). (Type is String)
- origname: global_column_od_mean (Type is String)
- fullnamepath: /quality_assessment/atmosphere/global_column_od_mean (Type is String)

quality_assessment_atmosphere_spolar_totalcloud_frac_max[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: south polar total cloud fraction maximum value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The south polar total cloud fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: spolar_totalcloud_frac_max (Type is String)
- fullnamepath: /quality_assessment/atmosphere/spolar_totalcloud_frac_max (Type is String)

quality_assessment_atmosphere_npolar_opaquecloud_frac_mean[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: north polar opaque cloud fraction mean value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The north polar opaque cloud fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: npolar_opaquecloud_frac_mean (Type is String)
- fullnamepath: /quality_assessment/atmosphere/npolar_opaquecloud_frac_mean (Type is String)

quality_assessment_atmosphere_npolar_opaquecloud_frac_max[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: north polar opaque cloud fraction maximum value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The north polar opaque cloud fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: npolar_opaquecloud_frac_max (Type is String)
- fullnamepath: /quality_assessment/atmosphere/npolar_opaquecloud_frac_max (Type is String)

quality_assessment_atmosphere_global_column_od_max[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: global (over water) total column optical depth maximum value (Type is String)
- units: 1 (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 4.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The global (over water) total column optical depth gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.5. Maximum value may exceed 1.5 (e.g., 2.57788515). (Type is String)
- origname: global_column_od_max (Type is String)
- fullnamepath: /quality_assessment/atmosphere/global_column_od_max (Type is String)

quality_assessment_atmosphere_npolar_asr_min[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: north polar apparent surface reflectance minimum value (Type is String)
- units: 1 (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 3.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The north polar apparent surface reflectance gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.08103633). (Type is String)
- origname: npolar_asr_min (Type is String)
- fullnamepath: /quality_assessment/atmosphere/npolar_asr_min (Type is String)

quality_assessment_atmosphere_npolar_lowcloud_frac_max[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: north polar low (<= 4km) cloud fraction maximum value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The north polar low (<= 4km) cloud fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: npolar_lowcloud_frac_max (Type is String)
- fullnamepath: /quality_assessment/atmosphere/npolar_lowcloud_frac_max (Type is String)

quality_assessment_atmosphere_npolar_opaquecloud_frac_min[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: north polar opaque cloud fraction minimum value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The north polar opaque cloud fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: npolar_opaquecloud_frac_min (Type is String)
- fullnamepath: /quality_assessment/atmosphere/npolar_opaquecloud_frac_min (Type is String)

quality_assessment_atmosphere_npolar_transcloud_frac_min[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: north polar transmissive cloud fraction minimum value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The north polar transmissive cloud fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: npolar_transcloud_frac_min (Type is String)
- fullnamepath: /quality_assessment/atmosphere/npolar_transcloud_frac_min (Type is String)

quality_assessment_atmosphere_global_column_od_sdev[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: global (over water) total column optical depth standard deviation value (Type is String)
- units: 1 (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 4.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The global (over water) total column optical depth gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.5. Maximum value may exceed 1.5 (e.g., 2.57788515). (Type is String)
- origname: global_column_od_sdev (Type is String)
- fullnamepath: /quality_assessment/atmosphere/global_column_od_sdev (Type is String)

quality_assessment_atmosphere_spolar_lorate_blowing_snow_freq_min[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: south polar low-rate blowing snow frequency minimum value (Type is String)
- units: percent (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 100.0000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The south polar low-rate blowing snow frequency gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. (Type is String)
- origname: spolar_lorate_blowing_snow_freq_min (Type is String)
- fullnamepath: /quality_assessment/atmosphere/spolar_lorate_blowing_snow_freq_min (Type is String)

quality_assessment_atmosphere_spolar_hirate_blowing_snow_freq_max[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: south polar high-rate blowing snow frequency maximum value (Type is String)
- units: percent (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 100.0000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The south polar high-rate blowing snow frequency gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. (Type is String)
- origname: spolar_hirate_blowing_snow_freq_max (Type is String)
- fullnamepath: /quality_assessment/atmosphere/spolar_hirate_blowing_snow_freq_max (Type is String)

quality_assessment_atmosphere_spolar_lorate_blowing_snow_freq_mean[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: south polar low-rate blowing snow frequency mean value (Type is String)
- units: percent (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 100.0000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The south polar low-rate blowing snow frequency gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. (Type is String)
- origname: spolar_lorate_blowing_snow_freq_mean (Type is String)
- fullnamepath: /quality_assessment/atmosphere/spolar_lorate_blowing_snow_freq_mean (Type is String)

quality_assessment_atmosphere_npolar_grnd_detect_mean[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: north polar ground detection frequency mean value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The north polar ground detection frequency gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: npolar_grnd_detect_mean (Type is String)
- fullnamepath: /quality_assessment/atmosphere/npolar_grnd_detect_mean (Type is String)

quality_assessment_atmosphere_spolar_asr_mean[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: south polar apparent surface reflectance mean value (Type is String)
- units: 1 (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 3.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The south polar apparent surface reflectance gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.08103633). (Type is String)
- origname: spolar_asr_mean (Type is String)
- fullnamepath: /quality_assessment/atmosphere/spolar_asr_mean (Type is String)

quality_assessment_atmosphere_global_column_od_min[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: global (over water) total column optical depth minimum value (Type is String)
- units: 1 (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 4.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The global (over water) total column optical depth gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.5. Maximum value may exceed 1.5 (e.g., 2.57788515). (Type is String)
- origname: global_column_od_min (Type is String)
- fullnamepath: /quality_assessment/atmosphere/global_column_od_min (Type is String)

quality_assessment_atmosphere_npolar_lowcloud_frac_min[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: north polar low (<= 4km) cloud fraction minimum value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The north polar low (<= 4km) cloud fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: npolar_lowcloud_frac_min (Type is String)
- fullnamepath: /quality_assessment/atmosphere/npolar_lowcloud_frac_min (Type is String)

quality_assessment_atmosphere_spolar_grnd_detect_min[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: south polar ground detection frequency minimum value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The south polar ground detection frequency gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: spolar_grnd_detect_min (Type is String)
- fullnamepath: /quality_assessment/atmosphere/spolar_grnd_detect_min (Type is String)

quality_assessment_atmosphere_spolar_transcloud_frac_mean[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: south polar transmissive cloud fraction mean value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The south polar transmissive cloud fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: spolar_transcloud_frac_mean (Type is String)
- fullnamepath: /quality_assessment/atmosphere/spolar_transcloud_frac_mean (Type is String)

quality_assessment_atmosphere_npolar_hirate_blowing_snow_freq_sdev[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: north polar high-rate blowing snow frequency standard deviation value (Type is String)
- units: percent (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 100.0000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The north polar high-rate blowing snow frequency gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. (Type is String)
- origname: npolar_hirate_blowing_snow_freq_sdev (Type is String)
- fullnamepath: /quality_assessment/atmosphere/npolar_hirate_blowing_snow_freq_sdev (Type is String)

quality_assessment_atmosphere_global_cloud_frac_min[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: global cloud fraction minimum value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The global cloud fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: global_cloud_frac_min (Type is String)
- fullnamepath: /quality_assessment/atmosphere/global_cloud_frac_min (Type is String)

quality_assessment_atmosphere_npolar_midcloud_frac_sdev[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: north polar middle (> 4km and <= 8km) cloud fraction standard deviation value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The north polar middle (> 4km and <= 8km) cloud fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: npolar_midcloud_frac_sdev (Type is String)
- fullnamepath: /quality_assessment/atmosphere/npolar_midcloud_frac_sdev (Type is String)

quality_assessment_atmosphere_global_asr_max[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: global apparent surface reflectance maximum value (Type is String)
- units: 1 (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 3.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The global apparent surface reflectance gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.08103633). (Type is String)
- origname: global_asr_max (Type is String)
- fullnamepath: /quality_assessment/atmosphere/global_asr_max (Type is String)

quality_assessment_atmosphere_spolar_lowcloud_frac_max[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: south polar low (<= 4km) cloud fraction maximum value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The south polar low (<= 4km) cloud fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: spolar_lowcloud_frac_max (Type is String)
- fullnamepath: /quality_assessment/atmosphere/spolar_lowcloud_frac_max (Type is String)

quality_assessment_atmosphere_npolar_hirate_blowing_snow_freq_min[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: north polar high-rate blowing snow frequency minimum value (Type is String)
- units: percent (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 100.0000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The north polar high-rate blowing snow frequency gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. (Type is String)
- origname: npolar_hirate_blowing_snow_freq_min (Type is String)
- fullnamepath: /quality_assessment/atmosphere/npolar_hirate_blowing_snow_freq_min (Type is String)

quality_assessment_atmosphere_npolar_totalcloud_frac_min[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: north polar total cloud fraction minimum value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The north polar total cloud fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: npolar_totalcloud_frac_min (Type is String)
- fullnamepath: /quality_assessment/atmosphere/npolar_totalcloud_frac_min (Type is String)

quality_assessment_atmosphere_global_aerosol_frac_max[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: global aerosol fraction maximum value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The global aerosol fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: global_aerosol_frac_max (Type is String)
- fullnamepath: /quality_assessment/atmosphere/global_aerosol_frac_max (Type is String)

quality_assessment_atmosphere_global_cloud_frac_max[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: global cloud fraction maximum value (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The global cloud fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- units: fraction (Type is String)
- origname: global_cloud_frac_max (Type is String)
- fullnamepath: /quality_assessment/atmosphere/global_cloud_frac_max (Type is String)

quality_assessment_atmosphere_npolar_lorate_blowing_snow_freq_min[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: north polar low-rate blowing snow frequency minimum value (Type is String)
- units: percent (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 100.0000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The north polar low-rate blowing snow frequency gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. (Type is String)
- origname: npolar_lorate_blowing_snow_freq_min (Type is String)
- fullnamepath: /quality_assessment/atmosphere/npolar_lorate_blowing_snow_freq_min (Type is String)

quality_assessment_atmosphere_spolar_hirate_blowing_snow_freq_sdev[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: south polar high-rate blowing snow frequency standard deviation value (Type is String)
- units: percent (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 100.0000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The south polar high-rate blowing snow frequency gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. (Type is String)
- origname: spolar_hirate_blowing_snow_freq_sdev (Type is String)
- fullnamepath: /quality_assessment/atmosphere/spolar_hirate_blowing_snow_freq_sdev (Type is String)

quality_assessment_atmosphere_spolar_hirate_blowing_snow_freq_min[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: south polar high-rate blowing snow frequency minimum value (Type is String)
- units: percent (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 100.0000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The south polar high-rate blowing snow frequency gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. (Type is String)
- origname: spolar_hirate_blowing_snow_freq_min (Type is String)
- fullnamepath: /quality_assessment/atmosphere/spolar_hirate_blowing_snow_freq_min (Type is String)

quality_assessment_atmosphere_npolar_transcloud_frac_mean[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: north polar transmissive cloud fraction mean value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The north polar transmissive cloud fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: npolar_transcloud_frac_mean (Type is String)
- fullnamepath: /quality_assessment/atmosphere/npolar_transcloud_frac_mean (Type is String)

quality_assessment_atmosphere_spolar_highcloud_frac_min[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: south polar high (> 8km) cloud fraction minimum value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The south polar high (> 8km) cloud fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: spolar_highcloud_frac_min (Type is String)
- fullnamepath: /quality_assessment/atmosphere/spolar_highcloud_frac_min (Type is String)

quality_assessment_atmosphere_spolar_hirate_blowing_snow_freq_mean[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: south polar high-rate blowing snow frequency mean value (Type is String)
- units: percent (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 100.0000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The south polar high-rate blowing snow frequency gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. (Type is String)
- origname: spolar_hirate_blowing_snow_freq_mean (Type is String)
- fullnamepath: /quality_assessment/atmosphere/spolar_hirate_blowing_snow_freq_mean (Type is String)

quality_assessment_atmosphere_global_cloud_frac_sdev[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: global cloud fraction standard deviation value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The global cloud fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: global_cloud_frac_sdev (Type is String)
- fullnamepath: /quality_assessment/atmosphere/global_cloud_frac_sdev (Type is String)

quality_assessment_atmosphere_npolar_highcloud_frac_mean[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: north polar high (> 8km) cloud fraction mean value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The north polar high (> 8km) cloud fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: npolar_highcloud_frac_mean (Type is String)
- fullnamepath: /quality_assessment/atmosphere/npolar_highcloud_frac_mean (Type is String)

quality_assessment_atmosphere_npolar_midcloud_frac_min[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: north polar middle (> 4km and <= 8km) cloud fraction minimum value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The north polar middle (> 4km and <= 8km) cloud fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: npolar_midcloud_frac_min (Type is String)
- fullnamepath: /quality_assessment/atmosphere/npolar_midcloud_frac_min (Type is String)

quality_assessment_atmosphere_global_cloud_frac_mean[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: global cloud fraction mean value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The global cloud fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: global_cloud_frac_mean (Type is String)
- fullnamepath: /quality_assessment/atmosphere/global_cloud_frac_mean (Type is String)

quality_assessment_atmosphere_spolar_asr_max[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: south polar apparent surface reflectance maximum value (Type is String)
- units: 1 (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 3.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The south polar apparent surface reflectance gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.08103633). (Type is String)
- origname: spolar_asr_max (Type is String)
- fullnamepath: /quality_assessment/atmosphere/spolar_asr_max (Type is String)

quality_assessment_atmosphere_npolar_asr_sdev[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: north polar apparent surface reflectance standard deviation value (Type is String)
- units: 1 (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 3.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The north polar apparent surface reflectance gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.08103633). (Type is String)
- origname: npolar_asr_sdev (Type is String)
- fullnamepath: /quality_assessment/atmosphere/npolar_asr_sdev (Type is String)

quality_assessment_atmosphere_spolar_grnd_detect_sdev[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: south polar ground detection frequency standard deviation value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The south polar ground detection frequency gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: spolar_grnd_detect_sdev (Type is String)
- fullnamepath: /quality_assessment/atmosphere/spolar_grnd_detect_sdev (Type is String)

quality_assessment_atmosphere_npolar_midcloud_frac_mean[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: north polar middle (> 4km and <= 8km) cloud fraction mean value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The north polar middle (> 4km and <= 8km) cloud fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: npolar_midcloud_frac_mean (Type is String)
- fullnamepath: /quality_assessment/atmosphere/npolar_midcloud_frac_mean (Type is String)

quality_assessment_atmosphere_npolar_totalcloud_frac_sdev[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: north polar total cloud fraction standard deviation value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The north polar total cloud fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: npolar_totalcloud_frac_sdev (Type is String)
- fullnamepath: /quality_assessment/atmosphere/npolar_totalcloud_frac_sdev (Type is String)

quality_assessment_atmosphere_npolar_transcloud_frac_sdev[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: north polar transmissive cloud fraction standard deviation value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The north polar transmissive cloud fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: npolar_transcloud_frac_sdev (Type is String)
- fullnamepath: /quality_assessment/atmosphere/npolar_transcloud_frac_sdev (Type is String)

quality_assessment_atmosphere_spolar_grnd_detect_max[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: south polar ground detection frequency maximum value (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: qualityInformation (Type is String)
- description: The south polar ground detection frequency gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- origname: spolar_grnd_detect_max (Type is String)
- fullnamepath: /quality_assessment/atmosphere/spolar_grnd_detect_max (Type is String)

spolar_asr[ /spolar_grid_lat= 0..29] [ /spolar_grid_lon= 0..119] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- long_name: South Polar Apparent Surface Reflectance (0-1) (Type is String)
- units: 1 (Type is String)
- source: L3B ATM ATBD, Section 3.5, Section 5.0, Table 5. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: modelResult (Type is String)
- description: The south polar apparent surface reflectance (ASR) two-dimensional atmospheric gridded parameter. For each south polar grid cell this represents the ratio of the summation of the detected surface signal apparent surface reflectivity 25 Hz (high-rate profile) observations (apparent_surf_reflec () > 0.0) to the number of detected surface signal ASR 25 Hz (high-rate profile) observations (spolar_asr_obs_grid (i,j)) in the cell. The gridded average south polar ASR values are produced when the number of detected surface signal ASR 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (spolar_asr_obs_grid (i,j) => obs_minimum); otherwise set to INVALID. ASR represents the true surface reflectivity modified by the two-way atmospheric transmission. Generally a number between 0.0 and 1.0. ASR is related to the ratio of the received energy to the transmitted energy, assuming a Lambertian surface reflectance. The ATL09 required surface signal apparent surface reflectance (apparent_surf_reflec ()) values are determined in the L3A ATM high-rate profile processing. Grid array organization: spolar_asr (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given weekly polar_grid_lon_scale = 3.0 degrees and polar_grid_lat_scale = 1.0 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the weekly gridded array dimension: is spolar_asr (120,30), type: floating point. Reference: spolar_asr (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "spolar_asr_img" in the ATL16 product. The applicable south polar observation counts for this atmosphere gridded parameter are available from: spolar_asr_obs_grid (i,j). Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.08103633). Image will be limited to the range of 0.0 to 1.0. (Type is String)
- coordinates: spolar_grid_lon spolar_grid_lat (Type is String)
- origname: spolar_asr (Type is String)
- fullnamepath: /spolar_asr (Type is String)

npolar_transcloud_frac_img[ /FakeDim4= 0..637] [ /FakeDim5= 0..561] [ /FakeDim3= 0..2] (Type is Byte)

attributes
- CLASS: IMAGE (Type is String)
- IMAGE_VERSION: 1.2 (Type is String)
- IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String)
- INTERLACE_MODE: INTERLACE_PIXEL (Type is String)
- origname: npolar_transcloud_frac_img (Type is String)
- fullnamepath: /npolar_transcloud_frac_img (Type is String)

global_column_od_img[ /FakeDim1= 0..723] [ /FakeDim2= 0..1026] [ /FakeDim3= 0..2] (Type is Byte)

attributes
- CLASS: IMAGE (Type is String)
- IMAGE_VERSION: 1.2 (Type is String)
- IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String)
- INTERLACE_MODE: INTERLACE_PIXEL (Type is String)
- origname: global_column_od_img (Type is String)
- fullnamepath: /global_column_od_img (Type is String)

delta_time_beg[ /FakeDim0= 0..0] (Type is Float64)

attributes
- long_name: start time (Type is String)
- standard_name: time (Type is String)
- units: seconds since 2018-01-01 (Type is String)
- source: L3B ATM ATBD, Section 5.0, Table 5. (Type is String)
- contentType: auxiliaryInformation (Type is String)
- description: The start time scalar parameter (start_time). The start time/date of the data used to make the product. Number of GPS seconds since the ATLAS SDP epoch at the beginning of the data collection. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. Type: double precision. (Type is String)
- origname: delta_time_beg (Type is String)
- fullnamepath: /delta_time_beg (Type is String)

npolar_midcloud_frac_img[ /FakeDim4= 0..637] [ /FakeDim5= 0..561] [ /FakeDim3= 0..2] (Type is Byte)

attributes
- CLASS: IMAGE (Type is String)
- IMAGE_VERSION: 1.2 (Type is String)
- IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String)
- INTERLACE_MODE: INTERLACE_PIXEL (Type is String)
- origname: npolar_midcloud_frac_img (Type is String)
- fullnamepath: /npolar_midcloud_frac_img (Type is String)

global_cloud_aerosol_obs_grid[ /global_grid_lat= 0..59] [ /global_grid_lon= 0..119] (Type is Float32)

attributes
- long_name: global cloud and aerosol fraction observation grid (Type is String)
- units: 1 (Type is String)
- source: L3B ATM ATBD, Section 3.9, Table 4., Section 5.0, Table 5. (Type is String)
- contentType: modelResult (Type is String)
- description: The global cloud fraction and aerosol fraction observation count two-dimensional gridded parameter. The number of observations used to compute the global cloud fraction and the global aerosol fraction. This number represents all 25 Hz (high-rate profile) observations in each cell. Only 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1) in each grid cell are used to compute the cell global cloud fraction (global_cloud_frac (i,j)). Only 25 Hz (high-rate profile) observations with at least one aerosol layer (layer_attr (,) = 2) in each grid cell are used to compute the cell global aerosol fraction (global_aerosol_frac (i,j)). Given equivalent 25 Hz (high-rate profile) observation counts for cloud fraction and aerosol fraction, this grid array is loaded from the global cloud fraction total observation counts. Grid array organization: global_cloud_aerosol_obs_grid (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly global_grid_lon_scale = 3.0 degrees and the global_grid_lat_scale = 3.0 degrees, the weekly global gridded array dimension is: global_cloud_aerosol_obs_grid (120,60), type: floating point. Reference: global_cloud_aerosol_obs_grid (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the global projection array. The global observation counts are applicable to these atmosphere gridded parameters: global_cloud_frac (i,j), global_aerosol_frac (i,j), and global_grnd_detect (i,j). (Type is String)
- coordinates: global_grid_lon global_grid_lat (Type is String)
- origname: global_cloud_aerosol_obs_grid (Type is String)
- fullnamepath: /global_cloud_aerosol_obs_grid (Type is String)

npolar_lorate_blowing_snow_freq[ /npolar_grid_lat= 0..29] [ /npolar_grid_lon= 0..119] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- long_name: North Polar Low-Rate Blowing Snow Frequency (percent) (Type is String)
- units: percent (Type is String)
- source: L3B ATM ATBD, Section 3.4, Section 5.0, Table 5. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 100.0000000 (Type is Float32)
- contentType: modelResult (Type is String)
- description: The north polar low-rate blowing snow frequency two-dimensional atmospheric gridded parameter. For each north polar grid cell this represents the ratio of the number of the valid detected blowing snow layer top height 1 Hz (low-rate profile) observations (bsnow_h () .ne. INVALID and bsnow_h () > 0.0) to the number of valid blowing snow confidence flag (bsnow_con () .ne. INVALID, exceeds the surface not detected value, i.e., bsnow_con () > -3, and is implemented as bsnow_con () => -2) 1 Hz (low-rate profile) observations (npolar_lorate_bsnow_obs_grid (i,j)); the ratio is multiplied by 100.0 to obtain percent. The gridded north polar low-rate blowing snow frequency values are produced when the number of valid blowing snow confidence flag 1 Hz (low-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (npolar_lorate_bsnow_obs_grid (i,j) => obs_minimum); otherwise set to INVALID. The ATL09 required blowing snow height (bsnow_h ()) and blowing snow confidence (bsnow_con ()) values are determined in the L3A ATM low-rate profile processing. Grid array organization: npolar_lorate_blowing_snow_freq (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the weekly gridded array dimension is: npolar_lorate_blowing_snow_freq (120,30), type: floating point. Reference: npolar_lorate_blowing_snow_freq (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "npolar_lorate_blowing_snow_freq_img" in the ATL16 product. The applicable north polar observation counts for this atmosphere gridded parameter are available from: npolar_lorate_bsnow_obs_grid (i,j). Value range: minimum: 0.0, maximum: 100.0. (Type is String)
- coordinates: npolar_grid_lon npolar_grid_lat (Type is String)
- origname: npolar_lorate_blowing_snow_freq (Type is String)
- fullnamepath: /npolar_lorate_blowing_snow_freq (Type is String)

global_asr[ /global_grid_lat= 0..59] [ /global_grid_lon= 0..119] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- long_name: Global Apparent Surface Reflectance (0-1) (Type is String)
- units: 1 (Type is String)
- source: L3B ATM ATBD, Section 3.5, Section 5.0, Table 5. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: modelResult (Type is String)
- description: The global average apparent surface reflectance (ASR) two-dimensional atmospheric gridded parameter. For each global grid cell this represents the ratio of the summation of the detected surface signal apparent surface reflectivity 25 Hz (high-rate profile) observations (apparent_surf_reflec () > 0.0) to the number of detected surface signal ASR 25 Hz (high-rate profile) observations (global_asr_obs_grid (i,j)) in the cell. The gridded average global ASR values are produced when the number of detected surface signal ASR 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (global_asr_obs_grid (i,j) => obs_minimum); otherwise set to INVALID. ASR represents the true surface reflectivity modified by the two-way atmospheric transmission. Generally a number between 0.0 and 1.0. ASR is related to the ratio of the received energy to the transmitted energy, assuming a Lambertian surface reflectance. The ATL09 required surface signal apparent surface reflectance (apparent_surf_reflec ()) values are determined in the L3A ATM high-rate profile processing. Grid array organization: global_asr (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly global_grid_lon_scale = 3.0 degrees and the global_grid_lat_scale = 3.0 degrees, the gridded array dimension is: global_asr (120,60), type: floating point. Reference: global_asr (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the global projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "global_asr_img" in the ATL16 product. The applicable global observation counts for this atmosphere gridded parameter are available from: global_asr_obs_grid (i,j). Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.08103633). Image will be limited to the range of 0.0 to 1.0. (Type is String)
- coordinates: global_grid_lon global_grid_lat (Type is String)
- origname: global_asr (Type is String)
- fullnamepath: /global_asr (Type is String)

npolar_totalcloud_frac_img[ /FakeDim4= 0..637] [ /FakeDim5= 0..561] [ /FakeDim3= 0..2] (Type is Byte)

attributes
- CLASS: IMAGE (Type is String)
- IMAGE_VERSION: 1.2 (Type is String)
- IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String)
- INTERLACE_MODE: INTERLACE_PIXEL (Type is String)
- origname: npolar_totalcloud_frac_img (Type is String)
- fullnamepath: /npolar_totalcloud_frac_img (Type is String)

spolar_asr_img[ /FakeDim4= 0..637] [ /FakeDim5= 0..561] [ /FakeDim3= 0..2] (Type is Byte)

attributes
- CLASS: IMAGE (Type is String)
- IMAGE_VERSION: 1.2 (Type is String)
- IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String)
- INTERLACE_MODE: INTERLACE_PIXEL (Type is String)
- origname: spolar_asr_img (Type is String)
- fullnamepath: /spolar_asr_img (Type is String)

spolar_totalcloud_frac_img[ /FakeDim4= 0..637] [ /FakeDim5= 0..561] [ /FakeDim3= 0..2] (Type is Byte)

attributes
- CLASS: IMAGE (Type is String)
- IMAGE_VERSION: 1.2 (Type is String)
- IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String)
- INTERLACE_MODE: INTERLACE_PIXEL (Type is String)
- origname: spolar_totalcloud_frac_img (Type is String)
- fullnamepath: /spolar_totalcloud_frac_img (Type is String)

npolar_opaquecloud_frac[ /npolar_grid_lat= 0..29] [ /npolar_grid_lon= 0..119] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- long_name: North Polar Opaque Cloud Fraction (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.3.2, Section 5.0, Table 5. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: modelResult (Type is String)
- description: The north polar opaque cloud fraction two-dimensional atmospheric gridded parameter. For each north polar cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1 within cloud_flag_atm () layers) without surface signal detection (surface_sig () = 0.0) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded north polar opaque cloud fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The fraction of opaque clouds covering the entire grid cell. Opaque clouds are clouds that inhibit or absorb transmission of downward radiation through the cloud. The cloud layer with opaque characteristics exhibits no surface signal count return (=0.0), indicating that no transmitted photons reached the surface. The ATL09 required number of layers (cloud_flag_atm ()) and the layer attribute flag (layer_attr (,)) are determined from the backscatter profile using the DDA layer finder, and the required surface signal (surface_sig ()) is determined from the surface signal count of the number of photons in the detected surface bin, all in the L3A ATM high-rate profile processing. Grid array organization: npolar_opaquecloud_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the weekly gridded array dimension is: npolar_opaquecloud_frac (120,30), type: floating point. Reference: npolar_opaquecloud_frac (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "npolar_opaquecloud_frac_img" in the ATL16 product. The applicable north polar observation counts for this atmosphere gridded parameter are available from: npolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- coordinates: npolar_grid_lon npolar_grid_lat (Type is String)
- origname: npolar_opaquecloud_frac (Type is String)
- fullnamepath: /npolar_opaquecloud_frac (Type is String)

spolar_highcloud_frac[ /spolar_grid_lat= 0..29] [ /spolar_grid_lon= 0..119] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- long_name: South Polar High Cloud Fraction (> 8km) (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.3.1, Section 5.0, Table 5. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: modelResult (Type is String)
- description: The south polar high (> 8km) cloud fraction two-dimensional atmospheric gridded parameter. For each south polar grid cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1 within cloud_flag_atm () layers) that occurs above 8 km from the layer top (layer_top (,) > 8.0 within cloud_flag_atm () layers) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded south polar high cloud fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The ATL09 required number of layers (cloud_flag_atm ()), the layer attribute flag (layer_attr (,)), and the height of the detected layers (layer_top (,)) are determined from the backscatter profile using the DDA layer finder in the L3A ATM high-rate profile processing. Grid array organization: spolar_highcloud_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the weekly gridded array dimension is: spolar_highcloud_frac (120,30), type: floating point. Reference: spolar_highcloud_frac (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "spolar_highcloud_frac_img" in the ATL16 product. The applicable south polar observation counts for this atmosphere gridded parameter are available from: spolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- coordinates: spolar_grid_lon spolar_grid_lat (Type is String)
- origname: spolar_highcloud_frac (Type is String)
- fullnamepath: /spolar_highcloud_frac (Type is String)

spolar_hirate_blowing_snow_freq[ /spolar_grid_lat= 0..29] [ /spolar_grid_lon= 0..119] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- long_name: South Polar High-Rate Blowing Snow Frequency (percent) (Type is String)
- units: percent (Type is String)
- source: L3B ATM ATBD, Section 3.4, Section 5.0, Table 5. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 100.0000000 (Type is Float32)
- contentType: modelResult (Type is String)
- description: The south polar high-rate blowing snow frequency two-dimensional atmospheric gridded parameter. For each south polar grid cell this represents the ratio of the number of the valid detected blowing snow layer top height 25 Hz (high-rate profile) observations (bsnow_h () .ne. INVALID and bsnow_h () > 0.0) to the number of valid blowing snow confidence flag (bsnow_con () .ne. INVALID, exceeds the surface not detected value, i.e., bsnow_con () > -3, and is implemented as bsnow_con () => -2) 25 Hz (high-rate profile) observations (spolar_hirate_bsnow_obs_grid (i,j)); the ratio is multiplied by 100.0 to obtain percent. The gridded south polar high-rate blowing snow frequency values are produced when the number of valid blowing snow confidence flag 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (spolar_hirate_bsnow_obs_grid (i,j) => obs_minimum); otherwise set to INVALID. The ATL09 required blowing snow height (bsnow_h ()) and blowing snow confidence (bsnow_con ()) values are determined in the L3A ATM high-rate profile processing. Grid array organization: spolar_hirate_blowing_snow_freq (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the weekly gridded array dimension is: spolar_hirate_blowing_snow_freq (120,30), type: floating point. Reference: spolar_hirate_blowing_snow_freq (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "spolar_hirate_blowing_snow_freq_img" in the ATL16 product. The applicable south polar observation counts for this atmosphere gridded parameter are available from: spolar_hirate_bsnow_obs_grid (i,j). Value range: minimum: 0.0, maximum: 100.0. (Type is String)
- coordinates: spolar_grid_lon spolar_grid_lat (Type is String)
- origname: spolar_hirate_blowing_snow_freq (Type is String)
- fullnamepath: /spolar_hirate_blowing_snow_freq (Type is String)

npolar_asr[ /npolar_grid_lat= 0..29] [ /npolar_grid_lon= 0..119] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- long_name: North Polar Apparent Surface Reflectance (0-1) (Type is String)
- units: 1 (Type is String)
- source: L3B ATM ATBD, Section 3.5, Section 5.0, Table 5. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: modelResult (Type is String)
- description: The north polar apparent surface reflectance (ASR) two-dimensional atmospheric gridded parameter. For each north polar grid cell this represents the ratio of the summation of the detected surface signal apparent surface reflectivity 25 Hz (high-rate profile) observations (apparent_surf_reflec () > 0.0) to the number of detected surface signal ASR 25 Hz (high-rate profile) observations (npolar_asr_obs_grid (i,j)) in the cell. The gridded average north polar ASR values are produced when the number of detected surface signal ASR 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (npolar_asr_obs_grid (i,j) => obs_minimum); otherwise set to INVALID. ASR represents the true surface reflectivity modified by the two-way atmospheric transmission. Generally a number between 0.0 and 1.0. ASR is related to the ratio of the received energy to the transmitted energy, assuming a Lambertian surface reflectance. The ATL09 required surface signal apparent surface reflectance (apparent_surf_reflec ()) values are determined in the L3A ATM high-rate profile processing. Grid array organization: npolar_asr (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given weekly polar_grid_lon_scale = 3.0 degrees and polar_grid_lat_scale = 1.0 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the gridded array dimension: is npolar_asr (120,30), type: floating point. Reference: npolar_asr (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "npolar_asr_img" in the ATL16 product. The applicable north polar observation counts for this atmosphere gridded parameter are available from: npolar_asr_obs_grid (i,j). Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.19374275). Image will be limited to the range of 0.0 to 1.0. (Type is String)
- coordinates: npolar_grid_lon npolar_grid_lat (Type is String)
- origname: npolar_asr (Type is String)
- fullnamepath: /npolar_asr (Type is String)

spolar_lorate_bsnow_obs_grid[ /spolar_grid_lat= 0..29] [ /spolar_grid_lon= 0..119] (Type is Float32)

attributes
- long_name: south polar low-rate blowing snow frequency observation grid (Type is String)
- units: 1 (Type is String)
- source: L3B ATM ATBD, Section 3.9, Table 4., Section 5.0, Table 5. (Type is String)
- contentType: modelResult (Type is String)
- description: The south polar low-rate blowing snow observation count two-dimensional gridded parameter. The number of low-rate profile blowing snow observations used in the computation of low-rate blowing snow frequency for the Antarctic. For each south polar grid cell this represents the number of valid blowing snow confidence 1 Hz (low-rate profile) observations (bsnow_con () .ne. INVALID), where the low-rate profile blowing snow confidence value exceeds the surface not detected value (bsnow_con () > -3, and is actually implemented as bsnow_con () => -2). Only valid detected blowing snow layer top height 1 Hz (low-rate profile) observations (bsnow_h () .ne. INVALID and bsnow_h () > 0.0) and only valid blowing snow confidence 1 Hz (low-rate profile) observations (bsnow_con () .ne. INVALID), where the low-rate blowing snow confidence value exceeds the surface not detected value (bsnow_con () > -3, and is implemented as bsnow_con () => -2) in each grid cell are used to compute the cell south polar low-rate blowing snow frequency (spolar_lorate_blowing_snow_freq (i,j)). Grid array organization: spolar_lorate_bsnow_obs_grid (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the weekly gridded array dimension is: spolar_lorate_bsnow_obs_grid (120,30), type: floating point. Reference: spolar_lorate_bsnow_obs_grid (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. The south polar observation counts are applicable to the atmosphere gridded parameter: spolar_lorate_blowing_snow_freq (i,j). (Type is String)
- coordinates: spolar_grid_lon spolar_grid_lat (Type is String)
- origname: spolar_lorate_bsnow_obs_grid (Type is String)
- fullnamepath: /spolar_lorate_bsnow_obs_grid (Type is String)

npolar_asr_img[ /FakeDim4= 0..637] [ /FakeDim5= 0..561] [ /FakeDim3= 0..2] (Type is Byte)

attributes
- CLASS: IMAGE (Type is String)
- IMAGE_VERSION: 1.2 (Type is String)
- IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String)
- INTERLACE_MODE: INTERLACE_PIXEL (Type is String)
- origname: npolar_asr_img (Type is String)
- fullnamepath: /npolar_asr_img (Type is String)

spolar_midcloud_frac[ /spolar_grid_lat= 0..29] [ /spolar_grid_lon= 0..119] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- long_name: South Polar Mid Cloud Fraction (> 4km and <= 8km) (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.3.1, Section 5.0, Table 5. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: modelResult (Type is String)
- description: The south polar middle (> 4km and <= 8km) cloud fraction two-dimensional atmospheric gridded parameter. For each south polar grid cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1 within cloud_flag_atm () layers) that occurs above 4 km and up to and including 8 km from the layer top (layer_top (,) > 4.0 and <= 8.0 within cloud_flag_atm () layers) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded south polar middle cloud fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The ATL09 required number of layers (cloud_flag_atm ()), the layer attribute flag (layer_attr (,)), and the height of the detected layers (layer_top (,)) are determined from the backscatter profile using the DDA layer finder in the L3A ATM high-rate profile processing. Grid array organization: spolar_midcloud_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the weekly gridded array dimension is: spolar_midcloud_frac (120,30), type: floating point. Reference: spolar_midcloud_frac (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "spolar_midcloud_frac_img" in the ATL16 product. The applicable south polar observation counts for this atmosphere gridded parameter are available from: spolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- coordinates: spolar_grid_lon spolar_grid_lat (Type is String)
- origname: spolar_midcloud_frac (Type is String)
- fullnamepath: /spolar_midcloud_frac (Type is String)

ancillary_data_release[ /FakeDim0= 0..0] (Type is String)

attributes
- long_name: Release Number (Type is String)
- units: 1 (Type is String)
- source: Operations (Type is String)
- contentType: auxiliaryInformation (Type is String)
- description: Release number of the granule. The release number is incremented when the software or ancillary data used to create the granule has been changed. Type: character string. (Type is String)
- origname: release (Type is String)
- fullnamepath: /ancillary_data/release (Type is String)

ancillary_data_end_geoseg[ /FakeDim0= 0..0] (Type is Int32)

attributes
- long_name: Ending Geolocation Segment (Type is String)
- units: 1 (Type is String)
- source: Derived (Type is String)
- contentType: auxiliaryInformation (Type is String)
- description: The ending geolocation segment number associated with the data contained within this granule. ICESat-2 granule geographic regions are further refined by geolocation segments. During the geolocation process, a geolocation segment is created approximately every 20m from the start of the orbit to the end. The geolocation segments help align the ATLAS strong a weak beams and provide a common segment length for the L2 and higher products. The geolocation segment indices differ slightly from orbit-to-orbit because of the irregular shape of the Earth. The geolocation segment indices on ATL01 and ATL02 are only approximate because beams have not been aligned at the time of their creation. Type: integer. (Type is String)
- origname: end_geoseg (Type is String)
- fullnamepath: /ancillary_data/end_geoseg (Type is String)

ancillary_data_version[ /FakeDim0= 0..0] (Type is String)

attributes
- long_name: Version (Type is String)
- units: 1 (Type is String)
- source: Operations (Type is String)
- contentType: auxiliaryInformation (Type is String)
- description: Version number of this granule within the release. It is a sequential number corresponding to the number of times the granule has been reprocessed for the current release. Type: character string. (Type is String)
- origname: version (Type is String)
- fullnamepath: /ancillary_data/version (Type is String)

ancillary_data_end_region[ /FakeDim0= 0..0] (Type is Int32)

attributes
- long_name: Ending Region (Type is String)
- units: 1 (Type is String)
- source: Derived (Type is String)
- contentType: auxiliaryInformation (Type is String)
- description: The ending product-specific region number associated with the data contained within this granule. ICESat-2 data products are separated by geographic regions. The data contained within a specific region are the same for ATL01 and ATL02. ATL03 regions differ slightly because of different geolocation segment locations caused by the irregular shape of the Earth. The region indices for other products are completely independent. Type: integer. (Type is String)
- origname: end_region (Type is String)
- fullnamepath: /ancillary_data/end_region (Type is String)

ancillary_data_atmosphere_center_weight[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: gridded image smoothing center weight factor (Type is String)
- units: 1 (Type is String)
- source: L3B ATM ATBD, Section 4.0, Section 5.0, Table 6. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: referenceInformation (Type is String)
- description: The center_weight is a scalar control parameter. When the gridded image data parameters are smoothed, the center weight value is used to calculate the weight factor used to scale each cell in the smoothed image production. The nominal [default] center_weight value is 0.6. An execution override is provided within the production environment for replacement of the control parameter value. Type: floating point. (Type is String)
- origname: center_weight (Type is String)
- fullnamepath: /ancillary_data/atmosphere/center_weight (Type is String)

ancillary_data_atmosphere_data_type_flag[ /FakeDim0= 0..0] (Type is Int8)

attributes
- long_name: data type flag control (Type is String)
- units: 1 (Type is String)
- source: L3B ATM ATBD, Section 1.0, Section 5.0, Table 6. (Type is String)
- contentType: referenceInformation (Type is String)
- description: The data type flag is a scalar control parameter. The data_type_flag value =0 [default] indicates both night and day data were used to generate the product; the data_type_flag value =1 indicates night-only data were used to generate the product. An execution override is provided within the production environment for replacement of the control parameter value. Type: integer*1. (Type is String)
- flag_meanings: process_both_day_and_night_profile_data_DEFAULT process_night_only_profile_data (Type is String)
- flag_values: 0, 1 (Type is Int8)
- origname: data_type_flag (Type is String)
- fullnamepath: /ancillary_data/atmosphere/data_type_flag (Type is String)

ancillary_data_atmosphere_global_grid_lat_scale[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: global grid latitude scale control (Type is String)
- units: degrees/cell (Type is String)
- source: L3B ATM ATBD, Section 1.0, Table 2., Section 5.0, Table 6. (Type is String)
- contentType: referenceInformation (Type is String)
- description: The global_grid_lat_scale is a scalar control parameter presenting the global grid cell latitude resolution (scale), in degrees per cell. The nominal [default] global_grid_lat_scale value is 3.0 degrees global latitude grid cell size for the weekly ATL16 product. An execution override is provided within the production environment for replacement of the control parameter value. Type: floating point. (Type is String)
- origname: global_grid_lat_scale (Type is String)
- fullnamepath: /ancillary_data/atmosphere/global_grid_lat_scale (Type is String)

ancillary_data_atmosphere_global_grid_lon_scale[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: global grid longitude scale control (Type is String)
- units: degrees/cell (Type is String)
- source: L3B ATM ATBD, Section 1.0, Table 2., Section 5.0, Table 6. (Type is String)
- contentType: referenceInformation (Type is String)
- description: The global_grid_lon_scale is a scalar control parameter presenting the global grid cell longitude resolution (scale), in degrees per cell. The nominal [default] global_grid_lon_scale value is 3.0 degrees global longitude grid cell size for the weekly ATL16 product. An execution override is provided within the production environment for replacement of the control parameter value. Type: floating point. (Type is String)
- origname: global_grid_lon_scale (Type is String)
- fullnamepath: /ancillary_data/atmosphere/global_grid_lon_scale (Type is String)

ancillary_data_atmosphere_obs_minimum[ /FakeDim0= 0..0] (Type is Int8)

attributes
- long_name: observation count minimum value control (Type is String)
- units: 1 (Type is String)
- source: L3B ATM ATBD, Section 3.8, Section 5.0, Table 6. (Type is String)
- contentType: referenceInformation (Type is String)
- description: The obs_minimum is a scalar control parameter Indicating the minimum acceptable observation count value required to compute the specific atmosphere parameter grid cell value based on the observation count in the corresponding parameter denominator cell to be used in the rational calculation. The nominal [default] obs_minimum value is 2 for the weekly minimum observation cell count for the ATL16 product. An execution override is provided within the production environment for replacement of the control parameter value. Type: integer*1. (Type is String)
- origname: obs_minimum (Type is String)
- fullnamepath: /ancillary_data/atmosphere/obs_minimum (Type is String)

ancillary_data_atmosphere_polar_grid_lat_scale[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: polar grid latitude scale control (Type is String)
- units: degrees/cell (Type is String)
- source: L3B ATM ATBD, Section 1.0, Table 2., Section 5.0, Table 6. (Type is String)
- contentType: referenceInformation (Type is String)
- description: The polar_grid_lat_scale is a scalar control parameter presenting the north or south polar grid latitude resolution (scale), in degrees per cell. The nominal [default] polar_grid_lat_scale value is 1.0 degrees polar latitude grid cell size for the weekly ATL16 product. An execution override is provided within the production environment for replacement of the control parameter value. Type: floating point. (Type is String)
- origname: polar_grid_lat_scale (Type is String)
- fullnamepath: /ancillary_data/atmosphere/polar_grid_lat_scale (Type is String)

ancillary_data_atmosphere_polar_grid_lon_scale[ /FakeDim0= 0..0] (Type is Float32)

attributes
- long_name: polar grid longitude scale control (Type is String)
- units: degrees/cell (Type is String)
- source: L3B ATM ATBD, Section 1.0, Table 2., Section 5.0, Table 6. (Type is String)
- contentType: referenceInformation (Type is String)
- description: The polar_grid_lon_scale is a scaler control parameter presenting the north or south polar longitude grid resolution (scale), in degrees per cell. The nominal [default] polar_grid_lon_scale value is 3.0 degrees polar longitude grid cell size for the weekly ATL16 product. An execution override is provided within the production environment for replacement of the control parameter value. Type: floating point. (Type is String)
- origname: polar_grid_lon_scale (Type is String)
- fullnamepath: /ancillary_data/atmosphere/polar_grid_lon_scale (Type is String)

ancillary_data_atmosphere_smooth_grid[ /FakeDim0= 0..0] (Type is Int8)

attributes
- long_name: global and polar gridded image smoothing control (Type is String)
- units: 1 (Type is String)
- source: L3B ATM ATBD, Section 4.0, Section 5.0, Table 6. (Type is String)
- valid_min: 0 (Type is Int8)
- valid_max: 1 (Type is Int8)
- contentType: referenceInformation (Type is String)
- description: The smooth_grid is a scalar control parameter for the application of the Section 4.0 smoothing algorithm to the product global, north polar, and south polar Images. The nominal [default] smooth_grid value set to 1 indicates to apply the smoothing algorithm to the data used to generate the images; the smooth_grid value set to 0 indicates do not apply the smoothing algorithm to the data used to generate the images. When image gridded data smoothing is selected the smoothing algorithm is applied to intermediate working data arrays for each parameter, and is NOT applied to the actual product gridded parameter arrays content (i.e., the gridded data parameters remain un-smoothed). An execution override is provided within the production environment for replacement of the control parameter value. Type: integer*1. (Type is String)
- flag_meanings: apply_smoothing_to_image_data_DEFAULT do_not_apply_smoothing_to_image_data (Type is String)
- flag_values: 1, 0 (Type is Int8)
- origname: smooth_grid (Type is String)
- fullnamepath: /ancillary_data/atmosphere/smooth_grid (Type is String)

ancillary_data_atlas_sdp_gps_epoch[ /FakeDim0= 0..0] (Type is Float64)

attributes
- long_name: ATLAS Epoch Offset (Type is String)
- units: seconds since 1980-01-06T00:00:00.000000Z (Type is String)
- source: Operations (Type is String)
- contentType: auxiliaryInformation (Type is String)
- description: Number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS Standard Data Product (SDP) epoch (2018-01-01:T00.00.00.000000 UTC). Add this value to delta time parameters to compute full gps_seconds (relative to the GPS epoch) for each data point. Type: double precision. (Type is String)
- origname: atlas_sdp_gps_epoch (Type is String)
- fullnamepath: /ancillary_data/atlas_sdp_gps_epoch (Type is String)

ancillary_data_end_rgt[ /FakeDim0= 0..0] (Type is Int32)

attributes
- long_name: Ending Reference Groundtrack (Type is String)
- units: 1 (Type is String)
- source: Derived (Type is String)
- valid_min: 1 (Type is Int32)
- valid_max: 1387 (Type is Int32)
- contentType: auxiliaryInformation (Type is String)
- description: The ending reference ground track (RGT) number associated with the data contained within this granule. There are 1387 reference ground track in the ICESat-2 repeat orbit. The reference ground track increments each time the spacecraft completes a full orbit of the Earth and resets to 1 each time the spacecraft completes a full cycle. Type: integer. (Type is String)
- origname: end_rgt (Type is String)
- fullnamepath: /ancillary_data/end_rgt (Type is String)

ancillary_data_end_delta_time[ /FakeDim0= 0..0] (Type is Float64)

attributes
- long_name: ATLAS End Time (Actual) (Type is String)
- standard_name: time (Type is String)
- units: seconds since 2018-01-01 (Type is String)
- source: Derived (Type is String)
- contentType: auxiliaryInformation (Type is String)
- description: Number of GPS seconds since the ATLAS SDP epoch at the last data point in the file. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. Type: double precision. (Type is String)
- origname: end_delta_time (Type is String)
- fullnamepath: /ancillary_data/end_delta_time (Type is String)

ancillary_data_end_orbit[ /FakeDim0= 0..0] (Type is Int32)

attributes
- long_name: Ending Orbit Number (Type is String)
- units: 1 (Type is String)
- source: Derived (Type is String)
- contentType: auxiliaryInformation (Type is String)
- description: The ending orbit number associated with the data contained within this granule. The orbit number increments each time the spacecraft completes a full orbit of the Earth. Type: integer. (Type is String)
- origname: end_orbit (Type is String)
- fullnamepath: /ancillary_data/end_orbit (Type is String)

ancillary_data_start_cycle[ /FakeDim0= 0..0] (Type is Int32)

attributes
- long_name: Starting Cycle (Type is String)
- units: 1 (Type is String)
- source: Derived (Type is String)
- valid_min: 0 (Type is Int32)
- valid_max: 99 (Type is Int32)
- contentType: auxiliaryInformation (Type is String)
- description: The starting cycle number associated with the data contained within this granule. The cycle number is the counter of the number of 91-day repeat cycles completed by the mission. Type: integer. (Type is String)
- origname: start_cycle (Type is String)
- fullnamepath: /ancillary_data/start_cycle (Type is String)

ancillary_data_data_end_utc[ /FakeDim0= 0..0] (Type is String)

attributes
- long_name: End UTC Time of Granule (CCSDS-A, Actual) (Type is String)
- units: 1 (Type is String)
- source: Derived (Type is String)
- contentType: auxiliaryInformation (Type is String)
- description: UTC (in CCSDS-A format) of the last data point within the granule. Type: character string. (Type is String)
- origname: data_end_utc (Type is String)
- fullnamepath: /ancillary_data/data_end_utc (Type is String)

ancillary_data_control[ /FakeDim0= 0..0] (Type is String)

attributes
- long_name: Control File (Type is String)
- units: 1 (Type is String)
- source: Operations (Type is String)
- contentType: auxiliaryInformation (Type is String)
- description: PGE-specific control file used to generate this granule. To re-use, replace breaks (BR) with linefeeds. Type: character string. (Type is String)
- origname: control (Type is String)
- fullnamepath: /ancillary_data/control (Type is String)

ancillary_data_start_gpssow[ /FakeDim0= 0..0] (Type is Float64)

attributes
- long_name: Start GPS SOW of Granule (Actual) (Type is String)
- units: seconds (Type is String)
- source: Derived (Type is String)
- contentType: auxiliaryInformation (Type is String)
- description: GPS seconds-of-week of the first data point in the granule. Type: double precision. (Type is String)
- origname: start_gpssow (Type is String)
- fullnamepath: /ancillary_data/start_gpssow (Type is String)

ancillary_data_granule_end_utc[ /FakeDim0= 0..0] (Type is String)

attributes
- long_name: End UTC Time of Granule (CCSDS-A, Requested) (Type is String)
- units: 1 (Type is String)
- source: Derived (Type is String)
- contentType: auxiliaryInformation (Type is String)
- description: Requested end time (in UTC CCSDS-A) of this granule. Type: character string. (Type is String)
- origname: granule_end_utc (Type is String)
- fullnamepath: /ancillary_data/granule_end_utc (Type is String)

ancillary_data_end_cycle[ /FakeDim0= 0..0] (Type is Int32)

attributes
- long_name: Ending Cycle (Type is String)
- units: 1 (Type is String)
- source: Derived (Type is String)
- valid_min: 0 (Type is Int32)
- valid_max: 99 (Type is Int32)
- contentType: auxiliaryInformation (Type is String)
- description: The ending cycle number associated with the data contained within this granule. The cycle number is the counter of the number of 91-day repeat cycles completed by the mission. Type: integer. (Type is String)
- origname: end_cycle (Type is String)
- fullnamepath: /ancillary_data/end_cycle (Type is String)

ancillary_data_granule_start_utc[ /FakeDim0= 0..0] (Type is String)

attributes
- long_name: Start UTC Time of Granule (CCSDS-A, Requested) (Type is String)
- units: 1 (Type is String)
- source: Derived (Type is String)
- contentType: auxiliaryInformation (Type is String)
- description: Requested start time (in UTC CCSDS-A) of this granule. Type: character string. (Type is String)
- origname: granule_start_utc (Type is String)
- fullnamepath: /ancillary_data/granule_start_utc (Type is String)

ancillary_data_start_delta_time[ /FakeDim0= 0..0] (Type is Float64)

attributes
- long_name: ATLAS Start Time (Actual) (Type is String)
- standard_name: time (Type is String)
- units: seconds since 2018-01-01 (Type is String)
- source: Derived (Type is String)
- contentType: auxiliaryInformation (Type is String)
- description: Number of GPS seconds since the ATLAS SDP epoch at the first data point in the file. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. Type: double precision. (Type is String)
- origname: start_delta_time (Type is String)
- fullnamepath: /ancillary_data/start_delta_time (Type is String)

ancillary_data_start_geoseg[ /FakeDim0= 0..0] (Type is Int32)

attributes
- long_name: Starting Geolocation Segment (Type is String)
- units: 1 (Type is String)
- source: Derived (Type is String)
- contentType: auxiliaryInformation (Type is String)
- description: The starting geolocation segment number associated with the data contained within this granule. ICESat-2 granule geographic regions are further refined by geolocation segments. During the geolocation process, a geolocation segment is created approximately every 20m from the start of the orbit to the end. The geolocation segments help align the ATLAS strong a weak beams and provide a common segment length for the L2 and higher products. The geolocation segment indices differ slightly from orbit-to-orbit because of the irregular shape of the Earth. The geolocation segment indices on ATL01 and ATL02 are only approximate because beams have not been aligned at the time of their creation. Type: integer. (Type is String)
- origname: start_geoseg (Type is String)
- fullnamepath: /ancillary_data/start_geoseg (Type is String)

ancillary_data_start_orbit[ /FakeDim0= 0..0] (Type is Int32)

attributes
- long_name: Starting Orbit Number (Type is String)
- units: 1 (Type is String)
- source: Derived (Type is String)
- contentType: auxiliaryInformation (Type is String)
- description: The starting orbit number associated with the data contained within this granule. The orbit number increments each time the spacecraft completes a full orbit of the Earth. Type: integer. (Type is String)
- origname: start_orbit (Type is String)
- fullnamepath: /ancillary_data/start_orbit (Type is String)

ancillary_data_data_start_utc[ /FakeDim0= 0..0] (Type is String)

attributes
- long_name: Start UTC Time of Granule (CCSDS-A, Actual) (Type is String)
- units: 1 (Type is String)
- source: Derived (Type is String)
- contentType: auxiliaryInformation (Type is String)
- description: UTC (in CCSDS-A format) of the first data point within the granule. Type: character string. (Type is String)
- origname: data_start_utc (Type is String)
- fullnamepath: /ancillary_data/data_start_utc (Type is String)

ancillary_data_end_gpsweek[ /FakeDim0= 0..0] (Type is Int32)

attributes
- long_name: Ending GPSWeek of Granule (Actual) (Type is String)
- units: weeks from 1980-01-06 (Type is String)
- source: Derived (Type is String)
- contentType: auxiliaryInformation (Type is String)
- description: GPS week number of the last data point in the granule. Type: integer. (Type is String)
- origname: end_gpsweek (Type is String)
- fullnamepath: /ancillary_data/end_gpsweek (Type is String)

ancillary_data_start_rgt[ /FakeDim0= 0..0] (Type is Int32)

attributes
- long_name: Starting Reference Groundtrack (Type is String)
- units: 1 (Type is String)
- source: Derived (Type is String)
- valid_min: 1 (Type is Int32)
- valid_max: 1387 (Type is Int32)
- contentType: auxiliaryInformation (Type is String)
- description: The starting reference ground track (RGT) number associated with the data contained within this granule. There are 1387 reference ground track in the ICESat-2 repeat orbit. The reference ground track increments each time the spacecraft completes a full orbit of the Earth and resets to 1 each time the spacecraft completes a full cycle. Type: integer. (Type is String)
- origname: start_rgt (Type is String)
- fullnamepath: /ancillary_data/start_rgt (Type is String)

ancillary_data_end_gpssow[ /FakeDim0= 0..0] (Type is Float64)

attributes
- long_name: Ending GPS SOW of Granule (Actual) (Type is String)
- units: seconds (Type is String)
- source: Derived (Type is String)
- contentType: auxiliaryInformation (Type is String)
- description: GPS seconds-of-week of the last data point in the granule. Type: double precision. (Type is String)
- origname: end_gpssow (Type is String)
- fullnamepath: /ancillary_data/end_gpssow (Type is String)

ancillary_data_start_region[ /FakeDim0= 0..0] (Type is Int32)

attributes
- long_name: Starting Region (Type is String)
- units: 1 (Type is String)
- source: Derived (Type is String)
- contentType: auxiliaryInformation (Type is String)
- description: The starting product-specific region number associated with the data contained within this granule. ICESat-2 data products are separated by geographic regions. The data contained within a specific region are the same for ATL01 and ATL02. ATL03 regions differ slightly because of different geolocation segment locations caused by the irregular shape of the Earth. The region indices for other products are completely independent. Type: integer. (Type is String)
- origname: start_region (Type is String)
- fullnamepath: /ancillary_data/start_region (Type is String)

ancillary_data_start_gpsweek[ /FakeDim0= 0..0] (Type is Int32)

attributes
- long_name: Start GPSWeek of Granule (Actual) (Type is String)
- units: weeks from 1980-01-06 (Type is String)
- source: Derived (Type is String)
- contentType: auxiliaryInformation (Type is String)
- description: GPS week number of the first data point in the granule. Type: integer. (Type is String)
- origname: start_gpsweek (Type is String)
- fullnamepath: /ancillary_data/start_gpsweek (Type is String)

spolar_lorate_blowing_snow_freq[ /spolar_grid_lat= 0..29] [ /spolar_grid_lon= 0..119] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- long_name: South Polar Low-Rate Blowing Snow Frequency (percent) (Type is String)
- units: percent (Type is String)
- source: L3B ATM ATBD, Section 3.4, Section 5.0, Table 5. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 100.0000000 (Type is Float32)
- contentType: modelResult (Type is String)
- description: The south polar low-rate blowing snow frequency two-dimensional atmospheric gridded parameter. For each south polar grid cell this represents the ratio of the number of the valid detected blowing snow layer top height 1 Hz (low-rate profile) observations (bsnow_h () .ne. INVALID and bsnow_h () > 0.0) to the number of valid blowing snow confidence flag (bsnow_con () .ne. INVALID, exceeds the surface not detected value, i.e., bsnow_con () > -3, and is implemented as bsnow_con () => -2) 1 Hz (low-rate profile) observations (spolar_lorate_bsnow_obs_grid (i,j)); the ratio is multiplied by 100.0 to obtain percent. The gridded south polar low-rate blowing snow frequency values are produced when the number of valid blowing snow confidence flag 1 Hz (low-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (spolar_lorate_bsnow_obs_grid (i,j) => obs_minimum); otherwise set to INVALID. The ATL09 required blowing snow height (bsnow_h ()) and blowing snow confidence (bsnow_con ()) values are determined in the L3A ATM low-rate profile processing. Grid array organization: spolar_lorate_blowing_snow_freq (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the weekly gridded array dimension is: spolar_lorate_blowing_snow_freq (120,30), type: floating point. Reference: spolar_lorate_blowing_snow_freq (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "spolar_lorate_blowing_snow_freq_img" in the ATL16 product. The applicable south polar observation counts for this atmosphere gridded parameter are available from: spolar_lorate_bsnow_obs_grid (i,j). Value range: minimum: 0.0, maximum: 100.0. (Type is String)
- coordinates: spolar_grid_lon spolar_grid_lat (Type is String)
- origname: spolar_lorate_blowing_snow_freq (Type is String)
- fullnamepath: /spolar_lorate_blowing_snow_freq (Type is String)

spolar_transcloud_frac[ /spolar_grid_lat= 0..29] [ /spolar_grid_lon= 0..119] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- long_name: South Polar Transmissive Cloud Fraction (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.3.2, Section 5.0, Table 5. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: modelResult (Type is String)
- description: The south polar transmissive cloud fraction two-dimensional atmospheric gridded parameter. For each south polar cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1 within cloud_flag_atm () layers) with surface signal detection (surface_sig () > 0.0) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded south polar transmissive cloud fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The fraction of transmissive clouds covering the entire grid cell. Transmissive clouds are clouds that permit or allow transmission of downward radiation through the cloud. The ATL09 required number of layers (cloud_flag_atm ()) and the layer attribute flag (layer_attr (,)) are determined from the backscatter profile using the DDA layer finder, and the required detected surface signal (surface_sig ()) is determined from the surface signal count of the number of photons in the detected surface bin, all in the L3A ATM high-rate profile processing. Grid array organization: spolar_transcloud_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the weekly gridded array dimension is: spolar_transcloud_frac (120,30), type: floating point. Reference: spolar_transcloud_frac (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "spolar_transcloud_frac_img" in the ATL16 product. The applicable south polar observation counts for this atmosphere gridded parameter are available from: spolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- coordinates: spolar_grid_lon spolar_grid_lat (Type is String)
- origname: spolar_transcloud_frac (Type is String)
- fullnamepath: /spolar_transcloud_frac (Type is String)

global_cloud_frac[ /global_grid_lat= 0..59] [ /global_grid_lon= 0..119] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- long_name: Global Cloud Fraction (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.1, Section 5.0, Table 5. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: modelResult (Type is String)
- description: The global cloud fraction two-dimensional atmospheric gridded parameter. For each global grid cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1 within cloud_flag_atm () layers) to the number of all 25 Hz (high-rate profile) observations (global_cloud_aerosol_obs_grid (i,j)) in the cell. The gridded global cloud fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (global_cloud_aerosol_obs_grid (i,j) => obs_minimum); otherwise set to INVALID. The ATL09 required number of layers (cloud_flag_atm ()) and the layer attribute flag (layer_attr (,)) are determined from the backscatter profile using the DDA layer finder in the L3A ATM high-rate profile processing. A cloud fraction value of 0.0 represents a totally cloud free grid cell; a cloud fraction value of 1.0 indicates the grid cell is completely covered with clouds. Grid array organization: global_cloud_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given weekly global_grid_lon_scale = 3.0 degrees and global_grid_lat_scale = 3.0 degrees, gridded array dimension: global_cloud_frac (120,60), type: floating point. Reference: global_cloud_frac (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the global projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "global_cloud_frac_img" in the ATL16 product. The applicable global observation counts for this atmosphere gridded parameter are available from: global_cloud_aerosol_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- coordinates: global_grid_lon global_grid_lat (Type is String)
- origname: global_cloud_frac (Type is String)
- fullnamepath: /global_cloud_frac (Type is String)

spolar_cloud_obs_grid[ /spolar_grid_lat= 0..29] [ /spolar_grid_lon= 0..119] (Type is Float32)

attributes
- long_name: south polar cloud observation grid (Type is String)
- units: 1 (Type is String)
- source: L3B ATM ATBD, Section 3.9, Table 4., Section 5.0, Table 5. (Type is String)
- contentType: modelResult (Type is String)
- description: The south polar total cloud fraction observation count two-dimensional gridded parameter. The number of observations used to compute the south polar total cloud fraction. This number represents all 25 Hz (high-rate profile) observations in each cell. Only 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1) in each grid cell are used to compute the cell south polar total cloud fraction (spolar_totlcloud_frac (i,j)). Grid array organization: spolar_cloud_obs_grid (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the weekly gridded array dimension is: spolar_cloud_obs_grid (120,30), type: floating point. Reference: spolar_cloud_obs_grid (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. The south polar observation counts are applicable to these atmosphere gridded parameters: spolar_lowcloud_frac (i,j), spolar_midcloud_frac (i,j), spolar_highcloud_frac (i,j), spolar_totalcloud_frac (i,j), spolar_transcloud_frac (i,j), spolar_opaquecloud_frac (i,j), and spolar_grnd_detect (i,j). (Type is String)
- coordinates: spolar_grid_lon spolar_grid_lat (Type is String)
- origname: spolar_cloud_obs_grid (Type is String)
- fullnamepath: /spolar_cloud_obs_grid (Type is String)

spolar_transcloud_frac_img[ /FakeDim4= 0..637] [ /FakeDim5= 0..561] [ /FakeDim3= 0..2] (Type is Byte)

attributes
- CLASS: IMAGE (Type is String)
- IMAGE_VERSION: 1.2 (Type is String)
- IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String)
- INTERLACE_MODE: INTERLACE_PIXEL (Type is String)
- origname: spolar_transcloud_frac_img (Type is String)
- fullnamepath: /spolar_transcloud_frac_img (Type is String)

spolar_opaquecloud_frac[ /spolar_grid_lat= 0..29] [ /spolar_grid_lon= 0..119] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- long_name: South Polar Opaque Cloud Fraction (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.3.2, Section 5.0, Table 5. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: modelResult (Type is String)
- description: The south polar opaque cloud fraction two-dimensional atmospheric gridded parameter. For each south polar cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr () = 1 within cloud_flag_atm () layers) without surface signal detection (surface_sig () = 0.0) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded south polar opaque cloud fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The fraction of opaque clouds covering the entire grid cell. Opaque clouds are clouds that inhibit or absorb transmission of downward radiation through the cloud. The cloud layer with opaque characteristics exhibits no surface signal count return (=0.0), indicating that no transmitted photons reached the surface. The ATL09 required number of layers (cloud_flag_atm ()) and the layer attribute flag (layer_attr (,)) are determined from the backscatter profile using the DDA layer finder, and the required surface signal (surface_sig ()) is determined from the surface signal count of the number of photons in the detected surface bin, all in the L3A ATM high-rate profile processing. Grid array organization: spolar_opaquecloud_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the weekly gridded array dimension is: spolar_opaquecloud_frac (120,30), type: floating point. Reference: spolar_opaquecloud_frac (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "spolar_opaquecloud_frac_img" in the ATL16 product. The applicable south polar observation counts for this atmosphere gridded parameter are available from: spolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- coordinates: spolar_grid_lon spolar_grid_lat (Type is String)
- origname: spolar_opaquecloud_frac (Type is String)
- fullnamepath: /spolar_opaquecloud_frac (Type is String)

global_aerosol_frac_img[ /FakeDim1= 0..723] [ /FakeDim2= 0..1026] [ /FakeDim3= 0..2] (Type is Byte)

attributes
- CLASS: IMAGE (Type is String)
- IMAGE_VERSION: 1.2 (Type is String)
- IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String)
- INTERLACE_MODE: INTERLACE_PIXEL (Type is String)
- origname: global_aerosol_frac_img (Type is String)
- fullnamepath: /global_aerosol_frac_img (Type is String)

npolar_lowcloud_frac_img[ /FakeDim4= 0..637] [ /FakeDim5= 0..561] [ /FakeDim3= 0..2] (Type is Byte)

attributes
- CLASS: IMAGE (Type is String)
- IMAGE_VERSION: 1.2 (Type is String)
- IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String)
- INTERLACE_MODE: INTERLACE_PIXEL (Type is String)
- origname: npolar_lowcloud_frac_img (Type is String)
- fullnamepath: /npolar_lowcloud_frac_img (Type is String)

npolar_totalcloud_frac[ /npolar_grid_lat= 0..29] [ /npolar_grid_lon= 0..119] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- long_name: North Polar Total Cloud Fraction (Type is String)
- units: fraction (Type is String)
- source: L3B ATM ATBD, Section 3.3.1, Section 5.0, Table 5. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 1.000000000 (Type is Float32)
- contentType: modelResult (Type is String)
- description: The north polar total cloud fraction two-dimensional atmospheric gridded parameter. For each north polar grid cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1 within cloud_flag_atm () layers) to the number of all 25 Hz (high-rate profile) observations (npolar_cloud_obs_grid (i,j)) in the cell. The gridded north polar total cloud fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (npolar_cloud_obs_grid (i,j) => obs_minimum); otherwise set to INVALID. The ATL09 required number of layers (cloud_flag_atm ()) and the layer attribute flag (layer_attr (,)) are determined from the backscatter profile using the DDA layer finder in the L3A ATM high-rate profile processing. Grid array organization: npolar_totalcloud_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the weekly gridded array dimension is: npolar_totalcloud_frac (120,30), type: floating point. Reference: npolar_totalcloud_frac (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "npolar_totalcloud_frac_img" in the ATL16 product. The applicable north polar observation counts for this atmosphere gridded parameter are available from: npolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. (Type is String)
- coordinates: npolar_grid_lon npolar_grid_lat (Type is String)
- origname: npolar_totalcloud_frac (Type is String)
- fullnamepath: /npolar_totalcloud_frac (Type is String)

npolar_opaquecloud_frac_img[ /FakeDim4= 0..637] [ /FakeDim5= 0..561] [ /FakeDim3= 0..2] (Type is Byte)

attributes
- CLASS: IMAGE (Type is String)
- IMAGE_VERSION: 1.2 (Type is String)
- IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String)
- INTERLACE_MODE: INTERLACE_PIXEL (Type is String)
- origname: npolar_opaquecloud_frac_img (Type is String)
- fullnamepath: /npolar_opaquecloud_frac_img (Type is String)

spolar_midcloud_frac_img[ /FakeDim4= 0..637] [ /FakeDim5= 0..561] [ /FakeDim3= 0..2] (Type is Byte)

attributes
- CLASS: IMAGE (Type is String)
- IMAGE_VERSION: 1.2 (Type is String)
- IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String)
- INTERLACE_MODE: INTERLACE_PIXEL (Type is String)
- origname: spolar_midcloud_frac_img (Type is String)
- fullnamepath: /spolar_midcloud_frac_img (Type is String)

global_cloud_frac_img[ /FakeDim1= 0..723] [ /FakeDim2= 0..1026] [ /FakeDim3= 0..2] (Type is Byte)

attributes
- CLASS: IMAGE (Type is String)
- IMAGE_VERSION: 1.2 (Type is String)
- IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String)
- INTERLACE_MODE: INTERLACE_PIXEL (Type is String)
- origname: global_cloud_frac_img (Type is String)
- fullnamepath: /global_cloud_frac_img (Type is String)

spolar_hirate_bsnow_obs_grid[ /spolar_grid_lat= 0..29] [ /spolar_grid_lon= 0..119] (Type is Float32)

attributes
- long_name: south polar high-rate blowing snow frequency observation grid (Type is String)
- units: 1 (Type is String)
- source: L3B ATM ATBD, Section 3.9, Table 4., Section 5.0, Table 5. (Type is String)
- contentType: modelResult (Type is String)
- description: The south polar high-rate blowing snow observation count two-dimensional gridded parameter. The number of high-rate profile blowing snow observations used in the computation of high-rate blowing snow frequency for the Antarctic. For each south polar grid cell this represents the number of valid blowing snow confidence 25 Hz (high-rate profile) observations (bsnow_con () .ne. INVALID), where the high-rate profile blowing snow confidence value exceeds the surface not detected value (bsnow_con () > -3, and is actually implemented as bsnow_con () => -2). Only valid detected blowing snow layer top height 25 Hz (high-rate profile) observations (bsnow_h () .ne. INVALID and bsnow_h () > 0.0) and only valid blowing snow confidence 25 Hz (high-rate profile) observations (bsnow_con () .ne. INVALID), where the high-rate blowing snow confidence value exceeds the surface not detected value (bsnow_con () > -3, and is implemented as bsnow_con () => -2) in each grid cell are used to compute the cell south polar high-rate blowing snow frequency (spolar_hirate_blowing_snow_freq (i,j)). Grid array organization: spolar_hirate_bsnow_obs_grid (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the weekly gridded array dimension is: spolar_hirate_bsnow_obs_grid (120,30), type: floating point. Reference: spolar_hirate_bsnow_obs_grid (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. The south polar observation counts are applicable to the atmosphere gridded parameter: spolar_hirate_blowing_snow_freq (i,j). (Type is String)
- coordinates: spolar_grid_lon spolar_grid_lat (Type is String)
- origname: spolar_hirate_bsnow_obs_grid (Type is String)
- fullnamepath: /spolar_hirate_bsnow_obs_grid (Type is String)

npolar_hirate_blowing_snow_freq[ /npolar_grid_lat= 0..29] [ /npolar_grid_lon= 0..119] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- long_name: North Polar High-Rate Blowing Snow Frequency (percent) (Type is String)
- units: percent (Type is String)
- source: L3B ATM ATBD, Section 3.4, Section 5.0, Table 5. (Type is String)
- valid_min: 0.000000000 (Type is Float32)
- valid_max: 100.0000000 (Type is Float32)
- contentType: modelResult (Type is String)
- description: The north polar high-rate blowing snow frequency two-dimensional atmospheric gridded parameter. For each north polar grid cell this represents the ratio of the number of the valid detected blowing snow layer top height 25 Hz (high-rate profile) observations (bsnow_h () .ne. INVALID and bsnow_h () > 0.0) to the number of valid blowing snow confidence flag (bsnow_con () .ne. INVALID, exceeds the surface not detected value, i.e., bsnow_con () > -3, and is implemented as bsnow_con () => -2) 25 Hz (high-rate profile) observations (npolar_hirate_bsnow_obs_grid (i,j)); the ratio is multiplied by 100.0 to obtain percent. The gridded north polar high-rate blowing snow frequency values are produced when the number of valid blowing snow confidence flag 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (npolar_hirate_bsnow_obs_grid (i,j) => obs_minimum); otherwise set to INVALID. The ATL09 required blowing snow height (bsnow_h ()) and blowing snow confidence (bsnow_con ()) values are determined in the L3A ATM high-rate profile processing. Grid array organization: npolar_hirate_blowing_snow_freq (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the weekly gridded array dimension is: npolar_hirate_blowing_snow_freq (120,30), type: floating point. Reference: npolar_hirate_blowing_snow_freq (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "npolar_hirate_blowing_snow_freq_img" in the ATL16 product. The applicable north polar observation counts for this atmosphere gridded parameter are available from: npolar_hirate_bsnow_obs_grid (i,j). Value range: minimum: 0.0, maximum: 100.0. (Type is String)
- coordinates: npolar_grid_lon npolar_grid_lat (Type is String)
- origname: npolar_hirate_blowing_snow_freq (Type is String)
- fullnamepath: /npolar_hirate_blowing_snow_freq (Type is String)

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Global Attributes	View/Hide short_name: ATL16 (Type is String) level: L3B (Type is String) title: SET_BY_META (Type is String) description: The ICESat-2 ATL16 atmosphere gridded standard data product reports weekly global cloud fraction, global aerosol fraction, total column optical depth over water, polar cloud fraction, polar blowing snow frequency, global and polar apparent surface reflectivity, global and polar ground detection frequency, unique global and polar observation counts, and atmosphere gridded parameter statistical values. (Type is String) Conventions: CF-1.6 (Type is String) contributor_name: Thomas A Neumann (thomas.neumann@nasa.gov), Stephen P Palm (stephen.p.palm@nasa.gov), Suneel K Bhardwaj (suneel.k.bhardwaj@nasa.gov), David W Hancock III (david.w.hancock@nasa.gov) (Type is String) contributor_role: Project Scientist, Atmosphere Scientist, SDMS Data Producer, ASAS Data Producer (Type is String) date_type: UTC (Type is String) featureType: gridded (Type is String) geospatial_lat_units: degrees_north (Type is String) geospatial_lon_units: degrees_east (Type is String) granule_type: ATL16 (Type is String) identifier_product_doi_authority: http://dx.doi.org (Type is String) license: Data may not be reproduced or distributed without including the citation for this product included in this metadata. Data may not be distributed in an altered form without the written permission of the ICESat-2 Science Project Office at NASA/GSFC. 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<gmd:dataQualityInfo> <gmd:DQ_DataQuality> <gmd:scope> <gmd:DQ_Scope> <gmd:level> <gmd:MD_ScopeCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#MD_ScopeCode" codeListValue="dataset">dataset</gmd:MD_ScopeCode> </gmd:level> </gmd:DQ_Scope> </gmd:scope> <gmd:lineage> <gmd:LI_Lineage> <gmd:processStep> <gmi:LE_ProcessStep> <gmd:description> <gco:CharacterString>2021-03-29T15:24:21.000000Z;7f49ee23-1598-3c2e-a85b-ffc11eb960c8;Created by PGE atlas_l3b_atm Version 1.2</gco:CharacterString> </gmd:description> <gmd:dateTime> <gco:DateTime>2021-03-29T15:24:21.000000Z</gco:DateTime> </gmd:dateTime> </gmi:LE_ProcessStep> </gmd:processStep> </gmd:LI_Lineage> </gmd:lineage> </gmd:DQ_DataQuality> </gmd:dataQualityInfo> </gmi:MI_Metadata> </gmd:has> </gmd:DS_DataSet> </gmd:composedOf> <gmd:seriesMetadata gco:nilReason="missing"/> </gmd:DS_Series> (Type is String) iso_19139_series_xml: <?xml version="1.0" encoding="UTF-8"?> <gmd:DS_Series xmlns:eos="http://earthdata.nasa.gov/schema/eos" xmlns:gco="http://www.isotc211.org/2005/gco" xmlns:gmd="http://www.isotc211.org/2005/gmd" xmlns:gmi="http://www.isotc211.org/2005/gmi" xmlns:gml="http://www.opengis.net/gml/3.2" xmlns:gmx="http://www.isotc211.org/2005/gmx" xmlns:gsr="http://www.isotc211.org/2005/gsr" xmlns:gss="http://www.isotc211.org/2005/gss" xmlns:gts="http://www.isotc211.org/2005/gts" xmlns:srv="http://www.isotc211.org/2005/srv" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.isotc211.org/2005/gmi http://cdn.earthdata.nasa.gov/iso/schema/1.0/ISO19115-2_EOS.xsd"> <gmd:composedOf gco:nilReason="inapplicable"/> <gmd:seriesMetadata> <gmi:MI_Metadata> <gmd:fileIdentifier> <gco:CharacterString>ATL16.003</gco:CharacterString> </gmd:fileIdentifier> <gmd:language> <gco:CharacterString>eng</gco:CharacterString> </gmd:language> <gmd:characterSet> <gmd:MD_CharacterSetCode codeList="http://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#MD_CharacterSetCode" codeListValue="utf8">utf8</gmd:MD_CharacterSetCode> </gmd:characterSet> <gmd:hierarchyLevel> <gmd:MD_ScopeCode codeList="http://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#MD_ScopeCode" codeListValue="series">series</gmd:MD_ScopeCode> </gmd:hierarchyLevel> <gmd:contact> <gmd:CI_ResponsibleParty> <gmd:organisationName> <gco:CharacterString>NSIDC DAAC > NASA National Snow and Ice Data Center Distributed Active Archive Center</gco:CharacterString> </gmd:organisationName> <gmd:contactInfo> <gmd:CI_Contact id="NSIDC_DAAC_CONTACT_ID"> <gmd:phone> <gmd:CI_Telephone> <gmd:voice> <gco:CharacterString>303-492-6199</gco:CharacterString> </gmd:voice> <gmd:facsimile> <gco:CharacterString>303-492-2468</gco:CharacterString> </gmd:facsimile> </gmd:CI_Telephone> </gmd:phone> <gmd:address> <gmd:CI_Address> <gmd:deliveryPoint> <gco:CharacterString>1540 30th St Campus Box 449</gco:CharacterString> </gmd:deliveryPoint> <gmd:city> <gco:CharacterString>Boulder</gco:CharacterString> </gmd:city> <gmd:administrativeArea> <gco:CharacterString>Colorado</gco:CharacterString> </gmd:administrativeArea> <gmd:postalCode> <gco:CharacterString>80309-0449</gco:CharacterString> </gmd:postalCode> <gmd:country> <gco:CharacterString>USA</gco:CharacterString> </gmd:country> <gmd:electronicMailAddress> <gco:CharacterString>nsidc@nsidc.org</gco:CharacterString> </gmd:electronicMailAddress> </gmd:CI_Address> </gmd:address> <gmd:onlineResource> <gmd:CI_OnlineResource> <gmd:linkage> <gmd:URL>https://nsidc.org/daac/</gmd:URL> </gmd:linkage> </gmd:CI_OnlineResource> </gmd:onlineResource> <gmd:hoursOfService> <gco:CharacterString>9:00 A.M. to 5:00 P.M., U.S. Mountain Time, Monday through Friday, excluding U.S. holidays.</gco:CharacterString> </gmd:hoursOfService> <gmd:contactInstructions> <gco:CharacterString>Contact by e-mail first</gco:CharacterString> </gmd:contactInstructions> </gmd:CI_Contact> </gmd:contactInfo> <gmd:role> <gmd:CI_RoleCode codeList="http://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#CI_RoleCode" codeListValue="pointOfContact">pointOfContact</gmd:CI_RoleCode> </gmd:role> </gmd:CI_ResponsibleParty> </gmd:contact> <gmd:dateStamp> <gco:Date>2015-10-15</gco:Date> </gmd:dateStamp> <gmd:metadataStandardName> <gco:CharacterString>ISO 19115-2 Geographic information - Metadata - Part 2: Extensions for imagery and gridded data</gco:CharacterString> </gmd:metadataStandardName> <gmd:metadataStandardVersion> <gco:CharacterString>ISO 19115-2:2009(E)</gco:CharacterString> </gmd:metadataStandardVersion> <gmd:identificationInfo> <gmd:MD_DataIdentification> <gmd:citation> <gmd:CI_Citation> <!-- ECS extracts the LongName from here --> <!-- UMM-C expects the ShortName to precede the LongName separated by a > here --> <gmd:title> <gco:CharacterString>ATLAS/ICESat-2 L3B Weekly Gridded Atmosphere</gco:CharacterString> </gmd:title> <gmd:date> <gmd:CI_Date> <!-- ECS extracts the RevisionDate from here --> <gmd:date> <gco:Date>2016-06-09</gco:Date> </gmd:date> <gmd:dateType> <gmd:CI_DateTypeCode codeList="http://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#CI_DateTypeCode" codeListValue="revision">revision</gmd:CI_DateTypeCode> </gmd:dateType> </gmd:CI_Date> </gmd:date> <!-- VersionID is expected to be here by the Base Reference Metadata Model document --> <gmd:edition> <gco:CharacterString>003</gco:CharacterString> </gmd:edition> <gmd:identifier> <gmd:MD_Identifier> <!-- ECS extracts the ShortName from here --> <gmd:code> <gco:CharacterString>ATL16</gco:CharacterString> </gmd:code> <gmd:description> <gco:CharacterString>The ECS Short Name</gco:CharacterString> </gmd:description> </gmd:MD_Identifier> </gmd:identifier> <gmd:identifier> <gmd:MD_Identifier> <!-- ECS extracts the VersionID from here --> <gmd:code> <gco:CharacterString>003</gco:CharacterString> </gmd:code> <gmd:description> <gco:CharacterString>The ECS Version ID</gco:CharacterString> </gmd:description> </gmd:MD_Identifier> </gmd:identifier> <gmd:identifier> <gmd:MD_Identifier> <!-- This field provides the Digital Object Identifier (DOI). --> <gmd:code> <gmx:Anchor xlink:actuate="onRequest" xlink:href="https://doi.org/10.5067/ATLAS/ATL16.003">doi:10.5067/ATLAS/ATL16.003</gmx:Anchor> </gmd:code> <gmd:codeSpace> <gco:CharacterString>gov.nasa.esdis</gco:CharacterString> </gmd:codeSpace> <gmd:description> <gco:CharacterString>A Digital Object Identifier (DOI)</gco:CharacterString> </gmd:description> </gmd:MD_Identifier> </gmd:identifier> <gmd:citedResponsibleParty> <gmd:CI_ResponsibleParty> <gmd:organisationName> <gco:CharacterString>National Aeronautics and Space Administration (NASA)</gco:CharacterString> </gmd:organisationName> <gmd:role> <gmd:CI_RoleCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_RoleCode" codeListValue="resourceProvider">resourceProvider</gmd:CI_RoleCode> </gmd:role> </gmd:CI_ResponsibleParty> </gmd:citedResponsibleParty> <gmd:citedResponsibleParty> <gmd:CI_ResponsibleParty> <!-- ECS expects ProcessingCenter to be here --> <gmd:organisationName> <gco:CharacterString>GSFC I-SIPS > ICESat-2 Science Investigator-led Processing System</gco:CharacterString> </gmd:organisationName> <gmd:role> <gmd:CI_RoleCode codeList="http://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#CI_RoleCode" codeListValue="originator">originator</gmd:CI_RoleCode> </gmd:role> </gmd:CI_ResponsibleParty> </gmd:citedResponsibleParty> <!-- ECS extracts the VersionDescription from here --> <gmd:otherCitationDetails> <gco:CharacterString>Initial version of the processing software</gco:CharacterString> </gmd:otherCitationDetails> </gmd:CI_Citation> </gmd:citation> <!-- ECS extracts the CollectionDescription from here --> <gmd:abstract> <gco:CharacterString>The ICESat-2 ATL16 standard data product reports weekly global cloud fraction, total column optical depth over the oceans, polar cloud fraction, blowing snow frequency, apparent surface reflectivity, and ground detection frequency.</gco:CharacterString> </gmd:abstract> <gmd:purpose> <gco:CharacterString>The purpose of ATL16 is to provide a gridded summary of weekly global cloud fraction, total column optical depth over the oceans, polar cloud fraction, blowing snow frequency, apparent surface reflectivity, and ground detection frequency.</gco:CharacterString> </gmd:purpose> <gmd:credit> <gco:CharacterString>The software that generates the ATL16 product was designed and implemented within the ICESat-2 Science Investigator-led Processing System at the NASA Goddard Space Flight Center in Greenbelt, Maryland.</gco:CharacterString> </gmd:credit> <gmd:status> <gmd:MD_ProgressCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#MD_ProgressCode" codeListValue="onGoing">onGoing</gmd:MD_ProgressCode> </gmd:status> <gmd:pointOfContact> <gmd:CI_ResponsibleParty> <!-- ECS expects ArchiveCenter to be here --> <gmd:organisationName> <gco:CharacterString>NSIDC DAAC > NASA National Snow and Ice Data Center Distributed Active Archive Center</gco:CharacterString> </gmd:organisationName> <gmd:contactInfo xlink:href="#NSIDC_DAAC_CONTACT_ID"/> <gmd:role> <gmd:CI_RoleCode codeList="http://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#CI_RoleCode" codeListValue="distributor">distributor</gmd:CI_RoleCode> </gmd:role> </gmd:CI_ResponsibleParty> </gmd:pointOfContact> <gmd:resourceFormat> <gmd:MD_Format> <gmd:name> <gco:CharacterString>HDF</gco:CharacterString> </gmd:name> <gmd:version> <gco:CharacterString>5</gco:CharacterString> </gmd:version> </gmd:MD_Format> </gmd:resourceFormat> <gmd:descriptiveKeywords> <gmd:MD_Keywords> <gmd:keyword> <gco:CharacterString>EARTH SCIENCE > SPECTRAL/ENGINEERING > LIDAR > LIDAR BACKSCATTER > NONE > NONE > NONE</gco:CharacterString> </gmd:keyword> <gmd:keyword> <gco:CharacterString>EARTH SCIENCE > ATMOSPHERE > CLOUDS > CLOUD PROPERTIES > CLOUD HEIGHT > NONE > NONE</gco:CharacterString> </gmd:keyword> <gmd:keyword> <gco:CharacterString>EARTH SCIENCE > ATMOSPHERE > CLOUDS > CLOUD MICROPHYSICS > CLOUD OPTICAL DEPTH/THICKNESS > NONE > NONE</gco:CharacterString> </gmd:keyword> <gmd:type> <gmd:MD_KeywordTypeCode codeList="http://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#MD_KeywordTypeCode" codeListValue="theme">theme</gmd:MD_KeywordTypeCode> </gmd:type> <gmd:thesaurusName> <gmd:CI_Citation> <gmd:title> <gco:CharacterString>NASA/GCMD Science Keywords</gco:CharacterString> </gmd:title> <gmd:date gco:nilReason="unknown"/> <gmd:citedResponsibleParty> <gmd:CI_ResponsibleParty id="GCMD_USO_ID"> <gmd:organisationName> <gco:CharacterString>NASA Global Change Master Directory (GCMD) User Support Office</gco:CharacterString> </gmd:organisationName> <gmd:contactInfo> <gmd:CI_Contact> <gmd:phone gco:nilReason="missing"/> <gmd:address> <gmd:CI_Address> <gmd:deliveryPoint> <gco:CharacterString>NASA Global Change Master Directory, Goddard Space Flight Center</gco:CharacterString> </gmd:deliveryPoint> <gmd:city> <gco:CharacterString>Greenbelt</gco:CharacterString> </gmd:city> <gmd:administrativeArea> <gco:CharacterString>MD</gco:CharacterString> </gmd:administrativeArea> <gmd:postalCode> <gco:CharacterString>20771</gco:CharacterString> </gmd:postalCode> <gmd:country> <gco:CharacterString>USA</gco:CharacterString> </gmd:country> <gmd:electronicMailAddress> <gco:CharacterString>gcmduso@gcmd.gsfc.nasa.gov</gco:CharacterString> </gmd:electronicMailAddress> </gmd:CI_Address> </gmd:address> <gmd:onlineResource> <gmd:CI_OnlineResource> <gmd:linkage> <gmd:URL>https://gcmd.nasa.gov/</gmd:URL> </gmd:linkage> <gmd:protocol> <gco:CharacterString>https</gco:CharacterString> </gmd:protocol> <gmd:applicationProfile> <gco:CharacterString>web browser</gco:CharacterString> </gmd:applicationProfile> <gmd:name> <gco:CharacterString>NASA Global Change Master Directory (GCMD)</gco:CharacterString> </gmd:name> <gmd:description> <gco:CharacterString>Home Page</gco:CharacterString> </gmd:description> <gmd:function> <gmd:CI_OnLineFunctionCode codeList="http://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode" codeListValue="information">information</gmd:CI_OnLineFunctionCode> </gmd:function> </gmd:CI_OnlineResource> </gmd:onlineResource> <gmd:contactInstructions> <gco:CharacterString>http://gcmd.nasa.gov/MailComments/MailComments.jsf?rcpt=gcmduso</gco:CharacterString> </gmd:contactInstructions> </gmd:CI_Contact> </gmd:contactInfo> <gmd:role> <gmd:CI_RoleCode codeList="http://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#CI_RoleCode" codeListValue="custodian">custodian</gmd:CI_RoleCode> </gmd:role> </gmd:CI_ResponsibleParty> </gmd:citedResponsibleParty> <gmd:citedResponsibleParty> <gmd:CI_ResponsibleParty id="GCMD_KEYWORDS_ID"> <gmd:organisationName> <gco:CharacterString>Global Change Master Directory (GCMD)</gco:CharacterString> </gmd:organisationName> <gmd:contactInfo> <gmd:CI_Contact> <gmd:phone gco:nilReason="missing"/> <gmd:address> <gmd:CI_Address> <gmd:deliveryPoint> <gco:CharacterString>NASA Global Change Master Directory, Goddard Space Flight Center</gco:CharacterString> </gmd:deliveryPoint> <gmd:city> <gco:CharacterString>Greenbelt</gco:CharacterString> </gmd:city> <gmd:administrativeArea> <gco:CharacterString>MD</gco:CharacterString> </gmd:administrativeArea> <gmd:postalCode> <gco:CharacterString>20771</gco:CharacterString> </gmd:postalCode> <gmd:country> <gco:CharacterString>USA</gco:CharacterString> </gmd:country> <gmd:electronicMailAddress> <gco:CharacterString>gcmduso@gcmd.gsfc.nasa.gov</gco:CharacterString> </gmd:electronicMailAddress> </gmd:CI_Address> </gmd:address> <gmd:onlineResource> <gmd:CI_OnlineResource> <gmd:linkage> <gmd:URL>https://gcmd.nasa.gov/Resources/valids/</gmd:URL> </gmd:linkage> <gmd:protocol> <gco:CharacterString>https</gco:CharacterString> </gmd:protocol> <gmd:applicationProfile> <gco:CharacterString>web browser</gco:CharacterString> </gmd:applicationProfile> <gmd:name> <gco:CharacterString>NASA Global Change Master Directory (GCMD) Keyword Page</gco:CharacterString> </gmd:name> <gmd:description> <gco:CharacterString>This page describes the NASA GCMD Keywords, how to reference those keywords and provides download instructions.</gco:CharacterString> </gmd:description> <gmd:function> <gmd:CI_OnLineFunctionCode codeList="http://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode" codeListValue="download">download</gmd:CI_OnLineFunctionCode> </gmd:function> </gmd:CI_OnlineResource> </gmd:onlineResource> <gmd:contactInstructions> <gco:CharacterString>http://gcmd.nasa.gov/MailComments/MailComments.jsf?rcpt=gcmduso</gco:CharacterString> </gmd:contactInstructions> </gmd:CI_Contact> </gmd:contactInfo> <gmd:role> <gmd:CI_RoleCode codeList="http://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#CI_RoleCode" codeListValue="custodian">custodian</gmd:CI_RoleCode> </gmd:role> </gmd:CI_ResponsibleParty> </gmd:citedResponsibleParty> </gmd:CI_Citation> </gmd:thesaurusName> </gmd:MD_Keywords> </gmd:descriptiveKeywords> <gmd:descriptiveKeywords> <gmd:MD_Keywords> <gmd:keyword> <gco:CharacterString>GEOGRAPHIC REGION > GLOBAL</gco:CharacterString> </gmd:keyword> <gmd:type> <gmd:MD_KeywordTypeCode codeList="http://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#MD_KeywordTypeCode" codeListValue="place">place</gmd:MD_KeywordTypeCode> </gmd:type> <gmd:thesaurusName> <gmd:CI_Citation> <gmd:title> <gco:CharacterString>NASA/GCMD Location Keywords</gco:CharacterString> </gmd:title> <gmd:date gco:nilReason="unknown"/> <gmd:citedResponsibleParty xlink:href="#GCMD_USO_ID"/> <gmd:citedResponsibleParty xlink:href="#GCMD_KEYWORDS_ID"/> </gmd:CI_Citation> </gmd:thesaurusName> </gmd:MD_Keywords> </gmd:descriptiveKeywords> <gmd:descriptiveKeywords> <gmd:MD_Keywords> <gmd:keyword> <gco:CharacterString>NASA/NSIDC_DAAC > NASA National Snow and Ice Data Center Distributed Active Archive Center</gco:CharacterString> </gmd:keyword> <gmd:type> <gmd:MD_KeywordTypeCode codeList="http://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#MD_KeywordTypeCode" codeListValue="dataCenter">dataCenter</gmd:MD_KeywordTypeCode> </gmd:type> <gmd:thesaurusName> <gmd:CI_Citation> <gmd:title> <gco:CharacterString>NASA/GCMD Data Center Keywords</gco:CharacterString> </gmd:title> <gmd:date gco:nilReason="unknown"/> <gmd:citedResponsibleParty xlink:href="#GCMD_USO_ID"/> <gmd:citedResponsibleParty xlink:href="#GCMD_KEYWORDS_ID"/> </gmd:CI_Citation> </gmd:thesaurusName> </gmd:MD_Keywords> </gmd:descriptiveKeywords> <gmd:descriptiveKeywords> <gmd:MD_Keywords> <gmd:keyword> <gco:CharacterString>Earth Observation Satellites > NASA Decadal Survey > ICESAT-2 > Ice, Cloud, and land Elevation Satellite-2</gco:CharacterString> </gmd:keyword> <gmd:type> <gmd:MD_KeywordTypeCode codeList="http://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#MD_KeywordTypeCode" codeListValue="platform">platform</gmd:MD_KeywordTypeCode> </gmd:type> <gmd:thesaurusName> <gmd:CI_Citation> <gmd:title> <gco:CharacterString>NASA/GCMD Platform Keywords</gco:CharacterString> </gmd:title> <gmd:date gco:nilReason="unknown"/> <gmd:citedResponsibleParty xlink:href="#GCMD_USO_ID"/> <gmd:citedResponsibleParty xlink:href="#GCMD_KEYWORDS_ID"/> </gmd:CI_Citation> </gmd:thesaurusName> </gmd:MD_Keywords> </gmd:descriptiveKeywords> <gmd:descriptiveKeywords> <gmd:MD_Keywords> <gmd:keyword> <gco:CharacterString>Earth Remote Sensing Instruments > Active Remote Sensing > Altimeters > Lidar/Laser Altimeters > ATLAS > Advanced Topographic Laser Altimeter System</gco:CharacterString> </gmd:keyword> <gmd:type> <gmd:MD_KeywordTypeCode codeList="http://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#MD_KeywordTypeCode" codeListValue="instrument">instrument</gmd:MD_KeywordTypeCode> </gmd:type> <gmd:thesaurusName> <gmd:CI_Citation> <gmd:title> <gco:CharacterString>NASA/GCMD Instrument Keywords</gco:CharacterString> </gmd:title> <gmd:date gco:nilReason="unknown"/> <gmd:citedResponsibleParty xlink:href="#GCMD_USO_ID"/> <gmd:citedResponsibleParty xlink:href="#GCMD_KEYWORDS_ID"/> </gmd:CI_Citation> </gmd:thesaurusName> </gmd:MD_Keywords> </gmd:descriptiveKeywords> <gmd:resourceConstraints> <gmd:MD_Constraints> <gmd:useLimitation> <gco:CharacterString>Cite these data in publications as follows: The data used in this study were produced by the ICESat-2 Science Project Office at NASA/GSFC. The data archive site is the NASA National Snow and Ice Data Center Distributed Active Archive Center.</gco:CharacterString> </gmd:useLimitation> </gmd:MD_Constraints> </gmd:resourceConstraints> <gmd:language> <gco:CharacterString>eng</gco:CharacterString> </gmd:language> <gmd:topicCategory> <gmd:MD_TopicCategoryCode>geoscientificInformation</gmd:MD_TopicCategoryCode> </gmd:topicCategory> <gmd:extent> <gmd:EX_Extent id="boundingExtent"> <gmd:description> <gco:CharacterString>SpatialCoverageType=HORIZONTAL, SpatialGranuleSpatialRepresentation=CARTESIAN, TemporalRangeType=Continuous Range, TimeType=UTC, CoordinateSystem=CARTESIAN</gco:CharacterString> </gmd:description> <gmd:geographicElement> <gmd:EX_GeographicBoundingBox> <!-- ECS extracts WestBoundingCoordinate from here --> <gmd:westBoundLongitude> <gco:Decimal>-180.0</gco:Decimal> </gmd:westBoundLongitude> <!-- ECS extracts EastBoundingCoordinate from here --> <gmd:eastBoundLongitude> <gco:Decimal>180.0</gco:Decimal> </gmd:eastBoundLongitude> <!-- ECS extracts SouthBoundingCoordinate from here --> <gmd:southBoundLatitude> <gco:Decimal>-90.0</gco:Decimal> </gmd:southBoundLatitude> <!-- ECS extracts NorthBoundingCoordinate from here --> <gmd:northBoundLatitude> <gco:Decimal>90.0</gco:Decimal> </gmd:northBoundLatitude> </gmd:EX_GeographicBoundingBox> </gmd:geographicElement> <gmd:temporalElement> <gmd:EX_TemporalExtent> <gmd:extent> <gml:TimePeriod gml:id="TimePeriod_ID_1"> <!-- ECS extracts RangeBeginningDate and RangeBeginningTime from here --> <gml:beginPosition>2005-01-01T00:00:00Z</gml:beginPosition> <!-- ECS extracts RangeEndingDate and RangeEndingTime from here --> <gml:endPosition>2020-12-31T23:59:59Z</gml:endPosition> </gml:TimePeriod> </gmd:extent> </gmd:EX_TemporalExtent> </gmd:temporalElement> </gmd:EX_Extent> </gmd:extent> <gmd:processingLevel> <gmd:MD_Identifier> <gmd:code> <gco:CharacterString>3B</gco:CharacterString> </gmd:code> <gmd:description gco:nilReason="missing"/> </gmd:MD_Identifier> </gmd:processingLevel> </gmd:MD_DataIdentification> </gmd:identificationInfo> <gmd:contentInfo> <gmd:MD_ImageDescription> <gmd:attributeDescription gco:nilReason="missing"/> <gmd:contentType gco:nilReason="missing"/> <gmd:processingLevelCode> <gmd:MD_Identifier> <gmd:code> <gco:CharacterString>3B</gco:CharacterString> </gmd:code> <gmd:description gco:nilReason="missing"/> </gmd:MD_Identifier> </gmd:processingLevelCode> </gmd:MD_ImageDescription> </gmd:contentInfo> <gmd:distributionInfo> <gmd:MD_Distribution> <gmd:distributionFormat> <gmd:MD_Format> <gmd:name> <gco:CharacterString>HDF</gco:CharacterString> </gmd:name> <gmd:version> <gco:CharacterString>5</gco:CharacterString> </gmd:version> </gmd:MD_Format> </gmd:distributionFormat> <gmd:distributor> <gmd:MD_Distributor> <gmd:distributorContact> <gmd:CI_ResponsibleParty> <gmd:organisationName> <gco:CharacterString>NSIDC DAAC > NASA National Snow and Ice Data Center Distributed Active Archive Center</gco:CharacterString> </gmd:organisationName> <gmd:contactInfo xlink:href="#NSIDC_DAAC_CONTACT_ID"/> <gmd:role> <gmd:CI_RoleCode codeList="http://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#CI_RoleCode" codeListValue="distributor">distributor</gmd:CI_RoleCode> </gmd:role> </gmd:CI_ResponsibleParty> </gmd:distributorContact> <gmd:distributorTransferOptions> <gmd:MD_DigitalTransferOptions> <gmd:onLine> <gmd:CI_OnlineResource> <gmd:linkage> <gmd:URL>http://nsidc.org/data/icesat2/data.html</gmd:URL> </gmd:linkage> <gmd:protocol> <gco:CharacterString>https</gco:CharacterString> </gmd:protocol> <gmd:description> <gco:CharacterString>Data Product Description Page</gco:CharacterString> </gmd:description> <gmd:function> <gmd:CI_OnLineFunctionCode codeList="http://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode" codeListValue="information">information</gmd:CI_OnLineFunctionCode> </gmd:function> </gmd:CI_OnlineResource> </gmd:onLine> <gmd:onLine> <gmd:CI_OnlineResource> <gmd:linkage> <gmd:URL>http://nsidc.org/data/icesat2/order.html</gmd:URL> </gmd:linkage> <gmd:protocol> <gco:CharacterString>https</gco:CharacterString> </gmd:protocol> <gmd:description> <gco:CharacterString>Data Product Order Page</gco:CharacterString> </gmd:description> <gmd:function> <gmd:CI_OnLineFunctionCode codeList="http://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode" codeListValue="order">order</gmd:CI_OnLineFunctionCode> </gmd:function> </gmd:CI_OnlineResource> </gmd:onLine> <gmd:onLine> <gmd:CI_OnlineResource> <gmd:linkage> <gmd:URL>https://doi.org/10.5067/ATLAS/ATL16.003</gmd:URL> </gmd:linkage> <gmd:protocol> <gco:CharacterString>https</gco:CharacterString> </gmd:protocol> <gmd:description> <gco:CharacterString>Digital Object Identifier URL</gco:CharacterString> </gmd:description> <gmd:function> <gmd:CI_OnLineFunctionCode codeList="http://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode" codeListValue="information">information</gmd:CI_OnLineFunctionCode> </gmd:function> </gmd:CI_OnlineResource> </gmd:onLine> </gmd:MD_DigitalTransferOptions> </gmd:distributorTransferOptions> </gmd:MD_Distributor> </gmd:distributor> </gmd:MD_Distribution> </gmd:distributionInfo> <gmi:acquisitionInformation> <gmi:MI_AcquisitionInformation> <gmi:instrument> <eos:EOS_Instrument id="ATLAS_INSTRUMENT_ID"> <gmi:citation> <gmd:CI_Citation> <gmd:title> <gco:CharacterString>ATLAS > Advanced Topographic Laser Altimeter System</gco:CharacterString> </gmd:title> <gmd:date gco:nilReason="unknown"/> </gmd:CI_Citation> </gmi:citation> <gmi:identifier> <gmd:MD_Identifier> <gmd:code> <gco:CharacterString>ATLAS</gco:CharacterString> </gmd:code> <gmd:description> <gco:CharacterString>Advanced Topographic Laser Altimeter System</gco:CharacterString> </gmd:description> </gmd:MD_Identifier> </gmi:identifier> <gmi:type> <gco:CharacterString>Laser Altimeter</gco:CharacterString> </gmi:type> <gmi:description> <gco:CharacterString>ATLAS on ICESat-2 determines the range between the satellite and the Earth's surface by measuring the two-way time delay of short pulses of laser light that it transmits in six beams. It is different from previous operational ice-sheet altimeters in that it is a photon-counting LIDAR. ATLAS records a set of arrival times for individual photons, which are then analyzed to derive surface, vegetation, and cloud properties. ATLAS has six beams arranged in three pairs, so that it samples each of three reference pair tracks with a pair of beams; ATLAS transmits pulses at 10 kHz, giving approximately one pulse every 0.7 m along track; ATLAS's expected pointing control will be better than 90 m RMS.</gco:CharacterString> </gmi:description> <gmi:mountedOn xlink:href="#ICESAT_2_PLATFORM_ID"/> </eos:EOS_Instrument> </gmi:instrument> <gmi:operation> <!-- MI_Operation is expected to be here by the Base Reference Metadata Model document--> <gmi:MI_Operation> <gmi:description> <gco:CharacterString>ICESat-2 > Ice, Cloud, and land Elevation Satellite-2</gco:CharacterString> </gmi:description> <gmi:citation> <gmd:CI_Citation> <gmd:title> <gco:CharacterString>ICESat-2 > Ice, Cloud, and land Elevation Satellite-2</gco:CharacterString> </gmd:title> <gmd:date gco:nilReason="unknown"/> </gmd:CI_Citation> </gmi:citation> <gmi:identifier> <gmd:MD_Identifier> <gmd:code> <gco:CharacterString>ICESat-2</gco:CharacterString> </gmd:code> <gmd:description> <gco:CharacterString>Ice, Cloud, and land Elevation Satellite-2</gco:CharacterString> </gmd:description> </gmd:MD_Identifier> </gmi:identifier> <gmi:status> <gmd:MD_ProgressCode codeList="http://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#MD_ProgressCode" codeListValue="underDevelopment">underDevelopment</gmd:MD_ProgressCode> </gmi:status> <gmi:parentOperation gco:nilReason="inapplicable"/> <gmi:platform xlink:href="#ICESAT_2_PLATFORM_ID"/> </gmi:MI_Operation> </gmi:operation> <gmi:platform> <eos:EOS_Platform id="ICESAT_2_PLATFORM_ID"> <gmi:citation> <gmd:CI_Citation> <gmd:title> <gco:CharacterString>ICESat-2 > Ice, Cloud, and land Elevation Satellite-2</gco:CharacterString> </gmd:title> <gmd:date gco:nilReason="unknown"/> </gmd:CI_Citation> </gmi:citation> <gmi:identifier> <gmd:MD_Identifier> <gmd:code> <gco:CharacterString>ICESat-2</gco:CharacterString> </gmd:code> <gmd:description> <gco:CharacterString>Ice, Cloud, and land Elevation Satellite-2</gco:CharacterString> </gmd:description> </gmd:MD_Identifier> </gmi:identifier> <gmi:description> <gco:CharacterString>Spacecraft</gco:CharacterString> </gmi:description> <gmi:instrument xlink:href="#ATLAS_INSTRUMENT_ID"/> </eos:EOS_Platform> </gmi:platform> </gmi:MI_AcquisitionInformation> </gmi:acquisitionInformation> </gmi:MI_Metadata> </gmd:seriesMetadata> </gmd:DS_Series> (Type is String) fullnamepath: /METADATA (Type is String) METADATA_AcquisitionInformation: (Type is Container) METADATA_AcquisitionInformation_lidar pulse_rate: 10000 pps (Type is String) wavelength: 532 nm (Type is String) identifier: ATLAS (Type is String) type: Laser Altimeter (Type is String) description: ATLAS on ICESat-2 determines the range between the satellite and the Earth's surface by measuring the two-way time delay of short pulses of laser light that it transmits in six beams. It is different from previous operational ice-sheet altimeters in that it is a photon-counting LIDAR. ATLAS records a set of arrival times for individual photons, which are then analyzed to derive surface, vegetation, and cloud properties. ATLAS has six beams arranged in three pairs, so that it samples each of three reference pair tracks with a pair of beams; ATLAS transmits pulses at 10 kHz, giving approximately one pulse every 0.7 m along track; ATLAS's expected pointing control will be better than 90 m RMS. (Type is String) fullnamepath: /METADATA/AcquisitionInformation/lidar (Type is String) METADATA_AcquisitionInformation_lidarDocument edition: Pre-Release (Type is String) publicationDate: 12/31/17 (Type is String) title: A document describing the ATLAS instrument will be provided by the ICESat-2 Project Science Office. (Type is String) fullnamepath: /METADATA/AcquisitionInformation/lidarDocument (Type is String) METADATA_AcquisitionInformation_platform identifier: ICESat-2 (Type is String) description: Ice, Cloud, and land Elevation Satellite-2 (Type is String) type: Spacecraft (Type is String) fullnamepath: /METADATA/AcquisitionInformation/platform (Type is String) METADATA_AcquisitionInformation_platformDocument edition: 31-Dec-16 (Type is String) publicationDate: 31-Dec-16 (Type is String) title: The Ice, Cloud, and land Elevation Satellite-2 (ICESat-2): Science requirements, concept, and implementation. Thorsten Markus, Tom Neumann, Anthony Martino, Waleed Abdalati, Kelly Brunt, Beata Csatho, Sinead Farrell, Helen Fricker, Alex Gardner, David Harding, Michael Jasinski, Ron Kwok, Lori Magruder, Dan Lubin, Scott Luthcke, James Morison, Ross Nelson, Amy Neuenschwander, Stephen Palm, Sorin Popescu, CK Shum, Bob E. Schutz, Benjamin Smith, Yuekui Yang, Jay Zwally. http://dx.doi.org/10.1016/j.rse.2016.12.029 (Type is String) fullnamepath: /METADATA/AcquisitionInformation/platformDocument (Type is String) METADATA_DataQuality scope: NOT_SET (Type is String) fullnamepath: /METADATA/DataQuality (Type is String) METADATA_DataQuality_CompletenessOmission evaluationMethodType: directInternal (Type is String) measureDescription: TBD (Type is String) nameOfMeasure: TBD (Type is String) unitofMeasure: TBD (Type is String) value: NOT_SET (Type is String) fullnamepath: /METADATA/DataQuality/CompletenessOmission (Type is String) METADATA_DataQuality_DomainConsistency evaluationMethodType: directInternal (Type is String) measureDescription: TBD (Type is String) nameOfMeasure: TBD (Type is String) unitofMeasure: TBD (Type is String) value: NOT_SET (Type is String) fullnamepath: /METADATA/DataQuality/DomainConsistency (Type is String) METADATA_ProductSpecificationDocument ShortName: ATL16_SDP (Type is String) characterSet: utf8 (Type is String) edition: v1.2 (Type is String) language: eng (Type is String) publicationDate: Aug 2020 (Type is String) title: ICESat-2-SIPS-SPEC-xxx - ATLAS Science Algorithm Standard Data Product (SDP) Volume x (ATL16). (Type is String) fullnamepath: /METADATA/ProductSpecificationDocument (Type is String) METADATA_SeriesIdentification maintenanceAndUpdateFrequency: asNeeded (Type is String) maintenanceDate: SET_BY_META (Type is String) VersionID: 003 (Type is String) language: eng (Type is String) characterSet: utf8 (Type is String) pointOfContact: NSIDC DAAC > NASA National Snow and Ice Data Center Distributed Active Archive Center (Type is String) longName: ATLAS/ICESat-2 L3B Weekly Gridded Atmosphere (Type is String) shortName: ATL16 (Type is String) identifier_product_DOI: doi:10.5067/ATLAS/ATL16.003 (Type is String) revisionDate: 2016-06-09 (Type is String) resourceProviderOrganizationName: National Aeronautics and Space Administration (NASA) (Type is String) abstract: The ICESat-2 ATL16 standard data product reports weekly global cloud fraction, total column optical depth over the oceans, polar cloud fraction, blowing snow frequency, apparent surface reflectivity, and ground detection frequency. (Type is String) purpose: The purpose of ATL16 is to provide a gridded summary of weekly global cloud fraction, total column optical depth over the oceans, polar cloud fraction, blowing snow frequency, apparent surface reflectivity, and ground detection frequency. (Type is String) credit: The software that generates the ATL16 product was designed and implemented within the ICESat-2 Science Investigator-led Processing System at the NASA Goddard Space Flight Center in Greenbelt, Maryland. (Type is String) status: onGoing (Type is String) format: HDF (Type is String) formatVersion: 5 (Type is String) topicCategory: geoscientificInformation (Type is String) mission: ICESat-2 > Ice, Cloud, and land Elevation Satellite-2 (Type is String) fullnamepath: /METADATA/SeriesIdentification (Type is String) METADATA_DatasetIdentification spatialRepresentationType: gridded (Type is String) creationDate: 2021-03-29T15:24:21.000000Z (Type is String) uuid: 7f49ee23-1598-3c2e-a85b-ffc11eb960c8 (Type is String) fileName: ATL16_20210101010136_01231001_003_01.h5 (Type is String) VersionID: 003 (Type is String) language: eng (Type is String) characterSet: utf8 (Type is String) shortName: ATL16 (Type is String) originatorOrganizationName: GSFC I-SIPS > ICESat-2 Science Investigator-led Processing System (Type is String) abstract: The ICESat-2 ATL16 standard data product reports weekly global cloud fraction, total column optical depth over the oceans, polar cloud fraction, blowing snow frequency, apparent surface reflectivity, and ground detection frequency. (Type is String) purpose: The purpose of ATL16 is to provide a gridded summary of weekly global cloud fraction, total column optical depth over the oceans, polar cloud fraction, blowing snow frequency, apparent surface reflectivity, and ground detection frequency. (Type is String) credit: The software that generates the ATL16 product was designed and implemented within the ICESat-2 Science Investigator-led Processing System at the NASA Goddard Space Flight Center in Greenbelt, Maryland. (Type is String) status: onGoing (Type is String) topicCategory: geoscientificInformation (Type is String) fullnamepath: /METADATA/DatasetIdentification (Type is String) METADATA_Extent northBoundLatitude: 88.039431555734595 (Type is Float64) eastBoundLongitude: 179.99998754573636 (Type is Float64) southBoundLatitude: -88.051831869451448 (Type is Float64) westBoundLongitude: -179.99999937257695 (Type is Float64) rangeBeginningDateTime: 2021-01-01T01:04:13.063112Z (Type is String) rangeEndingDateTime: 2021-01-08T01:10:35.557668Z (Type is String) fullnamepath: /METADATA/Extent (Type is String) METADATA_QADatasetIdentification abstract: An ASCII product that contains statistical information on data product results. These statistics enable data producers and users to assess the quality of the data in the data product granule (Type is String) creationDate: 2021-03-29T15:29:23.000000Z (Type is String) fileName: ATL16_20210101010136_01231001_003_01.qa (Type is String) fullnamepath: /METADATA/QADatasetIdentification (Type is String) METADATA_Lineage: (Type is Container) METADATA_Lineage_ANC25_16 description: HDF5 template file that defines the organization and default content of the product. (Type is String) fileName: atl16_template.h5 (Type is String) shortName: ANC25-16 (Type is String) uuid: 7835adb4-8a84-3676-a156-c0e957406471 (Type is String) version: 012 (Type is String) fullnamepath: /METADATA/Lineage/ANC25-16 (Type is String) METADATA_Lineage_ANC26_16 description: HDF5 template file that defines the organization and default content of the product metadata. (Type is String) fileName: atl16_metadata_template.h5 (Type is String) shortName: ANC26-16 (Type is String) uuid: 6c7e6a68-23d1-373c-90f1-2a6b3f9aa7f1 (Type is String) version: 012 (Type is String) fullnamepath: /METADATA/Lineage/ANC26-16 (Type is String) METADATA_Lineage_ANC36_16 description: ISO 19139 XML file containing Series-level metadata information. (Type is String) fileName: ANC36-16_20210107160638_003_01.xml (Type is String) shortName: ANC36-16 (Type is String) uuid: 0533aadb-cff1-3a14-9eaa-499b1326a2f7 (Type is String) version: 003 (Type is String) fullnamepath: /METADATA/Lineage/ANC36-16 (Type is String) METADATA_Lineage_ANC38_16 description: ISO 19139 XML file containing DataSet-level metadata information. (Type is String) fileName: ANC38-16_20210107160644_003_01.xml (Type is String) shortName: ANC38-16 (Type is String) uuid: 49b397b4-8d04-34ca-81b0-3e55944f3994 (Type is String) version: 003 (Type is String) fullnamepath: /METADATA/Lineage/ANC38-16 (Type is String) METADATA_Lineage_ATL09 description: ICESat-2 ATLAS L3A Atmosphere data products. 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f51a9029-d719-36d8-8912-606a0e8c8a73, d8be5417-da82-3986-8084-d44d38f92321, 38f5adf4-6509-3d89-acb8-a4d46258399d, d6194e3a-3d6d-3812-bc23-54f661fb2cf1, ac793c89-1bd1-3ba8-a230-0dda66d38cc5, 7dcd45e9-0daa-3a55-baf2-aa1e83a0c072, 4d4c16d8-ea01-37ef-ac0c-20856fb94934, c0611ead-2d74-352c-9f2d-e23930fe08ea, a72c8511-5ca3-3c86-a0c5-05990f873813, 17cc5d2c-597c-3467-9b38-00ca1014cfe5, 3bd2a4ef-a69f-3fc6-975f-9303b5d82383, 0205ad30-28b6-35cf-a6f4-b66eceedbbf7, 432d0016-eb35-3237-9375-85c3b1ff115f (Type is String) version: 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004, 004 (Type is String) start_cycle: 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10 (Type is Int32) end_cycle: 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10 (Type is Int32) start_orbit: 12807, 12808, 12809, 12810, 12811, 12812, 12813, 12814, 12815, 12816, 12817, 12818, 12819, 12820, 12821, 12822, 12823, 12824, 12825, 12826, 12827, 12828, 12829, 12830, 12831, 12832, 12833, 12834, 12835, 12836, 12837, 12838, 12839, 12840, 12841, 12842, 12843, 12844, 12845, 12846, 12847, 12848, 12849, 12850, 12851, 12852, 12853, 12854, 12855, 12856, 12857, 12858, 12859, 12860, 12861, 12862, 12863, 12864, 12865, 12866, 12867, 12868, 12869, 12870, 12871, 12872, 12873, 12874, 12875, 12876, 12877, 12878, 12879, 12880, 12881, 12882, 12883, 12884, 12885, 12886, 12887, 12888, 12889, 12890, 12891, 12892, 12893, 12894, 12895, 12896, 12897, 12898, 12899, 12900, 12901, 12902, 12903, 12904, 12905, 12906, 12907, 12908, 12909, 12910, 12911, 12912, 12913 (Type is Int32) end_orbit: 12807, 12808, 12809, 12810, 12811, 12812, 12813, 12814, 12815, 12816, 12817, 12818, 12819, 12820, 12821, 12822, 12823, 12824, 12825, 12826, 12827, 12828, 12829, 12830, 12831, 12832, 12833, 12834, 12835, 12836, 12837, 12838, 12839, 12840, 12841, 12842, 12843, 12844, 12845, 12846, 12847, 12848, 12849, 12850, 12851, 12852, 12853, 12854, 12855, 12856, 12857, 12858, 12859, 12860, 12861, 12862, 12863, 12864, 12865, 12866, 12867, 12868, 12869, 12870, 12871, 12872, 12873, 12874, 12875, 12876, 12877, 12878, 12879, 12880, 12881, 12882, 12883, 12884, 12885, 12886, 12887, 12888, 12889, 12890, 12891, 12892, 12893, 12894, 12895, 12896, 12897, 12898, 12899, 12900, 12901, 12902, 12903, 12904, 12905, 12906, 12907, 12908, 12909, 12910, 12911, 12912, 12913 (Type is Int32) start_rgt: 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228, 229 (Type is Int32) end_rgt: 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228, 229 (Type is Int32) start_region: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 (Type is Int32) end_region: 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14 (Type is Int32) fullnamepath: /METADATA/Lineage/ATL09 (Type is String) METADATA_Lineage_ANC19 description: TAI to UTC leapsecond file retrieved from ftp://maia.usno.navy.mil/ser7/tai-utc.dat (Type is String) fileName: tai_utc_2017.dat (Type is String) shortName: ANC19 (Type is String) uuid: 7c66d365-278a-31f7-8fe4-9c80e2f012e5 (Type is String) version: 001 (Type is String) fullnamepath: /METADATA/Lineage/ANC19 (Type is String) METADATA_Lineage_Control description: Text-based keyword=value file generated automatically within the ICESat-2 data system that specifies all of the conditions required for each individual run of the software. (Type is String) fileName: CTL_atl16_006801679.ctl (Type is String) shortName: CNTL (Type is String) version: 1 (Type is String) fullnamepath: /METADATA/Lineage/Control (Type is String) METADATA_ProcessStep: (Type is Container) METADATA_ProcessStep_Browse processDescription: Browse processing is performed for each granule SIPS produces. The browse utility reads data from the granule and produces browse images as defined in the respective product ATBD. The utility then embeds each browse image into the product within the /Browse group. (Type is String) identifier: atlas_brw (Type is String) softwareVersion: Version 2.4.1 (Type is String) softwareDate: Jan 14 2021 (Type is String) softwareTitle: Creates ATLAS HDF5 browse files (Type is String) runTimeParameters: CTL_atl16_006801679.ctl (Type is String) stepDateTime: 2021-03-29T15:29:23.000000Z (Type is String) fullnamepath: /METADATA/ProcessStep/Browse (Type is String) METADATA_ProcessStep_Metadata identifier: atlas_meta (Type is String) softwareVersion: Version 4.4.1 (Type is String) softwareDate: Jan 14 2021 (Type is String) softwareTitle: Creates ATLAS XML metadata files (Type is String) runTimeParameters: CTL_atl16_006801679.ctl (Type is String) stepDateTime: 2021-03-29T15:29:35.000000Z (Type is String) fullnamepath: /METADATA/ProcessStep/Metadata (Type is String) METADATA_ProcessStep_PGE ATBDDate: August 12, 2020 (Type is String) ATBDTitle: ICESat-2 Algorithm Theoretical Basis Document for Atmosphere Gridded Products (Type is String) ATBDVersion: V3.1 [Interim] (Type is String) documentDate: Aug 2020 (Type is String) documentation: ATLAS Science Algorithm Software Design Description (SDD) - Volume 18 (atlas_l3b_atm) (Type is String) processDescription: Computes gridded atmosphere products. (Type is String) identifier: atlas_l3b_atm (Type is String) softwareVersion: Version 1.2 (Type is String) softwareDate: Oct 29 2020 (Type is String) softwareTitle: ASAS L3B ATM PGE (Type is String) runTimeParameters: CTL_atl16_006801679.ctl (Type is String) stepDateTime: 2021-03-29T15:24:21.000000Z (Type is String) fullnamepath: /METADATA/ProcessStep/PGE (Type is String) METADATA_ProcessStep_QA processDescription: QA processing is performed by an external utility on each granule produced by SIPS. The utility reads the granule, performs both generic and product-specific quality-assessment calculations, and writes a text-based quality assessment report. The name and creation data of this report are identified within the QADatasetIdentification metadata (Type is String) identifier: atl16_qa_util (Type is String) softwareVersion: Version 1.2 (Type is String) softwareDate: Oct 29 2020 (Type is String) softwareTitle: ATL16 QA Utility (Type is String) runTimeParameters: CTL_atl16_006801679.ctl (Type is String) stepDateTime: 2021-03-29T15:29:23.000000Z (Type is String) fullnamepath: /METADATA/ProcessStep/QA (Type is String) quality_assessment Description: Contains quality assessment data. This may include QA counters, QA along-track data and/or QA summary data. Also contains atmosphere gridded parameter statistical data. (Type is String) fullnamepath: /quality_assessment (Type is String) quality_assessment_atmosphere Description: Contains statistical parameters (including minimum, maximum, mean, and standard deviation) for each atmosphere gridded parameter. (Type is String) fullnamepath: /quality_assessment/atmosphere (Type is String) ancillary_data Description: Contains information ancillary to the data product. This may include product characteristics, instrument characteristics and/or processing constants. (Type is String) data_rate: Data within this group pertain to the granule in its entirety. (Type is String) fullnamepath: /ancillary_data (Type is String) ancillary_data_atmosphere Description: Contains general ancillary and processing control parameters. (Type is String) data_rate: Data within this group pertain to the granule in its entirety. (Type is String) fullnamepath: /ancillary_data/atmosphere (Type is String) DODS_EXTRA Unlimited_Dimension: global_grid_lat global_grid_lon npolar_grid_lat npolar_grid_lon orbit_info_crossing_time orbit_info_sc_orient_time spolar_grid_lat spolar_grid_lon (Type is String)

Global Dimensions	View/Hide [ /global_grid_lat = 0..59 ] [ /global_grid_lon = 0..119 ] [ /npolar_grid_lat = 0..29 ] [ /npolar_grid_lon = 0..119 ] [ /orbit_info_crossing_time = 0..106 ] [ /orbit_info_sc_orient_time = 0..0 ] [ /spolar_grid_lat = 0..29 ] [ /spolar_grid_lon = 0..119 ] [ /FakeDim0 = 0..0 ] [ /FakeDim1 = 0..723 ] [ /FakeDim2 = 0..1026 ] [ /FakeDim3 = 0..2 ] [ /FakeDim4 = 0..637 ] [ /FakeDim5 = 0..561 ]

Variables	global_grid_lat[ /global_grid_lat= 0..59] (Type is Float64) attributes long_name: global grid latitude (Type is String) standard_name: latitude (Type is String) units: degrees_north (Type is String) source: L3B ATM ATBD, Section 2.0, Section 5.0, Table 5. (Type is String) valid_min: -90.000000000000000 (Type is Float64) valid_max: 90.000000000000000 (Type is Float64) contentType: referenceInformation (Type is String) description: The global grid latitude one-dimensional array parameter, with the latitudes applicable to each global grid cell. ATL09 ATM histogram top latitude (latitude ()) derived from the ATM range window geolocation. Based on WGS84 Earth-centered, Earth-fixed terrestrial reference system and geodetic data. Direction: North=+ values. Range of latitude values: -90.0 to +90.0 degrees, with a step size of global_grid_lat_scale. Grid array organization: global_grid_lat (j), where j=latitude index, as per ATBD Section 2.0. Given weekly global_grid_lat_scale = 3.0 degrees, array dimension: global_grid_lat (60), type: double precision. Comprises the y-grid axis for global gridded parameters. Reference: global_grid_lat (1) = -90.0 degrees, at the lower left corner of a global gridded parameter cell location (i,j) = (1,1). (Type is String) coordinates: global_grid_lat (Type is String) origname: global_grid_lat (Type is String) fullnamepath: /global_grid_lat (Type is String) global_grid_lon[ /global_grid_lon= 0..119] (Type is Float64) attributes long_name: global grid longitude (Type is String) standard_name: longitude (Type is String) units: degrees_east (Type is String) source: L3B ATM ATBD, Section 2.0, Section 5.0, Table 5. (Type is String) valid_min: -180.00000000000000 (Type is Float64) valid_max: 180.00000000000000 (Type is Float64) contentType: referenceInformation (Type is String) description: The global grid longitude one-dimensional array parameter, with the longitudes applicable to each global grid cell. The ATL09 ATM histogram top longitude (longitude()) derived from the ATM range window geolocation. Based on WGS84 Earth-centered, Earth-fixed terrestrial reference system and geodetic data. Direction: East=+ values. Range of longitude values: -180.0 to +180.0 degrees, with a step size of global_grid_lon_scale. Grid array organization: global_grid_lon (i), where i=longitude index, as per ATBD Section 2.0. Given weekly global_grid_lon_scale = 3.0 degrees, array dimension: global_grid_lon (120), type: double precision. Comprises the x-grid axis for global gridded parameters. Reference: global_grid_lon (1) = -180.0 degrees, at the lower left corner of a global gridded parameter cell location (i,j) = (1,1). (Type is String) coordinates: global_grid_lon (Type is String) origname: global_grid_lon (Type is String) fullnamepath: /global_grid_lon (Type is String) npolar_grid_lat[ /npolar_grid_lat= 0..29] (Type is Float64) attributes long_name: north polar grid latitude (Type is String) standard_name: latitude (Type is String) units: degrees_north (Type is String) source: L3B ATM ATBD, Section 2.0, Section 5.0, Table 5. (Type is String) valid_min: 60.000000000000000 (Type is Float64) valid_max: 90.000000000000000 (Type is Float64) contentType: referenceInformation (Type is String) description: The north polar grid latitude one-dimensional array parameter, with the latitudes applicable to each north polar grid cell. ATL09 ATM histogram top latitude (latitude ()) derived from the ATM range window geolocation. Based on WGS84 Earth-centered, Earth-fixed terrestrial reference system and geodetic data. Direction: North=+ values. Range of latitude values: +90.0 down to +60.0 degrees, with a step size of polar_grid_lat_scale. Grid array organization: npolar_grid_lat (j), where j=latitude index, as per ATBD Section 2.0. Given weekly polar_grid_lat_scale = 1.0 degrees, the weekly array dimension is: npolar_grid_lat (30), type: double precision. Comprises the y-grid axis for north polar gridded parameters. Reference: npolar_grid_lat (1) = +90.0 degrees, at the upper left corner of a north polar gridded parameter cell location (i,j) = (1,1). (Type is String) coordinates: npolar_grid_lat (Type is String) origname: npolar_grid_lat (Type is String) fullnamepath: /npolar_grid_lat (Type is String) npolar_grid_lon[ /npolar_grid_lon= 0..119] (Type is Float64) attributes long_name: north polar grid longitude (Type is String) standard_name: longitude (Type is String) units: degrees_east (Type is String) source: L3B ATM ATBD, Section 2.0, Section 5.0, Table 5. (Type is String) valid_min: -180.00000000000000 (Type is Float64) valid_max: 180.00000000000000 (Type is Float64) contentType: referenceInformation (Type is String) description: The north polar grid longitude one-dimensional array parameter, with the longitudes applicable to each north polar grid cell. ATL09 ATM histogram top longitude (longitude ()) derived from the ATM range window geolocation. Based on WGS84 Earth-centered, Earth-fixed terrestrial reference system and geodetic data. Direction: East=+ values. Range of longitude values: -180.0 to +180.0 degrees, with a step size of polar_grid_lon_scale. Grid array organization: npolar_grid_lon (i), where i=longitude index, as per ATBD Section 2.0. Given weekly polar_grid_lon_scale = 3.0 degrees, the weekly array dimension is: npolar_grid_lon (120), type: double precision. Comprises the x-grid axis for north polar gridded parameters. Reference: npolar_grid_lon (1) = -180.0 degrees, at the upper left corner of a north polar gridded parameter cell location (i,j) = (1,1). (Type is String) coordinates: npolar_grid_lon (Type is String) origname: npolar_grid_lon (Type is String) fullnamepath: /npolar_grid_lon (Type is String) orbit_info_crossing_time[ /orbit_info_crossing_time= 0..106] (Type is Float64) attributes long_name: Ascending Node Crossing Time (Type is String) standard_name: time (Type is String) units: seconds since 2018-01-01 (Type is String) source: POD/PPD (Type is String) contentType: referenceInformation (Type is String) description: The time, in seconds since the ATLAS SDP GPS Epoch, at which the ascending node crosses the equator. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. Type: double precision. (Type is String) origname: crossing_time (Type is String) fullnamepath: /orbit_info/crossing_time (Type is String) orbit_info_sc_orient_time[ /orbit_info_sc_orient_time= 0..0] (Type is Float64) attributes long_name: Time of Last Spacecraft Orientation Change (Type is String) standard_name: time (Type is String) units: seconds since 2018-01-01 (Type is String) source: POD/PPD (Type is String) contentType: referenceInformation (Type is String) description: The time of the last spacecraft orientation change between forward, backward and transitional flight modes, expressed in seconds since the ATLAS SDP GPS Epoch. ICESat-2 is considered to be flying forward when the weak beams are leading the strong beams; and backward when the strong beams are leading the weak beams. ICESat-2 is considered to be in transition while it is maneuvering between the two orientations. Science quality is potentially degraded while in transition mode. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. Type: double precision. (Type is String) origname: sc_orient_time (Type is String) fullnamepath: /orbit_info/sc_orient_time (Type is String) spolar_grid_lat[ /spolar_grid_lat= 0..29] (Type is Float64) attributes long_name: south polar grid latitude (Type is String) standard_name: latitude (Type is String) units: degrees_north (Type is String) source: L3B ATM ATBD, Section 2.0, Section 5.0, Table 5. (Type is String) valid_min: -90.000000000000000 (Type is Float64) valid_max: -60.000000000000000 (Type is Float64) contentType: referenceInformation (Type is String) description: The south polar grid latitude one-dimensional array parameter, with the latitudes applicable to each south polar grid cell. ATL09 ATM histogram top latitude (latitude ()) derived from the ATM range window geolocation. Based on WGS84 Earth-centered, Earth-fixed terrestrial reference system and geodetic data. Direction: South=- values. Range of latitude values: -90.0 up to -60.0 degrees, with a step size of polar_grid_lat_scale. Grid array organization: spolar_grid_lat (j), where j=latitude index, as per ATBD Section 2.0. Given weekly polar_grid_lat_scale = 1.0 degrees, the weekly array dimension is: spolar_grid_lat (30), type: double precision. Comprises the y-grid axis for south polar gridded parameters. Reference: spolar_grid_lat (1) = -90.0 degrees, at the lower left corner of a south polar gridded parameter cell location (i,j) = (1,1). (Type is String) coordinates: spolar_grid_lat (Type is String) origname: spolar_grid_lat (Type is String) fullnamepath: /spolar_grid_lat (Type is String) spolar_grid_lon[ /spolar_grid_lon= 0..119] (Type is Float64) attributes long_name: south polar grid longitude (Type is String) standard_name: longitude (Type is String) units: degrees_east (Type is String) source: L3B ATM ATBD, Section 2.0, Section 5.0, Table 5. (Type is String) valid_min: -180.00000000000000 (Type is Float64) valid_max: 180.00000000000000 (Type is Float64) contentType: referenceInformation (Type is String) description: The south polar grid longitude one-dimensional array parameter, with the longitudes applicable to each south polar grid cell. ATL09 ATM histogram top longitude (longitude ()) derived from the ATM range window geolocation. Based on WGS84 Earth-centered, Earth-fixed terrestrial reference system and geodetic data. Direction: East=+ values. Range of longitude values: -180.0 to +180.0 degrees, with a step size of polar_grid_lon_scale. Grid array organization: spolar_grid_lon (i), where i=longitude index, as per ATBD Section 2.0. Given weekly polar_grid_lon_scale = 3.0 degrees, the weekly array dimension is: spolar_grid_lon (120), type: double precision. Comprises the x-grid axis for south polar gridded parameters. Reference: spolar_grid_lon (1) = -180.0 degrees, at the lower left corner of a south polar gridded parameter cell location (i,j) = (1,1). (Type is String) coordinates: spolar_grid_lon (Type is String) origname: spolar_grid_lon (Type is String) fullnamepath: /spolar_grid_lon (Type is String) FakeDim0[ /FakeDim0= 0..0] (Type is Int32) attributes units: level (Type is String) FakeDim1[ /FakeDim1= 0..723] (Type is Int32) attributes units: level (Type is String) FakeDim2[ /FakeDim2= 0..1026] (Type is Int32) attributes units: level (Type is String) FakeDim3[ /FakeDim3= 0..2] (Type is Int32) attributes units: level (Type is String) FakeDim4[ /FakeDim4= 0..637] (Type is Int32) attributes units: level (Type is String) FakeDim5[ /FakeDim5= 0..561] (Type is Int32) attributes units: level (Type is String) delta_time_end[ /FakeDim0= 0..0] (Type is Float64) attributes long_name: end time (Type is String) standard_name: time (Type is String) units: seconds since 2018-01-01 (Type is String) source: L3B ATM ATBD, Section 5.0, Table 5. (Type is String) contentType: auxiliaryInformation (Type is String) description: The end time scalar parameter (end_time). The end time/date of the data used to make the product. Number of GPS seconds since the ATLAS SDP epoch at the end of the data collection. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. Type: double precision. (Type is String) origname: delta_time_end (Type is String) fullnamepath: /delta_time_end (Type is String) npolar_grnd_detect[ /npolar_grid_lat= 0..29] [ /npolar_grid_lon= 0..119] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) long_name: North Polar Ground Detection Frequency (fraction) (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.6, Section 5.0, Table 5. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: modelResult (Type is String) description: The north polar ground detection frequency two-dimensional atmospheric gridded parameter. For each north polar grid cell this represents the number of detected surface signal 25 Hz (high-rate profile) observations (surface_sig () > 0.0) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded north polar ground detection values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The calculation results in a fractional value. The ATL09 required detected surface signal (surface_sig ()) is determined from the surface signal count of the number of photons in the detected surface bin in the L3A ATM high-rate profile processing. Grid array organization: npolar_grnd_detect (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the weekly gridded array dimension is: npolar_grnd_detect (120,30), type: floating point. Reference: npolar_grnd_detect (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "npolar_grnd_detect_img" in the ATL16 product. The applicable north polar observation counts for this atmosphere gridded parameter are available from: npolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. (Type is String) coordinates: npolar_grid_lon npolar_grid_lat (Type is String) origname: npolar_grnd_detect (Type is String) fullnamepath: /npolar_grnd_detect (Type is String) orbit_info_cycle_number[ /orbit_info_crossing_time= 0..106] (Type is Int8) attributes long_name: Cycle Number (Type is String) units: 1 (Type is String) valid_min: 0 (Type is Int8) valid_max: 50 (Type is Int8) contentType: referenceInformation (Type is String) description: A count of the number of exact repeats of this reference orbit. Type: integer1. (Type is String) source: Operations (Type is String) origname: cycle_number (Type is String) fullnamepath: /orbit_info/cycle_number (Type is String) coordinates: orbit_info_crossing_time (Type is String) orbit_info_orbit_number[ /orbit_info_crossing_time= 0..106] (Type is UInt16) attributes long_name: Orbit Number (Type is String) units: 1 (Type is String) source: Operations (Type is String) valid_min: 1 (Type is UInt16) valid_max: 65000 (Type is UInt16) contentType: referenceInformation (Type is String) description: Unique identifying number for each planned ICESat-2 orbit. (Type is String) origname: orbit_number (Type is String) fullnamepath: /orbit_info/orbit_number (Type is String) coordinates: orbit_info_crossing_time (Type is String) orbit_info_lan[ /orbit_info_crossing_time= 0..106] (Type is Float64) attributes long_name: Ascending Node Longitude (Type is String) units: degrees_east (Type is String) source: POD/PPD (Type is String) valid_min: -180.00000000000000 (Type is Float64) valid_max: 180.00000000000000 (Type is Float64) contentType: referenceInformation (Type is String) description: Longitude at the ascending node crossing. Type: double precision. (Type is String) origname: lan (Type is String) fullnamepath: /orbit_info/lan (Type is String) coordinates: orbit_info_crossing_time (Type is String) orbit_info_sc_orient[ /orbit_info_sc_orient_time= 0..0] (Type is Int8) attributes long_name: Spacecraft Orientation (Type is String) units: 1 (Type is String) source: POD/PPD (Type is String) valid_min: 0 (Type is Int8) valid_max: 2 (Type is Int8) contentType: referenceInformation (Type is String) description: This parameter tracks the spacecraft orientation between forward, backward and transitional flight modes. ICESat-2 is considered to be flying forward when the weak beams are leading the strong beams; and backward when the strong beams are leading the weak beams. ICESat-2 is considered to be in transition while it is maneuvering between the two orientations. Science quality is potentially degraded while in transition mode. Type: integer1. (Type is String) flag_meanings: backward forward transition (Type is String) flag_values: 0, 1, 2 (Type is Int8) origname: sc_orient (Type is String) fullnamepath: /orbit_info/sc_orient (Type is String) coordinates: orbit_info_sc_orient_time (Type is String) orbit_info_rgt[ /orbit_info_crossing_time= 0..106] (Type is Int16) attributes long_name: Reference Ground track (Type is String) units: 1 (Type is String) source: POD/PPD (Type is String) valid_min: 1 (Type is Int16) valid_max: 1387 (Type is Int16) contentType: referenceInformation (Type is String) description: The reference ground track (RGT) is the track on the earth at which a specified unit vector within the observatory is pointed. Under nominal operating conditions, there will be no data collected along the RGT, as the RGT is spanned by GT3 and GT4. During slews or off-pointing, it is possible that ground tracks may intersect the RGT. The ICESat-2 mission has 1387 RGTs. Type: integer2. (Type is String) origname: rgt (Type is String) fullnamepath: /orbit_info/rgt (Type is String) coordinates: orbit_info_crossing_time (Type is String) global_grnd_detect_img[ /FakeDim1= 0..723] [ /FakeDim2= 0..1026] [ /FakeDim3= 0..2] (Type is Byte) attributes CLASS: IMAGE (Type is String) IMAGE_VERSION: 1.2 (Type is String) IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String) INTERLACE_MODE: INTERLACE_PIXEL (Type is String) origname: global_grnd_detect_img (Type is String) fullnamepath: /global_grnd_detect_img (Type is String) spolar_grnd_detect[ /spolar_grid_lat= 0..29] [ /spolar_grid_lon= 0..119] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) long_name: South Polar Ground Detection Frequency (fraction) (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.6, Section 5.0, Table 5. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: modelResult (Type is String) description: The south polar ground detection frequency two-dimensional atmospheric gridded parameter. For each south polar grid cell this represents the number of detected surface signal 25 Hz (high-rate profile) observations (surface_sig () > 0.0) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded south polar ground detection values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The calculation results in a fractional value. The ATL09 required detected surface signal (surface_sig ()) is determined from the surface signal count of the number of photons in the detected surface bin in the L3A ATM high-rate profile processing. Grid array organization: spolar_grnd_detect (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the weekly gridded array dimension is: spolar_grnd_detect (120,30), type: floating point. Reference: spolar_grnd_detect (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "spolar_grnd_detect_img" in the ATL16 product. The applicable south polar observation counts for this atmosphere gridded parameter are available from: spolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. (Type is String) coordinates: spolar_grid_lon spolar_grid_lat (Type is String) origname: spolar_grnd_detect (Type is String) fullnamepath: /spolar_grnd_detect (Type is String) spolar_lowcloud_frac_img[ /FakeDim4= 0..637] [ /FakeDim5= 0..561] [ /FakeDim3= 0..2] (Type is Byte) attributes CLASS: IMAGE (Type is String) IMAGE_VERSION: 1.2 (Type is String) IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String) INTERLACE_MODE: INTERLACE_PIXEL (Type is String) origname: spolar_lowcloud_frac_img (Type is String) fullnamepath: /spolar_lowcloud_frac_img (Type is String) npolar_highcloud_frac_img[ /FakeDim4= 0..637] [ /FakeDim5= 0..561] [ /FakeDim3= 0..2] (Type is Byte) attributes CLASS: IMAGE (Type is String) IMAGE_VERSION: 1.2 (Type is String) IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String) INTERLACE_MODE: INTERLACE_PIXEL (Type is String) origname: npolar_highcloud_frac_img (Type is String) fullnamepath: /npolar_highcloud_frac_img (Type is String) npolar_hirate_blowing_snow_freq_img[ /FakeDim4= 0..637] [ /FakeDim5= 0..561] [ /FakeDim3= 0..2] (Type is Byte) attributes CLASS: IMAGE (Type is String) IMAGE_VERSION: 1.2 (Type is String) IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String) INTERLACE_MODE: INTERLACE_PIXEL (Type is String) origname: npolar_hirate_blowing_snow_freq_img (Type is String) fullnamepath: /npolar_hirate_blowing_snow_freq_img (Type is String) spolar_hirate_blowing_snow_freq_img[ /FakeDim4= 0..637] [ /FakeDim5= 0..561] [ /FakeDim3= 0..2] (Type is Byte) attributes CLASS: IMAGE (Type is String) IMAGE_VERSION: 1.2 (Type is String) IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String) INTERLACE_MODE: INTERLACE_PIXEL (Type is String) origname: spolar_hirate_blowing_snow_freq_img (Type is String) fullnamepath: /spolar_hirate_blowing_snow_freq_img (Type is String) npolar_grnd_detect_img[ /FakeDim4= 0..637] [ /FakeDim5= 0..561] [ /FakeDim3= 0..2] (Type is Byte) attributes CLASS: IMAGE (Type is String) IMAGE_VERSION: 1.2 (Type is String) IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String) INTERLACE_MODE: INTERLACE_PIXEL (Type is String) origname: npolar_grnd_detect_img (Type is String) fullnamepath: /npolar_grnd_detect_img (Type is String) npolar_lowcloud_frac[ /npolar_grid_lat= 0..29] [ /npolar_grid_lon= 0..119] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) long_name: North Polar Low Cloud Fraction (<= 4km) (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.3.1, Section 5.0, Table 5. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: modelResult (Type is String) description: The north polar low (<= 4km) cloud fraction two-dimensional atmospheric gridded parameter. For each north polar grid cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1 within cloud_flag_atm () layers) that occurs below and up to and including 4 km from the layer top (layer_top (,) <= 4.0 within cloud_flag_atm () layers) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded north polar low cloud fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALD. The ATL09 required number of layers (cloud_flag_atm ()), the layer attribute flag (layer_attr (,)), and the height of the detected layers (layer_top (,)) are determined from the backscatter profile using the DDA layer finder in the L3A ATM high-rate profile processing. Grid array organization: npolar_lowcloud_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the weekly gridded array dimension is: npolar_lowcloud_frac (120,30), type: floating point. Reference: npolar_lowcloud_frac (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "npolar_lowcloud_frac_img" in the ATL16 product. The applicable north polar observation counts for this atmosphere gridded parameter are available from: npolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. (Type is String) coordinates: npolar_grid_lon npolar_grid_lat (Type is String) origname: npolar_lowcloud_frac (Type is String) fullnamepath: /npolar_lowcloud_frac (Type is String) global_asr_img[ /FakeDim1= 0..723] [ /FakeDim2= 0..1026] [ /FakeDim3= 0..2] (Type is Byte) attributes CLASS: IMAGE (Type is String) IMAGE_VERSION: 1.2 (Type is String) IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String) INTERLACE_MODE: INTERLACE_PIXEL (Type is String) origname: global_asr_img (Type is String) fullnamepath: /global_asr_img (Type is String) npolar_lorate_bsnow_obs_grid[ /npolar_grid_lat= 0..29] [ /npolar_grid_lon= 0..119] (Type is Float32) attributes long_name: north polar low-rate blowing snow frequency observation grid (Type is String) units: 1 (Type is String) source: L3B ATM ATBD, Section 3.9, Table 4., Section 5.0, Table 5. (Type is String) contentType: modelResult (Type is String) description: The north polar low-rate blowing snow observation count two-dimensional gridded parameter. The number of low-rate profile blowing snow observations used in the computation of low-rate blowing snow frequency for the Arctic. For each north polar grid cell this represents the number of valid blowing snow confidence 1 Hz (low-rate profile) observations (bsnow_con () .ne. INVALID), where the low-rate profile blowing snow confidence value exceeds the surface not detected value (bsnow_con () > -3, and is actually implemented as bsnow_con () => -2). Only valid detected blowing snow layer top height 1 Hz (low-rate profile) observations (bsnow_h () .ne. INVALID and bsnow_h () > 0.0) and only valid blowing snow confidence 1 Hz (low-rate profile) observations (bsnow_con () .ne. INVALID), where the low-rate blowing snow confidence value exceeds the surface not detected value (bsnow_con () > -3, and is implemented as bsnow_con () => -2) in each grid cell are used to compute the cell north polar low-rate blowing snow frequency (npolar_lorate_blowing_snow_freq (i,j)). Grid array organization: npolar_lorate_bsnow_obs_grid (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the weekly gridded array dimension is: npolar_lorate_bsnow_obs_grid (120,30), type: floating point. Reference: npolar_lorate_bsnow_obs_grid (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. The north polar observation counts are applicable to the atmosphere gridded parameter: npolar_lorate_blowing_snow_freq (i,j). (Type is String) coordinates: npolar_grid_lon npolar_grid_lat (Type is String) origname: npolar_lorate_bsnow_obs_grid (Type is String) fullnamepath: /npolar_lorate_bsnow_obs_grid (Type is String) spolar_lowcloud_frac[ /spolar_grid_lat= 0..29] [ /spolar_grid_lon= 0..119] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) long_name: South Polar Low Cloud Fraction (<= 4km) (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.3.1, Section 5.0, Table 5. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: modelResult (Type is String) description: The south polar low (<= 4km) cloud fraction two-dimensional atmospheric gridded parameter. For each south polar grid cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1 within cloud_flag_atm () layers) that occurs below and up to and including 4 km from the layer top (layer_top(,) <= 4.0 within cloud_flag_atm () layers) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded south polar low cloud fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The ATL09 required number of layers (cloud_flag_atm ()), the layer attribute flag (layer_attr (,)), and the height of the detected layers (layer_top (,)) are determined from the backscatter profile using the DDA layer finder in the L3A ATM high-rate profile processing. Grid array organization: spolar_lowcloud_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the weekly gridded array dimension is: spolar_lowcloud_frac (120,30), type: floating point. Reference: spolar_lowcloud_frac (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "spolar_lowcloud_frac_img" in the ATL16 product. The applicable south polar observation counts for this atmosphere gridded parameter are available from: spolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. (Type is String) coordinates: spolar_grid_lon spolar_grid_lat (Type is String) origname: spolar_lowcloud_frac (Type is String) fullnamepath: /spolar_lowcloud_frac (Type is String) global_column_od[ /global_grid_lat= 0..59] [ /global_grid_lon= 0..119] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) long_name: Global (Over Water) Total Column Optical Depth (0-1.5) (Type is String) units: 1 (Type is String) source: L3B ATM ATBD, Section 3.2, Section 5.0, Table 5. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.500000000 (Type is Float32) contentType: modelResult (Type is String) description: The global (over water) average total column optical depth two-dimensional atmospheric gridded parameter. For each global grid cell this represents the ratio of the summation of the valid over-water (column_od_asr_qf () = 4 for water) column optical depth 25 Hz (high-rate profile) observations (column_od_asr () .ne. INVALID) to the number of valid over-water column optical depth 25 Hz (high-rate profile) observations (tcod_obs_grid (i,j)) in that cell. The average over-water global total column optical depth values are produced when the number of valid over-water column optical depth 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (tcod_obs_grid (i,j) => obs_minimum); otherwise set to INVALID. The ATL09 required total column optical depth (column_od_asr ()) is estimated from the apparent surface reflectance (ASR) and the assumed actual surface reflectance. The required total column optical depth from ASR quality flag (column_od_asr_qf ()) supplies the reflecting surface type for over-water surface determination. Both ATL09 parameters are supplied from the L3A ATM high-rate profile processing. The 0.0 to 1.5 value range constraint is applied to the global image, and is not applied to the gridded parameter values. Grid array organization: global_column_od (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given weekly global_grid_lon_scale = 3.0 degrees and global_grid_lat_scale = 3.0 degrees, gridded array dimension: global_column_od (120,60), type: floating point. Reference: global_column_od (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the global projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "global_column_od_img" in the ATL16 product. The applicable global observation counts for this atmosphere gridded parameter are available from: tcod_obs_grid (i,j). Expected value range: minimum: 0.0, maximum: 1.5. Maximum value may exceed 1.5 (e.g., 2.57788515). Image will be limited to the range of 0.0 to 1.5. (Type is String) coordinates: global_grid_lon global_grid_lat (Type is String) origname: global_column_od (Type is String) fullnamepath: /global_column_od (Type is String) data_qa_flag[ /FakeDim0= 0..0] (Type is Int8) attributes long_name: data quality flag (Type is String) units: auxiliaryInformation (Type is String) source: L3B ATM ATBD, Section 5.0, Table 5. (Type is String) contentType: qualityInformation (Type is String) description: The data quality flag scalar parameter. This is a TBD flag that may be used to indicate data quality. Type: integer1. (Type is String) origname: data_qa_flag (Type is String) fullnamepath: /data_qa_flag (Type is String) npolar_highcloud_frac[ /npolar_grid_lat= 0..29] [ /npolar_grid_lon= 0..119] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) long_name: North Polar High Cloud Fraction (> 8km) (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.3.1, Section 5.0, Table 5. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: modelResult (Type is String) description: The north polar high (> 8km) cloud fraction two-dimensional atmospheric gridded parameter. For each north polar grid cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1 within cloud_flag_atm () layers) that occurs above 8 km from the layer top (layer_top(,) > 8.0 within cloud_flag_atm () layers) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded north polar high cloud fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The ATL09 required number of layers (cloud_flag_atm ()), the layer attribute flag (layer_attr (,)), and the height of the detected layers (layer_top (,)) are determined from the backscatter profile using the DDA layer finder in the L3A ATM high-rate profile processing. Grid array organization: npolar_highcloud_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the weekly gridded array dimension is: npolar_highcloud_frac (120,30), type: floating point. Reference: npolar_highcloud_frac (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "npolar_highcloud_frac_img" in the ATL16 product. The applicable north polar observation counts for this atmosphere gridded parameter are available from: npolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. (Type is String) coordinates: npolar_grid_lon npolar_grid_lat (Type is String) origname: npolar_highcloud_frac (Type is String) fullnamepath: /npolar_highcloud_frac (Type is String) spolar_grnd_detect_img[ /FakeDim4= 0..637] [ /FakeDim5= 0..561] [ /FakeDim3= 0..2] (Type is Byte) attributes CLASS: IMAGE (Type is String) IMAGE_VERSION: 1.2 (Type is String) IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String) INTERLACE_MODE: INTERLACE_PIXEL (Type is String) origname: spolar_grnd_detect_img (Type is String) fullnamepath: /spolar_grnd_detect_img (Type is String) tcod_obs_grid[ /global_grid_lat= 0..59] [ /global_grid_lon= 0..119] (Type is Float32) attributes long_name: global total column optical depth (over water) observation grid (Type is String) units: 1 (Type is String) source: L3B ATM ATBD Section 3.9, Table 4., Section 5.0, Table 5. (Type is String) contentType: modelResult (Type is String) description: The global total column optical depth (over water) observation count two-dimensional gridded parameter. The number of observations used to compute the average global total column optical depth over water. Only valid surface return over-water (column_od_asr_qf () = 4 for water) column optical depth (column_od_asr () .ne. INVALID and column_od_asr () > 0.0) 25 Hz (high-rate profile) observations in each grid cell are used to compute the cell average over-water total column optical depth (global_column_od (i,j)). Grid array organization: tcod_obs_grid (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly global_grid_lon_scale = 3.0 degrees and the global_grid_lat_scale = 3.0 degrees, the weekly global gridded array dimension is: tcod_obs_grid (120,60), type: floating point. Reference: tcod_obs_grid (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the global projection array. The global observation counts are applicable to the atmosphere gridded parameter: global_column_od (i,j). (Type is String) coordinates: global_grid_lon global_grid_lat (Type is String) origname: tcod_obs_grid (Type is String) fullnamepath: /tcod_obs_grid (Type is String) spolar_totalcloud_frac[ /spolar_grid_lat= 0..29] [ /spolar_grid_lon= 0..119] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) long_name: South Polar Total Cloud Fraction (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.3.1, Section 5.0, Table 5. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: modelResult (Type is String) description: The south polar total cloud fraction two-dimensional atmospheric gridded parameter. For each south polar grid cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1 within cloud_flag_atm () layers) to the number of all 25 Hz (high-rate profile) observations (spolar_cloud_obs_grid (i,j)) in the cell. The gridded south polar total cloud fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (spolar_cloud_obs_grid (i,j) => obs_minimum); otherwise set to INVALID. The ATL09 required number of layers (cloud_flag_atm ()) and the layer attribute flag (layer_attr (,)) are determined from the backscatter profile using the DDA layer finder in the L3A ATM high-rate profile processing. Grid array organization: spolar_totalcloud_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the weekly gridded array dimension is: spolar_totalcloud_frac (120,30), type: floating point. Reference: spolar_totalcloud_frac (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "spolar_totalcloud_frac_img" in the ATL16 product. The applicable south polar observation counts for this atmosphere gridded parameter are available from: spolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. (Type is String) coordinates: spolar_grid_lon spolar_grid_lat (Type is String) origname: spolar_totalcloud_frac (Type is String) fullnamepath: /spolar_totalcloud_frac (Type is String) npolar_transcloud_frac[ /npolar_grid_lat= 0..29] [ /npolar_grid_lon= 0..119] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) long_name: North Polar Transmissive Cloud Fraction (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.3.2, Section 5.0, Table 5. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: modelResult (Type is String) description: The north polar transmissive cloud fraction two-dimensional atmospheric gridded parameter. For each north polar cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1 within cloud_flag_atm () layers) with surface signal detection (surface_sig () > 0.0) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded north polar transmissive cloud fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The fraction of transmissive clouds covering the entire grid cell. Transmissive clouds are clouds that permit or allow transmission of downward radiation through the cloud. The ATL09 required number of layers (cloud_flag_atm ()) and the layer attribute flag (layer_attr (,)) are determined from the backscatter profile using the DDA layer finder, and the required detected surface signal (surface_sig ()) is determined from the surface signal count of the number of photons in the detected surface bin, all in the L3A ATM high-rate profile processing. Grid array organization: npolar_transcloud_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the weekly gridded array dimension is: npolar_transcloud_frac (120,30), type: floating point. Reference: npolar_transcloud_frac (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "npolar_transcloud_frac_img" in the ATL16 product. The applicable north polar observation counts for this atmosphere gridded parameter are available from: npolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. (Type is String) coordinates: npolar_grid_lon npolar_grid_lat (Type is String) origname: npolar_transcloud_frac (Type is String) fullnamepath: /npolar_transcloud_frac (Type is String) npolar_cloud_obs_grid[ /npolar_grid_lat= 0..29] [ /npolar_grid_lon= 0..119] (Type is Float32) attributes long_name: north polar cloud observation grid (Type is String) units: 1 (Type is String) source: L3B ATM ATBD, Section 3.9, Table 4., Section 5.0, Table 5. (Type is String) contentType: modelResult (Type is String) description: The north polar total cloud fraction observation count two-dimensional gridded parameter. The number of observations used to compute the north polar total cloud fraction. This number represents all 25 Hz (high-rate profile) observations in each cell. Only 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1) in each grid cell are used to compute the cell north polar total cloud fraction (npolar_totlcloud_frac (i,j)). Grid array organization: npolar_cloud_obs_grid (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the weekly gridded array dimension is: npolar_cloud_obs_grid (120,30), type: floating point. Reference: npolar_cloud_obs_grid (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. The north polar observation counts are applicable to these atmosphere gridded parameters: npolar_lowcloud_frac (i,j), npolar_midcloud_frac (i,j), npolar_highcloud_frac (i,j), npolar_totalcloud_frac (i,j), npolar_transcloud_frac (i,j), npolar_opaquecloud_frac (i,j), and npolar_grnd_detect (i,j). (Type is String) coordinates: npolar_grid_lon npolar_grid_lat (Type is String) origname: npolar_cloud_obs_grid (Type is String) fullnamepath: /npolar_cloud_obs_grid (Type is String) npolar_hirate_bsnow_obs_grid[ /npolar_grid_lat= 0..29] [ /npolar_grid_lon= 0..119] (Type is Float32) attributes long_name: north polar high-rate blowing snow frequency observation grid (Type is String) units: 1 (Type is String) source: L3B ATM ATBD, Section 3.9, Table 4., Section 5.0, Table 5. (Type is String) contentType: modelResult (Type is String) description: The north polar high-rate blowing snow observation count two-dimensional gridded parameter. The number of high-rate profile blowing snow observations used in the computation of high-rate blowing snow frequency for the Arctic. For each north polar grid cell this represents the number of valid blowing snow confidence 25 Hz (high-rate profile) observations (bsnow_con () .ne. INVALID), where the high-rate profile blowing snow confidence value exceeds the surface not detected value (bsnow_con () > -3, and is actually implemented as bsnow_con () => -2). Only valid detected blowing snow layer top height 25 Hz (high-rate profile) observations (bsnow_h () .ne. INVALID and bsnow_h () > 0.0) and only valid blowing snow confidence 25 Hz (high-rate profile) observations (bsnow_con () .ne. INVALID), where the high-rate blowing snow confidence value exceeds the surface not detected value (bsnow_con () > -3, and is implemented as bsnow_con () => -2) in each grid cell are used to compute the cell north polar high-rate blowing snow frequency (npolar_hirate_blowing_snow_freq (i,j)). Grid array organization: npolar_hirate_bsnow_obs_grid (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the weekly gridded array dimension is: npolar_hirate_bsnow_obs_grid (120,30), type: floating point. Reference: npolar_hirate_bsnow_obs_grid (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. The north polar observation counts are applicable to the atmosphere gridded parameter: npolar_hirate_blowing_snow_freq (i,j). (Type is String) coordinates: npolar_grid_lon npolar_grid_lat (Type is String) origname: npolar_hirate_bsnow_obs_grid (Type is String) fullnamepath: /npolar_hirate_bsnow_obs_grid (Type is String) spolar_asr_obs_grid[ /spolar_grid_lat= 0..29] [ /spolar_grid_lon= 0..119] (Type is Float32) attributes long_name: south polar apparent surface reflectance observation grid (Type is String) units: 1 (Type is String) source: L3B ATM ATBD, Section 3.9, Table 4., Section 5.0, Table 5. (Type is String) contentType: modelResult (Type is String) description: The south polar apparent surface reflectance (ASR) observation count two-dimensional gridded parameter. The number of observations used to compute the average south polar apparent surface reflectance (ASR). Only surface signal detected ASR 25 Hz (high-rate profile) observations (apparent_surf_reflec () > 0.0) in each grid cell are used to compute the cell south polar ASR (spolar_asr (i,j)). Grid array organization: spolar_asr_obs_grid (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the weekly gridded array dimension is: spolar_asr_obs_grid (120,30), type: floating point. Reference: spolar_asr_obs_grid (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. The south polar observation counts are applicable to to the atmosphere gridded parameter: spolar_asr (i,j). (Type is String) coordinates: spolar_grid_lon spolar_grid_lat (Type is String) origname: spolar_asr_obs_grid (Type is String) fullnamepath: /spolar_asr_obs_grid (Type is String) global_asr_obs_grid[ /global_grid_lat= 0..59] [ /global_grid_lon= 0..119] (Type is Float32) attributes long_name: global apparent surface reflectance observation grid (Type is String) units: 1 (Type is String) source: L3B ATM ATBD, Section 3.9, Table 4., Section 5.0, Table 5. (Type is String) contentType: modelResult (Type is String) description: The global apparent surface reflectance (ASR) observation count two-dimensional gridded parameter. The number of observations used to compute the average global apparent surface reflectance (ASR). Only surface signal detected ASR 25 Hz (high-rate profile) observations (apparent_surf_reflec () > 0.0) in each grid cell are used to compute the cell global ASR (global_asr (i,j)). Grid array organization: global_asr_obs_grid (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly global_grid_lon_scale = 3.0 degrees and the global_grid_lat_scale = 3.0 degrees, the weekly global gridded array dimension is: global_asr_obs_grid (120,60), type: floating point . Reference: global_asr_obs_grid (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the global projection array. The global observation counts are applicable to the atmosphere gridded parameter: global_asr (i,j). (Type is String) coordinates: global_grid_lon global_grid_lat (Type is String) origname: global_asr_obs_grid (Type is String) fullnamepath: /global_asr_obs_grid (Type is String) spolar_opaquecloud_frac_img[ /FakeDim4= 0..637] [ /FakeDim5= 0..561] [ /FakeDim3= 0..2] (Type is Byte) attributes CLASS: IMAGE (Type is String) IMAGE_VERSION: 1.2 (Type is String) IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String) INTERLACE_MODE: INTERLACE_PIXEL (Type is String) origname: spolar_opaquecloud_frac_img (Type is String) fullnamepath: /spolar_opaquecloud_frac_img (Type is String) npolar_lorate_blowing_snow_freq_img[ /FakeDim4= 0..637] [ /FakeDim5= 0..561] [ /FakeDim3= 0..2] (Type is Byte) attributes CLASS: IMAGE (Type is String) IMAGE_VERSION: 1.2 (Type is String) IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String) INTERLACE_MODE: INTERLACE_PIXEL (Type is String) origname: npolar_lorate_blowing_snow_freq_img (Type is String) fullnamepath: /npolar_lorate_blowing_snow_freq_img (Type is String) spolar_lorate_blowing_snow_freq_img[ /FakeDim4= 0..637] [ /FakeDim5= 0..561] [ /FakeDim3= 0..2] (Type is Byte) attributes CLASS: IMAGE (Type is String) IMAGE_VERSION: 1.2 (Type is String) IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String) INTERLACE_MODE: INTERLACE_PIXEL (Type is String) origname: spolar_lorate_blowing_snow_freq_img (Type is String) fullnamepath: /spolar_lorate_blowing_snow_freq_img (Type is String) global_aerosol_frac[ /global_grid_lat= 0..59] [ /global_grid_lon= 0..119] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) long_name: Global Aerosol Fraction (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.1.1, Section 5.0, Table 5. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: modelResult (Type is String) description: The global aerosol fraction two-dimensional atmospheric gridded parameter. For each global grid cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one aerosol layer (layer_attr (,) = 2 within cloud_flag_atm () layers) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded global aerosol fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The ATL09 required number of layers (cloud_flag_atm ()) and the layer attribute flag (layer_attr (,)) are determined from the backscatter profile using the DDA layer finder in the L3A ATM high-rate profile processing. Grid array organization: global_aerosol_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly global_grid_lon_scale = 3.0 degrees and the global_grid_lat_scale = 3.0 degrees, the global gridded array dimension is: global_aerosol_frac (120,60), type: floating point. Reference: global_aerosol_frac (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the global projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "global_aerosol_frac_img" in the ATL16 product. The applicable global observation counts for this atmosphere gridded parameter are available from: global_cloud_aerosol_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. (Type is String) coordinates: global_grid_lon global_grid_lat (Type is String) origname: global_aerosol_frac (Type is String) fullnamepath: /global_aerosol_frac (Type is String) npolar_asr_obs_grid[ /npolar_grid_lat= 0..29] [ /npolar_grid_lon= 0..119] (Type is Float32) attributes long_name: north polar apparent surface reflectance observation grid (Type is String) units: 1 (Type is String) source: L3B ATM ATBD, Section 3.9, Table 4., Section 5.0, Table 5. (Type is String) contentType: modelResult (Type is String) description: The north polar apparent surface reflectance (ASR) observation count two-dimensional gridded parameter. The number of observations used to compute the average north polar apparent surface reflectance (ASR). Only surface signal detected ASR 25 Hz (high-rate profile) observations (apparent_surf_reflec () > 0.0) in each grid cell are used to compute the cell north polar ASR (npolar_asr (i,j)). Grid array organization: npolar_asr_obs_grid (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the weekly gridded array dimension is: npolar_asr_obs_grid (120,30), type: floating point. Reference: npolar_asr_obs_grid (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. The north polar observation counts are applicable to to the atmosphere gridded parameter: npolar_asr (i,j). (Type is String) coordinates: npolar_grid_lon npolar_grid_lat (Type is String) origname: npolar_asr_obs_grid (Type is String) fullnamepath: /npolar_asr_obs_grid (Type is String) npolar_midcloud_frac[ /npolar_grid_lat= 0..29] [ /npolar_grid_lon= 0..119] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) long_name: North Polar Mid Cloud Fraction (> 4km and <= 8km) (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.3.1, Section 5.0, Table 5. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: modelResult (Type is String) description: The north polar middle (> 4km and <= 8km) cloud fraction two-dimensional atmospheric gridded parameter. For each north polar grid cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1 within cloud_flag_atm () layers) that occurs above 4 km and up to and including 8 km from the layer top (layer_top (,) > 4.0 and <= 8.0 within cloud_flag_atm () layers) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded north polar middle cloud fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The ATL09 required number of layers (cloud_flag_atm ()), the layer attribute flag (layer_attr (,)), and the height of the detected layers (layer_top (,)) are determined from the backscatter profile using the DDA layer finder in the L3A ATM high-rate profile processing. Grid array organization: npolar_midcloud_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the weekly gridded array dimension is: npolar_midcloud_frac (120,30), type: floating point. Reference: npolar_midcloud_frac (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "npolar_midcloud_frac_img" in the ATL16 product. The applicable north polar observation counts for this atmosphere gridded parameter are available from: npolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. (Type is String) coordinates: npolar_grid_lon npolar_grid_lat (Type is String) origname: npolar_midcloud_frac (Type is String) fullnamepath: /npolar_midcloud_frac (Type is String) global_grnd_detect[ /global_grid_lat= 0..59] [ /global_grid_lon= 0..119] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) long_name: Global Ground Detection Frequency (fraction) (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.6, Section 5.0, Table 5. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: modelResult (Type is String) description: The global ground detection frequency two-dimensional atmospheric gridded parameter. For each global grid cell this represents the number of detected surface signal 25 Hz (high-rate profile) observations (surface_sig () > 0.0) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded global ground detection values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The calculation results in a fractional value. The ATL09 required detected surface signal (surface_sig ()) is determined from the surface signal count of the number of photons in the detected surface bin in the L3A ATM high-rate profile processing. Grid array organization: global_grnd_detect (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given weekly global_grid_lon_scale = 3.0 degrees and global_grid_lat_scale = 3.0 degrees, gridded array dimension: global_grnd_detect (120,60), type: floating point. Reference: global_grnd_detect (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the global projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "global_ground_detect_img" in the ATL16 product. The applicable global observation counts for this atmosphere gridded parameter are available from: global_cloud_aerosol_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. (Type is String) coordinates: global_grid_lon global_grid_lat (Type is String) origname: global_grnd_detect (Type is String) fullnamepath: /global_grnd_detect (Type is String) spolar_highcloud_frac_img[ /FakeDim4= 0..637] [ /FakeDim5= 0..561] [ /FakeDim3= 0..2] (Type is Byte) attributes CLASS: IMAGE (Type is String) IMAGE_VERSION: 1.2 (Type is String) IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String) INTERLACE_MODE: INTERLACE_PIXEL (Type is String) origname: spolar_highcloud_frac_img (Type is String) fullnamepath: /spolar_highcloud_frac_img (Type is String) quality_assessment_qa_granule_fail_reason[ /FakeDim0= 0..0] (Type is Int32) attributes long_name: Granule Failure Reason (Type is String) units: 1 (Type is String) source: Operations (Type is String) valid_min: 0 (Type is Int32) valid_max: 5 (Type is Int32) contentType: qualityInformation (Type is String) description: Flag indicating granule failure reason. 0=no failure; 1=processing error; 2=Insufficient output data was generated; 3=TBD Failure; 4=TBD Failure; 5=other failure. (Type is String) flag_meanings: no_failure PROCESS_ERROR INSUFFICIENT_OUTPUT failure_3 failure_4 OTHER_FAILURE (Type is String) flag_values: 0, 1, 2, 3, 4, 5 (Type is Int32) origname: qa_granule_fail_reason (Type is String) fullnamepath: /quality_assessment/qa_granule_fail_reason (Type is String) quality_assessment_qa_granule_pass_fail[ /FakeDim0= 0..0] (Type is Int32) attributes long_name: Granule Pass Flag (Type is String) units: 1 (Type is String) source: Operations (Type is String) valid_min: 0 (Type is Int32) valid_max: 1 (Type is Int32) contentType: qualityInformation (Type is String) description: Flag indicating granule quality. 0=granule passes automatic QA. 1=granule fails automatic QA. (Type is String) flag_meanings: PASS FAIL (Type is String) flag_values: 0, 1 (Type is Int32) origname: qa_granule_pass_fail (Type is String) fullnamepath: /quality_assessment/qa_granule_pass_fail (Type is String) quality_assessment_atmosphere_global_aerosol_frac_mean[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: global aerosol fraction mean value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The global aerosol fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: global_aerosol_frac_mean (Type is String) fullnamepath: /quality_assessment/atmosphere/global_aerosol_frac_mean (Type is String) quality_assessment_atmosphere_spolar_totalcloud_frac_mean[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: south polar total cloud fraction mean value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The south polar total cloud fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: spolar_totalcloud_frac_mean (Type is String) fullnamepath: /quality_assessment/atmosphere/spolar_totalcloud_frac_mean (Type is String) quality_assessment_atmosphere_global_asr_mean[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: global apparent surface reflectance mean value (Type is String) units: 1 (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 3.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The global apparent surface reflectance gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.08103633). (Type is String) origname: global_asr_mean (Type is String) fullnamepath: /quality_assessment/atmosphere/global_asr_mean (Type is String) quality_assessment_atmosphere_global_aerosol_frac_min[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: global aerosol fraction minimum value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The global aerosol fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: global_aerosol_frac_min (Type is String) fullnamepath: /quality_assessment/atmosphere/global_aerosol_frac_min (Type is String) quality_assessment_atmosphere_npolar_asr_max[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: north polar apparent surface reflectance maximum value (Type is String) units: 1 (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 3.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The north polar apparent surface reflectance gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.08103633). (Type is String) origname: npolar_asr_max (Type is String) fullnamepath: /quality_assessment/atmosphere/npolar_asr_max (Type is String) quality_assessment_atmosphere_spolar_totalcloud_frac_sdev[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: south polar total cloud fraction standard deviation value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The south polar total cloud fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: spolar_totalcloud_frac_sdev (Type is String) fullnamepath: /quality_assessment/atmosphere/spolar_totalcloud_frac_sdev (Type is String) quality_assessment_atmosphere_npolar_highcloud_frac_sdev[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: north polar high (> 8km) cloud fraction standard deviation value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The north polar high (> 8km) cloud fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: npolar_highcloud_frac_sdev (Type is String) fullnamepath: /quality_assessment/atmosphere/npolar_highcloud_frac_sdev (Type is String) quality_assessment_atmosphere_npolar_midcloud_frac_max[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: north polar middle (> 4km and <= 8km) cloud fraction maximum value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The north polar middle (> 4km and <= 8km) cloud fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: npolar_midcloud_frac_max (Type is String) fullnamepath: /quality_assessment/atmosphere/npolar_midcloud_frac_max (Type is String) quality_assessment_atmosphere_npolar_lorate_blowing_snow_freq_mean[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: north polar low-rate blowing snow frequency mean value (Type is String) units: percent (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 100.0000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The north polar low-rate blowing snow frequency gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. (Type is String) origname: npolar_lorate_blowing_snow_freq_mean (Type is String) fullnamepath: /quality_assessment/atmosphere/npolar_lorate_blowing_snow_freq_mean (Type is String) quality_assessment_atmosphere_spolar_lowcloud_frac_mean[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: south polar low (<= 4km) cloud fraction mean value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The south polar low (<= 4km) cloud fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: spolar_lowcloud_frac_mean (Type is String) fullnamepath: /quality_assessment/atmosphere/spolar_lowcloud_frac_mean (Type is String) quality_assessment_atmosphere_spolar_totalcloud_frac_min[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: south polar total cloud fraction minimum value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The south polar total cloud fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: spolar_totalcloud_frac_min (Type is String) fullnamepath: /quality_assessment/atmosphere/spolar_totalcloud_frac_min (Type is String) quality_assessment_atmosphere_global_asr_sdev[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: global apparent surface reflectance standard deviation value (Type is String) units: 1 (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 3.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The global apparent surface reflectance gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.08103633). (Type is String) origname: global_asr_sdev (Type is String) fullnamepath: /quality_assessment/atmosphere/global_asr_sdev (Type is String) quality_assessment_atmosphere_global_grnd_detect_mean[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: global ground detection frequency mean value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The global ground detection frequency gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: global_grnd_detect_mean (Type is String) fullnamepath: /quality_assessment/atmosphere/global_grnd_detect_mean (Type is String) quality_assessment_atmosphere_spolar_transcloud_frac_sdev[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: south polar transmissive cloud fraction standard deviation value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The south polar transmissive cloud fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: spolar_transcloud_frac_sdev (Type is String) fullnamepath: /quality_assessment/atmosphere/spolar_transcloud_frac_sdev (Type is String) quality_assessment_atmosphere_npolar_highcloud_frac_max[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: north polar high (> 8km) cloud fraction maximum value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The north polar high (> 8km) cloud fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: npolar_highcloud_frac_max (Type is String) fullnamepath: /quality_assessment/atmosphere/npolar_highcloud_frac_max (Type is String) quality_assessment_atmosphere_spolar_asr_min[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: south polar apparent surface reflectance minimum value (Type is String) units: 1 (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 3.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The south polar apparent surface reflectance gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.08103633). (Type is String) origname: spolar_asr_min (Type is String) fullnamepath: /quality_assessment/atmosphere/spolar_asr_min (Type is String) quality_assessment_atmosphere_npolar_lorate_blowing_snow_freq_sdev[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: north polar low-rate blowing snow frequency standard deviation value (Type is String) units: percent (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 100.0000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The north polar low-rate blowing snow frequency gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. (Type is String) origname: npolar_lorate_blowing_snow_freq_sdev (Type is String) fullnamepath: /quality_assessment/atmosphere/npolar_lorate_blowing_snow_freq_sdev (Type is String) quality_assessment_atmosphere_npolar_grnd_detect_min[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: north polar ground detection frequency minimum value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The north polar ground detection frequency gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: npolar_grnd_detect_min (Type is String) fullnamepath: /quality_assessment/atmosphere/npolar_grnd_detect_min (Type is String) quality_assessment_atmosphere_spolar_opaquecloud_frac_min[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: south polar opaque cloud fraction minimum value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The south polar opaque cloud fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: spolar_opaquecloud_frac_min (Type is String) fullnamepath: /quality_assessment/atmosphere/spolar_opaquecloud_frac_min (Type is String) quality_assessment_atmosphere_spolar_highcloud_frac_max[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: south polar high (> 8km) cloud fraction maximum value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The south polar high (> 8km) cloud fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: spolar_highcloud_frac_max (Type is String) fullnamepath: /quality_assessment/atmosphere/spolar_highcloud_frac_max (Type is String) quality_assessment_atmosphere_spolar_grnd_detect_mean[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: south polar ground detection frequency mean value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The south polar ground detection frequency gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: spolar_grnd_detect_mean (Type is String) fullnamepath: /quality_assessment/atmosphere/spolar_grnd_detect_mean (Type is String) quality_assessment_atmosphere_spolar_opaquecloud_frac_sdev[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: south polar opaque cloud fraction standard deviation value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The south polar opaque cloud fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: spolar_opaquecloud_frac_sdev (Type is String) fullnamepath: /quality_assessment/atmosphere/spolar_opaquecloud_frac_sdev (Type is String) quality_assessment_atmosphere_spolar_transcloud_frac_max[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: south polar transmissive cloud fraction maximum value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The south polar transmissive cloud fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: spolar_transcloud_frac_max (Type is String) fullnamepath: /quality_assessment/atmosphere/spolar_transcloud_frac_max (Type is String) quality_assessment_atmosphere_spolar_lowcloud_frac_min[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: south polar low (<= 4km) cloud fraction minimum value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The south polar low (<= 4km) cloud fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: spolar_lowcloud_frac_min (Type is String) fullnamepath: /quality_assessment/atmosphere/spolar_lowcloud_frac_min (Type is String) quality_assessment_atmosphere_spolar_midcloud_frac_sdev[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: south polar middle (> 4km and <= 8km) cloud fraction standard deviation value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The south polar middle (> 4km and <= 8km) cloud fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: spolar_midcloud_frac_sdev (Type is String) fullnamepath: /quality_assessment/atmosphere/spolar_midcloud_frac_sdev (Type is String) quality_assessment_atmosphere_spolar_midcloud_frac_mean[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: south polar middle (> 4km and <= 8km) cloud fraction mean value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The south polar middle (> 4km and <= 8km) cloud fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: spolar_midcloud_frac_mean (Type is String) fullnamepath: /quality_assessment/atmosphere/spolar_midcloud_frac_mean (Type is String) quality_assessment_atmosphere_spolar_midcloud_frac_min[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: south polar middle (> 4km and <= 8km) cloud fraction minimum value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The south polar middle (> 4km and <= 8km) cloud fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: spolar_midcloud_frac_min (Type is String) fullnamepath: /quality_assessment/atmosphere/spolar_midcloud_frac_min (Type is String) quality_assessment_atmosphere_npolar_totalcloud_frac_mean[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: north polar total cloud fraction mean value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The north polar total cloud fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: npolar_totalcloud_frac_mean (Type is String) fullnamepath: /quality_assessment/atmosphere/npolar_totalcloud_frac_mean (Type is String) quality_assessment_atmosphere_npolar_lorate_blowing_snow_freq_max[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: north polar low-rate blowing snow frequency maximum value (Type is String) units: percent (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 100.0000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The north polar low-rate blowing snow frequency gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. (Type is String) origname: npolar_lorate_blowing_snow_freq_max (Type is String) fullnamepath: /quality_assessment/atmosphere/npolar_lorate_blowing_snow_freq_max (Type is String) quality_assessment_atmosphere_npolar_totalcloud_frac_max[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: north polar total cloud fraction maximum value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The north polar total cloud fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: npolar_totalcloud_frac_max (Type is String) fullnamepath: /quality_assessment/atmosphere/npolar_totalcloud_frac_max (Type is String) quality_assessment_atmosphere_npolar_hirate_blowing_snow_freq_mean[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: north polar high-rate blowing snow frequency mean value (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 100.0000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The north polar high-rate blowing snow frequency gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. (Type is String) units: percent (Type is String) origname: npolar_hirate_blowing_snow_freq_mean (Type is String) fullnamepath: /quality_assessment/atmosphere/npolar_hirate_blowing_snow_freq_mean (Type is String) quality_assessment_atmosphere_global_aerosol_frac_sdev[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: global aerosol fraction standard deviation value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The global aerosol fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: global_aerosol_frac_sdev (Type is String) fullnamepath: /quality_assessment/atmosphere/global_aerosol_frac_sdev (Type is String) quality_assessment_atmosphere_spolar_lowcloud_frac_sdev[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: south polar low (<= 4km) cloud fraction standard deviation value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The south polar low (<= 4km) cloud fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: spolar_lowcloud_frac_sdev (Type is String) fullnamepath: /quality_assessment/atmosphere/spolar_lowcloud_frac_sdev (Type is String) quality_assessment_atmosphere_spolar_opaquecloud_frac_mean[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: south polar opaque cloud fraction mean value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The south polar opaque cloud fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: spolar_opaquecloud_frac_mean (Type is String) fullnamepath: /quality_assessment/atmosphere/spolar_opaquecloud_frac_mean (Type is String) quality_assessment_atmosphere_spolar_highcloud_frac_mean[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: south polar high (> 8km) cloud fraction mean value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The south polar high (> 8km) cloud fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: spolar_highcloud_frac_mean (Type is String) fullnamepath: /quality_assessment/atmosphere/spolar_highcloud_frac_mean (Type is String) quality_assessment_atmosphere_npolar_opaquecloud_frac_sdev[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: north polar opaque cloud fraction standard deviation value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The north polar opaque cloud fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: npolar_opaquecloud_frac_sdev (Type is String) fullnamepath: /quality_assessment/atmosphere/npolar_opaquecloud_frac_sdev (Type is String) quality_assessment_atmosphere_spolar_lorate_blowing_snow_freq_sdev[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: south polar low-rate blowing snow frequency standard deviation value (Type is String) units: percent (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 100.0000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The south polar low-rate blowing snow frequency gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. (Type is String) origname: spolar_lorate_blowing_snow_freq_sdev (Type is String) fullnamepath: /quality_assessment/atmosphere/spolar_lorate_blowing_snow_freq_sdev (Type is String) quality_assessment_atmosphere_spolar_highcloud_frac_sdev[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: south polar high (> 8km) cloud fraction standard deviation value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The south polar high (> 8km) cloud fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: spolar_highcloud_frac_sdev (Type is String) fullnamepath: /quality_assessment/atmosphere/spolar_highcloud_frac_sdev (Type is String) quality_assessment_atmosphere_spolar_opaquecloud_frac_max[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: south polar opaque cloud fraction maximum value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The south polar opaque cloud fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: spolar_opaquecloud_frac_max (Type is String) fullnamepath: /quality_assessment/atmosphere/spolar_opaquecloud_frac_max (Type is String) quality_assessment_atmosphere_spolar_midcloud_frac_max[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: south polar middle (> 4km and <= 8km) cloud fraction maximum value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The south polar middle (> 4km and <= 8km) cloud fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: spolar_midcloud_frac_max (Type is String) fullnamepath: /quality_assessment/atmosphere/spolar_midcloud_frac_max (Type is String) quality_assessment_atmosphere_npolar_transcloud_frac_max[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: north polar transmissive cloud fraction maximum value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The north polar transmissive cloud fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: npolar_transcloud_frac_max (Type is String) fullnamepath: /quality_assessment/atmosphere/npolar_transcloud_frac_max (Type is String) quality_assessment_atmosphere_global_asr_min[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: global apparent surface reflectance minimum value (Type is String) units: 1 (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 3.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The global apparent surface reflectance gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.08103633). (Type is String) origname: global_asr_min (Type is String) fullnamepath: /quality_assessment/atmosphere/global_asr_min (Type is String) quality_assessment_atmosphere_npolar_asr_mean[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: north polar apparent surface reflectance mean value (Type is String) units: 1 (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 3.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The north polar apparent surface reflectance gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.08103633). (Type is String) origname: npolar_asr_mean (Type is String) fullnamepath: /quality_assessment/atmosphere/npolar_asr_mean (Type is String) quality_assessment_atmosphere_spolar_lorate_blowing_snow_freq_max[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: south polar low-rate blowing snow frequency maximum value (Type is String) units: percent (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 100.0000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The south polar low-rate blowing snow frequency gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. (Type is String) origname: spolar_lorate_blowing_snow_freq_max (Type is String) fullnamepath: /quality_assessment/atmosphere/spolar_lorate_blowing_snow_freq_max (Type is String) quality_assessment_atmosphere_npolar_highcloud_frac_min[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: north polar high (> 8km) cloud fraction minimum value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The north polar high (> 8km) cloud fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: npolar_highcloud_frac_min (Type is String) fullnamepath: /quality_assessment/atmosphere/npolar_highcloud_frac_min (Type is String) quality_assessment_atmosphere_npolar_hirate_blowing_snow_freq_max[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: north polar high-rate blowing snow frequency maximum value (Type is String) units: percent (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 100.0000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The north polar high-rate blowing snow frequency gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. (Type is String) origname: npolar_hirate_blowing_snow_freq_max (Type is String) fullnamepath: /quality_assessment/atmosphere/npolar_hirate_blowing_snow_freq_max (Type is String) quality_assessment_atmosphere_global_grnd_detect_min[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: global ground detection frequency minimum value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The global ground detection frequency gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: global_grnd_detect_min (Type is String) fullnamepath: /quality_assessment/atmosphere/global_grnd_detect_min (Type is String) quality_assessment_atmosphere_spolar_asr_sdev[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: south polar apparent surface reflectance standard deviation value (Type is String) units: 1 (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 3.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The south polar apparent surface reflectance gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.08103633). (Type is String) origname: spolar_asr_sdev (Type is String) fullnamepath: /quality_assessment/atmosphere/spolar_asr_sdev (Type is String) quality_assessment_atmosphere_global_grnd_detect_max[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: global ground detection frequency maximum value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The global ground detection frequency gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: global_grnd_detect_max (Type is String) fullnamepath: /quality_assessment/atmosphere/global_grnd_detect_max (Type is String) quality_assessment_atmosphere_global_grnd_detect_sdev[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: global ground detection frequency standard deviation value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The global ground detection frequency gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: global_grnd_detect_sdev (Type is String) fullnamepath: /quality_assessment/atmosphere/global_grnd_detect_sdev (Type is String) quality_assessment_atmosphere_spolar_transcloud_frac_min[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: south polar transmissive cloud fraction minimum value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The south polar transmissive cloud fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: spolar_transcloud_frac_min (Type is String) fullnamepath: /quality_assessment/atmosphere/spolar_transcloud_frac_min (Type is String) quality_assessment_atmosphere_npolar_grnd_detect_sdev[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: north polar ground detection frequency standard deviation value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The north polar ground detection frequency gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: npolar_grnd_detect_sdev (Type is String) fullnamepath: /quality_assessment/atmosphere/npolar_grnd_detect_sdev (Type is String) quality_assessment_atmosphere_npolar_grnd_detect_max[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: north polar ground detection frequency maximum value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The north polar ground detection frequency gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: npolar_grnd_detect_max (Type is String) fullnamepath: /quality_assessment/atmosphere/npolar_grnd_detect_max (Type is String) quality_assessment_atmosphere_npolar_lowcloud_frac_sdev[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: north polar low (<= 4km) cloud fraction standard deviation value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The north polar low (<= 4km) cloud fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: npolar_lowcloud_frac_sdev (Type is String) fullnamepath: /quality_assessment/atmosphere/npolar_lowcloud_frac_sdev (Type is String) quality_assessment_atmosphere_npolar_lowcloud_frac_mean[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: north polar low (<= 4km) cloud fraction mean value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The north polar low (<= 4km) cloud fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: npolar_lowcloud_frac_mean (Type is String) fullnamepath: /quality_assessment/atmosphere/npolar_lowcloud_frac_mean (Type is String) quality_assessment_atmosphere_global_column_od_mean[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: global (over water) total column optical depth mean value (Type is String) units: 1 (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 4.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The global (over water) total column optical depth gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.5. Maximum value may exceed 1.5 (e.g., 2.57788515). (Type is String) origname: global_column_od_mean (Type is String) fullnamepath: /quality_assessment/atmosphere/global_column_od_mean (Type is String) quality_assessment_atmosphere_spolar_totalcloud_frac_max[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: south polar total cloud fraction maximum value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The south polar total cloud fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: spolar_totalcloud_frac_max (Type is String) fullnamepath: /quality_assessment/atmosphere/spolar_totalcloud_frac_max (Type is String) quality_assessment_atmosphere_npolar_opaquecloud_frac_mean[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: north polar opaque cloud fraction mean value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The north polar opaque cloud fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: npolar_opaquecloud_frac_mean (Type is String) fullnamepath: /quality_assessment/atmosphere/npolar_opaquecloud_frac_mean (Type is String) quality_assessment_atmosphere_npolar_opaquecloud_frac_max[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: north polar opaque cloud fraction maximum value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The north polar opaque cloud fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: npolar_opaquecloud_frac_max (Type is String) fullnamepath: /quality_assessment/atmosphere/npolar_opaquecloud_frac_max (Type is String) quality_assessment_atmosphere_global_column_od_max[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: global (over water) total column optical depth maximum value (Type is String) units: 1 (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 4.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The global (over water) total column optical depth gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.5. Maximum value may exceed 1.5 (e.g., 2.57788515). (Type is String) origname: global_column_od_max (Type is String) fullnamepath: /quality_assessment/atmosphere/global_column_od_max (Type is String) quality_assessment_atmosphere_npolar_asr_min[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: north polar apparent surface reflectance minimum value (Type is String) units: 1 (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 3.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The north polar apparent surface reflectance gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.08103633). (Type is String) origname: npolar_asr_min (Type is String) fullnamepath: /quality_assessment/atmosphere/npolar_asr_min (Type is String) quality_assessment_atmosphere_npolar_lowcloud_frac_max[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: north polar low (<= 4km) cloud fraction maximum value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The north polar low (<= 4km) cloud fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: npolar_lowcloud_frac_max (Type is String) fullnamepath: /quality_assessment/atmosphere/npolar_lowcloud_frac_max (Type is String) quality_assessment_atmosphere_npolar_opaquecloud_frac_min[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: north polar opaque cloud fraction minimum value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The north polar opaque cloud fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: npolar_opaquecloud_frac_min (Type is String) fullnamepath: /quality_assessment/atmosphere/npolar_opaquecloud_frac_min (Type is String) quality_assessment_atmosphere_npolar_transcloud_frac_min[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: north polar transmissive cloud fraction minimum value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The north polar transmissive cloud fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: npolar_transcloud_frac_min (Type is String) fullnamepath: /quality_assessment/atmosphere/npolar_transcloud_frac_min (Type is String) quality_assessment_atmosphere_global_column_od_sdev[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: global (over water) total column optical depth standard deviation value (Type is String) units: 1 (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 4.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The global (over water) total column optical depth gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.5. Maximum value may exceed 1.5 (e.g., 2.57788515). (Type is String) origname: global_column_od_sdev (Type is String) fullnamepath: /quality_assessment/atmosphere/global_column_od_sdev (Type is String) quality_assessment_atmosphere_spolar_lorate_blowing_snow_freq_min[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: south polar low-rate blowing snow frequency minimum value (Type is String) units: percent (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 100.0000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The south polar low-rate blowing snow frequency gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. (Type is String) origname: spolar_lorate_blowing_snow_freq_min (Type is String) fullnamepath: /quality_assessment/atmosphere/spolar_lorate_blowing_snow_freq_min (Type is String) quality_assessment_atmosphere_spolar_hirate_blowing_snow_freq_max[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: south polar high-rate blowing snow frequency maximum value (Type is String) units: percent (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 100.0000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The south polar high-rate blowing snow frequency gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. (Type is String) origname: spolar_hirate_blowing_snow_freq_max (Type is String) fullnamepath: /quality_assessment/atmosphere/spolar_hirate_blowing_snow_freq_max (Type is String) quality_assessment_atmosphere_spolar_lorate_blowing_snow_freq_mean[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: south polar low-rate blowing snow frequency mean value (Type is String) units: percent (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 100.0000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The south polar low-rate blowing snow frequency gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. (Type is String) origname: spolar_lorate_blowing_snow_freq_mean (Type is String) fullnamepath: /quality_assessment/atmosphere/spolar_lorate_blowing_snow_freq_mean (Type is String) quality_assessment_atmosphere_npolar_grnd_detect_mean[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: north polar ground detection frequency mean value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The north polar ground detection frequency gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: npolar_grnd_detect_mean (Type is String) fullnamepath: /quality_assessment/atmosphere/npolar_grnd_detect_mean (Type is String) quality_assessment_atmosphere_spolar_asr_mean[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: south polar apparent surface reflectance mean value (Type is String) units: 1 (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 3.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The south polar apparent surface reflectance gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.08103633). (Type is String) origname: spolar_asr_mean (Type is String) fullnamepath: /quality_assessment/atmosphere/spolar_asr_mean (Type is String) quality_assessment_atmosphere_global_column_od_min[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: global (over water) total column optical depth minimum value (Type is String) units: 1 (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 4.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The global (over water) total column optical depth gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.5. Maximum value may exceed 1.5 (e.g., 2.57788515). (Type is String) origname: global_column_od_min (Type is String) fullnamepath: /quality_assessment/atmosphere/global_column_od_min (Type is String) quality_assessment_atmosphere_npolar_lowcloud_frac_min[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: north polar low (<= 4km) cloud fraction minimum value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The north polar low (<= 4km) cloud fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: npolar_lowcloud_frac_min (Type is String) fullnamepath: /quality_assessment/atmosphere/npolar_lowcloud_frac_min (Type is String) quality_assessment_atmosphere_spolar_grnd_detect_min[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: south polar ground detection frequency minimum value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The south polar ground detection frequency gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: spolar_grnd_detect_min (Type is String) fullnamepath: /quality_assessment/atmosphere/spolar_grnd_detect_min (Type is String) quality_assessment_atmosphere_spolar_transcloud_frac_mean[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: south polar transmissive cloud fraction mean value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The south polar transmissive cloud fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: spolar_transcloud_frac_mean (Type is String) fullnamepath: /quality_assessment/atmosphere/spolar_transcloud_frac_mean (Type is String) quality_assessment_atmosphere_npolar_hirate_blowing_snow_freq_sdev[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: north polar high-rate blowing snow frequency standard deviation value (Type is String) units: percent (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 100.0000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The north polar high-rate blowing snow frequency gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. (Type is String) origname: npolar_hirate_blowing_snow_freq_sdev (Type is String) fullnamepath: /quality_assessment/atmosphere/npolar_hirate_blowing_snow_freq_sdev (Type is String) quality_assessment_atmosphere_global_cloud_frac_min[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: global cloud fraction minimum value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The global cloud fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: global_cloud_frac_min (Type is String) fullnamepath: /quality_assessment/atmosphere/global_cloud_frac_min (Type is String) quality_assessment_atmosphere_npolar_midcloud_frac_sdev[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: north polar middle (> 4km and <= 8km) cloud fraction standard deviation value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The north polar middle (> 4km and <= 8km) cloud fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: npolar_midcloud_frac_sdev (Type is String) fullnamepath: /quality_assessment/atmosphere/npolar_midcloud_frac_sdev (Type is String) quality_assessment_atmosphere_global_asr_max[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: global apparent surface reflectance maximum value (Type is String) units: 1 (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 3.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The global apparent surface reflectance gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.08103633). (Type is String) origname: global_asr_max (Type is String) fullnamepath: /quality_assessment/atmosphere/global_asr_max (Type is String) quality_assessment_atmosphere_spolar_lowcloud_frac_max[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: south polar low (<= 4km) cloud fraction maximum value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The south polar low (<= 4km) cloud fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: spolar_lowcloud_frac_max (Type is String) fullnamepath: /quality_assessment/atmosphere/spolar_lowcloud_frac_max (Type is String) quality_assessment_atmosphere_npolar_hirate_blowing_snow_freq_min[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: north polar high-rate blowing snow frequency minimum value (Type is String) units: percent (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 100.0000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The north polar high-rate blowing snow frequency gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. (Type is String) origname: npolar_hirate_blowing_snow_freq_min (Type is String) fullnamepath: /quality_assessment/atmosphere/npolar_hirate_blowing_snow_freq_min (Type is String) quality_assessment_atmosphere_npolar_totalcloud_frac_min[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: north polar total cloud fraction minimum value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The north polar total cloud fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: npolar_totalcloud_frac_min (Type is String) fullnamepath: /quality_assessment/atmosphere/npolar_totalcloud_frac_min (Type is String) quality_assessment_atmosphere_global_aerosol_frac_max[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: global aerosol fraction maximum value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The global aerosol fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: global_aerosol_frac_max (Type is String) fullnamepath: /quality_assessment/atmosphere/global_aerosol_frac_max (Type is String) quality_assessment_atmosphere_global_cloud_frac_max[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: global cloud fraction maximum value (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The global cloud fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) units: fraction (Type is String) origname: global_cloud_frac_max (Type is String) fullnamepath: /quality_assessment/atmosphere/global_cloud_frac_max (Type is String) quality_assessment_atmosphere_npolar_lorate_blowing_snow_freq_min[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: north polar low-rate blowing snow frequency minimum value (Type is String) units: percent (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 100.0000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The north polar low-rate blowing snow frequency gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. (Type is String) origname: npolar_lorate_blowing_snow_freq_min (Type is String) fullnamepath: /quality_assessment/atmosphere/npolar_lorate_blowing_snow_freq_min (Type is String) quality_assessment_atmosphere_spolar_hirate_blowing_snow_freq_sdev[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: south polar high-rate blowing snow frequency standard deviation value (Type is String) units: percent (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 100.0000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The south polar high-rate blowing snow frequency gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. (Type is String) origname: spolar_hirate_blowing_snow_freq_sdev (Type is String) fullnamepath: /quality_assessment/atmosphere/spolar_hirate_blowing_snow_freq_sdev (Type is String) quality_assessment_atmosphere_spolar_hirate_blowing_snow_freq_min[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: south polar high-rate blowing snow frequency minimum value (Type is String) units: percent (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 100.0000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The south polar high-rate blowing snow frequency gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. (Type is String) origname: spolar_hirate_blowing_snow_freq_min (Type is String) fullnamepath: /quality_assessment/atmosphere/spolar_hirate_blowing_snow_freq_min (Type is String) quality_assessment_atmosphere_npolar_transcloud_frac_mean[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: north polar transmissive cloud fraction mean value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The north polar transmissive cloud fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: npolar_transcloud_frac_mean (Type is String) fullnamepath: /quality_assessment/atmosphere/npolar_transcloud_frac_mean (Type is String) quality_assessment_atmosphere_spolar_highcloud_frac_min[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: south polar high (> 8km) cloud fraction minimum value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The south polar high (> 8km) cloud fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: spolar_highcloud_frac_min (Type is String) fullnamepath: /quality_assessment/atmosphere/spolar_highcloud_frac_min (Type is String) quality_assessment_atmosphere_spolar_hirate_blowing_snow_freq_mean[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: south polar high-rate blowing snow frequency mean value (Type is String) units: percent (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 100.0000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The south polar high-rate blowing snow frequency gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. (Type is String) origname: spolar_hirate_blowing_snow_freq_mean (Type is String) fullnamepath: /quality_assessment/atmosphere/spolar_hirate_blowing_snow_freq_mean (Type is String) quality_assessment_atmosphere_global_cloud_frac_sdev[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: global cloud fraction standard deviation value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The global cloud fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: global_cloud_frac_sdev (Type is String) fullnamepath: /quality_assessment/atmosphere/global_cloud_frac_sdev (Type is String) quality_assessment_atmosphere_npolar_highcloud_frac_mean[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: north polar high (> 8km) cloud fraction mean value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The north polar high (> 8km) cloud fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: npolar_highcloud_frac_mean (Type is String) fullnamepath: /quality_assessment/atmosphere/npolar_highcloud_frac_mean (Type is String) quality_assessment_atmosphere_npolar_midcloud_frac_min[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: north polar middle (> 4km and <= 8km) cloud fraction minimum value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The north polar middle (> 4km and <= 8km) cloud fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: npolar_midcloud_frac_min (Type is String) fullnamepath: /quality_assessment/atmosphere/npolar_midcloud_frac_min (Type is String) quality_assessment_atmosphere_global_cloud_frac_mean[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: global cloud fraction mean value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The global cloud fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: global_cloud_frac_mean (Type is String) fullnamepath: /quality_assessment/atmosphere/global_cloud_frac_mean (Type is String) quality_assessment_atmosphere_spolar_asr_max[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: south polar apparent surface reflectance maximum value (Type is String) units: 1 (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 3.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The south polar apparent surface reflectance gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.08103633). (Type is String) origname: spolar_asr_max (Type is String) fullnamepath: /quality_assessment/atmosphere/spolar_asr_max (Type is String) quality_assessment_atmosphere_npolar_asr_sdev[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: north polar apparent surface reflectance standard deviation value (Type is String) units: 1 (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 3.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The north polar apparent surface reflectance gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.08103633). (Type is String) origname: npolar_asr_sdev (Type is String) fullnamepath: /quality_assessment/atmosphere/npolar_asr_sdev (Type is String) quality_assessment_atmosphere_spolar_grnd_detect_sdev[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: south polar ground detection frequency standard deviation value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The south polar ground detection frequency gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: spolar_grnd_detect_sdev (Type is String) fullnamepath: /quality_assessment/atmosphere/spolar_grnd_detect_sdev (Type is String) quality_assessment_atmosphere_npolar_midcloud_frac_mean[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: north polar middle (> 4km and <= 8km) cloud fraction mean value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The north polar middle (> 4km and <= 8km) cloud fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: npolar_midcloud_frac_mean (Type is String) fullnamepath: /quality_assessment/atmosphere/npolar_midcloud_frac_mean (Type is String) quality_assessment_atmosphere_npolar_totalcloud_frac_sdev[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: north polar total cloud fraction standard deviation value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The north polar total cloud fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: npolar_totalcloud_frac_sdev (Type is String) fullnamepath: /quality_assessment/atmosphere/npolar_totalcloud_frac_sdev (Type is String) quality_assessment_atmosphere_npolar_transcloud_frac_sdev[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: north polar transmissive cloud fraction standard deviation value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The north polar transmissive cloud fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: npolar_transcloud_frac_sdev (Type is String) fullnamepath: /quality_assessment/atmosphere/npolar_transcloud_frac_sdev (Type is String) quality_assessment_atmosphere_spolar_grnd_detect_max[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: south polar ground detection frequency maximum value (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: qualityInformation (Type is String) description: The south polar ground detection frequency gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. (Type is String) origname: spolar_grnd_detect_max (Type is String) fullnamepath: /quality_assessment/atmosphere/spolar_grnd_detect_max (Type is String) spolar_asr[ /spolar_grid_lat= 0..29] [ /spolar_grid_lon= 0..119] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) long_name: South Polar Apparent Surface Reflectance (0-1) (Type is String) units: 1 (Type is String) source: L3B ATM ATBD, Section 3.5, Section 5.0, Table 5. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: modelResult (Type is String) description: The south polar apparent surface reflectance (ASR) two-dimensional atmospheric gridded parameter. For each south polar grid cell this represents the ratio of the summation of the detected surface signal apparent surface reflectivity 25 Hz (high-rate profile) observations (apparent_surf_reflec () > 0.0) to the number of detected surface signal ASR 25 Hz (high-rate profile) observations (spolar_asr_obs_grid (i,j)) in the cell. The gridded average south polar ASR values are produced when the number of detected surface signal ASR 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (spolar_asr_obs_grid (i,j) => obs_minimum); otherwise set to INVALID. ASR represents the true surface reflectivity modified by the two-way atmospheric transmission. Generally a number between 0.0 and 1.0. ASR is related to the ratio of the received energy to the transmitted energy, assuming a Lambertian surface reflectance. The ATL09 required surface signal apparent surface reflectance (apparent_surf_reflec ()) values are determined in the L3A ATM high-rate profile processing. Grid array organization: spolar_asr (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given weekly polar_grid_lon_scale = 3.0 degrees and polar_grid_lat_scale = 1.0 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the weekly gridded array dimension: is spolar_asr (120,30), type: floating point. Reference: spolar_asr (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "spolar_asr_img" in the ATL16 product. The applicable south polar observation counts for this atmosphere gridded parameter are available from: spolar_asr_obs_grid (i,j). Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.08103633). Image will be limited to the range of 0.0 to 1.0. (Type is String) coordinates: spolar_grid_lon spolar_grid_lat (Type is String) origname: spolar_asr (Type is String) fullnamepath: /spolar_asr (Type is String) npolar_transcloud_frac_img[ /FakeDim4= 0..637] [ /FakeDim5= 0..561] [ /FakeDim3= 0..2] (Type is Byte) attributes CLASS: IMAGE (Type is String) IMAGE_VERSION: 1.2 (Type is String) IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String) INTERLACE_MODE: INTERLACE_PIXEL (Type is String) origname: npolar_transcloud_frac_img (Type is String) fullnamepath: /npolar_transcloud_frac_img (Type is String) global_column_od_img[ /FakeDim1= 0..723] [ /FakeDim2= 0..1026] [ /FakeDim3= 0..2] (Type is Byte) attributes CLASS: IMAGE (Type is String) IMAGE_VERSION: 1.2 (Type is String) IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String) INTERLACE_MODE: INTERLACE_PIXEL (Type is String) origname: global_column_od_img (Type is String) fullnamepath: /global_column_od_img (Type is String) delta_time_beg[ /FakeDim0= 0..0] (Type is Float64) attributes long_name: start time (Type is String) standard_name: time (Type is String) units: seconds since 2018-01-01 (Type is String) source: L3B ATM ATBD, Section 5.0, Table 5. (Type is String) contentType: auxiliaryInformation (Type is String) description: The start time scalar parameter (start_time). The start time/date of the data used to make the product. Number of GPS seconds since the ATLAS SDP epoch at the beginning of the data collection. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. Type: double precision. (Type is String) origname: delta_time_beg (Type is String) fullnamepath: /delta_time_beg (Type is String) npolar_midcloud_frac_img[ /FakeDim4= 0..637] [ /FakeDim5= 0..561] [ /FakeDim3= 0..2] (Type is Byte) attributes CLASS: IMAGE (Type is String) IMAGE_VERSION: 1.2 (Type is String) IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String) INTERLACE_MODE: INTERLACE_PIXEL (Type is String) origname: npolar_midcloud_frac_img (Type is String) fullnamepath: /npolar_midcloud_frac_img (Type is String) global_cloud_aerosol_obs_grid[ /global_grid_lat= 0..59] [ /global_grid_lon= 0..119] (Type is Float32) attributes long_name: global cloud and aerosol fraction observation grid (Type is String) units: 1 (Type is String) source: L3B ATM ATBD, Section 3.9, Table 4., Section 5.0, Table 5. (Type is String) contentType: modelResult (Type is String) description: The global cloud fraction and aerosol fraction observation count two-dimensional gridded parameter. The number of observations used to compute the global cloud fraction and the global aerosol fraction. This number represents all 25 Hz (high-rate profile) observations in each cell. Only 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1) in each grid cell are used to compute the cell global cloud fraction (global_cloud_frac (i,j)). Only 25 Hz (high-rate profile) observations with at least one aerosol layer (layer_attr (,) = 2) in each grid cell are used to compute the cell global aerosol fraction (global_aerosol_frac (i,j)). Given equivalent 25 Hz (high-rate profile) observation counts for cloud fraction and aerosol fraction, this grid array is loaded from the global cloud fraction total observation counts. Grid array organization: global_cloud_aerosol_obs_grid (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly global_grid_lon_scale = 3.0 degrees and the global_grid_lat_scale = 3.0 degrees, the weekly global gridded array dimension is: global_cloud_aerosol_obs_grid (120,60), type: floating point. Reference: global_cloud_aerosol_obs_grid (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the global projection array. The global observation counts are applicable to these atmosphere gridded parameters: global_cloud_frac (i,j), global_aerosol_frac (i,j), and global_grnd_detect (i,j). (Type is String) coordinates: global_grid_lon global_grid_lat (Type is String) origname: global_cloud_aerosol_obs_grid (Type is String) fullnamepath: /global_cloud_aerosol_obs_grid (Type is String) npolar_lorate_blowing_snow_freq[ /npolar_grid_lat= 0..29] [ /npolar_grid_lon= 0..119] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) long_name: North Polar Low-Rate Blowing Snow Frequency (percent) (Type is String) units: percent (Type is String) source: L3B ATM ATBD, Section 3.4, Section 5.0, Table 5. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 100.0000000 (Type is Float32) contentType: modelResult (Type is String) description: The north polar low-rate blowing snow frequency two-dimensional atmospheric gridded parameter. For each north polar grid cell this represents the ratio of the number of the valid detected blowing snow layer top height 1 Hz (low-rate profile) observations (bsnow_h () .ne. INVALID and bsnow_h () > 0.0) to the number of valid blowing snow confidence flag (bsnow_con () .ne. INVALID, exceeds the surface not detected value, i.e., bsnow_con () > -3, and is implemented as bsnow_con () => -2) 1 Hz (low-rate profile) observations (npolar_lorate_bsnow_obs_grid (i,j)); the ratio is multiplied by 100.0 to obtain percent. The gridded north polar low-rate blowing snow frequency values are produced when the number of valid blowing snow confidence flag 1 Hz (low-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (npolar_lorate_bsnow_obs_grid (i,j) => obs_minimum); otherwise set to INVALID. The ATL09 required blowing snow height (bsnow_h ()) and blowing snow confidence (bsnow_con ()) values are determined in the L3A ATM low-rate profile processing. Grid array organization: npolar_lorate_blowing_snow_freq (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the weekly gridded array dimension is: npolar_lorate_blowing_snow_freq (120,30), type: floating point. Reference: npolar_lorate_blowing_snow_freq (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "npolar_lorate_blowing_snow_freq_img" in the ATL16 product. The applicable north polar observation counts for this atmosphere gridded parameter are available from: npolar_lorate_bsnow_obs_grid (i,j). Value range: minimum: 0.0, maximum: 100.0. (Type is String) coordinates: npolar_grid_lon npolar_grid_lat (Type is String) origname: npolar_lorate_blowing_snow_freq (Type is String) fullnamepath: /npolar_lorate_blowing_snow_freq (Type is String) global_asr[ /global_grid_lat= 0..59] [ /global_grid_lon= 0..119] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) long_name: Global Apparent Surface Reflectance (0-1) (Type is String) units: 1 (Type is String) source: L3B ATM ATBD, Section 3.5, Section 5.0, Table 5. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: modelResult (Type is String) description: The global average apparent surface reflectance (ASR) two-dimensional atmospheric gridded parameter. For each global grid cell this represents the ratio of the summation of the detected surface signal apparent surface reflectivity 25 Hz (high-rate profile) observations (apparent_surf_reflec () > 0.0) to the number of detected surface signal ASR 25 Hz (high-rate profile) observations (global_asr_obs_grid (i,j)) in the cell. The gridded average global ASR values are produced when the number of detected surface signal ASR 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (global_asr_obs_grid (i,j) => obs_minimum); otherwise set to INVALID. ASR represents the true surface reflectivity modified by the two-way atmospheric transmission. Generally a number between 0.0 and 1.0. ASR is related to the ratio of the received energy to the transmitted energy, assuming a Lambertian surface reflectance. The ATL09 required surface signal apparent surface reflectance (apparent_surf_reflec ()) values are determined in the L3A ATM high-rate profile processing. Grid array organization: global_asr (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly global_grid_lon_scale = 3.0 degrees and the global_grid_lat_scale = 3.0 degrees, the gridded array dimension is: global_asr (120,60), type: floating point. Reference: global_asr (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the global projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "global_asr_img" in the ATL16 product. The applicable global observation counts for this atmosphere gridded parameter are available from: global_asr_obs_grid (i,j). Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.08103633). Image will be limited to the range of 0.0 to 1.0. (Type is String) coordinates: global_grid_lon global_grid_lat (Type is String) origname: global_asr (Type is String) fullnamepath: /global_asr (Type is String) npolar_totalcloud_frac_img[ /FakeDim4= 0..637] [ /FakeDim5= 0..561] [ /FakeDim3= 0..2] (Type is Byte) attributes CLASS: IMAGE (Type is String) IMAGE_VERSION: 1.2 (Type is String) IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String) INTERLACE_MODE: INTERLACE_PIXEL (Type is String) origname: npolar_totalcloud_frac_img (Type is String) fullnamepath: /npolar_totalcloud_frac_img (Type is String) spolar_asr_img[ /FakeDim4= 0..637] [ /FakeDim5= 0..561] [ /FakeDim3= 0..2] (Type is Byte) attributes CLASS: IMAGE (Type is String) IMAGE_VERSION: 1.2 (Type is String) IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String) INTERLACE_MODE: INTERLACE_PIXEL (Type is String) origname: spolar_asr_img (Type is String) fullnamepath: /spolar_asr_img (Type is String) spolar_totalcloud_frac_img[ /FakeDim4= 0..637] [ /FakeDim5= 0..561] [ /FakeDim3= 0..2] (Type is Byte) attributes CLASS: IMAGE (Type is String) IMAGE_VERSION: 1.2 (Type is String) IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String) INTERLACE_MODE: INTERLACE_PIXEL (Type is String) origname: spolar_totalcloud_frac_img (Type is String) fullnamepath: /spolar_totalcloud_frac_img (Type is String) npolar_opaquecloud_frac[ /npolar_grid_lat= 0..29] [ /npolar_grid_lon= 0..119] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) long_name: North Polar Opaque Cloud Fraction (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.3.2, Section 5.0, Table 5. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: modelResult (Type is String) description: The north polar opaque cloud fraction two-dimensional atmospheric gridded parameter. For each north polar cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1 within cloud_flag_atm () layers) without surface signal detection (surface_sig () = 0.0) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded north polar opaque cloud fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The fraction of opaque clouds covering the entire grid cell. Opaque clouds are clouds that inhibit or absorb transmission of downward radiation through the cloud. The cloud layer with opaque characteristics exhibits no surface signal count return (=0.0), indicating that no transmitted photons reached the surface. The ATL09 required number of layers (cloud_flag_atm ()) and the layer attribute flag (layer_attr (,)) are determined from the backscatter profile using the DDA layer finder, and the required surface signal (surface_sig ()) is determined from the surface signal count of the number of photons in the detected surface bin, all in the L3A ATM high-rate profile processing. Grid array organization: npolar_opaquecloud_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the weekly gridded array dimension is: npolar_opaquecloud_frac (120,30), type: floating point. Reference: npolar_opaquecloud_frac (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "npolar_opaquecloud_frac_img" in the ATL16 product. The applicable north polar observation counts for this atmosphere gridded parameter are available from: npolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. (Type is String) coordinates: npolar_grid_lon npolar_grid_lat (Type is String) origname: npolar_opaquecloud_frac (Type is String) fullnamepath: /npolar_opaquecloud_frac (Type is String) spolar_highcloud_frac[ /spolar_grid_lat= 0..29] [ /spolar_grid_lon= 0..119] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) long_name: South Polar High Cloud Fraction (> 8km) (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.3.1, Section 5.0, Table 5. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: modelResult (Type is String) description: The south polar high (> 8km) cloud fraction two-dimensional atmospheric gridded parameter. For each south polar grid cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1 within cloud_flag_atm () layers) that occurs above 8 km from the layer top (layer_top (,) > 8.0 within cloud_flag_atm () layers) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded south polar high cloud fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The ATL09 required number of layers (cloud_flag_atm ()), the layer attribute flag (layer_attr (,)), and the height of the detected layers (layer_top (,)) are determined from the backscatter profile using the DDA layer finder in the L3A ATM high-rate profile processing. Grid array organization: spolar_highcloud_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the weekly gridded array dimension is: spolar_highcloud_frac (120,30), type: floating point. Reference: spolar_highcloud_frac (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "spolar_highcloud_frac_img" in the ATL16 product. The applicable south polar observation counts for this atmosphere gridded parameter are available from: spolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. (Type is String) coordinates: spolar_grid_lon spolar_grid_lat (Type is String) origname: spolar_highcloud_frac (Type is String) fullnamepath: /spolar_highcloud_frac (Type is String) spolar_hirate_blowing_snow_freq[ /spolar_grid_lat= 0..29] [ /spolar_grid_lon= 0..119] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) long_name: South Polar High-Rate Blowing Snow Frequency (percent) (Type is String) units: percent (Type is String) source: L3B ATM ATBD, Section 3.4, Section 5.0, Table 5. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 100.0000000 (Type is Float32) contentType: modelResult (Type is String) description: The south polar high-rate blowing snow frequency two-dimensional atmospheric gridded parameter. For each south polar grid cell this represents the ratio of the number of the valid detected blowing snow layer top height 25 Hz (high-rate profile) observations (bsnow_h () .ne. INVALID and bsnow_h () > 0.0) to the number of valid blowing snow confidence flag (bsnow_con () .ne. INVALID, exceeds the surface not detected value, i.e., bsnow_con () > -3, and is implemented as bsnow_con () => -2) 25 Hz (high-rate profile) observations (spolar_hirate_bsnow_obs_grid (i,j)); the ratio is multiplied by 100.0 to obtain percent. The gridded south polar high-rate blowing snow frequency values are produced when the number of valid blowing snow confidence flag 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (spolar_hirate_bsnow_obs_grid (i,j) => obs_minimum); otherwise set to INVALID. The ATL09 required blowing snow height (bsnow_h ()) and blowing snow confidence (bsnow_con ()) values are determined in the L3A ATM high-rate profile processing. Grid array organization: spolar_hirate_blowing_snow_freq (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the weekly gridded array dimension is: spolar_hirate_blowing_snow_freq (120,30), type: floating point. Reference: spolar_hirate_blowing_snow_freq (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "spolar_hirate_blowing_snow_freq_img" in the ATL16 product. The applicable south polar observation counts for this atmosphere gridded parameter are available from: spolar_hirate_bsnow_obs_grid (i,j). Value range: minimum: 0.0, maximum: 100.0. (Type is String) coordinates: spolar_grid_lon spolar_grid_lat (Type is String) origname: spolar_hirate_blowing_snow_freq (Type is String) fullnamepath: /spolar_hirate_blowing_snow_freq (Type is String) npolar_asr[ /npolar_grid_lat= 0..29] [ /npolar_grid_lon= 0..119] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) long_name: North Polar Apparent Surface Reflectance (0-1) (Type is String) units: 1 (Type is String) source: L3B ATM ATBD, Section 3.5, Section 5.0, Table 5. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: modelResult (Type is String) description: The north polar apparent surface reflectance (ASR) two-dimensional atmospheric gridded parameter. For each north polar grid cell this represents the ratio of the summation of the detected surface signal apparent surface reflectivity 25 Hz (high-rate profile) observations (apparent_surf_reflec () > 0.0) to the number of detected surface signal ASR 25 Hz (high-rate profile) observations (npolar_asr_obs_grid (i,j)) in the cell. The gridded average north polar ASR values are produced when the number of detected surface signal ASR 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (npolar_asr_obs_grid (i,j) => obs_minimum); otherwise set to INVALID. ASR represents the true surface reflectivity modified by the two-way atmospheric transmission. Generally a number between 0.0 and 1.0. ASR is related to the ratio of the received energy to the transmitted energy, assuming a Lambertian surface reflectance. The ATL09 required surface signal apparent surface reflectance (apparent_surf_reflec ()) values are determined in the L3A ATM high-rate profile processing. Grid array organization: npolar_asr (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given weekly polar_grid_lon_scale = 3.0 degrees and polar_grid_lat_scale = 1.0 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the gridded array dimension: is npolar_asr (120,30), type: floating point. Reference: npolar_asr (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "npolar_asr_img" in the ATL16 product. The applicable north polar observation counts for this atmosphere gridded parameter are available from: npolar_asr_obs_grid (i,j). Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.19374275). Image will be limited to the range of 0.0 to 1.0. (Type is String) coordinates: npolar_grid_lon npolar_grid_lat (Type is String) origname: npolar_asr (Type is String) fullnamepath: /npolar_asr (Type is String) spolar_lorate_bsnow_obs_grid[ /spolar_grid_lat= 0..29] [ /spolar_grid_lon= 0..119] (Type is Float32) attributes long_name: south polar low-rate blowing snow frequency observation grid (Type is String) units: 1 (Type is String) source: L3B ATM ATBD, Section 3.9, Table 4., Section 5.0, Table 5. (Type is String) contentType: modelResult (Type is String) description: The south polar low-rate blowing snow observation count two-dimensional gridded parameter. The number of low-rate profile blowing snow observations used in the computation of low-rate blowing snow frequency for the Antarctic. For each south polar grid cell this represents the number of valid blowing snow confidence 1 Hz (low-rate profile) observations (bsnow_con () .ne. INVALID), where the low-rate profile blowing snow confidence value exceeds the surface not detected value (bsnow_con () > -3, and is actually implemented as bsnow_con () => -2). Only valid detected blowing snow layer top height 1 Hz (low-rate profile) observations (bsnow_h () .ne. INVALID and bsnow_h () > 0.0) and only valid blowing snow confidence 1 Hz (low-rate profile) observations (bsnow_con () .ne. INVALID), where the low-rate blowing snow confidence value exceeds the surface not detected value (bsnow_con () > -3, and is implemented as bsnow_con () => -2) in each grid cell are used to compute the cell south polar low-rate blowing snow frequency (spolar_lorate_blowing_snow_freq (i,j)). Grid array organization: spolar_lorate_bsnow_obs_grid (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the weekly gridded array dimension is: spolar_lorate_bsnow_obs_grid (120,30), type: floating point. Reference: spolar_lorate_bsnow_obs_grid (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. The south polar observation counts are applicable to the atmosphere gridded parameter: spolar_lorate_blowing_snow_freq (i,j). (Type is String) coordinates: spolar_grid_lon spolar_grid_lat (Type is String) origname: spolar_lorate_bsnow_obs_grid (Type is String) fullnamepath: /spolar_lorate_bsnow_obs_grid (Type is String) npolar_asr_img[ /FakeDim4= 0..637] [ /FakeDim5= 0..561] [ /FakeDim3= 0..2] (Type is Byte) attributes CLASS: IMAGE (Type is String) IMAGE_VERSION: 1.2 (Type is String) IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String) INTERLACE_MODE: INTERLACE_PIXEL (Type is String) origname: npolar_asr_img (Type is String) fullnamepath: /npolar_asr_img (Type is String) spolar_midcloud_frac[ /spolar_grid_lat= 0..29] [ /spolar_grid_lon= 0..119] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) long_name: South Polar Mid Cloud Fraction (> 4km and <= 8km) (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.3.1, Section 5.0, Table 5. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: modelResult (Type is String) description: The south polar middle (> 4km and <= 8km) cloud fraction two-dimensional atmospheric gridded parameter. For each south polar grid cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1 within cloud_flag_atm () layers) that occurs above 4 km and up to and including 8 km from the layer top (layer_top (,) > 4.0 and <= 8.0 within cloud_flag_atm () layers) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded south polar middle cloud fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The ATL09 required number of layers (cloud_flag_atm ()), the layer attribute flag (layer_attr (,)), and the height of the detected layers (layer_top (,)) are determined from the backscatter profile using the DDA layer finder in the L3A ATM high-rate profile processing. Grid array organization: spolar_midcloud_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the weekly gridded array dimension is: spolar_midcloud_frac (120,30), type: floating point. Reference: spolar_midcloud_frac (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "spolar_midcloud_frac_img" in the ATL16 product. The applicable south polar observation counts for this atmosphere gridded parameter are available from: spolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. (Type is String) coordinates: spolar_grid_lon spolar_grid_lat (Type is String) origname: spolar_midcloud_frac (Type is String) fullnamepath: /spolar_midcloud_frac (Type is String) ancillary_data_release[ /FakeDim0= 0..0] (Type is String) attributes long_name: Release Number (Type is String) units: 1 (Type is String) source: Operations (Type is String) contentType: auxiliaryInformation (Type is String) description: Release number of the granule. The release number is incremented when the software or ancillary data used to create the granule has been changed. Type: character string. (Type is String) origname: release (Type is String) fullnamepath: /ancillary_data/release (Type is String) ancillary_data_end_geoseg[ /FakeDim0= 0..0] (Type is Int32) attributes long_name: Ending Geolocation Segment (Type is String) units: 1 (Type is String) source: Derived (Type is String) contentType: auxiliaryInformation (Type is String) description: The ending geolocation segment number associated with the data contained within this granule. ICESat-2 granule geographic regions are further refined by geolocation segments. During the geolocation process, a geolocation segment is created approximately every 20m from the start of the orbit to the end. The geolocation segments help align the ATLAS strong a weak beams and provide a common segment length for the L2 and higher products. The geolocation segment indices differ slightly from orbit-to-orbit because of the irregular shape of the Earth. The geolocation segment indices on ATL01 and ATL02 are only approximate because beams have not been aligned at the time of their creation. Type: integer. (Type is String) origname: end_geoseg (Type is String) fullnamepath: /ancillary_data/end_geoseg (Type is String) ancillary_data_version[ /FakeDim0= 0..0] (Type is String) attributes long_name: Version (Type is String) units: 1 (Type is String) source: Operations (Type is String) contentType: auxiliaryInformation (Type is String) description: Version number of this granule within the release. It is a sequential number corresponding to the number of times the granule has been reprocessed for the current release. Type: character string. (Type is String) origname: version (Type is String) fullnamepath: /ancillary_data/version (Type is String) ancillary_data_end_region[ /FakeDim0= 0..0] (Type is Int32) attributes long_name: Ending Region (Type is String) units: 1 (Type is String) source: Derived (Type is String) contentType: auxiliaryInformation (Type is String) description: The ending product-specific region number associated with the data contained within this granule. ICESat-2 data products are separated by geographic regions. The data contained within a specific region are the same for ATL01 and ATL02. ATL03 regions differ slightly because of different geolocation segment locations caused by the irregular shape of the Earth. The region indices for other products are completely independent. Type: integer. (Type is String) origname: end_region (Type is String) fullnamepath: /ancillary_data/end_region (Type is String) ancillary_data_atmosphere_center_weight[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: gridded image smoothing center weight factor (Type is String) units: 1 (Type is String) source: L3B ATM ATBD, Section 4.0, Section 5.0, Table 6. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: referenceInformation (Type is String) description: The center_weight is a scalar control parameter. When the gridded image data parameters are smoothed, the center weight value is used to calculate the weight factor used to scale each cell in the smoothed image production. The nominal [default] center_weight value is 0.6. An execution override is provided within the production environment for replacement of the control parameter value. Type: floating point. (Type is String) origname: center_weight (Type is String) fullnamepath: /ancillary_data/atmosphere/center_weight (Type is String) ancillary_data_atmosphere_data_type_flag[ /FakeDim0= 0..0] (Type is Int8) attributes long_name: data type flag control (Type is String) units: 1 (Type is String) source: L3B ATM ATBD, Section 1.0, Section 5.0, Table 6. (Type is String) contentType: referenceInformation (Type is String) description: The data type flag is a scalar control parameter. The data_type_flag value =0 [default] indicates both night and day data were used to generate the product; the data_type_flag value =1 indicates night-only data were used to generate the product. An execution override is provided within the production environment for replacement of the control parameter value. Type: integer1. (Type is String) flag_meanings: process_both_day_and_night_profile_data_DEFAULT process_night_only_profile_data (Type is String) flag_values: 0, 1 (Type is Int8) origname: data_type_flag (Type is String) fullnamepath: /ancillary_data/atmosphere/data_type_flag (Type is String) ancillary_data_atmosphere_global_grid_lat_scale[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: global grid latitude scale control (Type is String) units: degrees/cell (Type is String) source: L3B ATM ATBD, Section 1.0, Table 2., Section 5.0, Table 6. (Type is String) contentType: referenceInformation (Type is String) description: The global_grid_lat_scale is a scalar control parameter presenting the global grid cell latitude resolution (scale), in degrees per cell. The nominal [default] global_grid_lat_scale value is 3.0 degrees global latitude grid cell size for the weekly ATL16 product. An execution override is provided within the production environment for replacement of the control parameter value. Type: floating point. (Type is String) origname: global_grid_lat_scale (Type is String) fullnamepath: /ancillary_data/atmosphere/global_grid_lat_scale (Type is String) ancillary_data_atmosphere_global_grid_lon_scale[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: global grid longitude scale control (Type is String) units: degrees/cell (Type is String) source: L3B ATM ATBD, Section 1.0, Table 2., Section 5.0, Table 6. (Type is String) contentType: referenceInformation (Type is String) description: The global_grid_lon_scale is a scalar control parameter presenting the global grid cell longitude resolution (scale), in degrees per cell. The nominal [default] global_grid_lon_scale value is 3.0 degrees global longitude grid cell size for the weekly ATL16 product. An execution override is provided within the production environment for replacement of the control parameter value. Type: floating point. (Type is String) origname: global_grid_lon_scale (Type is String) fullnamepath: /ancillary_data/atmosphere/global_grid_lon_scale (Type is String) ancillary_data_atmosphere_obs_minimum[ /FakeDim0= 0..0] (Type is Int8) attributes long_name: observation count minimum value control (Type is String) units: 1 (Type is String) source: L3B ATM ATBD, Section 3.8, Section 5.0, Table 6. (Type is String) contentType: referenceInformation (Type is String) description: The obs_minimum is a scalar control parameter Indicating the minimum acceptable observation count value required to compute the specific atmosphere parameter grid cell value based on the observation count in the corresponding parameter denominator cell to be used in the rational calculation. The nominal [default] obs_minimum value is 2 for the weekly minimum observation cell count for the ATL16 product. An execution override is provided within the production environment for replacement of the control parameter value. Type: integer1. (Type is String) origname: obs_minimum (Type is String) fullnamepath: /ancillary_data/atmosphere/obs_minimum (Type is String) ancillary_data_atmosphere_polar_grid_lat_scale[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: polar grid latitude scale control (Type is String) units: degrees/cell (Type is String) source: L3B ATM ATBD, Section 1.0, Table 2., Section 5.0, Table 6. (Type is String) contentType: referenceInformation (Type is String) description: The polar_grid_lat_scale is a scalar control parameter presenting the north or south polar grid latitude resolution (scale), in degrees per cell. The nominal [default] polar_grid_lat_scale value is 1.0 degrees polar latitude grid cell size for the weekly ATL16 product. An execution override is provided within the production environment for replacement of the control parameter value. Type: floating point. (Type is String) origname: polar_grid_lat_scale (Type is String) fullnamepath: /ancillary_data/atmosphere/polar_grid_lat_scale (Type is String) ancillary_data_atmosphere_polar_grid_lon_scale[ /FakeDim0= 0..0] (Type is Float32) attributes long_name: polar grid longitude scale control (Type is String) units: degrees/cell (Type is String) source: L3B ATM ATBD, Section 1.0, Table 2., Section 5.0, Table 6. (Type is String) contentType: referenceInformation (Type is String) description: The polar_grid_lon_scale is a scaler control parameter presenting the north or south polar longitude grid resolution (scale), in degrees per cell. The nominal [default] polar_grid_lon_scale value is 3.0 degrees polar longitude grid cell size for the weekly ATL16 product. An execution override is provided within the production environment for replacement of the control parameter value. Type: floating point. (Type is String) origname: polar_grid_lon_scale (Type is String) fullnamepath: /ancillary_data/atmosphere/polar_grid_lon_scale (Type is String) ancillary_data_atmosphere_smooth_grid[ /FakeDim0= 0..0] (Type is Int8) attributes long_name: global and polar gridded image smoothing control (Type is String) units: 1 (Type is String) source: L3B ATM ATBD, Section 4.0, Section 5.0, Table 6. (Type is String) valid_min: 0 (Type is Int8) valid_max: 1 (Type is Int8) contentType: referenceInformation (Type is String) description: The smooth_grid is a scalar control parameter for the application of the Section 4.0 smoothing algorithm to the product global, north polar, and south polar Images. The nominal [default] smooth_grid value set to 1 indicates to apply the smoothing algorithm to the data used to generate the images; the smooth_grid value set to 0 indicates do not apply the smoothing algorithm to the data used to generate the images. When image gridded data smoothing is selected the smoothing algorithm is applied to intermediate working data arrays for each parameter, and is NOT applied to the actual product gridded parameter arrays content (i.e., the gridded data parameters remain un-smoothed). An execution override is provided within the production environment for replacement of the control parameter value. Type: integer*1. (Type is String) flag_meanings: apply_smoothing_to_image_data_DEFAULT do_not_apply_smoothing_to_image_data (Type is String) flag_values: 1, 0 (Type is Int8) origname: smooth_grid (Type is String) fullnamepath: /ancillary_data/atmosphere/smooth_grid (Type is String) ancillary_data_atlas_sdp_gps_epoch[ /FakeDim0= 0..0] (Type is Float64) attributes long_name: ATLAS Epoch Offset (Type is String) units: seconds since 1980-01-06T00:00:00.000000Z (Type is String) source: Operations (Type is String) contentType: auxiliaryInformation (Type is String) description: Number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS Standard Data Product (SDP) epoch (2018-01-01:T00.00.00.000000 UTC). Add this value to delta time parameters to compute full gps_seconds (relative to the GPS epoch) for each data point. Type: double precision. (Type is String) origname: atlas_sdp_gps_epoch (Type is String) fullnamepath: /ancillary_data/atlas_sdp_gps_epoch (Type is String) ancillary_data_end_rgt[ /FakeDim0= 0..0] (Type is Int32) attributes long_name: Ending Reference Groundtrack (Type is String) units: 1 (Type is String) source: Derived (Type is String) valid_min: 1 (Type is Int32) valid_max: 1387 (Type is Int32) contentType: auxiliaryInformation (Type is String) description: The ending reference ground track (RGT) number associated with the data contained within this granule. There are 1387 reference ground track in the ICESat-2 repeat orbit. The reference ground track increments each time the spacecraft completes a full orbit of the Earth and resets to 1 each time the spacecraft completes a full cycle. Type: integer. (Type is String) origname: end_rgt (Type is String) fullnamepath: /ancillary_data/end_rgt (Type is String) ancillary_data_end_delta_time[ /FakeDim0= 0..0] (Type is Float64) attributes long_name: ATLAS End Time (Actual) (Type is String) standard_name: time (Type is String) units: seconds since 2018-01-01 (Type is String) source: Derived (Type is String) contentType: auxiliaryInformation (Type is String) description: Number of GPS seconds since the ATLAS SDP epoch at the last data point in the file. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. Type: double precision. (Type is String) origname: end_delta_time (Type is String) fullnamepath: /ancillary_data/end_delta_time (Type is String) ancillary_data_end_orbit[ /FakeDim0= 0..0] (Type is Int32) attributes long_name: Ending Orbit Number (Type is String) units: 1 (Type is String) source: Derived (Type is String) contentType: auxiliaryInformation (Type is String) description: The ending orbit number associated with the data contained within this granule. The orbit number increments each time the spacecraft completes a full orbit of the Earth. Type: integer. (Type is String) origname: end_orbit (Type is String) fullnamepath: /ancillary_data/end_orbit (Type is String) ancillary_data_start_cycle[ /FakeDim0= 0..0] (Type is Int32) attributes long_name: Starting Cycle (Type is String) units: 1 (Type is String) source: Derived (Type is String) valid_min: 0 (Type is Int32) valid_max: 99 (Type is Int32) contentType: auxiliaryInformation (Type is String) description: The starting cycle number associated with the data contained within this granule. The cycle number is the counter of the number of 91-day repeat cycles completed by the mission. Type: integer. (Type is String) origname: start_cycle (Type is String) fullnamepath: /ancillary_data/start_cycle (Type is String) ancillary_data_data_end_utc[ /FakeDim0= 0..0] (Type is String) attributes long_name: End UTC Time of Granule (CCSDS-A, Actual) (Type is String) units: 1 (Type is String) source: Derived (Type is String) contentType: auxiliaryInformation (Type is String) description: UTC (in CCSDS-A format) of the last data point within the granule. Type: character string. (Type is String) origname: data_end_utc (Type is String) fullnamepath: /ancillary_data/data_end_utc (Type is String) ancillary_data_control[ /FakeDim0= 0..0] (Type is String) attributes long_name: Control File (Type is String) units: 1 (Type is String) source: Operations (Type is String) contentType: auxiliaryInformation (Type is String) description: PGE-specific control file used to generate this granule. To re-use, replace breaks (BR) with linefeeds. Type: character string. (Type is String) origname: control (Type is String) fullnamepath: /ancillary_data/control (Type is String) ancillary_data_start_gpssow[ /FakeDim0= 0..0] (Type is Float64) attributes long_name: Start GPS SOW of Granule (Actual) (Type is String) units: seconds (Type is String) source: Derived (Type is String) contentType: auxiliaryInformation (Type is String) description: GPS seconds-of-week of the first data point in the granule. Type: double precision. (Type is String) origname: start_gpssow (Type is String) fullnamepath: /ancillary_data/start_gpssow (Type is String) ancillary_data_granule_end_utc[ /FakeDim0= 0..0] (Type is String) attributes long_name: End UTC Time of Granule (CCSDS-A, Requested) (Type is String) units: 1 (Type is String) source: Derived (Type is String) contentType: auxiliaryInformation (Type is String) description: Requested end time (in UTC CCSDS-A) of this granule. Type: character string. (Type is String) origname: granule_end_utc (Type is String) fullnamepath: /ancillary_data/granule_end_utc (Type is String) ancillary_data_end_cycle[ /FakeDim0= 0..0] (Type is Int32) attributes long_name: Ending Cycle (Type is String) units: 1 (Type is String) source: Derived (Type is String) valid_min: 0 (Type is Int32) valid_max: 99 (Type is Int32) contentType: auxiliaryInformation (Type is String) description: The ending cycle number associated with the data contained within this granule. The cycle number is the counter of the number of 91-day repeat cycles completed by the mission. Type: integer. (Type is String) origname: end_cycle (Type is String) fullnamepath: /ancillary_data/end_cycle (Type is String) ancillary_data_granule_start_utc[ /FakeDim0= 0..0] (Type is String) attributes long_name: Start UTC Time of Granule (CCSDS-A, Requested) (Type is String) units: 1 (Type is String) source: Derived (Type is String) contentType: auxiliaryInformation (Type is String) description: Requested start time (in UTC CCSDS-A) of this granule. Type: character string. (Type is String) origname: granule_start_utc (Type is String) fullnamepath: /ancillary_data/granule_start_utc (Type is String) ancillary_data_start_delta_time[ /FakeDim0= 0..0] (Type is Float64) attributes long_name: ATLAS Start Time (Actual) (Type is String) standard_name: time (Type is String) units: seconds since 2018-01-01 (Type is String) source: Derived (Type is String) contentType: auxiliaryInformation (Type is String) description: Number of GPS seconds since the ATLAS SDP epoch at the first data point in the file. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. Type: double precision. (Type is String) origname: start_delta_time (Type is String) fullnamepath: /ancillary_data/start_delta_time (Type is String) ancillary_data_start_geoseg[ /FakeDim0= 0..0] (Type is Int32) attributes long_name: Starting Geolocation Segment (Type is String) units: 1 (Type is String) source: Derived (Type is String) contentType: auxiliaryInformation (Type is String) description: The starting geolocation segment number associated with the data contained within this granule. ICESat-2 granule geographic regions are further refined by geolocation segments. During the geolocation process, a geolocation segment is created approximately every 20m from the start of the orbit to the end. The geolocation segments help align the ATLAS strong a weak beams and provide a common segment length for the L2 and higher products. The geolocation segment indices differ slightly from orbit-to-orbit because of the irregular shape of the Earth. The geolocation segment indices on ATL01 and ATL02 are only approximate because beams have not been aligned at the time of their creation. Type: integer. (Type is String) origname: start_geoseg (Type is String) fullnamepath: /ancillary_data/start_geoseg (Type is String) ancillary_data_start_orbit[ /FakeDim0= 0..0] (Type is Int32) attributes long_name: Starting Orbit Number (Type is String) units: 1 (Type is String) source: Derived (Type is String) contentType: auxiliaryInformation (Type is String) description: The starting orbit number associated with the data contained within this granule. The orbit number increments each time the spacecraft completes a full orbit of the Earth. Type: integer. (Type is String) origname: start_orbit (Type is String) fullnamepath: /ancillary_data/start_orbit (Type is String) ancillary_data_data_start_utc[ /FakeDim0= 0..0] (Type is String) attributes long_name: Start UTC Time of Granule (CCSDS-A, Actual) (Type is String) units: 1 (Type is String) source: Derived (Type is String) contentType: auxiliaryInformation (Type is String) description: UTC (in CCSDS-A format) of the first data point within the granule. Type: character string. (Type is String) origname: data_start_utc (Type is String) fullnamepath: /ancillary_data/data_start_utc (Type is String) ancillary_data_end_gpsweek[ /FakeDim0= 0..0] (Type is Int32) attributes long_name: Ending GPSWeek of Granule (Actual) (Type is String) units: weeks from 1980-01-06 (Type is String) source: Derived (Type is String) contentType: auxiliaryInformation (Type is String) description: GPS week number of the last data point in the granule. Type: integer. (Type is String) origname: end_gpsweek (Type is String) fullnamepath: /ancillary_data/end_gpsweek (Type is String) ancillary_data_start_rgt[ /FakeDim0= 0..0] (Type is Int32) attributes long_name: Starting Reference Groundtrack (Type is String) units: 1 (Type is String) source: Derived (Type is String) valid_min: 1 (Type is Int32) valid_max: 1387 (Type is Int32) contentType: auxiliaryInformation (Type is String) description: The starting reference ground track (RGT) number associated with the data contained within this granule. There are 1387 reference ground track in the ICESat-2 repeat orbit. The reference ground track increments each time the spacecraft completes a full orbit of the Earth and resets to 1 each time the spacecraft completes a full cycle. Type: integer. (Type is String) origname: start_rgt (Type is String) fullnamepath: /ancillary_data/start_rgt (Type is String) ancillary_data_end_gpssow[ /FakeDim0= 0..0] (Type is Float64) attributes long_name: Ending GPS SOW of Granule (Actual) (Type is String) units: seconds (Type is String) source: Derived (Type is String) contentType: auxiliaryInformation (Type is String) description: GPS seconds-of-week of the last data point in the granule. Type: double precision. (Type is String) origname: end_gpssow (Type is String) fullnamepath: /ancillary_data/end_gpssow (Type is String) ancillary_data_start_region[ /FakeDim0= 0..0] (Type is Int32) attributes long_name: Starting Region (Type is String) units: 1 (Type is String) source: Derived (Type is String) contentType: auxiliaryInformation (Type is String) description: The starting product-specific region number associated with the data contained within this granule. ICESat-2 data products are separated by geographic regions. The data contained within a specific region are the same for ATL01 and ATL02. ATL03 regions differ slightly because of different geolocation segment locations caused by the irregular shape of the Earth. The region indices for other products are completely independent. Type: integer. (Type is String) origname: start_region (Type is String) fullnamepath: /ancillary_data/start_region (Type is String) ancillary_data_start_gpsweek[ /FakeDim0= 0..0] (Type is Int32) attributes long_name: Start GPSWeek of Granule (Actual) (Type is String) units: weeks from 1980-01-06 (Type is String) source: Derived (Type is String) contentType: auxiliaryInformation (Type is String) description: GPS week number of the first data point in the granule. Type: integer. (Type is String) origname: start_gpsweek (Type is String) fullnamepath: /ancillary_data/start_gpsweek (Type is String) spolar_lorate_blowing_snow_freq[ /spolar_grid_lat= 0..29] [ /spolar_grid_lon= 0..119] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) long_name: South Polar Low-Rate Blowing Snow Frequency (percent) (Type is String) units: percent (Type is String) source: L3B ATM ATBD, Section 3.4, Section 5.0, Table 5. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 100.0000000 (Type is Float32) contentType: modelResult (Type is String) description: The south polar low-rate blowing snow frequency two-dimensional atmospheric gridded parameter. For each south polar grid cell this represents the ratio of the number of the valid detected blowing snow layer top height 1 Hz (low-rate profile) observations (bsnow_h () .ne. INVALID and bsnow_h () > 0.0) to the number of valid blowing snow confidence flag (bsnow_con () .ne. INVALID, exceeds the surface not detected value, i.e., bsnow_con () > -3, and is implemented as bsnow_con () => -2) 1 Hz (low-rate profile) observations (spolar_lorate_bsnow_obs_grid (i,j)); the ratio is multiplied by 100.0 to obtain percent. The gridded south polar low-rate blowing snow frequency values are produced when the number of valid blowing snow confidence flag 1 Hz (low-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (spolar_lorate_bsnow_obs_grid (i,j) => obs_minimum); otherwise set to INVALID. The ATL09 required blowing snow height (bsnow_h ()) and blowing snow confidence (bsnow_con ()) values are determined in the L3A ATM low-rate profile processing. Grid array organization: spolar_lorate_blowing_snow_freq (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the weekly gridded array dimension is: spolar_lorate_blowing_snow_freq (120,30), type: floating point. Reference: spolar_lorate_blowing_snow_freq (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "spolar_lorate_blowing_snow_freq_img" in the ATL16 product. The applicable south polar observation counts for this atmosphere gridded parameter are available from: spolar_lorate_bsnow_obs_grid (i,j). Value range: minimum: 0.0, maximum: 100.0. (Type is String) coordinates: spolar_grid_lon spolar_grid_lat (Type is String) origname: spolar_lorate_blowing_snow_freq (Type is String) fullnamepath: /spolar_lorate_blowing_snow_freq (Type is String) spolar_transcloud_frac[ /spolar_grid_lat= 0..29] [ /spolar_grid_lon= 0..119] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) long_name: South Polar Transmissive Cloud Fraction (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.3.2, Section 5.0, Table 5. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: modelResult (Type is String) description: The south polar transmissive cloud fraction two-dimensional atmospheric gridded parameter. For each south polar cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1 within cloud_flag_atm () layers) with surface signal detection (surface_sig () > 0.0) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded south polar transmissive cloud fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The fraction of transmissive clouds covering the entire grid cell. Transmissive clouds are clouds that permit or allow transmission of downward radiation through the cloud. The ATL09 required number of layers (cloud_flag_atm ()) and the layer attribute flag (layer_attr (,)) are determined from the backscatter profile using the DDA layer finder, and the required detected surface signal (surface_sig ()) is determined from the surface signal count of the number of photons in the detected surface bin, all in the L3A ATM high-rate profile processing. Grid array organization: spolar_transcloud_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the weekly gridded array dimension is: spolar_transcloud_frac (120,30), type: floating point. Reference: spolar_transcloud_frac (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "spolar_transcloud_frac_img" in the ATL16 product. The applicable south polar observation counts for this atmosphere gridded parameter are available from: spolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. (Type is String) coordinates: spolar_grid_lon spolar_grid_lat (Type is String) origname: spolar_transcloud_frac (Type is String) fullnamepath: /spolar_transcloud_frac (Type is String) global_cloud_frac[ /global_grid_lat= 0..59] [ /global_grid_lon= 0..119] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) long_name: Global Cloud Fraction (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.1, Section 5.0, Table 5. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: modelResult (Type is String) description: The global cloud fraction two-dimensional atmospheric gridded parameter. For each global grid cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1 within cloud_flag_atm () layers) to the number of all 25 Hz (high-rate profile) observations (global_cloud_aerosol_obs_grid (i,j)) in the cell. The gridded global cloud fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (global_cloud_aerosol_obs_grid (i,j) => obs_minimum); otherwise set to INVALID. The ATL09 required number of layers (cloud_flag_atm ()) and the layer attribute flag (layer_attr (,)) are determined from the backscatter profile using the DDA layer finder in the L3A ATM high-rate profile processing. A cloud fraction value of 0.0 represents a totally cloud free grid cell; a cloud fraction value of 1.0 indicates the grid cell is completely covered with clouds. Grid array organization: global_cloud_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given weekly global_grid_lon_scale = 3.0 degrees and global_grid_lat_scale = 3.0 degrees, gridded array dimension: global_cloud_frac (120,60), type: floating point. Reference: global_cloud_frac (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the global projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "global_cloud_frac_img" in the ATL16 product. The applicable global observation counts for this atmosphere gridded parameter are available from: global_cloud_aerosol_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. (Type is String) coordinates: global_grid_lon global_grid_lat (Type is String) origname: global_cloud_frac (Type is String) fullnamepath: /global_cloud_frac (Type is String) spolar_cloud_obs_grid[ /spolar_grid_lat= 0..29] [ /spolar_grid_lon= 0..119] (Type is Float32) attributes long_name: south polar cloud observation grid (Type is String) units: 1 (Type is String) source: L3B ATM ATBD, Section 3.9, Table 4., Section 5.0, Table 5. (Type is String) contentType: modelResult (Type is String) description: The south polar total cloud fraction observation count two-dimensional gridded parameter. The number of observations used to compute the south polar total cloud fraction. This number represents all 25 Hz (high-rate profile) observations in each cell. Only 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1) in each grid cell are used to compute the cell south polar total cloud fraction (spolar_totlcloud_frac (i,j)). Grid array organization: spolar_cloud_obs_grid (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the weekly gridded array dimension is: spolar_cloud_obs_grid (120,30), type: floating point. Reference: spolar_cloud_obs_grid (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. The south polar observation counts are applicable to these atmosphere gridded parameters: spolar_lowcloud_frac (i,j), spolar_midcloud_frac (i,j), spolar_highcloud_frac (i,j), spolar_totalcloud_frac (i,j), spolar_transcloud_frac (i,j), spolar_opaquecloud_frac (i,j), and spolar_grnd_detect (i,j). (Type is String) coordinates: spolar_grid_lon spolar_grid_lat (Type is String) origname: spolar_cloud_obs_grid (Type is String) fullnamepath: /spolar_cloud_obs_grid (Type is String) spolar_transcloud_frac_img[ /FakeDim4= 0..637] [ /FakeDim5= 0..561] [ /FakeDim3= 0..2] (Type is Byte) attributes CLASS: IMAGE (Type is String) IMAGE_VERSION: 1.2 (Type is String) IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String) INTERLACE_MODE: INTERLACE_PIXEL (Type is String) origname: spolar_transcloud_frac_img (Type is String) fullnamepath: /spolar_transcloud_frac_img (Type is String) spolar_opaquecloud_frac[ /spolar_grid_lat= 0..29] [ /spolar_grid_lon= 0..119] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) long_name: South Polar Opaque Cloud Fraction (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.3.2, Section 5.0, Table 5. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: modelResult (Type is String) description: The south polar opaque cloud fraction two-dimensional atmospheric gridded parameter. For each south polar cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr () = 1 within cloud_flag_atm () layers) without surface signal detection (surface_sig () = 0.0) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded south polar opaque cloud fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The fraction of opaque clouds covering the entire grid cell. Opaque clouds are clouds that inhibit or absorb transmission of downward radiation through the cloud. The cloud layer with opaque characteristics exhibits no surface signal count return (=0.0), indicating that no transmitted photons reached the surface. The ATL09 required number of layers (cloud_flag_atm ()) and the layer attribute flag (layer_attr (,)) are determined from the backscatter profile using the DDA layer finder, and the required surface signal (surface_sig ()) is determined from the surface signal count of the number of photons in the detected surface bin, all in the L3A ATM high-rate profile processing. Grid array organization: spolar_opaquecloud_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the weekly gridded array dimension is: spolar_opaquecloud_frac (120,30), type: floating point. Reference: spolar_opaquecloud_frac (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "spolar_opaquecloud_frac_img" in the ATL16 product. The applicable south polar observation counts for this atmosphere gridded parameter are available from: spolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. (Type is String) coordinates: spolar_grid_lon spolar_grid_lat (Type is String) origname: spolar_opaquecloud_frac (Type is String) fullnamepath: /spolar_opaquecloud_frac (Type is String) global_aerosol_frac_img[ /FakeDim1= 0..723] [ /FakeDim2= 0..1026] [ /FakeDim3= 0..2] (Type is Byte) attributes CLASS: IMAGE (Type is String) IMAGE_VERSION: 1.2 (Type is String) IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String) INTERLACE_MODE: INTERLACE_PIXEL (Type is String) origname: global_aerosol_frac_img (Type is String) fullnamepath: /global_aerosol_frac_img (Type is String) npolar_lowcloud_frac_img[ /FakeDim4= 0..637] [ /FakeDim5= 0..561] [ /FakeDim3= 0..2] (Type is Byte) attributes CLASS: IMAGE (Type is String) IMAGE_VERSION: 1.2 (Type is String) IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String) INTERLACE_MODE: INTERLACE_PIXEL (Type is String) origname: npolar_lowcloud_frac_img (Type is String) fullnamepath: /npolar_lowcloud_frac_img (Type is String) npolar_totalcloud_frac[ /npolar_grid_lat= 0..29] [ /npolar_grid_lon= 0..119] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) long_name: North Polar Total Cloud Fraction (Type is String) units: fraction (Type is String) source: L3B ATM ATBD, Section 3.3.1, Section 5.0, Table 5. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 1.000000000 (Type is Float32) contentType: modelResult (Type is String) description: The north polar total cloud fraction two-dimensional atmospheric gridded parameter. For each north polar grid cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1 within cloud_flag_atm () layers) to the number of all 25 Hz (high-rate profile) observations (npolar_cloud_obs_grid (i,j)) in the cell. The gridded north polar total cloud fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (npolar_cloud_obs_grid (i,j) => obs_minimum); otherwise set to INVALID. The ATL09 required number of layers (cloud_flag_atm ()) and the layer attribute flag (layer_attr (,)) are determined from the backscatter profile using the DDA layer finder in the L3A ATM high-rate profile processing. Grid array organization: npolar_totalcloud_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the weekly gridded array dimension is: npolar_totalcloud_frac (120,30), type: floating point. Reference: npolar_totalcloud_frac (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "npolar_totalcloud_frac_img" in the ATL16 product. The applicable north polar observation counts for this atmosphere gridded parameter are available from: npolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. (Type is String) coordinates: npolar_grid_lon npolar_grid_lat (Type is String) origname: npolar_totalcloud_frac (Type is String) fullnamepath: /npolar_totalcloud_frac (Type is String) npolar_opaquecloud_frac_img[ /FakeDim4= 0..637] [ /FakeDim5= 0..561] [ /FakeDim3= 0..2] (Type is Byte) attributes CLASS: IMAGE (Type is String) IMAGE_VERSION: 1.2 (Type is String) IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String) INTERLACE_MODE: INTERLACE_PIXEL (Type is String) origname: npolar_opaquecloud_frac_img (Type is String) fullnamepath: /npolar_opaquecloud_frac_img (Type is String) spolar_midcloud_frac_img[ /FakeDim4= 0..637] [ /FakeDim5= 0..561] [ /FakeDim3= 0..2] (Type is Byte) attributes CLASS: IMAGE (Type is String) IMAGE_VERSION: 1.2 (Type is String) IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String) INTERLACE_MODE: INTERLACE_PIXEL (Type is String) origname: spolar_midcloud_frac_img (Type is String) fullnamepath: /spolar_midcloud_frac_img (Type is String) global_cloud_frac_img[ /FakeDim1= 0..723] [ /FakeDim2= 0..1026] [ /FakeDim3= 0..2] (Type is Byte) attributes CLASS: IMAGE (Type is String) IMAGE_VERSION: 1.2 (Type is String) IMAGE_SUBCLASS: IMAGE_TRUECOLOR (Type is String) INTERLACE_MODE: INTERLACE_PIXEL (Type is String) origname: global_cloud_frac_img (Type is String) fullnamepath: /global_cloud_frac_img (Type is String) spolar_hirate_bsnow_obs_grid[ /spolar_grid_lat= 0..29] [ /spolar_grid_lon= 0..119] (Type is Float32) attributes long_name: south polar high-rate blowing snow frequency observation grid (Type is String) units: 1 (Type is String) source: L3B ATM ATBD, Section 3.9, Table 4., Section 5.0, Table 5. (Type is String) contentType: modelResult (Type is String) description: The south polar high-rate blowing snow observation count two-dimensional gridded parameter. The number of high-rate profile blowing snow observations used in the computation of high-rate blowing snow frequency for the Antarctic. For each south polar grid cell this represents the number of valid blowing snow confidence 25 Hz (high-rate profile) observations (bsnow_con () .ne. INVALID), where the high-rate profile blowing snow confidence value exceeds the surface not detected value (bsnow_con () > -3, and is actually implemented as bsnow_con () => -2). Only valid detected blowing snow layer top height 25 Hz (high-rate profile) observations (bsnow_h () .ne. INVALID and bsnow_h () > 0.0) and only valid blowing snow confidence 25 Hz (high-rate profile) observations (bsnow_con () .ne. INVALID), where the high-rate blowing snow confidence value exceeds the surface not detected value (bsnow_con () > -3, and is implemented as bsnow_con () => -2) in each grid cell are used to compute the cell south polar high-rate blowing snow frequency (spolar_hirate_blowing_snow_freq (i,j)). Grid array organization: spolar_hirate_bsnow_obs_grid (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the weekly gridded array dimension is: spolar_hirate_bsnow_obs_grid (120,30), type: floating point. Reference: spolar_hirate_bsnow_obs_grid (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. The south polar observation counts are applicable to the atmosphere gridded parameter: spolar_hirate_blowing_snow_freq (i,j). (Type is String) coordinates: spolar_grid_lon spolar_grid_lat (Type is String) origname: spolar_hirate_bsnow_obs_grid (Type is String) fullnamepath: /spolar_hirate_bsnow_obs_grid (Type is String) npolar_hirate_blowing_snow_freq[ /npolar_grid_lat= 0..29] [ /npolar_grid_lon= 0..119] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) long_name: North Polar High-Rate Blowing Snow Frequency (percent) (Type is String) units: percent (Type is String) source: L3B ATM ATBD, Section 3.4, Section 5.0, Table 5. (Type is String) valid_min: 0.000000000 (Type is Float32) valid_max: 100.0000000 (Type is Float32) contentType: modelResult (Type is String) description: The north polar high-rate blowing snow frequency two-dimensional atmospheric gridded parameter. For each north polar grid cell this represents the ratio of the number of the valid detected blowing snow layer top height 25 Hz (high-rate profile) observations (bsnow_h () .ne. INVALID and bsnow_h () > 0.0) to the number of valid blowing snow confidence flag (bsnow_con () .ne. INVALID, exceeds the surface not detected value, i.e., bsnow_con () > -3, and is implemented as bsnow_con () => -2) 25 Hz (high-rate profile) observations (npolar_hirate_bsnow_obs_grid (i,j)); the ratio is multiplied by 100.0 to obtain percent. The gridded north polar high-rate blowing snow frequency values are produced when the number of valid blowing snow confidence flag 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (npolar_hirate_bsnow_obs_grid (i,j) => obs_minimum); otherwise set to INVALID. The ATL09 required blowing snow height (bsnow_h ()) and blowing snow confidence (bsnow_con ()) values are determined in the L3A ATM high-rate profile processing. Grid array organization: npolar_hirate_blowing_snow_freq (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the weekly polar_grid_lon_scale = 3.0 degrees and the polar_grid_lat_scale = 1.0 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the weekly gridded array dimension is: npolar_hirate_blowing_snow_freq (120,30), type: floating point. Reference: npolar_hirate_blowing_snow_freq (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "npolar_hirate_blowing_snow_freq_img" in the ATL16 product. The applicable north polar observation counts for this atmosphere gridded parameter are available from: npolar_hirate_bsnow_obs_grid (i,j). Value range: minimum: 0.0, maximum: 100.0. (Type is String) coordinates: npolar_grid_lon npolar_grid_lat (Type is String) origname: npolar_hirate_blowing_snow_freq (Type is String) fullnamepath: /npolar_hirate_blowing_snow_freq (Type is String)

dataset: ATL16_20210101010136_01231001_003_01.h5
dmr

OPeNDAP Hyrax (1.17.0)
Documentation Questions? Contact Support

dataset: ATL16_20210101010136_01231001_003_01.h5 dmr

OPeNDAP Hyrax (1.17.0) Documentation Questions? Contact Support

dataset: ATL16_20210101010136_01231001_003_01.h5
dmr

OPeNDAP Hyrax (1.17.0)
Documentation Questions? Contact Support