gt1l_delta_time[ /gt1l_delta_time= 0..20075] (Type is Float64)

attributes
- units: seconds since 2018-01-01 (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Delta Time (Type is String)
- standard_name: time (Type is String)
- description: Number of GPS seconds since the ATLAS SDP epoch. 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 is String)
- source: ATL03 (Type is String)
- coordinates: segment_lat segment_lon (Type is String)
- origname: delta_time (Type is String)
- fullnamepath: /gt1l/delta_time (Type is String)

gt1r_delta_time[ /gt1r_delta_time= 0..4702] (Type is Float64)

attributes
- units: seconds since 2018-01-01 (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Delta Time (Type is String)
- standard_name: time (Type is String)
- description: Number of GPS seconds since the ATLAS SDP epoch. 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 is String)
- source: ATL03 (Type is String)
- coordinates: segment_lat segment_lon (Type is String)
- origname: delta_time (Type is String)
- fullnamepath: /gt1r/delta_time (Type is String)

gt2l_delta_time[ /gt2l_delta_time= 0..16301] (Type is Float64)

attributes
- units: seconds since 2018-01-01 (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Delta Time (Type is String)
- standard_name: time (Type is String)
- description: Number of GPS seconds since the ATLAS SDP epoch. 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 is String)
- source: ATL03 (Type is String)
- coordinates: segment_lat segment_lon (Type is String)
- origname: delta_time (Type is String)
- fullnamepath: /gt2l/delta_time (Type is String)

gt2r_delta_time[ /gt2r_delta_time= 0..5099] (Type is Float64)

attributes
- units: seconds since 2018-01-01 (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Delta Time (Type is String)
- standard_name: time (Type is String)
- description: Number of GPS seconds since the ATLAS SDP epoch. 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 is String)
- source: ATL03 (Type is String)
- coordinates: segment_lat segment_lon (Type is String)
- origname: delta_time (Type is String)
- fullnamepath: /gt2r/delta_time (Type is String)

gt3l_delta_time[ /gt3l_delta_time= 0..20712] (Type is Float64)

attributes
- units: seconds since 2018-01-01 (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Delta Time (Type is String)
- standard_name: time (Type is String)
- description: Number of GPS seconds since the ATLAS SDP epoch. 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 is String)
- source: ATL03 (Type is String)
- coordinates: segment_lat segment_lon (Type is String)
- origname: delta_time (Type is String)
- fullnamepath: /gt3l/delta_time (Type is String)

gt3r_delta_time[ /gt3r_delta_time= 0..5058] (Type is Float64)

attributes
- units: seconds since 2018-01-01 (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Delta Time (Type is String)
- standard_name: time (Type is String)
- description: Number of GPS seconds since the ATLAS SDP epoch. 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 is String)
- source: ATL03 (Type is String)
- coordinates: segment_lat segment_lon (Type is String)
- origname: delta_time (Type is String)
- fullnamepath: /gt3r/delta_time (Type is String)

orbit_info_crossing_time[ /orbit_info_crossing_time= 0..3] (Type is Float64)

attributes
- units: seconds since 2018-01-01 (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: Ascending Node Crossing Time (Type is String)
- standard_name: time (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 is String)
- source: POD/PPD (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
- units: seconds since 2018-01-01 (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: Time of Last Spacecraft Orientation Change (Type is String)
- standard_name: time (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 is String)
- source: POD/PPD (Type is String)
- origname: sc_orient_time (Type is String)
- fullnamepath: /orbit_info/sc_orient_time (Type is String)

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

attributes
- units: level (Type is String)

FakeDim1[ /FakeDim1= 0..8] (Type is Int32)

attributes
- units: level (Type is String)

FakeDim3[ /FakeDim3= 0..8] (Type is Int32)

attributes
- units: level (Type is String)

FakeDim4[ /FakeDim4= 0..1] (Type is Int32)

attributes
- units: level (Type is String)

FakeDim5[ /FakeDim5= 0..3] (Type is Int32)

attributes
- units: level (Type is String)

orbit_info_cycle_number[ /orbit_info_crossing_time= 0..3] (Type is Int8)

attributes
- units: 1 (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: Cycle Number (Type is String)
- description: A count of the number of exact repeats of this reference orbit. (Type is String)
- source: Operations (Type is String)
- valid_min: 0 (Type is Int8)
- valid_max: 50 (Type is Int8)
- 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..3] (Type is UInt16)

attributes
- units: 1 (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: Orbit Number (Type is String)
- description: Unique identifying number for each planned ICESat-2 orbit. (Type is String)
- source: Operations (Type is String)
- valid_min: 1 (Type is UInt16)
- valid_max: 65000 (Type is UInt16)
- 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..3] (Type is Float64)

attributes
- units: degrees_east (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: Ascending Node Longitude (Type is String)
- description: Longitude at the ascending node crossing. (Type is String)
- source: POD/PPD (Type is String)
- valid_min: -180.00000000000000 (Type is Float64)
- valid_max: 180.00000000000000 (Type is Float64)
- 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
- units: 1 (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: Spacecraft Orientation (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 is String)
- source: POD/PPD (Type is String)
- flag_meanings: backward forward transition (Type is String)
- flag_values: 0, 1, 2 (Type is Int8)
- valid_min: 0 (Type is Int8)
- valid_max: 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..3] (Type is Int16)

attributes
- units: 1 (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: Reference Ground track (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 is String)
- source: POD/PPD (Type is String)
- valid_min: 1 (Type is Int16)
- valid_max: 1387 (Type is Int16)
- origname: rgt (Type is String)
- fullnamepath: /orbit_info/rgt (Type is String)
- coordinates: orbit_info_crossing_time (Type is String)

gt1r_rgt[ /gt1r_delta_time= 0..4702] (Type is Int16)

attributes
- units: 1 (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: Reference Ground track (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 is String)
- source: ATL03 (Type is String)
- valid_min: 1 (Type is Int16)
- valid_max: 1387 (Type is Int16)
- origname: rgt (Type is String)
- fullnamepath: /gt1r/rgt (Type is String)
- coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String)

gt1r_qf_bias_fit[ /gt1r_delta_time= 0..4702] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Height Bias Fit Quality Flag (Type is String)
- description: The height bias fit flag is set based on the value of the goodness of fit bias estimated as the difference between the centroid elevations of the observed surface water histogram and fitted integrated water surface model histogram. The flag values are set as follows: = -3 if H_bias_fit < -0.10 (m); -2 if -0.10 <= H_bias_fit < -0.05;-1 when -0.05 <= H_bias_fit < -0.01; 0 if -0.01 <= H_bias_fit < 0.01 (m); 1 if 0.01 <= H_bias_fit < 0.05; 2 if 0.05 < H_bias_fit < 0.10; 3 if 0.10 <= H_bias_fit; 4 if H_bias_fit is invalid. (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 equal_to_or_above_threshold6 invalid (Type is String)
- flag_values: -3, -2, -1, 0, 1, 2, 3, 4 (Type is Int32)
- valid_min: -3 (Type is Int32)
- valid_max: 4 (Type is Int32)
- origname: qf_bias_fit (Type is String)
- fullnamepath: /gt1r/qf_bias_fit (Type is String)
- coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String)

gt1r_sseg_mean_lon[ /gt1r_delta_time= 0..4702] (Type is Float64)

attributes
- units: degrees_east (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Short Segment Mean Longitude (Type is String)
- description: Mean longitude of the signal-qualified photons in a short segment. (Type is String)
- source: Inland Water ATBD (Type is String)
- valid_min: -180.00000000000000 (Type is Float64)
- valid_max: 180.00000000000000 (Type is Float64)
- origname: sseg_mean_lon (Type is String)
- fullnamepath: /gt1r/sseg_mean_lon (Type is String)
- coordinates: gt1r_delta_time (Type is String)

gt1r_qf_ice[ /gt1r_delta_time= 0..4702] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Ice Quality Flag (Type is String)
- description: The quality flag for ice describes the likelihood of ice on the short water body surface segment. 0 for QF_Bckgrd<= 2; 1 for 2 < QF_Bckgrd<= 4; 2 for 4 < QF_Bckgrd; 3 for (4 < QF_Bckgrd and QF_Cloud=1) (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: qf_bckgrd_le_2 qf_bckgrd_le_4 qf_bckgrd_gt_4 qf_bckgrd_w_cloud (Type is String)
- flag_values: 0, 1, 2, 3 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 3 (Type is Int32)
- origname: qf_ice (Type is String)
- fullnamepath: /gt1r/qf_ice (Type is String)
- coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String)

gt1r_inland_water_body_type[ /gt1r_delta_time= 0..4702] (Type is Int8)

attributes
- _FillValue: 127 (Type is Int8)
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Body Type (Type is String)
- description: Type of Inland Water Body, where 1=Lake, 2=Known Reservoir, 3=(Reserved for future use), 4=Ephemeral Water, 5=River, 6=Estuary or Bay, 7=Coastal Water, 8=Reserved, 9=Reserved (Type is String)
- source: ATL13 ATBD, Section 5.3.1 (C) (Type is String)
- flag_meanings: Lake Known_Reservoir Reserved_for_future_use Ephemeral_Water River Estuary_or_Bay Coastal_Water Reserved Reserved (Type is String)
- flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 (Type is Int8)
- valid_min: 1 (Type is Int8)
- valid_max: 9 (Type is Int8)
- origname: inland_water_body_type (Type is String)
- fullnamepath: /gt1r/inland_water_body_type (Type is String)
- coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String)

gt1r_inland_water_body_id[ /gt1r_delta_time= 0..4702] (Type is Int32)

attributes
- contentType: referenceInformation (Type is String)
- long_name: Body ID (Type is String)
- description: Identifying signature of an individual inland water body. Each body of water is represented by a unique numeric value. (Type is String)
- source: ATL13 ATBD, Section 5.3.1 (C) (Type is String)
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- origname: inland_water_body_id (Type is String)
- fullnamepath: /gt1r/inland_water_body_id (Type is String)
- coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String)

gt1r_segment_geoid[ /gt1r_delta_time= 0..4702] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: meters (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Segment Geoid (Type is String)
- description: Applicable geoid value at reporting location for all short segment statistics. (Type is String)
- source: ATL03 (Type is String)
- origname: segment_geoid (Type is String)
- fullnamepath: /gt1r/segment_geoid (Type is String)
- coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String)

gt1r_qf_sseg_length[ /gt1r_delta_time= 0..4702] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Short Segment Length flag (Type is String)
- description: The Short Segment Length flag is set based on the length of the short segment. The flag is set as follows: 0 if sseg_length< 50 (meters); 1 if 50 <sseg_length < 150 (meters); 2 if 150 < sseg_length< 300 (meters); 3 if 300 < sseg_length. (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: below_threshold1 below_threshold2 below_threshold3 above_threshold4 (Type is String)
- flag_values: 0, 1, 2, 3 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 3 (Type is Int32)
- origname: qf_sseg_length (Type is String)
- fullnamepath: /gt1r/qf_sseg_length (Type is String)
- coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String)

gt1r_qf_lseg_length[ /gt1r_delta_time= 0..4702] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Long Segment Length flag (Type is String)
- description: The Long Segment Length flag is set based on the length of the long segment. The flag is set as follows: 0 if Lseg_length < 500 (meters); 1 if 50 <= Lseg_length < 1500 (meters); 2 if 150 <= Lseg_length < 3000 (meters); 3 if 3000 <= Lseg_length (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: below_threshold1 below_threshold2 below_threshold3 above_threshold4 (Type is String)
- flag_values: 0, 1, 2, 3 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 3 (Type is Int32)
- origname: qf_lseg_length (Type is String)
- fullnamepath: /gt1r/qf_lseg_length (Type is String)
- coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String)

gt1r_significant_wave_ht[ /gt1r_delta_time= 0..4702] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: meters (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: SWH (Type is String)
- description: Significant wave height (Type is String)
- source: section 5.3.3 (C) (Type is String)
- origname: significant_wave_ht (Type is String)
- fullnamepath: /gt1r/significant_wave_ht (Type is String)
- coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String)

gt1r_qf_bias_em[ /gt1r_delta_time= 0..4702] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: EM Bias Quality Flag (Type is String)
- description: The Electromagnetic Bias flag is set based on threshold checks for the estimated electromagnetic height bias. The flag is set as follows: -3 if H_bias_EM < -0.10 (m); -2 if -0.10 < H_bias_EM < -0.05; -1 if -0.05 <= H_bias_EM < -0.01; 0 if -0.01 <= H_bias_EM < 0.01 (m); 1 if 0.01 <= H_bias_EM < 0.05; 2 if 0.05 <= H_bias_EM < 0.10; 3 if 0.10 < H_bias_EM; 4 if H_bias_EM is invalid. (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 above_threshold6 invalid (Type is String)
- flag_values: -3, -2, -1, 0, 1, 2, 3, 4 (Type is Int32)
- valid_min: -3 (Type is Int32)
- valid_max: 4 (Type is Int32)
- origname: qf_bias_em (Type is String)
- fullnamepath: /gt1r/qf_bias_em (Type is String)
- coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String)

gt1r_segment_id_end[ /gt1r_delta_time= 0..4702] (Type is Int32)

attributes
- units: 1 (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: Last ATL03 Segment ID (Type is String)
- description: Last ATL03 segment_id associated with the photons within this inland water segment. (Type is String)
- source: ATL03 (Type is String)
- origname: segment_id_end (Type is String)
- fullnamepath: /gt1r/segment_id_end (Type is String)
- coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String)

gt1r_stdev_water_surf[ /gt1r_delta_time= 0..4702] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: meters (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: Surface StDev (Type is String)
- description: Standard deviation of water surface, calculated over long segments with result reported at each short segment location tag contained within. (Type is String)
- source: section 5.3.3 (C) (Type is String)
- origname: stdev_water_surf (Type is String)
- fullnamepath: /gt1r/stdev_water_surf (Type is String)
- coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String)

gt1r_qf_iwp[ /gt1r_delta_time= 0..4702] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- contentType: qualityInformation (Type is String)
- long_name: Inland Water Segment Processing Flag (Type is String)
- description: Inland Water segment Processing (IWP) flag to describe the level of processing the inland water algorithm was able to perform on each short segment based on the data available, ranging from 1 to 7. (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: 1_short_segment 2_short_segments 3_to_5_short_segments 6_to_7_short_segments 8_to_9_short_segments 10_to_29_short_segments 30_or_more_short_segments_analyzed (Type is String)
- flag_values: 1, 2, 3, 4, 5, 6, 7 (Type is Int32)
- valid_min: 1 (Type is Int32)
- valid_max: 7 (Type is Int32)
- origname: qf_iwp (Type is String)
- fullnamepath: /gt1r/qf_iwp (Type is String)
- coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String)

gt1r_segment_id_beg[ /gt1r_delta_time= 0..4702] (Type is Int32)

attributes
- units: 1 (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: First ATL03 Segment ID (Type is String)
- description: First ATL03 segment_id associated with the photons within this inland water segment. (Type is String)
- source: ATL03 (Type is String)
- origname: segment_id_beg (Type is String)
- fullnamepath: /gt1r/segment_id_beg (Type is String)
- coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String)

gt1r_cycle[ /gt1r_delta_time= 0..4702] (Type is Int8)

attributes
- units: counts (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: Cycle Number (Type is String)
- description: Tracks the number of 91-day cycles in the mission, beginning with 01. (Type is String)
- source: ATL03 (Type is String)
- valid_min: 0 (Type is Int8)
- valid_max: 50 (Type is Int8)
- origname: cycle (Type is String)
- fullnamepath: /gt1r/cycle (Type is String)
- coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String)

gt1r_qf_subsurf_anomaly[ /gt1r_delta_time= 0..4702] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Subsurface Anomaly Quality Flag (Type is String)
- description: The subsurface anomaly flag is defined as in atbd section 4.5.5.5 above. It is computed for each bin between 6 Stdev below the mean of the integrated model to 20m depth. The anomaly is set to 0 when bin value +<+3* subsurface mean plus s~sub~subsurface and set to 1 when subsurface bin value is other (meaning an anomaly exists) (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: unlikely_subsurface likely_subsurface (Type is String)
- flag_values: 0, 1 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 1 (Type is Int32)
- origname: qf_subsurf_anomaly (Type is String)
- fullnamepath: /gt1r/qf_subsurf_anomaly (Type is String)
- coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String)

gt1r_subsurface_attenuation[ /gt1r_delta_time= 0..4702] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: 1 (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Subsurface Attenuation (Type is String)
- description: Subsurface attenuation coefficient. (Type is String)
- source: section 5.3.4 (A) (Type is String)
- origname: subsurface_attenuation (Type is String)
- fullnamepath: /gt1r/subsurface_attenuation (Type is String)
- coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String)

gt1r_inland_water_body_region[ /gt1r_delta_time= 0..4702] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: Body Region (Type is String)
- description: ATL13-created shapefile representing relevant bodies of water over which to implement the ATL13 water surface finding algorithm only within a region of processing interest. (Type is String)
- source: section 5.3.1 (A) (Type is String)
- origname: inland_water_body_region (Type is String)
- fullnamepath: /gt1r/inland_water_body_region (Type is String)
- coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String)

gt1r_ice_flag[ /gt1r_delta_time= 0..4702] (Type is Int8)

attributes
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Ice Flag (Type is String)
- description: Flag indicating significant existence of ice on the water surface (Type is String)
- source: section 5.3.2 (D) (Type is String)
- flag_meanings: no_ice ice (Type is String)
- flag_values: 0, 1 (Type is Int8)
- valid_min: 0 (Type is Int8)
- valid_max: 1 (Type is Int8)
- origname: ice_flag (Type is String)
- fullnamepath: /gt1r/ice_flag (Type is String)
- coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String)

gt1r_segment_lon[ /gt1r_delta_time= 0..4702] (Type is Float64)

attributes
- units: degrees_east (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Longitude (Type is String)
- standard_name: longitude (Type is String)
- description: Longitude of reporting location (Type is String)
- source: section 5.3.5 (A) (Type is String)
- valid_min: -180.00000000000000 (Type is Float64)
- valid_max: 180.00000000000000 (Type is Float64)
- origname: segment_lon (Type is String)
- fullnamepath: /gt1r/segment_lon (Type is String)
- coordinates: gt1r_delta_time gt1r_segment_lat (Type is String)

gt1r_ht_ortho[ /gt1r_delta_time= 0..4702] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: meters (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Orthometric Height (Type is String)
- description: Orthometric height converted from ellipsoidal height. (Type is String)
- source: section 5.3.5 (A) (Type is String)
- origname: ht_ortho (Type is String)
- fullnamepath: /gt1r/ht_ortho (Type is String)
- coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String)

gt1r_segment_lat[ /gt1r_delta_time= 0..4702] (Type is Float64)

attributes
- units: degrees_north (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Latitude (Type is String)
- standard_name: latitude (Type is String)
- description: Latitude of reporting location (Type is String)
- source: section 5.3.5 (A) (Type is String)
- valid_min: -90.000000000000000 (Type is Float64)
- valid_max: 90.000000000000000 (Type is Float64)
- origname: segment_lat (Type is String)
- fullnamepath: /gt1r/segment_lat (Type is String)
- coordinates: gt1r_delta_time gt1r_segment_lon (Type is String)

gt1r_ht_water_surf[ /gt1r_delta_time= 0..4702] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: meters (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Water Surface Height (Type is String)
- description: Water surface height with reference to WGS84 ellipsoid (Type is String)
- source: section 5.3.5 (A) (Type is String)
- origname: ht_water_surf (Type is String)
- fullnamepath: /gt1r/ht_water_surf (Type is String)
- coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String)

gt1r_err_ht_water_surf[ /gt1r_delta_time= 0..4702] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Height Error (Type is String)
- description: Error included in heights reported in ht_water_surf. (Type is String)
- source: section 5.3.3 (C) (Type is String)
- origname: err_ht_water_surf (Type is String)
- fullnamepath: /gt1r/err_ht_water_surf (Type is String)
- coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String)

gt1r_atl13refid[ /gt1r_delta_time= 0..4702] (Type is Int64)

attributes
- _FillValue: 0 (Type is Int64)
- units: 1 (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: ATL13 Reference ID (Type is String)
- description: Unique aggregate reference number for each shape in the ATL13 Inland Water Body Mask, where digit 1 = type, digit 2 = size, digit 3 = source, and digits 4-10 = shape id (Type is String)
- source: ATL13 ATBD, Section 5.3.1 (C) (Type is String)
- origname: atl13refid (Type is String)
- fullnamepath: /gt1r/atl13refid (Type is String)
- coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String)

gt1r_qf_cloud[ /gt1r_delta_time= 0..4702] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Consolidated cloud flag (Type is String)
- description: This flag is a combination of multiple flags (cloud_flag_atm, cloud_flag_asr, and bsnow_con) and takes daytime/nighttime into consideration. A value of 1 means clouds or blowing snow are likely present. A value of 0 indicates the likely absence of clouds or blowing snow. From the ATL09 data closest to the segment time. (Type is String)
- source: ATL09 (Type is String)
- flag_meanings: likely_clear likely_cloudy (Type is String)
- flag_values: 0, 1 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 1 (Type is Int32)
- origname: qf_cloud (Type is String)
- fullnamepath: /gt1r/qf_cloud (Type is String)
- coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String)

gt1r_inland_water_body_source[ /gt1r_delta_time= 0..4702] (Type is Int8)

attributes
- _FillValue: 127 (Type is Int8)
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Body Source (Type is String)
- description: Source of Inland Water Body shape, where 1=HydroLAKES, 2=Global Lakes and Wetlands Database, 3=Named Marine Water Bodies, 4=GSHHG Shoreline, 5=Reserved, 6=Reserved, 7=Reserved, 8=Reserved, 9=Reserved (Type is String)
- source: ATL13 ATBD, Section 5.3.1 (C) (Type is String)
- flag_meanings: HydroLAKES Global_Lakes_and_Wetlands_Database Named_Marine_Water_Bodies GSHHG_Shoreline Reserved Reserved Reserved Reserved Reserved (Type is String)
- flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 (Type is Int8)
- valid_min: 1 (Type is Int8)
- valid_max: 9 (Type is Int8)
- origname: inland_water_body_source (Type is String)
- fullnamepath: /gt1r/inland_water_body_source (Type is String)
- coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String)

gt1r_inland_water_body_size[ /gt1r_delta_time= 0..4702] (Type is Int8)

attributes
- _FillValue: 127 (Type is Int8)
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Body Size (Type is String)
- description: Size of Inland Water Body, A=area, where 1=A>10,000 km2, 2=10,000>A>=1,000, 3=1,000>A>=100, 4=100>A>=10, 5=10>A>=1, 6=1>A>=0.1, 7=0.01>A, 8=Reserved, 9=Reserved (Type is String)
- source: ATL13 ATBD, Section 5.3.1 (C) (Type is String)
- flag_meanings: A>10000 10000>A>=1000 1000>A>=100 100>A>=10 10>A>=1 1>A>=0.1 0.01>A Reserved Reserved (Type is String)
- flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 (Type is Int8)
- valid_min: 1 (Type is Int8)
- valid_max: 9 (Type is Int8)
- origname: inland_water_body_size (Type is String)
- fullnamepath: /gt1r/inland_water_body_size (Type is String)
- coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String)

gt1r_err_slope_trk[ /gt1r_delta_time= 0..4702] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Slope Error (Type is String)
- description: Error included in segment_slope_trk_local. (Type is String)
- source: section 5.3.3 (C) (Type is String)
- origname: err_slope_trk (Type is String)
- fullnamepath: /gt1r/err_slope_trk (Type is String)
- coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String)

gt1r_segment_slope_trk_bdy[ /gt1r_delta_time= 0..4702] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: 1 (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Water Body Slope (Type is String)
- description: Along track water body surface slope. (Type is String)
- source: section 5.3.5 (A) (Type is String)
- origname: segment_slope_trk_bdy (Type is String)
- fullnamepath: /gt1r/segment_slope_trk_bdy (Type is String)
- coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String)

gt1r_sseg_mean_lat[ /gt1r_delta_time= 0..4702] (Type is Float64)

attributes
- _FillValue: 1.7976931348623157e+308 (Type is Float64)
- units: degrees_north (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Short Segment Mean Latitude (Type is String)
- description: Mean latitude of the signal-qualified photons in a short segment. (Type is String)
- source: Inland Water ATBD (Type is String)
- valid_min: -90.000000000000000 (Type is Float64)
- valid_max: 90.000000000000000 (Type is Float64)
- origname: sseg_mean_lat (Type is String)
- fullnamepath: /gt1r/sseg_mean_lat (Type is String)
- coordinates: gt1r_delta_time (Type is String)

gt1r_qf_spec_width[ /gt1r_delta_time= 0..4702] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Spectral Width Flag (Type is String)
- description: The Spectral Width flag is set based on threshold checks for the estimated Spectral Width. The flag is set as follows: 0 if spec_width < 0.5; 1 if spec_width >= +0.5. (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: below_0.5 above_0.5 (Type is String)
- flag_values: 0, 1 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 1 (Type is Int32)
- origname: qf_spec_width (Type is String)
- fullnamepath: /gt1r/qf_spec_width (Type is String)
- coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String)

gt1r_qf_bckgrd[ /gt1r_delta_time= 0..4702] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Background Quality Flag (Type is String)
- description: Describes the degree of background photons present in each short segment. bckgrd_dnsty_threshold1= 0.001 (counts per bi per Lseg); bckgrd_dnsty_threshold2= 0.01 (counts per bin per Lseg); bckgrd_dnsty_threshold3= 0.05 (counts per bin per Lseg); bckgrd_dnsty_threshold4= 0.1 (counts per bin per Lseg); bckgrd_dnsty_threshold5= 0.3 (counts per bin per Lseg); bckgrd_dnsty_threshold6= 0.5 (counts per bin per Lseg) (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: equal_to_or_below_threshold1 equal_to_or_below_threshold2 equal_to_or_below_threshold3 equal_to_or_below_threshold4 equal_to_or_below_threshold5 equal_to_or_below_threshold6 above_threshold6 (Type is String)
- flag_values: 0, 1, 2, 3, 4, 5, 6 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 6 (Type is Int32)
- origname: qf_bckgrd (Type is String)
- fullnamepath: /gt1r/qf_bckgrd (Type is String)
- coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String)

gt1r_sseg_mean_time[ /gt1r_delta_time= 0..4702] (Type is Float64)

attributes
- contentType: auxiliaryInformation (Type is String)
- long_name: Short Segment Mean Time (Type is String)
- description: Mean time of the signal-qualified photons in a short segment. (Type is String)
- source: Inland Water ATBD (Type is String)
- _FillValue: 1.7976931348623157e+308 (Type is Float64)
- units: Seconds since 2018-01-01 (Type is String)
- origname: sseg_mean_time (Type is String)
- fullnamepath: /gt1r/sseg_mean_time (Type is String)
- coordinates: gt1r_delta_time (Type is String)

gt2r_rgt[ /gt2r_delta_time= 0..5099] (Type is Int16)

attributes
- units: 1 (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: Reference Ground track (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 is String)
- source: ATL03 (Type is String)
- valid_min: 1 (Type is Int16)
- valid_max: 1387 (Type is Int16)
- origname: rgt (Type is String)
- fullnamepath: /gt2r/rgt (Type is String)
- coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String)

gt2r_qf_bias_fit[ /gt2r_delta_time= 0..5099] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Height Bias Fit Quality Flag (Type is String)
- description: The height bias fit flag is set based on the value of the goodness of fit bias estimated as the difference between the centroid elevations of the observed surface water histogram and fitted integrated water surface model histogram. The flag values are set as follows: = -3 if H_bias_fit < -0.10 (m); -2 if -0.10 <= H_bias_fit < -0.05;-1 when -0.05 <= H_bias_fit < -0.01; 0 if -0.01 <= H_bias_fit < 0.01 (m); 1 if 0.01 <= H_bias_fit < 0.05; 2 if 0.05 < H_bias_fit < 0.10; 3 if 0.10 <= H_bias_fit; 4 if H_bias_fit is invalid. (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 equal_to_or_above_threshold6 invalid (Type is String)
- flag_values: -3, -2, -1, 0, 1, 2, 3, 4 (Type is Int32)
- valid_min: -3 (Type is Int32)
- valid_max: 4 (Type is Int32)
- origname: qf_bias_fit (Type is String)
- fullnamepath: /gt2r/qf_bias_fit (Type is String)
- coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String)

gt2r_sseg_mean_lon[ /gt2r_delta_time= 0..5099] (Type is Float64)

attributes
- units: degrees_east (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Short Segment Mean Longitude (Type is String)
- description: Mean longitude of the signal-qualified photons in a short segment. (Type is String)
- source: Inland Water ATBD (Type is String)
- valid_min: -180.00000000000000 (Type is Float64)
- valid_max: 180.00000000000000 (Type is Float64)
- origname: sseg_mean_lon (Type is String)
- fullnamepath: /gt2r/sseg_mean_lon (Type is String)
- coordinates: gt2r_delta_time (Type is String)

gt2r_qf_ice[ /gt2r_delta_time= 0..5099] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Ice Quality Flag (Type is String)
- description: The quality flag for ice describes the likelihood of ice on the short water body surface segment. 0 for QF_Bckgrd<= 2; 1 for 2 < QF_Bckgrd<= 4; 2 for 4 < QF_Bckgrd; 3 for (4 < QF_Bckgrd and QF_Cloud=1) (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: qf_bckgrd_le_2 qf_bckgrd_le_4 qf_bckgrd_gt_4 qf_bckgrd_w_cloud (Type is String)
- flag_values: 0, 1, 2, 3 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 3 (Type is Int32)
- origname: qf_ice (Type is String)
- fullnamepath: /gt2r/qf_ice (Type is String)
- coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String)

gt2r_inland_water_body_type[ /gt2r_delta_time= 0..5099] (Type is Int8)

attributes
- _FillValue: 127 (Type is Int8)
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Body Type (Type is String)
- description: Type of Inland Water Body, where 1=Lake, 2=Known Reservoir, 3=(Reserved for future use), 4=Ephemeral Water, 5=River, 6=Estuary or Bay, 7=Coastal Water, 8=Reserved, 9=Reserved (Type is String)
- source: ATL13 ATBD, Section 5.3.1 (C) (Type is String)
- flag_meanings: Lake Known_Reservoir Reserved_for_future_use Ephemeral_Water River Estuary_or_Bay Coastal_Water Reserved Reserved (Type is String)
- flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 (Type is Int8)
- valid_min: 1 (Type is Int8)
- valid_max: 9 (Type is Int8)
- origname: inland_water_body_type (Type is String)
- fullnamepath: /gt2r/inland_water_body_type (Type is String)
- coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String)

gt2r_inland_water_body_id[ /gt2r_delta_time= 0..5099] (Type is Int32)

attributes
- contentType: referenceInformation (Type is String)
- long_name: Body ID (Type is String)
- description: Identifying signature of an individual inland water body. Each body of water is represented by a unique numeric value. (Type is String)
- source: ATL13 ATBD, Section 5.3.1 (C) (Type is String)
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- origname: inland_water_body_id (Type is String)
- fullnamepath: /gt2r/inland_water_body_id (Type is String)
- coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String)

gt2r_segment_geoid[ /gt2r_delta_time= 0..5099] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: meters (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Segment Geoid (Type is String)
- description: Applicable geoid value at reporting location for all short segment statistics. (Type is String)
- source: ATL03 (Type is String)
- origname: segment_geoid (Type is String)
- fullnamepath: /gt2r/segment_geoid (Type is String)
- coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String)

gt2r_qf_sseg_length[ /gt2r_delta_time= 0..5099] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Short Segment Length flag (Type is String)
- description: The Short Segment Length flag is set based on the length of the short segment. The flag is set as follows: 0 if sseg_length< 50 (meters); 1 if 50 <sseg_length < 150 (meters); 2 if 150 < sseg_length< 300 (meters); 3 if 300 < sseg_length. (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: below_threshold1 below_threshold2 below_threshold3 above_threshold4 (Type is String)
- flag_values: 0, 1, 2, 3 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 3 (Type is Int32)
- origname: qf_sseg_length (Type is String)
- fullnamepath: /gt2r/qf_sseg_length (Type is String)
- coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String)

gt2r_qf_lseg_length[ /gt2r_delta_time= 0..5099] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Long Segment Length flag (Type is String)
- description: The Long Segment Length flag is set based on the length of the long segment. The flag is set as follows: 0 if Lseg_length < 500 (meters); 1 if 50 <= Lseg_length < 1500 (meters); 2 if 150 <= Lseg_length < 3000 (meters); 3 if 3000 <= Lseg_length (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: below_threshold1 below_threshold2 below_threshold3 above_threshold4 (Type is String)
- flag_values: 0, 1, 2, 3 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 3 (Type is Int32)
- origname: qf_lseg_length (Type is String)
- fullnamepath: /gt2r/qf_lseg_length (Type is String)
- coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String)

gt2r_significant_wave_ht[ /gt2r_delta_time= 0..5099] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: meters (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: SWH (Type is String)
- description: Significant wave height (Type is String)
- source: section 5.3.3 (C) (Type is String)
- origname: significant_wave_ht (Type is String)
- fullnamepath: /gt2r/significant_wave_ht (Type is String)
- coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String)

gt2r_qf_bias_em[ /gt2r_delta_time= 0..5099] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: EM Bias Quality Flag (Type is String)
- description: The Electromagnetic Bias flag is set based on threshold checks for the estimated electromagnetic height bias. The flag is set as follows: -3 if H_bias_EM < -0.10 (m); -2 if -0.10 < H_bias_EM < -0.05; -1 if -0.05 <= H_bias_EM < -0.01; 0 if -0.01 <= H_bias_EM < 0.01 (m); 1 if 0.01 <= H_bias_EM < 0.05; 2 if 0.05 <= H_bias_EM < 0.10; 3 if 0.10 < H_bias_EM; 4 if H_bias_EM is invalid. (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 above_threshold6 invalid (Type is String)
- flag_values: -3, -2, -1, 0, 1, 2, 3, 4 (Type is Int32)
- valid_min: -3 (Type is Int32)
- valid_max: 4 (Type is Int32)
- origname: qf_bias_em (Type is String)
- fullnamepath: /gt2r/qf_bias_em (Type is String)
- coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String)

gt2r_segment_id_end[ /gt2r_delta_time= 0..5099] (Type is Int32)

attributes
- units: 1 (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: Last ATL03 Segment ID (Type is String)
- description: Last ATL03 segment_id associated with the photons within this inland water segment. (Type is String)
- source: ATL03 (Type is String)
- origname: segment_id_end (Type is String)
- fullnamepath: /gt2r/segment_id_end (Type is String)
- coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String)

gt2r_stdev_water_surf[ /gt2r_delta_time= 0..5099] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: meters (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: Surface StDev (Type is String)
- description: Standard deviation of water surface, calculated over long segments with result reported at each short segment location tag contained within. (Type is String)
- source: section 5.3.3 (C) (Type is String)
- origname: stdev_water_surf (Type is String)
- fullnamepath: /gt2r/stdev_water_surf (Type is String)
- coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String)

gt2r_qf_iwp[ /gt2r_delta_time= 0..5099] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- contentType: qualityInformation (Type is String)
- long_name: Inland Water Segment Processing Flag (Type is String)
- description: Inland Water segment Processing (IWP) flag to describe the level of processing the inland water algorithm was able to perform on each short segment based on the data available, ranging from 1 to 7. (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: 1_short_segment 2_short_segments 3_to_5_short_segments 6_to_7_short_segments 8_to_9_short_segments 10_to_29_short_segments 30_or_more_short_segments_analyzed (Type is String)
- flag_values: 1, 2, 3, 4, 5, 6, 7 (Type is Int32)
- valid_min: 1 (Type is Int32)
- valid_max: 7 (Type is Int32)
- origname: qf_iwp (Type is String)
- fullnamepath: /gt2r/qf_iwp (Type is String)
- coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String)

gt2r_segment_id_beg[ /gt2r_delta_time= 0..5099] (Type is Int32)

attributes
- units: 1 (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: First ATL03 Segment ID (Type is String)
- description: First ATL03 segment_id associated with the photons within this inland water segment. (Type is String)
- source: ATL03 (Type is String)
- origname: segment_id_beg (Type is String)
- fullnamepath: /gt2r/segment_id_beg (Type is String)
- coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String)

gt2r_cycle[ /gt2r_delta_time= 0..5099] (Type is Int8)

attributes
- units: counts (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: Cycle Number (Type is String)
- description: Tracks the number of 91-day cycles in the mission, beginning with 01. (Type is String)
- source: ATL03 (Type is String)
- valid_min: 0 (Type is Int8)
- valid_max: 50 (Type is Int8)
- origname: cycle (Type is String)
- fullnamepath: /gt2r/cycle (Type is String)
- coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String)

gt2r_qf_subsurf_anomaly[ /gt2r_delta_time= 0..5099] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Subsurface Anomaly Quality Flag (Type is String)
- description: The subsurface anomaly flag is defined as in atbd section 4.5.5.5 above. It is computed for each bin between 6 Stdev below the mean of the integrated model to 20m depth. The anomaly is set to 0 when bin value +<+3* subsurface mean plus s~sub~subsurface and set to 1 when subsurface bin value is other (meaning an anomaly exists) (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: unlikely_subsurface likely_subsurface (Type is String)
- flag_values: 0, 1 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 1 (Type is Int32)
- origname: qf_subsurf_anomaly (Type is String)
- fullnamepath: /gt2r/qf_subsurf_anomaly (Type is String)
- coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String)

gt2r_subsurface_attenuation[ /gt2r_delta_time= 0..5099] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: 1 (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Subsurface Attenuation (Type is String)
- description: Subsurface attenuation coefficient. (Type is String)
- source: section 5.3.4 (A) (Type is String)
- origname: subsurface_attenuation (Type is String)
- fullnamepath: /gt2r/subsurface_attenuation (Type is String)
- coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String)

gt2r_inland_water_body_region[ /gt2r_delta_time= 0..5099] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: Body Region (Type is String)
- description: ATL13-created shapefile representing relevant bodies of water over which to implement the ATL13 water surface finding algorithm only within a region of processing interest. (Type is String)
- source: section 5.3.1 (A) (Type is String)
- origname: inland_water_body_region (Type is String)
- fullnamepath: /gt2r/inland_water_body_region (Type is String)
- coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String)

gt2r_ice_flag[ /gt2r_delta_time= 0..5099] (Type is Int8)

attributes
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Ice Flag (Type is String)
- description: Flag indicating significant existence of ice on the water surface (Type is String)
- source: section 5.3.2 (D) (Type is String)
- flag_meanings: no_ice ice (Type is String)
- flag_values: 0, 1 (Type is Int8)
- valid_min: 0 (Type is Int8)
- valid_max: 1 (Type is Int8)
- origname: ice_flag (Type is String)
- fullnamepath: /gt2r/ice_flag (Type is String)
- coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String)

gt2r_segment_lon[ /gt2r_delta_time= 0..5099] (Type is Float64)

attributes
- units: degrees_east (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Longitude (Type is String)
- standard_name: longitude (Type is String)
- description: Longitude of reporting location (Type is String)
- source: section 5.3.5 (A) (Type is String)
- valid_min: -180.00000000000000 (Type is Float64)
- valid_max: 180.00000000000000 (Type is Float64)
- origname: segment_lon (Type is String)
- fullnamepath: /gt2r/segment_lon (Type is String)
- coordinates: gt2r_delta_time gt2r_segment_lat (Type is String)

gt2r_ht_ortho[ /gt2r_delta_time= 0..5099] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: meters (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Orthometric Height (Type is String)
- description: Orthometric height converted from ellipsoidal height. (Type is String)
- source: section 5.3.5 (A) (Type is String)
- origname: ht_ortho (Type is String)
- fullnamepath: /gt2r/ht_ortho (Type is String)
- coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String)

gt2r_segment_lat[ /gt2r_delta_time= 0..5099] (Type is Float64)

attributes
- units: degrees_north (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Latitude (Type is String)
- standard_name: latitude (Type is String)
- description: Latitude of reporting location (Type is String)
- source: section 5.3.5 (A) (Type is String)
- valid_min: -90.000000000000000 (Type is Float64)
- valid_max: 90.000000000000000 (Type is Float64)
- origname: segment_lat (Type is String)
- fullnamepath: /gt2r/segment_lat (Type is String)
- coordinates: gt2r_delta_time gt2r_segment_lon (Type is String)

gt2r_ht_water_surf[ /gt2r_delta_time= 0..5099] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: meters (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Water Surface Height (Type is String)
- description: Water surface height with reference to WGS84 ellipsoid (Type is String)
- source: section 5.3.5 (A) (Type is String)
- origname: ht_water_surf (Type is String)
- fullnamepath: /gt2r/ht_water_surf (Type is String)
- coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String)

gt2r_err_ht_water_surf[ /gt2r_delta_time= 0..5099] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Height Error (Type is String)
- description: Error included in heights reported in ht_water_surf. (Type is String)
- source: section 5.3.3 (C) (Type is String)
- origname: err_ht_water_surf (Type is String)
- fullnamepath: /gt2r/err_ht_water_surf (Type is String)
- coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String)

gt2r_atl13refid[ /gt2r_delta_time= 0..5099] (Type is Int64)

attributes
- _FillValue: 0 (Type is Int64)
- units: 1 (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: ATL13 Reference ID (Type is String)
- description: Unique aggregate reference number for each shape in the ATL13 Inland Water Body Mask, where digit 1 = type, digit 2 = size, digit 3 = source, and digits 4-10 = shape id (Type is String)
- source: ATL13 ATBD, Section 5.3.1 (C) (Type is String)
- origname: atl13refid (Type is String)
- fullnamepath: /gt2r/atl13refid (Type is String)
- coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String)

gt2r_qf_cloud[ /gt2r_delta_time= 0..5099] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Consolidated cloud flag (Type is String)
- description: This flag is a combination of multiple flags (cloud_flag_atm, cloud_flag_asr, and bsnow_con) and takes daytime/nighttime into consideration. A value of 1 means clouds or blowing snow are likely present. A value of 0 indicates the likely absence of clouds or blowing snow. From the ATL09 data closest to the segment time. (Type is String)
- source: ATL09 (Type is String)
- flag_meanings: likely_clear likely_cloudy (Type is String)
- flag_values: 0, 1 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 1 (Type is Int32)
- origname: qf_cloud (Type is String)
- fullnamepath: /gt2r/qf_cloud (Type is String)
- coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String)

gt2r_inland_water_body_source[ /gt2r_delta_time= 0..5099] (Type is Int8)

attributes
- _FillValue: 127 (Type is Int8)
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Body Source (Type is String)
- description: Source of Inland Water Body shape, where 1=HydroLAKES, 2=Global Lakes and Wetlands Database, 3=Named Marine Water Bodies, 4=GSHHG Shoreline, 5=Reserved, 6=Reserved, 7=Reserved, 8=Reserved, 9=Reserved (Type is String)
- source: ATL13 ATBD, Section 5.3.1 (C) (Type is String)
- flag_meanings: HydroLAKES Global_Lakes_and_Wetlands_Database Named_Marine_Water_Bodies GSHHG_Shoreline Reserved Reserved Reserved Reserved Reserved (Type is String)
- flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 (Type is Int8)
- valid_min: 1 (Type is Int8)
- valid_max: 9 (Type is Int8)
- origname: inland_water_body_source (Type is String)
- fullnamepath: /gt2r/inland_water_body_source (Type is String)
- coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String)

gt2r_inland_water_body_size[ /gt2r_delta_time= 0..5099] (Type is Int8)

attributes
- _FillValue: 127 (Type is Int8)
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Body Size (Type is String)
- description: Size of Inland Water Body, A=area, where 1=A>10,000 km2, 2=10,000>A>=1,000, 3=1,000>A>=100, 4=100>A>=10, 5=10>A>=1, 6=1>A>=0.1, 7=0.01>A, 8=Reserved, 9=Reserved (Type is String)
- source: ATL13 ATBD, Section 5.3.1 (C) (Type is String)
- flag_meanings: A>10000 10000>A>=1000 1000>A>=100 100>A>=10 10>A>=1 1>A>=0.1 0.01>A Reserved Reserved (Type is String)
- flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 (Type is Int8)
- valid_min: 1 (Type is Int8)
- valid_max: 9 (Type is Int8)
- origname: inland_water_body_size (Type is String)
- fullnamepath: /gt2r/inland_water_body_size (Type is String)
- coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String)

gt2r_err_slope_trk[ /gt2r_delta_time= 0..5099] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Slope Error (Type is String)
- description: Error included in segment_slope_trk_local. (Type is String)
- source: section 5.3.3 (C) (Type is String)
- origname: err_slope_trk (Type is String)
- fullnamepath: /gt2r/err_slope_trk (Type is String)
- coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String)

gt2r_segment_slope_trk_bdy[ /gt2r_delta_time= 0..5099] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: 1 (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Water Body Slope (Type is String)
- description: Along track water body surface slope. (Type is String)
- source: section 5.3.5 (A) (Type is String)
- origname: segment_slope_trk_bdy (Type is String)
- fullnamepath: /gt2r/segment_slope_trk_bdy (Type is String)
- coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String)

gt2r_sseg_mean_lat[ /gt2r_delta_time= 0..5099] (Type is Float64)

attributes
- _FillValue: 1.7976931348623157e+308 (Type is Float64)
- units: degrees_north (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Short Segment Mean Latitude (Type is String)
- description: Mean latitude of the signal-qualified photons in a short segment. (Type is String)
- source: Inland Water ATBD (Type is String)
- valid_min: -90.000000000000000 (Type is Float64)
- valid_max: 90.000000000000000 (Type is Float64)
- origname: sseg_mean_lat (Type is String)
- fullnamepath: /gt2r/sseg_mean_lat (Type is String)
- coordinates: gt2r_delta_time (Type is String)

gt2r_qf_spec_width[ /gt2r_delta_time= 0..5099] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Spectral Width Flag (Type is String)
- description: The Spectral Width flag is set based on threshold checks for the estimated Spectral Width. The flag is set as follows: 0 if spec_width < 0.5; 1 if spec_width >= +0.5. (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: below_0.5 above_0.5 (Type is String)
- flag_values: 0, 1 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 1 (Type is Int32)
- origname: qf_spec_width (Type is String)
- fullnamepath: /gt2r/qf_spec_width (Type is String)
- coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String)

gt2r_qf_bckgrd[ /gt2r_delta_time= 0..5099] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Background Quality Flag (Type is String)
- description: Describes the degree of background photons present in each short segment. bckgrd_dnsty_threshold1= 0.001 (counts per bi per Lseg); bckgrd_dnsty_threshold2= 0.01 (counts per bin per Lseg); bckgrd_dnsty_threshold3= 0.05 (counts per bin per Lseg); bckgrd_dnsty_threshold4= 0.1 (counts per bin per Lseg); bckgrd_dnsty_threshold5= 0.3 (counts per bin per Lseg); bckgrd_dnsty_threshold6= 0.5 (counts per bin per Lseg) (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: equal_to_or_below_threshold1 equal_to_or_below_threshold2 equal_to_or_below_threshold3 equal_to_or_below_threshold4 equal_to_or_below_threshold5 equal_to_or_below_threshold6 above_threshold6 (Type is String)
- flag_values: 0, 1, 2, 3, 4, 5, 6 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 6 (Type is Int32)
- origname: qf_bckgrd (Type is String)
- fullnamepath: /gt2r/qf_bckgrd (Type is String)
- coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String)

gt2r_sseg_mean_time[ /gt2r_delta_time= 0..5099] (Type is Float64)

attributes
- contentType: auxiliaryInformation (Type is String)
- long_name: Short Segment Mean Time (Type is String)
- description: Mean time of the signal-qualified photons in a short segment. (Type is String)
- source: Inland Water ATBD (Type is String)
- _FillValue: 1.7976931348623157e+308 (Type is Float64)
- units: Seconds since 2018-01-01 (Type is String)
- origname: sseg_mean_time (Type is String)
- fullnamepath: /gt2r/sseg_mean_time (Type is String)
- coordinates: gt2r_delta_time (Type is String)

gt1l_rgt[ /gt1l_delta_time= 0..20075] (Type is Int16)

attributes
- units: 1 (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: Reference Ground track (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 is String)
- source: ATL03 (Type is String)
- valid_min: 1 (Type is Int16)
- valid_max: 1387 (Type is Int16)
- origname: rgt (Type is String)
- fullnamepath: /gt1l/rgt (Type is String)
- coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String)

gt1l_qf_bias_fit[ /gt1l_delta_time= 0..20075] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Height Bias Fit Quality Flag (Type is String)
- description: The height bias fit flag is set based on the value of the goodness of fit bias estimated as the difference between the centroid elevations of the observed surface water histogram and fitted integrated water surface model histogram. The flag values are set as follows: = -3 if H_bias_fit < -0.10 (m); -2 if -0.10 <= H_bias_fit < -0.05;-1 when -0.05 <= H_bias_fit < -0.01; 0 if -0.01 <= H_bias_fit < 0.01 (m); 1 if 0.01 <= H_bias_fit < 0.05; 2 if 0.05 < H_bias_fit < 0.10; 3 if 0.10 <= H_bias_fit; 4 if H_bias_fit is invalid. (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 equal_to_or_above_threshold6 invalid (Type is String)
- flag_values: -3, -2, -1, 0, 1, 2, 3, 4 (Type is Int32)
- valid_min: -3 (Type is Int32)
- valid_max: 4 (Type is Int32)
- origname: qf_bias_fit (Type is String)
- fullnamepath: /gt1l/qf_bias_fit (Type is String)
- coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String)

gt1l_sseg_mean_lon[ /gt1l_delta_time= 0..20075] (Type is Float64)

attributes
- units: degrees_east (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Short Segment Mean Longitude (Type is String)
- description: Mean longitude of the signal-qualified photons in a short segment. (Type is String)
- source: Inland Water ATBD (Type is String)
- valid_min: -180.00000000000000 (Type is Float64)
- valid_max: 180.00000000000000 (Type is Float64)
- origname: sseg_mean_lon (Type is String)
- fullnamepath: /gt1l/sseg_mean_lon (Type is String)
- coordinates: gt1l_delta_time (Type is String)

gt1l_qf_ice[ /gt1l_delta_time= 0..20075] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Ice Quality Flag (Type is String)
- description: The quality flag for ice describes the likelihood of ice on the short water body surface segment. 0 for QF_Bckgrd<= 2; 1 for 2 < QF_Bckgrd<= 4; 2 for 4 < QF_Bckgrd; 3 for (4 < QF_Bckgrd and QF_Cloud=1) (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: qf_bckgrd_le_2 qf_bckgrd_le_4 qf_bckgrd_gt_4 qf_bckgrd_w_cloud (Type is String)
- flag_values: 0, 1, 2, 3 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 3 (Type is Int32)
- origname: qf_ice (Type is String)
- fullnamepath: /gt1l/qf_ice (Type is String)
- coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String)

gt1l_inland_water_body_type[ /gt1l_delta_time= 0..20075] (Type is Int8)

attributes
- _FillValue: 127 (Type is Int8)
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Body Type (Type is String)
- description: Type of Inland Water Body, where 1=Lake, 2=Known Reservoir, 3=(Reserved for future use), 4=Ephemeral Water, 5=River, 6=Estuary or Bay, 7=Coastal Water, 8=Reserved, 9=Reserved (Type is String)
- source: ATL13 ATBD, Section 5.3.1 (C) (Type is String)
- flag_meanings: Lake Known_Reservoir Reserved_for_future_use Ephemeral_Water River Estuary_or_Bay Coastal_Water Reserved Reserved (Type is String)
- flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 (Type is Int8)
- valid_min: 1 (Type is Int8)
- valid_max: 9 (Type is Int8)
- origname: inland_water_body_type (Type is String)
- fullnamepath: /gt1l/inland_water_body_type (Type is String)
- coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String)

gt1l_inland_water_body_id[ /gt1l_delta_time= 0..20075] (Type is Int32)

attributes
- contentType: referenceInformation (Type is String)
- long_name: Body ID (Type is String)
- description: Identifying signature of an individual inland water body. Each body of water is represented by a unique numeric value. (Type is String)
- source: ATL13 ATBD, Section 5.3.1 (C) (Type is String)
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- origname: inland_water_body_id (Type is String)
- fullnamepath: /gt1l/inland_water_body_id (Type is String)
- coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String)

gt1l_segment_geoid[ /gt1l_delta_time= 0..20075] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: meters (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Segment Geoid (Type is String)
- description: Applicable geoid value at reporting location for all short segment statistics. (Type is String)
- source: ATL03 (Type is String)
- origname: segment_geoid (Type is String)
- fullnamepath: /gt1l/segment_geoid (Type is String)
- coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String)

gt1l_qf_sseg_length[ /gt1l_delta_time= 0..20075] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Short Segment Length flag (Type is String)
- description: The Short Segment Length flag is set based on the length of the short segment. The flag is set as follows: 0 if sseg_length< 50 (meters); 1 if 50 <sseg_length < 150 (meters); 2 if 150 < sseg_length< 300 (meters); 3 if 300 < sseg_length. (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: below_threshold1 below_threshold2 below_threshold3 above_threshold4 (Type is String)
- flag_values: 0, 1, 2, 3 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 3 (Type is Int32)
- origname: qf_sseg_length (Type is String)
- fullnamepath: /gt1l/qf_sseg_length (Type is String)
- coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String)

gt1l_qf_lseg_length[ /gt1l_delta_time= 0..20075] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Long Segment Length flag (Type is String)
- description: The Long Segment Length flag is set based on the length of the long segment. The flag is set as follows: 0 if Lseg_length < 500 (meters); 1 if 50 <= Lseg_length < 1500 (meters); 2 if 150 <= Lseg_length < 3000 (meters); 3 if 3000 <= Lseg_length (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: below_threshold1 below_threshold2 below_threshold3 above_threshold4 (Type is String)
- flag_values: 0, 1, 2, 3 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 3 (Type is Int32)
- origname: qf_lseg_length (Type is String)
- fullnamepath: /gt1l/qf_lseg_length (Type is String)
- coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String)

gt1l_significant_wave_ht[ /gt1l_delta_time= 0..20075] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: meters (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: SWH (Type is String)
- description: Significant wave height (Type is String)
- source: section 5.3.3 (C) (Type is String)
- origname: significant_wave_ht (Type is String)
- fullnamepath: /gt1l/significant_wave_ht (Type is String)
- coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String)

gt1l_qf_bias_em[ /gt1l_delta_time= 0..20075] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: EM Bias Quality Flag (Type is String)
- description: The Electromagnetic Bias flag is set based on threshold checks for the estimated electromagnetic height bias. The flag is set as follows: -3 if H_bias_EM < -0.10 (m); -2 if -0.10 < H_bias_EM < -0.05; -1 if -0.05 <= H_bias_EM < -0.01; 0 if -0.01 <= H_bias_EM < 0.01 (m); 1 if 0.01 <= H_bias_EM < 0.05; 2 if 0.05 <= H_bias_EM < 0.10; 3 if 0.10 < H_bias_EM; 4 if H_bias_EM is invalid. (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 above_threshold6 invalid (Type is String)
- flag_values: -3, -2, -1, 0, 1, 2, 3, 4 (Type is Int32)
- valid_min: -3 (Type is Int32)
- valid_max: 4 (Type is Int32)
- origname: qf_bias_em (Type is String)
- fullnamepath: /gt1l/qf_bias_em (Type is String)
- coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String)

gt1l_segment_id_end[ /gt1l_delta_time= 0..20075] (Type is Int32)

attributes
- units: 1 (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: Last ATL03 Segment ID (Type is String)
- description: Last ATL03 segment_id associated with the photons within this inland water segment. (Type is String)
- source: ATL03 (Type is String)
- origname: segment_id_end (Type is String)
- fullnamepath: /gt1l/segment_id_end (Type is String)
- coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String)

gt1l_stdev_water_surf[ /gt1l_delta_time= 0..20075] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: meters (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: Surface StDev (Type is String)
- description: Standard deviation of water surface, calculated over long segments with result reported at each short segment location tag contained within. (Type is String)
- source: section 5.3.3 (C) (Type is String)
- origname: stdev_water_surf (Type is String)
- fullnamepath: /gt1l/stdev_water_surf (Type is String)
- coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String)

gt1l_qf_iwp[ /gt1l_delta_time= 0..20075] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- contentType: qualityInformation (Type is String)
- long_name: Inland Water Segment Processing Flag (Type is String)
- description: Inland Water segment Processing (IWP) flag to describe the level of processing the inland water algorithm was able to perform on each short segment based on the data available, ranging from 1 to 7. (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: 1_short_segment 2_short_segments 3_to_5_short_segments 6_to_7_short_segments 8_to_9_short_segments 10_to_29_short_segments 30_or_more_short_segments_analyzed (Type is String)
- flag_values: 1, 2, 3, 4, 5, 6, 7 (Type is Int32)
- valid_min: 1 (Type is Int32)
- valid_max: 7 (Type is Int32)
- origname: qf_iwp (Type is String)
- fullnamepath: /gt1l/qf_iwp (Type is String)
- coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String)

gt1l_segment_id_beg[ /gt1l_delta_time= 0..20075] (Type is Int32)

attributes
- units: 1 (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: First ATL03 Segment ID (Type is String)
- description: First ATL03 segment_id associated with the photons within this inland water segment. (Type is String)
- source: ATL03 (Type is String)
- origname: segment_id_beg (Type is String)
- fullnamepath: /gt1l/segment_id_beg (Type is String)
- coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String)

gt1l_cycle[ /gt1l_delta_time= 0..20075] (Type is Int8)

attributes
- units: counts (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: Cycle Number (Type is String)
- description: Tracks the number of 91-day cycles in the mission, beginning with 01. (Type is String)
- source: ATL03 (Type is String)
- valid_min: 0 (Type is Int8)
- valid_max: 50 (Type is Int8)
- origname: cycle (Type is String)
- fullnamepath: /gt1l/cycle (Type is String)
- coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String)

gt1l_qf_subsurf_anomaly[ /gt1l_delta_time= 0..20075] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Subsurface Anomaly Quality Flag (Type is String)
- description: The subsurface anomaly flag is defined as in atbd section 4.5.5.5 above. It is computed for each bin between 6 Stdev below the mean of the integrated model to 20m depth. The anomaly is set to 0 when bin value +<+3* subsurface mean plus s~sub~subsurface and set to 1 when subsurface bin value is other (meaning an anomaly exists) (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: unlikely_subsurface likely_subsurface (Type is String)
- flag_values: 0, 1 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 1 (Type is Int32)
- origname: qf_subsurf_anomaly (Type is String)
- fullnamepath: /gt1l/qf_subsurf_anomaly (Type is String)
- coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String)

gt1l_subsurface_attenuation[ /gt1l_delta_time= 0..20075] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: 1 (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Subsurface Attenuation (Type is String)
- description: Subsurface attenuation coefficient. (Type is String)
- source: section 5.3.4 (A) (Type is String)
- origname: subsurface_attenuation (Type is String)
- fullnamepath: /gt1l/subsurface_attenuation (Type is String)
- coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String)

gt1l_inland_water_body_region[ /gt1l_delta_time= 0..20075] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: Body Region (Type is String)
- description: ATL13-created shapefile representing relevant bodies of water over which to implement the ATL13 water surface finding algorithm only within a region of processing interest. (Type is String)
- source: section 5.3.1 (A) (Type is String)
- origname: inland_water_body_region (Type is String)
- fullnamepath: /gt1l/inland_water_body_region (Type is String)
- coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String)

gt1l_ice_flag[ /gt1l_delta_time= 0..20075] (Type is Int8)

attributes
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Ice Flag (Type is String)
- description: Flag indicating significant existence of ice on the water surface (Type is String)
- source: section 5.3.2 (D) (Type is String)
- flag_meanings: no_ice ice (Type is String)
- flag_values: 0, 1 (Type is Int8)
- valid_min: 0 (Type is Int8)
- valid_max: 1 (Type is Int8)
- origname: ice_flag (Type is String)
- fullnamepath: /gt1l/ice_flag (Type is String)
- coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String)

gt1l_segment_lon[ /gt1l_delta_time= 0..20075] (Type is Float64)

attributes
- units: degrees_east (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Longitude (Type is String)
- standard_name: longitude (Type is String)
- description: Longitude of reporting location (Type is String)
- source: section 5.3.5 (A) (Type is String)
- valid_min: -180.00000000000000 (Type is Float64)
- valid_max: 180.00000000000000 (Type is Float64)
- origname: segment_lon (Type is String)
- fullnamepath: /gt1l/segment_lon (Type is String)
- coordinates: gt1l_delta_time gt1l_segment_lat (Type is String)

gt1l_ht_ortho[ /gt1l_delta_time= 0..20075] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: meters (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Orthometric Height (Type is String)
- description: Orthometric height converted from ellipsoidal height. (Type is String)
- source: section 5.3.5 (A) (Type is String)
- origname: ht_ortho (Type is String)
- fullnamepath: /gt1l/ht_ortho (Type is String)
- coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String)

gt1l_segment_lat[ /gt1l_delta_time= 0..20075] (Type is Float64)

attributes
- units: degrees_north (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Latitude (Type is String)
- standard_name: latitude (Type is String)
- description: Latitude of reporting location (Type is String)
- source: section 5.3.5 (A) (Type is String)
- valid_min: -90.000000000000000 (Type is Float64)
- valid_max: 90.000000000000000 (Type is Float64)
- origname: segment_lat (Type is String)
- fullnamepath: /gt1l/segment_lat (Type is String)
- coordinates: gt1l_delta_time gt1l_segment_lon (Type is String)

gt1l_ht_water_surf[ /gt1l_delta_time= 0..20075] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: meters (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Water Surface Height (Type is String)
- description: Water surface height with reference to WGS84 ellipsoid (Type is String)
- source: section 5.3.5 (A) (Type is String)
- origname: ht_water_surf (Type is String)
- fullnamepath: /gt1l/ht_water_surf (Type is String)
- coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String)

gt1l_err_ht_water_surf[ /gt1l_delta_time= 0..20075] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Height Error (Type is String)
- description: Error included in heights reported in ht_water_surf. (Type is String)
- source: section 5.3.3 (C) (Type is String)
- origname: err_ht_water_surf (Type is String)
- fullnamepath: /gt1l/err_ht_water_surf (Type is String)
- coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String)

gt1l_atl13refid[ /gt1l_delta_time= 0..20075] (Type is Int64)

attributes
- _FillValue: 0 (Type is Int64)
- units: 1 (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: ATL13 Reference ID (Type is String)
- description: Unique aggregate reference number for each shape in the ATL13 Inland Water Body Mask, where digit 1 = type, digit 2 = size, digit 3 = source, and digits 4-10 = shape id (Type is String)
- source: ATL13 ATBD, Section 5.3.1 (C) (Type is String)
- origname: atl13refid (Type is String)
- fullnamepath: /gt1l/atl13refid (Type is String)
- coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String)

gt1l_qf_cloud[ /gt1l_delta_time= 0..20075] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Consolidated cloud flag (Type is String)
- description: This flag is a combination of multiple flags (cloud_flag_atm, cloud_flag_asr, and bsnow_con) and takes daytime/nighttime into consideration. A value of 1 means clouds or blowing snow are likely present. A value of 0 indicates the likely absence of clouds or blowing snow. From the ATL09 data closest to the segment time. (Type is String)
- source: ATL09 (Type is String)
- flag_meanings: likely_clear likely_cloudy (Type is String)
- flag_values: 0, 1 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 1 (Type is Int32)
- origname: qf_cloud (Type is String)
- fullnamepath: /gt1l/qf_cloud (Type is String)
- coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String)

gt1l_inland_water_body_source[ /gt1l_delta_time= 0..20075] (Type is Int8)

attributes
- _FillValue: 127 (Type is Int8)
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Body Source (Type is String)
- description: Source of Inland Water Body shape, where 1=HydroLAKES, 2=Global Lakes and Wetlands Database, 3=Named Marine Water Bodies, 4=GSHHG Shoreline, 5=Reserved, 6=Reserved, 7=Reserved, 8=Reserved, 9=Reserved (Type is String)
- source: ATL13 ATBD, Section 5.3.1 (C) (Type is String)
- flag_meanings: HydroLAKES Global_Lakes_and_Wetlands_Database Named_Marine_Water_Bodies GSHHG_Shoreline Reserved Reserved Reserved Reserved Reserved (Type is String)
- flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 (Type is Int8)
- valid_min: 1 (Type is Int8)
- valid_max: 9 (Type is Int8)
- origname: inland_water_body_source (Type is String)
- fullnamepath: /gt1l/inland_water_body_source (Type is String)
- coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String)

gt1l_inland_water_body_size[ /gt1l_delta_time= 0..20075] (Type is Int8)

attributes
- _FillValue: 127 (Type is Int8)
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Body Size (Type is String)
- description: Size of Inland Water Body, A=area, where 1=A>10,000 km2, 2=10,000>A>=1,000, 3=1,000>A>=100, 4=100>A>=10, 5=10>A>=1, 6=1>A>=0.1, 7=0.01>A, 8=Reserved, 9=Reserved (Type is String)
- source: ATL13 ATBD, Section 5.3.1 (C) (Type is String)
- flag_meanings: A>10000 10000>A>=1000 1000>A>=100 100>A>=10 10>A>=1 1>A>=0.1 0.01>A Reserved Reserved (Type is String)
- flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 (Type is Int8)
- valid_min: 1 (Type is Int8)
- valid_max: 9 (Type is Int8)
- origname: inland_water_body_size (Type is String)
- fullnamepath: /gt1l/inland_water_body_size (Type is String)
- coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String)

gt1l_err_slope_trk[ /gt1l_delta_time= 0..20075] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Slope Error (Type is String)
- description: Error included in segment_slope_trk_local. (Type is String)
- source: section 5.3.3 (C) (Type is String)
- origname: err_slope_trk (Type is String)
- fullnamepath: /gt1l/err_slope_trk (Type is String)
- coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String)

gt1l_segment_slope_trk_bdy[ /gt1l_delta_time= 0..20075] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: 1 (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Water Body Slope (Type is String)
- description: Along track water body surface slope. (Type is String)
- source: section 5.3.5 (A) (Type is String)
- origname: segment_slope_trk_bdy (Type is String)
- fullnamepath: /gt1l/segment_slope_trk_bdy (Type is String)
- coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String)

gt1l_sseg_mean_lat[ /gt1l_delta_time= 0..20075] (Type is Float64)

attributes
- _FillValue: 1.7976931348623157e+308 (Type is Float64)
- units: degrees_north (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Short Segment Mean Latitude (Type is String)
- description: Mean latitude of the signal-qualified photons in a short segment. (Type is String)
- source: Inland Water ATBD (Type is String)
- valid_min: -90.000000000000000 (Type is Float64)
- valid_max: 90.000000000000000 (Type is Float64)
- origname: sseg_mean_lat (Type is String)
- fullnamepath: /gt1l/sseg_mean_lat (Type is String)
- coordinates: gt1l_delta_time (Type is String)

gt1l_qf_spec_width[ /gt1l_delta_time= 0..20075] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Spectral Width Flag (Type is String)
- description: The Spectral Width flag is set based on threshold checks for the estimated Spectral Width. The flag is set as follows: 0 if spec_width < 0.5; 1 if spec_width >= +0.5. (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: below_0.5 above_0.5 (Type is String)
- flag_values: 0, 1 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 1 (Type is Int32)
- origname: qf_spec_width (Type is String)
- fullnamepath: /gt1l/qf_spec_width (Type is String)
- coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String)

gt1l_qf_bckgrd[ /gt1l_delta_time= 0..20075] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Background Quality Flag (Type is String)
- description: Describes the degree of background photons present in each short segment. bckgrd_dnsty_threshold1= 0.001 (counts per bi per Lseg); bckgrd_dnsty_threshold2= 0.01 (counts per bin per Lseg); bckgrd_dnsty_threshold3= 0.05 (counts per bin per Lseg); bckgrd_dnsty_threshold4= 0.1 (counts per bin per Lseg); bckgrd_dnsty_threshold5= 0.3 (counts per bin per Lseg); bckgrd_dnsty_threshold6= 0.5 (counts per bin per Lseg) (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: equal_to_or_below_threshold1 equal_to_or_below_threshold2 equal_to_or_below_threshold3 equal_to_or_below_threshold4 equal_to_or_below_threshold5 equal_to_or_below_threshold6 above_threshold6 (Type is String)
- flag_values: 0, 1, 2, 3, 4, 5, 6 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 6 (Type is Int32)
- origname: qf_bckgrd (Type is String)
- fullnamepath: /gt1l/qf_bckgrd (Type is String)
- coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String)

gt1l_sseg_mean_time[ /gt1l_delta_time= 0..20075] (Type is Float64)

attributes
- contentType: auxiliaryInformation (Type is String)
- long_name: Short Segment Mean Time (Type is String)
- description: Mean time of the signal-qualified photons in a short segment. (Type is String)
- source: Inland Water ATBD (Type is String)
- _FillValue: 1.7976931348623157e+308 (Type is Float64)
- units: Seconds since 2018-01-01 (Type is String)
- origname: sseg_mean_time (Type is String)
- fullnamepath: /gt1l/sseg_mean_time (Type is String)
- coordinates: gt1l_delta_time (Type is String)

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

attributes
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Granule Failure Reason (Type is String)
- description: Flag indicating granule failure reason. 0=no failure; 1=processing failure; 2=insufficient data; 3=TBD3; 4=TBD4; 5=TBD5 (Type is String)
- source: Operations (Type is String)
- flag_meanings: no_failure processing_failure insufficient_data TBD3 TBD4 TBD5 (Type is String)
- flag_values: 0, 1, 2, 3, 4, 5 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 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
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Granule Pass Flag (Type is String)
- description: Flag indicating granule quality. 0=granule passes automatic QA. 1=granule fails automatic QA. (Type is String)
- source: Operations (Type is String)
- flag_meanings: PASS FAIL (Type is String)
- flag_values: 0, 1 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 1 (Type is Int32)
- origname: qa_granule_pass_fail (Type is String)
- fullnamepath: /quality_assessment/qa_granule_pass_fail (Type is String)

gt3l_rgt[ /gt3l_delta_time= 0..20712] (Type is Int16)

attributes
- units: 1 (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: Reference Ground track (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 is String)
- source: ATL03 (Type is String)
- valid_min: 1 (Type is Int16)
- valid_max: 1387 (Type is Int16)
- origname: rgt (Type is String)
- fullnamepath: /gt3l/rgt (Type is String)
- coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String)

gt3l_qf_bias_fit[ /gt3l_delta_time= 0..20712] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Height Bias Fit Quality Flag (Type is String)
- description: The height bias fit flag is set based on the value of the goodness of fit bias estimated as the difference between the centroid elevations of the observed surface water histogram and fitted integrated water surface model histogram. The flag values are set as follows: = -3 if H_bias_fit < -0.10 (m); -2 if -0.10 <= H_bias_fit < -0.05;-1 when -0.05 <= H_bias_fit < -0.01; 0 if -0.01 <= H_bias_fit < 0.01 (m); 1 if 0.01 <= H_bias_fit < 0.05; 2 if 0.05 < H_bias_fit < 0.10; 3 if 0.10 <= H_bias_fit; 4 if H_bias_fit is invalid. (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 equal_to_or_above_threshold6 invalid (Type is String)
- flag_values: -3, -2, -1, 0, 1, 2, 3, 4 (Type is Int32)
- valid_min: -3 (Type is Int32)
- valid_max: 4 (Type is Int32)
- origname: qf_bias_fit (Type is String)
- fullnamepath: /gt3l/qf_bias_fit (Type is String)
- coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String)

gt3l_sseg_mean_lon[ /gt3l_delta_time= 0..20712] (Type is Float64)

attributes
- units: degrees_east (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Short Segment Mean Longitude (Type is String)
- description: Mean longitude of the signal-qualified photons in a short segment. (Type is String)
- source: Inland Water ATBD (Type is String)
- valid_min: -180.00000000000000 (Type is Float64)
- valid_max: 180.00000000000000 (Type is Float64)
- origname: sseg_mean_lon (Type is String)
- fullnamepath: /gt3l/sseg_mean_lon (Type is String)
- coordinates: gt3l_delta_time (Type is String)

gt3l_qf_ice[ /gt3l_delta_time= 0..20712] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Ice Quality Flag (Type is String)
- description: The quality flag for ice describes the likelihood of ice on the short water body surface segment. 0 for QF_Bckgrd<= 2; 1 for 2 < QF_Bckgrd<= 4; 2 for 4 < QF_Bckgrd; 3 for (4 < QF_Bckgrd and QF_Cloud=1) (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: qf_bckgrd_le_2 qf_bckgrd_le_4 qf_bckgrd_gt_4 qf_bckgrd_w_cloud (Type is String)
- flag_values: 0, 1, 2, 3 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 3 (Type is Int32)
- origname: qf_ice (Type is String)
- fullnamepath: /gt3l/qf_ice (Type is String)
- coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String)

gt3l_inland_water_body_type[ /gt3l_delta_time= 0..20712] (Type is Int8)

attributes
- _FillValue: 127 (Type is Int8)
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Body Type (Type is String)
- description: Type of Inland Water Body, where 1=Lake, 2=Known Reservoir, 3=(Reserved for future use), 4=Ephemeral Water, 5=River, 6=Estuary or Bay, 7=Coastal Water, 8=Reserved, 9=Reserved (Type is String)
- source: ATL13 ATBD, Section 5.3.1 (C) (Type is String)
- flag_meanings: Lake Known_Reservoir Reserved_for_future_use Ephemeral_Water River Estuary_or_Bay Coastal_Water Reserved Reserved (Type is String)
- flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 (Type is Int8)
- valid_min: 1 (Type is Int8)
- valid_max: 9 (Type is Int8)
- origname: inland_water_body_type (Type is String)
- fullnamepath: /gt3l/inland_water_body_type (Type is String)
- coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String)

gt3l_inland_water_body_id[ /gt3l_delta_time= 0..20712] (Type is Int32)

attributes
- contentType: referenceInformation (Type is String)
- long_name: Body ID (Type is String)
- description: Identifying signature of an individual inland water body. Each body of water is represented by a unique numeric value. (Type is String)
- source: ATL13 ATBD, Section 5.3.1 (C) (Type is String)
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- origname: inland_water_body_id (Type is String)
- fullnamepath: /gt3l/inland_water_body_id (Type is String)
- coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String)

gt3l_segment_geoid[ /gt3l_delta_time= 0..20712] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: meters (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Segment Geoid (Type is String)
- description: Applicable geoid value at reporting location for all short segment statistics. (Type is String)
- source: ATL03 (Type is String)
- origname: segment_geoid (Type is String)
- fullnamepath: /gt3l/segment_geoid (Type is String)
- coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String)

gt3l_qf_sseg_length[ /gt3l_delta_time= 0..20712] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Short Segment Length flag (Type is String)
- description: The Short Segment Length flag is set based on the length of the short segment. The flag is set as follows: 0 if sseg_length< 50 (meters); 1 if 50 <sseg_length < 150 (meters); 2 if 150 < sseg_length< 300 (meters); 3 if 300 < sseg_length. (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: below_threshold1 below_threshold2 below_threshold3 above_threshold4 (Type is String)
- flag_values: 0, 1, 2, 3 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 3 (Type is Int32)
- origname: qf_sseg_length (Type is String)
- fullnamepath: /gt3l/qf_sseg_length (Type is String)
- coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String)

gt3l_qf_lseg_length[ /gt3l_delta_time= 0..20712] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Long Segment Length flag (Type is String)
- description: The Long Segment Length flag is set based on the length of the long segment. The flag is set as follows: 0 if Lseg_length < 500 (meters); 1 if 50 <= Lseg_length < 1500 (meters); 2 if 150 <= Lseg_length < 3000 (meters); 3 if 3000 <= Lseg_length (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: below_threshold1 below_threshold2 below_threshold3 above_threshold4 (Type is String)
- flag_values: 0, 1, 2, 3 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 3 (Type is Int32)
- origname: qf_lseg_length (Type is String)
- fullnamepath: /gt3l/qf_lseg_length (Type is String)
- coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String)

gt3l_significant_wave_ht[ /gt3l_delta_time= 0..20712] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: meters (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: SWH (Type is String)
- description: Significant wave height (Type is String)
- source: section 5.3.3 (C) (Type is String)
- origname: significant_wave_ht (Type is String)
- fullnamepath: /gt3l/significant_wave_ht (Type is String)
- coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String)

gt3l_qf_bias_em[ /gt3l_delta_time= 0..20712] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: EM Bias Quality Flag (Type is String)
- description: The Electromagnetic Bias flag is set based on threshold checks for the estimated electromagnetic height bias. The flag is set as follows: -3 if H_bias_EM < -0.10 (m); -2 if -0.10 < H_bias_EM < -0.05; -1 if -0.05 <= H_bias_EM < -0.01; 0 if -0.01 <= H_bias_EM < 0.01 (m); 1 if 0.01 <= H_bias_EM < 0.05; 2 if 0.05 <= H_bias_EM < 0.10; 3 if 0.10 < H_bias_EM; 4 if H_bias_EM is invalid. (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 above_threshold6 invalid (Type is String)
- flag_values: -3, -2, -1, 0, 1, 2, 3, 4 (Type is Int32)
- valid_min: -3 (Type is Int32)
- valid_max: 4 (Type is Int32)
- origname: qf_bias_em (Type is String)
- fullnamepath: /gt3l/qf_bias_em (Type is String)
- coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String)

gt3l_segment_id_end[ /gt3l_delta_time= 0..20712] (Type is Int32)

attributes
- units: 1 (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: Last ATL03 Segment ID (Type is String)
- description: Last ATL03 segment_id associated with the photons within this inland water segment. (Type is String)
- source: ATL03 (Type is String)
- origname: segment_id_end (Type is String)
- fullnamepath: /gt3l/segment_id_end (Type is String)
- coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String)

gt3l_stdev_water_surf[ /gt3l_delta_time= 0..20712] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: meters (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: Surface StDev (Type is String)
- description: Standard deviation of water surface, calculated over long segments with result reported at each short segment location tag contained within. (Type is String)
- source: section 5.3.3 (C) (Type is String)
- origname: stdev_water_surf (Type is String)
- fullnamepath: /gt3l/stdev_water_surf (Type is String)
- coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String)

gt3l_qf_iwp[ /gt3l_delta_time= 0..20712] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- contentType: qualityInformation (Type is String)
- long_name: Inland Water Segment Processing Flag (Type is String)
- description: Inland Water segment Processing (IWP) flag to describe the level of processing the inland water algorithm was able to perform on each short segment based on the data available, ranging from 1 to 7. (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: 1_short_segment 2_short_segments 3_to_5_short_segments 6_to_7_short_segments 8_to_9_short_segments 10_to_29_short_segments 30_or_more_short_segments_analyzed (Type is String)
- flag_values: 1, 2, 3, 4, 5, 6, 7 (Type is Int32)
- valid_min: 1 (Type is Int32)
- valid_max: 7 (Type is Int32)
- origname: qf_iwp (Type is String)
- fullnamepath: /gt3l/qf_iwp (Type is String)
- coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String)

gt3l_segment_id_beg[ /gt3l_delta_time= 0..20712] (Type is Int32)

attributes
- units: 1 (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: First ATL03 Segment ID (Type is String)
- description: First ATL03 segment_id associated with the photons within this inland water segment. (Type is String)
- source: ATL03 (Type is String)
- origname: segment_id_beg (Type is String)
- fullnamepath: /gt3l/segment_id_beg (Type is String)
- coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String)

gt3l_cycle[ /gt3l_delta_time= 0..20712] (Type is Int8)

attributes
- units: counts (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: Cycle Number (Type is String)
- description: Tracks the number of 91-day cycles in the mission, beginning with 01. (Type is String)
- source: ATL03 (Type is String)
- valid_min: 0 (Type is Int8)
- valid_max: 50 (Type is Int8)
- origname: cycle (Type is String)
- fullnamepath: /gt3l/cycle (Type is String)
- coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String)

gt3l_qf_subsurf_anomaly[ /gt3l_delta_time= 0..20712] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Subsurface Anomaly Quality Flag (Type is String)
- description: The subsurface anomaly flag is defined as in atbd section 4.5.5.5 above. It is computed for each bin between 6 Stdev below the mean of the integrated model to 20m depth. The anomaly is set to 0 when bin value +<+3* subsurface mean plus s~sub~subsurface and set to 1 when subsurface bin value is other (meaning an anomaly exists) (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: unlikely_subsurface likely_subsurface (Type is String)
- flag_values: 0, 1 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 1 (Type is Int32)
- origname: qf_subsurf_anomaly (Type is String)
- fullnamepath: /gt3l/qf_subsurf_anomaly (Type is String)
- coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String)

gt3l_subsurface_attenuation[ /gt3l_delta_time= 0..20712] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: 1 (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Subsurface Attenuation (Type is String)
- description: Subsurface attenuation coefficient. (Type is String)
- source: section 5.3.4 (A) (Type is String)
- origname: subsurface_attenuation (Type is String)
- fullnamepath: /gt3l/subsurface_attenuation (Type is String)
- coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String)

gt3l_inland_water_body_region[ /gt3l_delta_time= 0..20712] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: Body Region (Type is String)
- description: ATL13-created shapefile representing relevant bodies of water over which to implement the ATL13 water surface finding algorithm only within a region of processing interest. (Type is String)
- source: section 5.3.1 (A) (Type is String)
- origname: inland_water_body_region (Type is String)
- fullnamepath: /gt3l/inland_water_body_region (Type is String)
- coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String)

gt3l_ice_flag[ /gt3l_delta_time= 0..20712] (Type is Int8)

attributes
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Ice Flag (Type is String)
- description: Flag indicating significant existence of ice on the water surface (Type is String)
- source: section 5.3.2 (D) (Type is String)
- flag_meanings: no_ice ice (Type is String)
- flag_values: 0, 1 (Type is Int8)
- valid_min: 0 (Type is Int8)
- valid_max: 1 (Type is Int8)
- origname: ice_flag (Type is String)
- fullnamepath: /gt3l/ice_flag (Type is String)
- coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String)

gt3l_segment_lon[ /gt3l_delta_time= 0..20712] (Type is Float64)

attributes
- units: degrees_east (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Longitude (Type is String)
- standard_name: longitude (Type is String)
- description: Longitude of reporting location (Type is String)
- source: section 5.3.5 (A) (Type is String)
- valid_min: -180.00000000000000 (Type is Float64)
- valid_max: 180.00000000000000 (Type is Float64)
- origname: segment_lon (Type is String)
- fullnamepath: /gt3l/segment_lon (Type is String)
- coordinates: gt3l_delta_time gt3l_segment_lat (Type is String)

gt3l_ht_ortho[ /gt3l_delta_time= 0..20712] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: meters (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Orthometric Height (Type is String)
- description: Orthometric height converted from ellipsoidal height. (Type is String)
- source: section 5.3.5 (A) (Type is String)
- origname: ht_ortho (Type is String)
- fullnamepath: /gt3l/ht_ortho (Type is String)
- coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String)

gt3l_segment_lat[ /gt3l_delta_time= 0..20712] (Type is Float64)

attributes
- units: degrees_north (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Latitude (Type is String)
- standard_name: latitude (Type is String)
- description: Latitude of reporting location (Type is String)
- source: section 5.3.5 (A) (Type is String)
- valid_min: -90.000000000000000 (Type is Float64)
- valid_max: 90.000000000000000 (Type is Float64)
- origname: segment_lat (Type is String)
- fullnamepath: /gt3l/segment_lat (Type is String)
- coordinates: gt3l_delta_time gt3l_segment_lon (Type is String)

gt3l_ht_water_surf[ /gt3l_delta_time= 0..20712] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: meters (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Water Surface Height (Type is String)
- description: Water surface height with reference to WGS84 ellipsoid (Type is String)
- source: section 5.3.5 (A) (Type is String)
- origname: ht_water_surf (Type is String)
- fullnamepath: /gt3l/ht_water_surf (Type is String)
- coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String)

gt3l_err_ht_water_surf[ /gt3l_delta_time= 0..20712] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Height Error (Type is String)
- description: Error included in heights reported in ht_water_surf. (Type is String)
- source: section 5.3.3 (C) (Type is String)
- origname: err_ht_water_surf (Type is String)
- fullnamepath: /gt3l/err_ht_water_surf (Type is String)
- coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String)

gt3l_atl13refid[ /gt3l_delta_time= 0..20712] (Type is Int64)

attributes
- _FillValue: 0 (Type is Int64)
- units: 1 (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: ATL13 Reference ID (Type is String)
- description: Unique aggregate reference number for each shape in the ATL13 Inland Water Body Mask, where digit 1 = type, digit 2 = size, digit 3 = source, and digits 4-10 = shape id (Type is String)
- source: ATL13 ATBD, Section 5.3.1 (C) (Type is String)
- origname: atl13refid (Type is String)
- fullnamepath: /gt3l/atl13refid (Type is String)
- coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String)

gt3l_qf_cloud[ /gt3l_delta_time= 0..20712] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Consolidated cloud flag (Type is String)
- description: This flag is a combination of multiple flags (cloud_flag_atm, cloud_flag_asr, and bsnow_con) and takes daytime/nighttime into consideration. A value of 1 means clouds or blowing snow are likely present. A value of 0 indicates the likely absence of clouds or blowing snow. From the ATL09 data closest to the segment time. (Type is String)
- source: ATL09 (Type is String)
- flag_meanings: likely_clear likely_cloudy (Type is String)
- flag_values: 0, 1 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 1 (Type is Int32)
- origname: qf_cloud (Type is String)
- fullnamepath: /gt3l/qf_cloud (Type is String)
- coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String)

gt3l_inland_water_body_source[ /gt3l_delta_time= 0..20712] (Type is Int8)

attributes
- _FillValue: 127 (Type is Int8)
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Body Source (Type is String)
- description: Source of Inland Water Body shape, where 1=HydroLAKES, 2=Global Lakes and Wetlands Database, 3=Named Marine Water Bodies, 4=GSHHG Shoreline, 5=Reserved, 6=Reserved, 7=Reserved, 8=Reserved, 9=Reserved (Type is String)
- source: ATL13 ATBD, Section 5.3.1 (C) (Type is String)
- flag_meanings: HydroLAKES Global_Lakes_and_Wetlands_Database Named_Marine_Water_Bodies GSHHG_Shoreline Reserved Reserved Reserved Reserved Reserved (Type is String)
- flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 (Type is Int8)
- valid_min: 1 (Type is Int8)
- valid_max: 9 (Type is Int8)
- origname: inland_water_body_source (Type is String)
- fullnamepath: /gt3l/inland_water_body_source (Type is String)
- coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String)

gt3l_inland_water_body_size[ /gt3l_delta_time= 0..20712] (Type is Int8)

attributes
- _FillValue: 127 (Type is Int8)
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Body Size (Type is String)
- description: Size of Inland Water Body, A=area, where 1=A>10,000 km2, 2=10,000>A>=1,000, 3=1,000>A>=100, 4=100>A>=10, 5=10>A>=1, 6=1>A>=0.1, 7=0.01>A, 8=Reserved, 9=Reserved (Type is String)
- source: ATL13 ATBD, Section 5.3.1 (C) (Type is String)
- flag_meanings: A>10000 10000>A>=1000 1000>A>=100 100>A>=10 10>A>=1 1>A>=0.1 0.01>A Reserved Reserved (Type is String)
- flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 (Type is Int8)
- valid_min: 1 (Type is Int8)
- valid_max: 9 (Type is Int8)
- origname: inland_water_body_size (Type is String)
- fullnamepath: /gt3l/inland_water_body_size (Type is String)
- coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String)

gt3l_err_slope_trk[ /gt3l_delta_time= 0..20712] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Slope Error (Type is String)
- description: Error included in segment_slope_trk_local. (Type is String)
- source: section 5.3.3 (C) (Type is String)
- origname: err_slope_trk (Type is String)
- fullnamepath: /gt3l/err_slope_trk (Type is String)
- coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String)

gt3l_segment_slope_trk_bdy[ /gt3l_delta_time= 0..20712] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: 1 (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Water Body Slope (Type is String)
- description: Along track water body surface slope. (Type is String)
- source: section 5.3.5 (A) (Type is String)
- origname: segment_slope_trk_bdy (Type is String)
- fullnamepath: /gt3l/segment_slope_trk_bdy (Type is String)
- coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String)

gt3l_sseg_mean_lat[ /gt3l_delta_time= 0..20712] (Type is Float64)

attributes
- _FillValue: 1.7976931348623157e+308 (Type is Float64)
- units: degrees_north (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Short Segment Mean Latitude (Type is String)
- description: Mean latitude of the signal-qualified photons in a short segment. (Type is String)
- source: Inland Water ATBD (Type is String)
- valid_min: -90.000000000000000 (Type is Float64)
- valid_max: 90.000000000000000 (Type is Float64)
- origname: sseg_mean_lat (Type is String)
- fullnamepath: /gt3l/sseg_mean_lat (Type is String)
- coordinates: gt3l_delta_time (Type is String)

gt3l_qf_spec_width[ /gt3l_delta_time= 0..20712] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Spectral Width Flag (Type is String)
- description: The Spectral Width flag is set based on threshold checks for the estimated Spectral Width. The flag is set as follows: 0 if spec_width < 0.5; 1 if spec_width >= +0.5. (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: below_0.5 above_0.5 (Type is String)
- flag_values: 0, 1 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 1 (Type is Int32)
- origname: qf_spec_width (Type is String)
- fullnamepath: /gt3l/qf_spec_width (Type is String)
- coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String)

gt3l_qf_bckgrd[ /gt3l_delta_time= 0..20712] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Background Quality Flag (Type is String)
- description: Describes the degree of background photons present in each short segment. bckgrd_dnsty_threshold1= 0.001 (counts per bi per Lseg); bckgrd_dnsty_threshold2= 0.01 (counts per bin per Lseg); bckgrd_dnsty_threshold3= 0.05 (counts per bin per Lseg); bckgrd_dnsty_threshold4= 0.1 (counts per bin per Lseg); bckgrd_dnsty_threshold5= 0.3 (counts per bin per Lseg); bckgrd_dnsty_threshold6= 0.5 (counts per bin per Lseg) (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: equal_to_or_below_threshold1 equal_to_or_below_threshold2 equal_to_or_below_threshold3 equal_to_or_below_threshold4 equal_to_or_below_threshold5 equal_to_or_below_threshold6 above_threshold6 (Type is String)
- flag_values: 0, 1, 2, 3, 4, 5, 6 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 6 (Type is Int32)
- origname: qf_bckgrd (Type is String)
- fullnamepath: /gt3l/qf_bckgrd (Type is String)
- coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String)

gt3l_sseg_mean_time[ /gt3l_delta_time= 0..20712] (Type is Float64)

attributes
- contentType: auxiliaryInformation (Type is String)
- long_name: Short Segment Mean Time (Type is String)
- description: Mean time of the signal-qualified photons in a short segment. (Type is String)
- source: Inland Water ATBD (Type is String)
- _FillValue: 1.7976931348623157e+308 (Type is Float64)
- units: Seconds since 2018-01-01 (Type is String)
- origname: sseg_mean_time (Type is String)
- fullnamepath: /gt3l/sseg_mean_time (Type is String)
- coordinates: gt3l_delta_time (Type is String)

gt2l_rgt[ /gt2l_delta_time= 0..16301] (Type is Int16)

attributes
- units: 1 (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: Reference Ground track (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 is String)
- source: ATL03 (Type is String)
- valid_min: 1 (Type is Int16)
- valid_max: 1387 (Type is Int16)
- origname: rgt (Type is String)
- fullnamepath: /gt2l/rgt (Type is String)
- coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String)

gt2l_qf_bias_fit[ /gt2l_delta_time= 0..16301] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Height Bias Fit Quality Flag (Type is String)
- description: The height bias fit flag is set based on the value of the goodness of fit bias estimated as the difference between the centroid elevations of the observed surface water histogram and fitted integrated water surface model histogram. The flag values are set as follows: = -3 if H_bias_fit < -0.10 (m); -2 if -0.10 <= H_bias_fit < -0.05;-1 when -0.05 <= H_bias_fit < -0.01; 0 if -0.01 <= H_bias_fit < 0.01 (m); 1 if 0.01 <= H_bias_fit < 0.05; 2 if 0.05 < H_bias_fit < 0.10; 3 if 0.10 <= H_bias_fit; 4 if H_bias_fit is invalid. (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 equal_to_or_above_threshold6 invalid (Type is String)
- flag_values: -3, -2, -1, 0, 1, 2, 3, 4 (Type is Int32)
- valid_min: -3 (Type is Int32)
- valid_max: 4 (Type is Int32)
- origname: qf_bias_fit (Type is String)
- fullnamepath: /gt2l/qf_bias_fit (Type is String)
- coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String)

gt2l_sseg_mean_lon[ /gt2l_delta_time= 0..16301] (Type is Float64)

attributes
- units: degrees_east (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Short Segment Mean Longitude (Type is String)
- description: Mean longitude of the signal-qualified photons in a short segment. (Type is String)
- source: Inland Water ATBD (Type is String)
- valid_min: -180.00000000000000 (Type is Float64)
- valid_max: 180.00000000000000 (Type is Float64)
- origname: sseg_mean_lon (Type is String)
- fullnamepath: /gt2l/sseg_mean_lon (Type is String)
- coordinates: gt2l_delta_time (Type is String)

gt2l_qf_ice[ /gt2l_delta_time= 0..16301] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Ice Quality Flag (Type is String)
- description: The quality flag for ice describes the likelihood of ice on the short water body surface segment. 0 for QF_Bckgrd<= 2; 1 for 2 < QF_Bckgrd<= 4; 2 for 4 < QF_Bckgrd; 3 for (4 < QF_Bckgrd and QF_Cloud=1) (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: qf_bckgrd_le_2 qf_bckgrd_le_4 qf_bckgrd_gt_4 qf_bckgrd_w_cloud (Type is String)
- flag_values: 0, 1, 2, 3 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 3 (Type is Int32)
- origname: qf_ice (Type is String)
- fullnamepath: /gt2l/qf_ice (Type is String)
- coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String)

gt2l_inland_water_body_type[ /gt2l_delta_time= 0..16301] (Type is Int8)

attributes
- _FillValue: 127 (Type is Int8)
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Body Type (Type is String)
- description: Type of Inland Water Body, where 1=Lake, 2=Known Reservoir, 3=(Reserved for future use), 4=Ephemeral Water, 5=River, 6=Estuary or Bay, 7=Coastal Water, 8=Reserved, 9=Reserved (Type is String)
- source: ATL13 ATBD, Section 5.3.1 (C) (Type is String)
- flag_meanings: Lake Known_Reservoir Reserved_for_future_use Ephemeral_Water River Estuary_or_Bay Coastal_Water Reserved Reserved (Type is String)
- flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 (Type is Int8)
- valid_min: 1 (Type is Int8)
- valid_max: 9 (Type is Int8)
- origname: inland_water_body_type (Type is String)
- fullnamepath: /gt2l/inland_water_body_type (Type is String)
- coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String)

gt2l_inland_water_body_id[ /gt2l_delta_time= 0..16301] (Type is Int32)

attributes
- contentType: referenceInformation (Type is String)
- long_name: Body ID (Type is String)
- description: Identifying signature of an individual inland water body. Each body of water is represented by a unique numeric value. (Type is String)
- source: ATL13 ATBD, Section 5.3.1 (C) (Type is String)
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- origname: inland_water_body_id (Type is String)
- fullnamepath: /gt2l/inland_water_body_id (Type is String)
- coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String)

gt2l_segment_geoid[ /gt2l_delta_time= 0..16301] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: meters (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Segment Geoid (Type is String)
- description: Applicable geoid value at reporting location for all short segment statistics. (Type is String)
- source: ATL03 (Type is String)
- origname: segment_geoid (Type is String)
- fullnamepath: /gt2l/segment_geoid (Type is String)
- coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String)

gt2l_qf_sseg_length[ /gt2l_delta_time= 0..16301] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Short Segment Length flag (Type is String)
- description: The Short Segment Length flag is set based on the length of the short segment. The flag is set as follows: 0 if sseg_length< 50 (meters); 1 if 50 <sseg_length < 150 (meters); 2 if 150 < sseg_length< 300 (meters); 3 if 300 < sseg_length. (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: below_threshold1 below_threshold2 below_threshold3 above_threshold4 (Type is String)
- flag_values: 0, 1, 2, 3 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 3 (Type is Int32)
- origname: qf_sseg_length (Type is String)
- fullnamepath: /gt2l/qf_sseg_length (Type is String)
- coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String)

gt2l_qf_lseg_length[ /gt2l_delta_time= 0..16301] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Long Segment Length flag (Type is String)
- description: The Long Segment Length flag is set based on the length of the long segment. The flag is set as follows: 0 if Lseg_length < 500 (meters); 1 if 50 <= Lseg_length < 1500 (meters); 2 if 150 <= Lseg_length < 3000 (meters); 3 if 3000 <= Lseg_length (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: below_threshold1 below_threshold2 below_threshold3 above_threshold4 (Type is String)
- flag_values: 0, 1, 2, 3 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 3 (Type is Int32)
- origname: qf_lseg_length (Type is String)
- fullnamepath: /gt2l/qf_lseg_length (Type is String)
- coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String)

gt2l_significant_wave_ht[ /gt2l_delta_time= 0..16301] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: meters (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: SWH (Type is String)
- description: Significant wave height (Type is String)
- source: section 5.3.3 (C) (Type is String)
- origname: significant_wave_ht (Type is String)
- fullnamepath: /gt2l/significant_wave_ht (Type is String)
- coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String)

gt2l_qf_bias_em[ /gt2l_delta_time= 0..16301] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: EM Bias Quality Flag (Type is String)
- description: The Electromagnetic Bias flag is set based on threshold checks for the estimated electromagnetic height bias. The flag is set as follows: -3 if H_bias_EM < -0.10 (m); -2 if -0.10 < H_bias_EM < -0.05; -1 if -0.05 <= H_bias_EM < -0.01; 0 if -0.01 <= H_bias_EM < 0.01 (m); 1 if 0.01 <= H_bias_EM < 0.05; 2 if 0.05 <= H_bias_EM < 0.10; 3 if 0.10 < H_bias_EM; 4 if H_bias_EM is invalid. (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 above_threshold6 invalid (Type is String)
- flag_values: -3, -2, -1, 0, 1, 2, 3, 4 (Type is Int32)
- valid_min: -3 (Type is Int32)
- valid_max: 4 (Type is Int32)
- origname: qf_bias_em (Type is String)
- fullnamepath: /gt2l/qf_bias_em (Type is String)
- coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String)

gt2l_segment_id_end[ /gt2l_delta_time= 0..16301] (Type is Int32)

attributes
- units: 1 (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: Last ATL03 Segment ID (Type is String)
- description: Last ATL03 segment_id associated with the photons within this inland water segment. (Type is String)
- source: ATL03 (Type is String)
- origname: segment_id_end (Type is String)
- fullnamepath: /gt2l/segment_id_end (Type is String)
- coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String)

gt2l_stdev_water_surf[ /gt2l_delta_time= 0..16301] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: meters (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: Surface StDev (Type is String)
- description: Standard deviation of water surface, calculated over long segments with result reported at each short segment location tag contained within. (Type is String)
- source: section 5.3.3 (C) (Type is String)
- origname: stdev_water_surf (Type is String)
- fullnamepath: /gt2l/stdev_water_surf (Type is String)
- coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String)

gt2l_qf_iwp[ /gt2l_delta_time= 0..16301] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- contentType: qualityInformation (Type is String)
- long_name: Inland Water Segment Processing Flag (Type is String)
- description: Inland Water segment Processing (IWP) flag to describe the level of processing the inland water algorithm was able to perform on each short segment based on the data available, ranging from 1 to 7. (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: 1_short_segment 2_short_segments 3_to_5_short_segments 6_to_7_short_segments 8_to_9_short_segments 10_to_29_short_segments 30_or_more_short_segments_analyzed (Type is String)
- flag_values: 1, 2, 3, 4, 5, 6, 7 (Type is Int32)
- valid_min: 1 (Type is Int32)
- valid_max: 7 (Type is Int32)
- origname: qf_iwp (Type is String)
- fullnamepath: /gt2l/qf_iwp (Type is String)
- coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String)

gt2l_segment_id_beg[ /gt2l_delta_time= 0..16301] (Type is Int32)

attributes
- units: 1 (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: First ATL03 Segment ID (Type is String)
- description: First ATL03 segment_id associated with the photons within this inland water segment. (Type is String)
- source: ATL03 (Type is String)
- origname: segment_id_beg (Type is String)
- fullnamepath: /gt2l/segment_id_beg (Type is String)
- coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String)

gt2l_cycle[ /gt2l_delta_time= 0..16301] (Type is Int8)

attributes
- units: counts (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: Cycle Number (Type is String)
- description: Tracks the number of 91-day cycles in the mission, beginning with 01. (Type is String)
- source: ATL03 (Type is String)
- valid_min: 0 (Type is Int8)
- valid_max: 50 (Type is Int8)
- origname: cycle (Type is String)
- fullnamepath: /gt2l/cycle (Type is String)
- coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String)

gt2l_qf_subsurf_anomaly[ /gt2l_delta_time= 0..16301] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Subsurface Anomaly Quality Flag (Type is String)
- description: The subsurface anomaly flag is defined as in atbd section 4.5.5.5 above. It is computed for each bin between 6 Stdev below the mean of the integrated model to 20m depth. The anomaly is set to 0 when bin value +<+3* subsurface mean plus s~sub~subsurface and set to 1 when subsurface bin value is other (meaning an anomaly exists) (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: unlikely_subsurface likely_subsurface (Type is String)
- flag_values: 0, 1 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 1 (Type is Int32)
- origname: qf_subsurf_anomaly (Type is String)
- fullnamepath: /gt2l/qf_subsurf_anomaly (Type is String)
- coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String)

gt2l_subsurface_attenuation[ /gt2l_delta_time= 0..16301] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: 1 (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Subsurface Attenuation (Type is String)
- description: Subsurface attenuation coefficient. (Type is String)
- source: section 5.3.4 (A) (Type is String)
- origname: subsurface_attenuation (Type is String)
- fullnamepath: /gt2l/subsurface_attenuation (Type is String)
- coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String)

gt2l_inland_water_body_region[ /gt2l_delta_time= 0..16301] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: Body Region (Type is String)
- description: ATL13-created shapefile representing relevant bodies of water over which to implement the ATL13 water surface finding algorithm only within a region of processing interest. (Type is String)
- source: section 5.3.1 (A) (Type is String)
- origname: inland_water_body_region (Type is String)
- fullnamepath: /gt2l/inland_water_body_region (Type is String)
- coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String)

gt2l_ice_flag[ /gt2l_delta_time= 0..16301] (Type is Int8)

attributes
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Ice Flag (Type is String)
- description: Flag indicating significant existence of ice on the water surface (Type is String)
- source: section 5.3.2 (D) (Type is String)
- flag_meanings: no_ice ice (Type is String)
- flag_values: 0, 1 (Type is Int8)
- valid_min: 0 (Type is Int8)
- valid_max: 1 (Type is Int8)
- origname: ice_flag (Type is String)
- fullnamepath: /gt2l/ice_flag (Type is String)
- coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String)

gt2l_segment_lon[ /gt2l_delta_time= 0..16301] (Type is Float64)

attributes
- units: degrees_east (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Longitude (Type is String)
- standard_name: longitude (Type is String)
- description: Longitude of reporting location (Type is String)
- source: section 5.3.5 (A) (Type is String)
- valid_min: -180.00000000000000 (Type is Float64)
- valid_max: 180.00000000000000 (Type is Float64)
- origname: segment_lon (Type is String)
- fullnamepath: /gt2l/segment_lon (Type is String)
- coordinates: gt2l_delta_time gt2l_segment_lat (Type is String)

gt2l_ht_ortho[ /gt2l_delta_time= 0..16301] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: meters (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Orthometric Height (Type is String)
- description: Orthometric height converted from ellipsoidal height. (Type is String)
- source: section 5.3.5 (A) (Type is String)
- origname: ht_ortho (Type is String)
- fullnamepath: /gt2l/ht_ortho (Type is String)
- coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String)

gt2l_segment_lat[ /gt2l_delta_time= 0..16301] (Type is Float64)

attributes
- units: degrees_north (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Latitude (Type is String)
- standard_name: latitude (Type is String)
- description: Latitude of reporting location (Type is String)
- source: section 5.3.5 (A) (Type is String)
- valid_min: -90.000000000000000 (Type is Float64)
- valid_max: 90.000000000000000 (Type is Float64)
- origname: segment_lat (Type is String)
- fullnamepath: /gt2l/segment_lat (Type is String)
- coordinates: gt2l_delta_time gt2l_segment_lon (Type is String)

gt2l_ht_water_surf[ /gt2l_delta_time= 0..16301] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: meters (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Water Surface Height (Type is String)
- description: Water surface height with reference to WGS84 ellipsoid (Type is String)
- source: section 5.3.5 (A) (Type is String)
- origname: ht_water_surf (Type is String)
- fullnamepath: /gt2l/ht_water_surf (Type is String)
- coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String)

gt2l_err_ht_water_surf[ /gt2l_delta_time= 0..16301] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Height Error (Type is String)
- description: Error included in heights reported in ht_water_surf. (Type is String)
- source: section 5.3.3 (C) (Type is String)
- origname: err_ht_water_surf (Type is String)
- fullnamepath: /gt2l/err_ht_water_surf (Type is String)
- coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String)

gt2l_atl13refid[ /gt2l_delta_time= 0..16301] (Type is Int64)

attributes
- _FillValue: 0 (Type is Int64)
- units: 1 (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: ATL13 Reference ID (Type is String)
- description: Unique aggregate reference number for each shape in the ATL13 Inland Water Body Mask, where digit 1 = type, digit 2 = size, digit 3 = source, and digits 4-10 = shape id (Type is String)
- source: ATL13 ATBD, Section 5.3.1 (C) (Type is String)
- origname: atl13refid (Type is String)
- fullnamepath: /gt2l/atl13refid (Type is String)
- coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String)

gt2l_qf_cloud[ /gt2l_delta_time= 0..16301] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Consolidated cloud flag (Type is String)
- description: This flag is a combination of multiple flags (cloud_flag_atm, cloud_flag_asr, and bsnow_con) and takes daytime/nighttime into consideration. A value of 1 means clouds or blowing snow are likely present. A value of 0 indicates the likely absence of clouds or blowing snow. From the ATL09 data closest to the segment time. (Type is String)
- source: ATL09 (Type is String)
- flag_meanings: likely_clear likely_cloudy (Type is String)
- flag_values: 0, 1 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 1 (Type is Int32)
- origname: qf_cloud (Type is String)
- fullnamepath: /gt2l/qf_cloud (Type is String)
- coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String)

gt2l_inland_water_body_source[ /gt2l_delta_time= 0..16301] (Type is Int8)

attributes
- _FillValue: 127 (Type is Int8)
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Body Source (Type is String)
- description: Source of Inland Water Body shape, where 1=HydroLAKES, 2=Global Lakes and Wetlands Database, 3=Named Marine Water Bodies, 4=GSHHG Shoreline, 5=Reserved, 6=Reserved, 7=Reserved, 8=Reserved, 9=Reserved (Type is String)
- source: ATL13 ATBD, Section 5.3.1 (C) (Type is String)
- flag_meanings: HydroLAKES Global_Lakes_and_Wetlands_Database Named_Marine_Water_Bodies GSHHG_Shoreline Reserved Reserved Reserved Reserved Reserved (Type is String)
- flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 (Type is Int8)
- valid_min: 1 (Type is Int8)
- valid_max: 9 (Type is Int8)
- origname: inland_water_body_source (Type is String)
- fullnamepath: /gt2l/inland_water_body_source (Type is String)
- coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String)

gt2l_inland_water_body_size[ /gt2l_delta_time= 0..16301] (Type is Int8)

attributes
- _FillValue: 127 (Type is Int8)
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Body Size (Type is String)
- description: Size of Inland Water Body, A=area, where 1=A>10,000 km2, 2=10,000>A>=1,000, 3=1,000>A>=100, 4=100>A>=10, 5=10>A>=1, 6=1>A>=0.1, 7=0.01>A, 8=Reserved, 9=Reserved (Type is String)
- source: ATL13 ATBD, Section 5.3.1 (C) (Type is String)
- flag_meanings: A>10000 10000>A>=1000 1000>A>=100 100>A>=10 10>A>=1 1>A>=0.1 0.01>A Reserved Reserved (Type is String)
- flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 (Type is Int8)
- valid_min: 1 (Type is Int8)
- valid_max: 9 (Type is Int8)
- origname: inland_water_body_size (Type is String)
- fullnamepath: /gt2l/inland_water_body_size (Type is String)
- coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String)

gt2l_err_slope_trk[ /gt2l_delta_time= 0..16301] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Slope Error (Type is String)
- description: Error included in segment_slope_trk_local. (Type is String)
- source: section 5.3.3 (C) (Type is String)
- origname: err_slope_trk (Type is String)
- fullnamepath: /gt2l/err_slope_trk (Type is String)
- coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String)

gt2l_segment_slope_trk_bdy[ /gt2l_delta_time= 0..16301] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: 1 (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Water Body Slope (Type is String)
- description: Along track water body surface slope. (Type is String)
- source: section 5.3.5 (A) (Type is String)
- origname: segment_slope_trk_bdy (Type is String)
- fullnamepath: /gt2l/segment_slope_trk_bdy (Type is String)
- coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String)

gt2l_sseg_mean_lat[ /gt2l_delta_time= 0..16301] (Type is Float64)

attributes
- _FillValue: 1.7976931348623157e+308 (Type is Float64)
- units: degrees_north (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Short Segment Mean Latitude (Type is String)
- description: Mean latitude of the signal-qualified photons in a short segment. (Type is String)
- source: Inland Water ATBD (Type is String)
- valid_min: -90.000000000000000 (Type is Float64)
- valid_max: 90.000000000000000 (Type is Float64)
- origname: sseg_mean_lat (Type is String)
- fullnamepath: /gt2l/sseg_mean_lat (Type is String)
- coordinates: gt2l_delta_time (Type is String)

gt2l_qf_spec_width[ /gt2l_delta_time= 0..16301] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Spectral Width Flag (Type is String)
- description: The Spectral Width flag is set based on threshold checks for the estimated Spectral Width. The flag is set as follows: 0 if spec_width < 0.5; 1 if spec_width >= +0.5. (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: below_0.5 above_0.5 (Type is String)
- flag_values: 0, 1 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 1 (Type is Int32)
- origname: qf_spec_width (Type is String)
- fullnamepath: /gt2l/qf_spec_width (Type is String)
- coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String)

gt2l_qf_bckgrd[ /gt2l_delta_time= 0..16301] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Background Quality Flag (Type is String)
- description: Describes the degree of background photons present in each short segment. bckgrd_dnsty_threshold1= 0.001 (counts per bi per Lseg); bckgrd_dnsty_threshold2= 0.01 (counts per bin per Lseg); bckgrd_dnsty_threshold3= 0.05 (counts per bin per Lseg); bckgrd_dnsty_threshold4= 0.1 (counts per bin per Lseg); bckgrd_dnsty_threshold5= 0.3 (counts per bin per Lseg); bckgrd_dnsty_threshold6= 0.5 (counts per bin per Lseg) (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: equal_to_or_below_threshold1 equal_to_or_below_threshold2 equal_to_or_below_threshold3 equal_to_or_below_threshold4 equal_to_or_below_threshold5 equal_to_or_below_threshold6 above_threshold6 (Type is String)
- flag_values: 0, 1, 2, 3, 4, 5, 6 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 6 (Type is Int32)
- origname: qf_bckgrd (Type is String)
- fullnamepath: /gt2l/qf_bckgrd (Type is String)
- coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String)

gt2l_sseg_mean_time[ /gt2l_delta_time= 0..16301] (Type is Float64)

attributes
- contentType: auxiliaryInformation (Type is String)
- long_name: Short Segment Mean Time (Type is String)
- description: Mean time of the signal-qualified photons in a short segment. (Type is String)
- source: Inland Water ATBD (Type is String)
- _FillValue: 1.7976931348623157e+308 (Type is Float64)
- units: Seconds since 2018-01-01 (Type is String)
- origname: sseg_mean_time (Type is String)
- fullnamepath: /gt2l/sseg_mean_time (Type is String)
- coordinates: gt2l_delta_time (Type is String)

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

attributes
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Release Number (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 is String)
- source: Operations (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
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Ending Geolocation Segment (Type is String)
- description: The ending geolocation segment number associated with the data contained within this granule. ICESat 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 is String)
- source: Derived (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
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Version (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 is String)
- source: Operations (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
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Ending Region (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 is String)
- source: Derived (Type is String)
- origname: end_region (Type is String)
- fullnamepath: /ancillary_data/end_region (Type is String)

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

attributes
- units: seconds since 1980-01-06T00:00:00.000000Z (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: ATLAS Epoch Offset (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 is String)
- source: Operations (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
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Ending Reference Groundtrack (Type is String)
- description: The ending reference groundtrack (RGT) number associated with the data contained within this granule. There are 1387 reference groundtrack in the ICESat-2 repeat orbit. The reference groundtrack 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 is String)
- source: Derived (Type is String)
- valid_min: 1 (Type is Int32)
- valid_max: 1387 (Type is Int32)
- 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
- units: seconds since 2018-01-01 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: ATLAS End Time (Actual) (Type is String)
- standard_name: time (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 is String)
- source: Derived (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
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Ending Orbit Number (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 is String)
- source: Derived (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
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Starting Cycle (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 is String)
- source: Derived (Type is String)
- valid_min: 0 (Type is Int32)
- valid_max: 99 (Type is Int32)
- 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
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: End UTC Time of Granule (CCSDS-A, Actual) (Type is String)
- description: UTC (in CCSDS-A format) of the last data point within the granule. (Type is String)
- source: Derived (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
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Control File (Type is String)
- description: PGE-specific control file used to generate this granule. To re-use, replace breaks (BR) with linefeeds. (Type is String)
- source: Operations (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
- units: seconds (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Start GPS SOW of Granule (Actual) (Type is String)
- description: GPS seconds-of-week of the first data point in the granule. (Type is String)
- source: Derived (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
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: End UTC Time of Granule (CCSDS-A, Requested) (Type is String)
- description: Requested end time (in UTC CCSDS-A) of this granule. (Type is String)
- source: Derived (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
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Ending Cycle (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 is String)
- source: Derived (Type is String)
- valid_min: 0 (Type is Int32)
- valid_max: 99 (Type is Int32)
- 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
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Start UTC Time of Granule (CCSDS-A, Requested) (Type is String)
- description: Requested start time (in UTC CCSDS-A) of this granule. (Type is String)
- source: Derived (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
- units: seconds since 2018-01-01 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: ATLAS Start Time (Actual) (Type is String)
- standard_name: time (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 is String)
- source: Derived (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
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Starting Geolocation Segment (Type is String)
- description: The starting geolocation segment number associated with the data contained within this granule. ICESat 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 is String)
- source: Derived (Type is String)
- origname: start_geoseg (Type is String)
- fullnamepath: /ancillary_data/start_geoseg (Type is String)

ancillary_data_inland_water_atm_window2[ /FakeDim0= 0..0] (Type is Float32)

attributes
- units: meters (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: ATM Background Window Top (Type is String)
- description: Upper limit of height above coarse water surface height for atmospheric background count calculation. (Type is String)
- source: ATBD Table 5-2 (Type is String)
- origname: atm_window2 (Type is String)
- fullnamepath: /ancillary_data/inland_water/atm_window2 (Type is String)

ancillary_data_inland_water_b1_sseg1[ /FakeDim0= 0..0] (Type is Float32)

attributes
- units: meters (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Small Segment Bin Size (Type is String)
- description: Bin size to be used for histogramming of each small segment. (Type is String)
- source: ATBD Table 5-2 (Type is String)
- origname: b1_sseg1 (Type is String)
- fullnamepath: /ancillary_data/inland_water/b1_sseg1 (Type is String)

ancillary_data_inland_water_s_seg1[ /FakeDim0= 0..0] (Type is Int32)

attributes
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Short Segment Length (Type is String)
- description: Short segment size, operationally used as unit length over which to identify water surface height anomalies such as islands, bridges, etc. (Type is String)
- source: ATBD Table 5-2 (Type is String)
- origname: s_seg1 (Type is String)
- fullnamepath: /ancillary_data/inland_water/s_seg1 (Type is String)

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

attributes
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Detrend Width (Type is String)
- description: Number of standard deviations +/- mode to include in detrend band. (Type is String)
- source: ATBD Table 5-2 (Type is String)
- origname: detrend_width (Type is String)
- fullnamepath: /ancillary_data/inland_water/detrend_width (Type is String)

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

attributes
- units: meters (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Subsurf Max Vertical Profile (Type is String)
- description: Maximum vertical profile of water subsurface to include in estimation of subsurface characteristics (Type is String)
- source: ATBD Table 5-2 (Type is String)
- origname: sub_max (Type is String)
- fullnamepath: /ancillary_data/inland_water/sub_max (Type is String)

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

attributes
- units: meters (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Reference Difference (Type is String)
- description: Maximum distance from a water body that a geosegment reference photon indicates the need for overlap testing each individual photon in the geosegment (Type is String)
- source: ATBD Table 5-2 (Type is String)
- origname: ref_dist_iw_bdy (Type is String)
- fullnamepath: /ancillary_data/inland_water/ref_dist_iw_bdy (Type is String)

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

attributes
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Short Segment Mode Frequency Test (Type is String)
- description: Threshold to test number of short segment histogram modes against for inclusion or exclusion of short segment. (Type is String)
- source: ATBD Table 5-2 (Type is String)
- origname: sseg_mode_freq_test (Type is String)
- fullnamepath: /ancillary_data/inland_water/sseg_mode_freq_test (Type is String)

ancillary_data_inland_water_type_to_process[ /FakeDim1= 0..8] (Type is Int8)

attributes
- _FillValue: 127 (Type is Int8)
- units: 1 (Type is String)
- long_name: Type to Process (Type is String)
- description: Water body types that are to be processed by the ATL13 algorithm. This parameter is a rank 1 array of extent 9, with the body type digits coinciding with the array subscripts 1 through 9. Array elements are binary values, if 0 then process body type, 1 otherwise. Water body types are described in ATL13 chapter 4.7.1.2 and in Table 5-4. (Type is String)
- source: ATL13 ATBD, Section 4.7.1.2, Table 5-4 (Type is String)
- flag_meanings: process_type otherwise (Type is String)
- flag_values: 0, 1 (Type is Int8)
- valid_min: 0 (Type is Int8)
- valid_max: 1 (Type is Int8)
- contentType: auxiliaryInformation (Type is String)
- origname: type_to_process (Type is String)
- fullnamepath: /ancillary_data/inland_water/type_to_process (Type is String)

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

attributes
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Signal Confidence Threshold (Type is String)
- description: Minimum signal confidence required for photon to be included in analysis (Type is String)
- source: ATBD Table 5-2 (Type is String)
- origname: sig_threshold (Type is String)
- fullnamepath: /ancillary_data/inland_water/sig_threshold (Type is String)

ancillary_data_inland_water_size_to_process[ /FakeDim1= 0..8] [ /FakeDim3= 0..8] (Type is Int8)

attributes
- _FillValue: 127 (Type is Int8)
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Size to Process (Type is String)
- description: Water body sizes that are to be processed by the ATL13 algorithm for each water body type. This parameter is a rank 2 array of size 9x9, where array subscripts 1 through 9, coincide with body type digits along columns, and body size digits along rows. Array elements are binary values, if 0 then process body size for that type, 1 otherwise. Water body sizes are described in ATL13 chapter 4.7.1.2 and in Table 5-4. (Type is String)
- source: ATL13 ATBD, Section 4.7.1.2, Table 5-4 (Type is String)
- flag_meanings: process_size otherwise (Type is String)
- flag_values: 0, 1 (Type is Int8)
- valid_min: 0 (Type is Int8)
- valid_max: 1 (Type is Int8)
- origname: size_to_process (Type is String)
- fullnamepath: /ancillary_data/inland_water/size_to_process (Type is String)

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

attributes
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Gaussian Peak Threshold (Type is String)
- description: Fraction of the peak amplitude above which Gaussian fit error analysis is executed (ie, calculate error on Gaussian only between the peak amplitude and gauss_pk_thres * peak) (Type is String)
- source: ATBD Table 5-2 (Type is String)
- origname: gauss_pk_thres (Type is String)
- fullnamepath: /ancillary_data/inland_water/gauss_pk_thres (Type is String)

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

attributes
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Short Segment Mode Count Test (Type is String)
- description: Threshold to test number of values contained in short segment histogram multimodes against for inclusion or exclusion of short segment (Type is String)
- source: ATBD Table 5-2 (Type is String)
- origname: sseg_mode_cnt_test (Type is String)
- fullnamepath: /ancillary_data/inland_water/sseg_mode_cnt_test (Type is String)

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

attributes
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Shore Buffer (Type is String)
- description: Number of near-shore short segments to ignore in analysis due to near-shore influences. (Type is String)
- source: ATBD Table 5-2 (Type is String)
- origname: shore_buffer (Type is String)
- fullnamepath: /ancillary_data/inland_water/shore_buffer (Type is String)

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

attributes
- units: meters (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Num Depth Bins C (Type is String)
- description: Number of bins over which to calculate moving average (Type is String)
- source: ATBD Table 5-2 (Type is String)
- origname: h_mavg_c (Type is String)
- fullnamepath: /ancillary_data/inland_water/h_mavg_c (Type is String)

ancillary_data_inland_water_bckgrd_threshold[ /FakeDim4= 0..1] (Type is Float32)

attributes
- units: counts/sec (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Background Threshold (Type is String)
- description: Thresholds outside of which computed background is flagged (High, Low). (Type is String)
- source: ATBD Table 5-2 (Type is String)
- origname: bckgrd_threshold (Type is String)
- fullnamepath: /ancillary_data/inland_water/bckgrd_threshold (Type is String)

ancillary_data_inland_water_f2_d_min[ /FakeDim0= 0..0] (Type is Float32)

attributes
- units: meters (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Minimum Distance Thres (Type is String)
- description: Minimum distance threshold between photons required for inclusion in algorithm. (Type is String)
- source: ATBD Table 5-2 (Type is String)
- origname: f2_d_min (Type is String)
- fullnamepath: /ancillary_data/inland_water/f2_d_min (Type is String)

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

attributes
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Max Geoseg Search Radius (Type is String)
- description: Maximum number of geosegments in either direction to search for reported water surface heights (Type is String)
- source: ATBD Table 5-2 (Type is String)
- origname: max_gseg_search (Type is String)
- fullnamepath: /ancillary_data/inland_water/max_gseg_search (Type is String)

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

attributes
- units: meters (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Short Segment Length Test (Type is String)
- description: Threshold by which to test the length of a short segment to determine if it is anomalous or not anomalous. (Type is String)
- source: ATBD Table 5-2 (Type is String)
- origname: sseg_length_test (Type is String)
- fullnamepath: /ancillary_data/inland_water/sseg_length_test (Type is String)

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

attributes
- units: meters (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Num Depth Bins A (Type is String)
- description: Number of depth bins over which to compute H_mavg_a (Type is String)
- source: ATBD Table 5-2 (Type is String)
- origname: h_mavg_a (Type is String)
- fullnamepath: /ancillary_data/inland_water/h_mavg_a (Type is String)

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

attributes
- units: meters (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Signal Window Bottom (Type is String)
- description: Lower limit below coarse water surface to include photons for analysis. (Type is String)
- source: ATBD Table 5-2 (Type is String)
- origname: signal_window_bottom (Type is String)
- fullnamepath: /ancillary_data/inland_water/signal_window_bottom (Type is String)

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

attributes
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Fresnel Coeff (Type is String)
- description: Fresnel specular reflection coefficient @ 532 nm (Type is String)
- source: ATBD Table 5-2 (Type is String)
- origname: c_fresnel (Type is String)
- fullnamepath: /ancillary_data/inland_water/c_fresnel (Type is String)

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

attributes
- units: meters (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Short Segment Mode Spread Test (Type is String)
- description: Threshold to test distance between short segment histogram multimodes against for inclusion or exclusion of short segment. (Type is String)
- source: ATBD Table 5-2 (Type is String)
- origname: sseg_mode_spread_test (Type is String)
- fullnamepath: /ancillary_data/inland_water/sseg_mode_spread_test (Type is String)

ancillary_data_inland_water_anmly_test[ /FakeDim5= 0..3] (Type is Float32)

attributes
- units: meters (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Anomaly Test (Type is String)
- description: Array containing threshold values against which to test segments for anomalous changes in height. The mode of each segment histogram will be tested against ht_water_coarse and excluded if the difference is greater than the value associated with the segment (Type is String)
- source: ATBD Table 5-2 (Type is String)
- origname: anmly_test (Type is String)
- fullnamepath: /ancillary_data/inland_water/anmly_test (Type is String)

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

attributes
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- description: Adjustment for the speed of light through water (cl) (Type is String)
- source: ATBD Table 5-2 (Type is String)
- long_name: C Adjustment (Type is String)
- origname: c_adj (Type is String)
- fullnamepath: /ancillary_data/inland_water/c_adj (Type is String)

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

attributes
- units: meters (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Num Depth Bins B (Type is String)
- description: Number of depth bins over which to compute H_mavg_b (Type is String)
- source: ATBD Table 5-2 (Type is String)
- origname: h_mavg_b (Type is String)
- fullnamepath: /ancillary_data/inland_water/h_mavg_b (Type is String)

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

attributes
- units: meters (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Long Bin Size (Type is String)
- description: Bin size to be used by which to establish a histogram of long segments. (Type is String)
- source: ATBD Table 5-2 (Type is String)
- origname: b_long (Type is String)
- fullnamepath: /ancillary_data/inland_water/b_long (Type is String)

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

attributes
- units: meters (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Detrend Bin Size (Type is String)
- description: Bin size used to establish a band of heights over which to determine the detrending equation. (Type is String)
- source: ATBD Table 5-2 (Type is String)
- origname: bin_detrend (Type is String)
- fullnamepath: /ancillary_data/inland_water/bin_detrend (Type is String)

ancillary_data_inland_water_atm_window1[ /FakeDim0= 0..0] (Type is Float32)

attributes
- units: meters (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: ATM Background Window Bottom (Type is String)
- description: Lower limit of height above coarse water surface height for atmospheric background count calculation. (Type is String)
- source: ATBD Table 5-2 (Type is String)
- origname: atm_window1 (Type is String)
- fullnamepath: /ancillary_data/inland_water/atm_window1 (Type is String)

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

attributes
- units: meters (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Num Depth Bins D (Type is String)
- description: Number of depth bins over which to compute P_ht_long_subsurf_mavg (Type is String)
- source: ATBD Table 5-2 (Type is String)
- origname: m_avg_d (Type is String)
- fullnamepath: /ancillary_data/inland_water/m_avg_d (Type is String)

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

attributes
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Long Surface Segment Size (Type is String)
- description: Long segment size, operationally used as unit length over which to detrend the water surface, characterize the surface, and deconvolve the instrument pulse and subsurface effects from the water surface response. (Type is String)
- source: ATBD Table 5-2 (Type is String)
- origname: l_surf (Type is String)
- fullnamepath: /ancillary_data/inland_water/l_surf (Type is String)

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

attributes
- units: meters (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Signal Window Top (Type is String)
- description: Upper limit above coarse water surface to include photons for analysis. (Type is String)
- source: ATBD Table 5-2 (Type is String)
- origname: signal_window_top (Type is String)
- fullnamepath: /ancillary_data/inland_water/signal_window_top (Type is String)

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

attributes
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: LSBR Threshold (Type is String)
- description: Threshold at which the LSBR indicates a significant transition from signal photon richness to noise. (Type is String)
- source: ATBD Table 5-2 (Type is String)
- origname: lsbr_threshold (Type is String)
- fullnamepath: /ancillary_data/inland_water/lsbr_threshold (Type is String)

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

attributes
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Long Subsurface Segment Size (Type is String)
- description: Long segment size, operationally used as unit length over which to characterize the subsurface, and deconvolve the instrument pulse and subsurface effects from the water surface response. (Type is String)
- source: ATBD Table 5-2 (Type is String)
- origname: l_sub (Type is String)
- fullnamepath: /ancillary_data/inland_water/l_sub (Type is String)

ancillary_data_inland_water_b2_sseg1[ /FakeDim0= 0..0] (Type is Float32)

attributes
- units: meters (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Small Segment Height Bin Size (Type is String)
- description: Bin size to be used for histogramming of small segment heights. (Type is String)
- source: ATBD Table 5-2 (Type is String)
- origname: b2_sseg1 (Type is String)
- fullnamepath: /ancillary_data/inland_water/b2_sseg1 (Type is String)

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

attributes
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Starting Orbit Number (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 is String)
- source: Derived (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
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Start UTC Time of Granule (CCSDS-A, Actual) (Type is String)
- description: UTC (in CCSDS-A format) of the first data point within the granule. (Type is String)
- source: Derived (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
- units: weeks from 1980-01-06 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Ending GPSWeek of Granule (Actual) (Type is String)
- description: GPS week number of the last data point in the granule. (Type is String)
- source: Derived (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
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Starting Reference Groundtrack (Type is String)
- description: The starting reference groundtrack (RGT) number associated with the data contained within this granule. There are 1387 reference groundtrack in the ICESat-2 repeat orbit. The reference groundtrack 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 is String)
- source: Derived (Type is String)
- valid_min: 1 (Type is Int32)
- valid_max: 1387 (Type is Int32)
- 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
- units: seconds (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Ending GPS SOW of Granule (Actual) (Type is String)
- description: GPS seconds-of-week of the last data point in the granule. (Type is String)
- source: Derived (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
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Starting Region (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 is String)
- source: Derived (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
- units: weeks from 1980-01-06 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Start GPSWeek of Granule (Actual) (Type is String)
- description: GPS week number of the first data point in the granule. (Type is String)
- source: Derived (Type is String)
- origname: start_gpsweek (Type is String)
- fullnamepath: /ancillary_data/start_gpsweek (Type is String)

gt3r_rgt[ /gt3r_delta_time= 0..5058] (Type is Int16)

attributes
- units: 1 (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: Reference Ground track (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 is String)
- source: ATL03 (Type is String)
- valid_min: 1 (Type is Int16)
- valid_max: 1387 (Type is Int16)
- origname: rgt (Type is String)
- fullnamepath: /gt3r/rgt (Type is String)
- coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String)

gt3r_qf_bias_fit[ /gt3r_delta_time= 0..5058] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Height Bias Fit Quality Flag (Type is String)
- description: The height bias fit flag is set based on the value of the goodness of fit bias estimated as the difference between the centroid elevations of the observed surface water histogram and fitted integrated water surface model histogram. The flag values are set as follows: = -3 if H_bias_fit < -0.10 (m); -2 if -0.10 <= H_bias_fit < -0.05;-1 when -0.05 <= H_bias_fit < -0.01; 0 if -0.01 <= H_bias_fit < 0.01 (m); 1 if 0.01 <= H_bias_fit < 0.05; 2 if 0.05 < H_bias_fit < 0.10; 3 if 0.10 <= H_bias_fit; 4 if H_bias_fit is invalid. (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 equal_to_or_above_threshold6 invalid (Type is String)
- flag_values: -3, -2, -1, 0, 1, 2, 3, 4 (Type is Int32)
- valid_min: -3 (Type is Int32)
- valid_max: 4 (Type is Int32)
- origname: qf_bias_fit (Type is String)
- fullnamepath: /gt3r/qf_bias_fit (Type is String)
- coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String)

gt3r_sseg_mean_lon[ /gt3r_delta_time= 0..5058] (Type is Float64)

attributes
- units: degrees_east (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Short Segment Mean Longitude (Type is String)
- description: Mean longitude of the signal-qualified photons in a short segment. (Type is String)
- source: Inland Water ATBD (Type is String)
- valid_min: -180.00000000000000 (Type is Float64)
- valid_max: 180.00000000000000 (Type is Float64)
- origname: sseg_mean_lon (Type is String)
- fullnamepath: /gt3r/sseg_mean_lon (Type is String)
- coordinates: gt3r_delta_time (Type is String)

gt3r_qf_ice[ /gt3r_delta_time= 0..5058] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Ice Quality Flag (Type is String)
- description: The quality flag for ice describes the likelihood of ice on the short water body surface segment. 0 for QF_Bckgrd<= 2; 1 for 2 < QF_Bckgrd<= 4; 2 for 4 < QF_Bckgrd; 3 for (4 < QF_Bckgrd and QF_Cloud=1) (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: qf_bckgrd_le_2 qf_bckgrd_le_4 qf_bckgrd_gt_4 qf_bckgrd_w_cloud (Type is String)
- flag_values: 0, 1, 2, 3 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 3 (Type is Int32)
- origname: qf_ice (Type is String)
- fullnamepath: /gt3r/qf_ice (Type is String)
- coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String)

gt3r_inland_water_body_type[ /gt3r_delta_time= 0..5058] (Type is Int8)

attributes
- _FillValue: 127 (Type is Int8)
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Body Type (Type is String)
- description: Type of Inland Water Body, where 1=Lake, 2=Known Reservoir, 3=(Reserved for future use), 4=Ephemeral Water, 5=River, 6=Estuary or Bay, 7=Coastal Water, 8=Reserved, 9=Reserved (Type is String)
- source: ATL13 ATBD, Section 5.3.1 (C) (Type is String)
- flag_meanings: Lake Known_Reservoir Reserved_for_future_use Ephemeral_Water River Estuary_or_Bay Coastal_Water Reserved Reserved (Type is String)
- flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 (Type is Int8)
- valid_min: 1 (Type is Int8)
- valid_max: 9 (Type is Int8)
- origname: inland_water_body_type (Type is String)
- fullnamepath: /gt3r/inland_water_body_type (Type is String)
- coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String)

gt3r_inland_water_body_id[ /gt3r_delta_time= 0..5058] (Type is Int32)

attributes
- contentType: referenceInformation (Type is String)
- long_name: Body ID (Type is String)
- description: Identifying signature of an individual inland water body. Each body of water is represented by a unique numeric value. (Type is String)
- source: ATL13 ATBD, Section 5.3.1 (C) (Type is String)
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- origname: inland_water_body_id (Type is String)
- fullnamepath: /gt3r/inland_water_body_id (Type is String)
- coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String)

gt3r_segment_geoid[ /gt3r_delta_time= 0..5058] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: meters (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Segment Geoid (Type is String)
- description: Applicable geoid value at reporting location for all short segment statistics. (Type is String)
- source: ATL03 (Type is String)
- origname: segment_geoid (Type is String)
- fullnamepath: /gt3r/segment_geoid (Type is String)
- coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String)

gt3r_qf_sseg_length[ /gt3r_delta_time= 0..5058] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Short Segment Length flag (Type is String)
- description: The Short Segment Length flag is set based on the length of the short segment. The flag is set as follows: 0 if sseg_length< 50 (meters); 1 if 50 <sseg_length < 150 (meters); 2 if 150 < sseg_length< 300 (meters); 3 if 300 < sseg_length. (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: below_threshold1 below_threshold2 below_threshold3 above_threshold4 (Type is String)
- flag_values: 0, 1, 2, 3 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 3 (Type is Int32)
- origname: qf_sseg_length (Type is String)
- fullnamepath: /gt3r/qf_sseg_length (Type is String)
- coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String)

gt3r_qf_lseg_length[ /gt3r_delta_time= 0..5058] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Long Segment Length flag (Type is String)
- description: The Long Segment Length flag is set based on the length of the long segment. The flag is set as follows: 0 if Lseg_length < 500 (meters); 1 if 50 <= Lseg_length < 1500 (meters); 2 if 150 <= Lseg_length < 3000 (meters); 3 if 3000 <= Lseg_length (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: below_threshold1 below_threshold2 below_threshold3 above_threshold4 (Type is String)
- flag_values: 0, 1, 2, 3 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 3 (Type is Int32)
- origname: qf_lseg_length (Type is String)
- fullnamepath: /gt3r/qf_lseg_length (Type is String)
- coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String)

gt3r_significant_wave_ht[ /gt3r_delta_time= 0..5058] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: meters (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: SWH (Type is String)
- description: Significant wave height (Type is String)
- source: section 5.3.3 (C) (Type is String)
- origname: significant_wave_ht (Type is String)
- fullnamepath: /gt3r/significant_wave_ht (Type is String)
- coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String)

gt3r_qf_bias_em[ /gt3r_delta_time= 0..5058] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: EM Bias Quality Flag (Type is String)
- description: The Electromagnetic Bias flag is set based on threshold checks for the estimated electromagnetic height bias. The flag is set as follows: -3 if H_bias_EM < -0.10 (m); -2 if -0.10 < H_bias_EM < -0.05; -1 if -0.05 <= H_bias_EM < -0.01; 0 if -0.01 <= H_bias_EM < 0.01 (m); 1 if 0.01 <= H_bias_EM < 0.05; 2 if 0.05 <= H_bias_EM < 0.10; 3 if 0.10 < H_bias_EM; 4 if H_bias_EM is invalid. (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 above_threshold6 invalid (Type is String)
- flag_values: -3, -2, -1, 0, 1, 2, 3, 4 (Type is Int32)
- valid_min: -3 (Type is Int32)
- valid_max: 4 (Type is Int32)
- origname: qf_bias_em (Type is String)
- fullnamepath: /gt3r/qf_bias_em (Type is String)
- coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String)

gt3r_segment_id_end[ /gt3r_delta_time= 0..5058] (Type is Int32)

attributes
- units: 1 (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: Last ATL03 Segment ID (Type is String)
- description: Last ATL03 segment_id associated with the photons within this inland water segment. (Type is String)
- source: ATL03 (Type is String)
- origname: segment_id_end (Type is String)
- fullnamepath: /gt3r/segment_id_end (Type is String)
- coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String)

gt3r_stdev_water_surf[ /gt3r_delta_time= 0..5058] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: meters (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: Surface StDev (Type is String)
- description: Standard deviation of water surface, calculated over long segments with result reported at each short segment location tag contained within. (Type is String)
- source: section 5.3.3 (C) (Type is String)
- origname: stdev_water_surf (Type is String)
- fullnamepath: /gt3r/stdev_water_surf (Type is String)
- coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String)

gt3r_qf_iwp[ /gt3r_delta_time= 0..5058] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- contentType: qualityInformation (Type is String)
- long_name: Inland Water Segment Processing Flag (Type is String)
- description: Inland Water segment Processing (IWP) flag to describe the level of processing the inland water algorithm was able to perform on each short segment based on the data available, ranging from 1 to 7. (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: 1_short_segment 2_short_segments 3_to_5_short_segments 6_to_7_short_segments 8_to_9_short_segments 10_to_29_short_segments 30_or_more_short_segments_analyzed (Type is String)
- flag_values: 1, 2, 3, 4, 5, 6, 7 (Type is Int32)
- valid_min: 1 (Type is Int32)
- valid_max: 7 (Type is Int32)
- origname: qf_iwp (Type is String)
- fullnamepath: /gt3r/qf_iwp (Type is String)
- coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String)

gt3r_segment_id_beg[ /gt3r_delta_time= 0..5058] (Type is Int32)

attributes
- units: 1 (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: First ATL03 Segment ID (Type is String)
- description: First ATL03 segment_id associated with the photons within this inland water segment. (Type is String)
- source: ATL03 (Type is String)
- origname: segment_id_beg (Type is String)
- fullnamepath: /gt3r/segment_id_beg (Type is String)
- coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String)

gt3r_cycle[ /gt3r_delta_time= 0..5058] (Type is Int8)

attributes
- units: counts (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: Cycle Number (Type is String)
- description: Tracks the number of 91-day cycles in the mission, beginning with 01. (Type is String)
- source: ATL03 (Type is String)
- valid_min: 0 (Type is Int8)
- valid_max: 50 (Type is Int8)
- origname: cycle (Type is String)
- fullnamepath: /gt3r/cycle (Type is String)
- coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String)

gt3r_qf_subsurf_anomaly[ /gt3r_delta_time= 0..5058] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Subsurface Anomaly Quality Flag (Type is String)
- description: The subsurface anomaly flag is defined as in atbd section 4.5.5.5 above. It is computed for each bin between 6 Stdev below the mean of the integrated model to 20m depth. The anomaly is set to 0 when bin value +<+3* subsurface mean plus s~sub~subsurface and set to 1 when subsurface bin value is other (meaning an anomaly exists) (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: unlikely_subsurface likely_subsurface (Type is String)
- flag_values: 0, 1 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 1 (Type is Int32)
- origname: qf_subsurf_anomaly (Type is String)
- fullnamepath: /gt3r/qf_subsurf_anomaly (Type is String)
- coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String)

gt3r_subsurface_attenuation[ /gt3r_delta_time= 0..5058] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: 1 (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Subsurface Attenuation (Type is String)
- description: Subsurface attenuation coefficient. (Type is String)
- source: section 5.3.4 (A) (Type is String)
- origname: subsurface_attenuation (Type is String)
- fullnamepath: /gt3r/subsurface_attenuation (Type is String)
- coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String)

gt3r_inland_water_body_region[ /gt3r_delta_time= 0..5058] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: Body Region (Type is String)
- description: ATL13-created shapefile representing relevant bodies of water over which to implement the ATL13 water surface finding algorithm only within a region of processing interest. (Type is String)
- source: section 5.3.1 (A) (Type is String)
- origname: inland_water_body_region (Type is String)
- fullnamepath: /gt3r/inland_water_body_region (Type is String)
- coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String)

gt3r_ice_flag[ /gt3r_delta_time= 0..5058] (Type is Int8)

attributes
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Ice Flag (Type is String)
- description: Flag indicating significant existence of ice on the water surface (Type is String)
- source: section 5.3.2 (D) (Type is String)
- flag_meanings: no_ice ice (Type is String)
- flag_values: 0, 1 (Type is Int8)
- valid_min: 0 (Type is Int8)
- valid_max: 1 (Type is Int8)
- origname: ice_flag (Type is String)
- fullnamepath: /gt3r/ice_flag (Type is String)
- coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String)

gt3r_segment_lon[ /gt3r_delta_time= 0..5058] (Type is Float64)

attributes
- units: degrees_east (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Longitude (Type is String)
- standard_name: longitude (Type is String)
- description: Longitude of reporting location (Type is String)
- source: section 5.3.5 (A) (Type is String)
- valid_min: -180.00000000000000 (Type is Float64)
- valid_max: 180.00000000000000 (Type is Float64)
- origname: segment_lon (Type is String)
- fullnamepath: /gt3r/segment_lon (Type is String)
- coordinates: gt3r_delta_time gt3r_segment_lat (Type is String)

gt3r_ht_ortho[ /gt3r_delta_time= 0..5058] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: meters (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Orthometric Height (Type is String)
- description: Orthometric height converted from ellipsoidal height. (Type is String)
- source: section 5.3.5 (A) (Type is String)
- origname: ht_ortho (Type is String)
- fullnamepath: /gt3r/ht_ortho (Type is String)
- coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String)

gt3r_segment_lat[ /gt3r_delta_time= 0..5058] (Type is Float64)

attributes
- units: degrees_north (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Latitude (Type is String)
- standard_name: latitude (Type is String)
- description: Latitude of reporting location (Type is String)
- source: section 5.3.5 (A) (Type is String)
- valid_min: -90.000000000000000 (Type is Float64)
- valid_max: 90.000000000000000 (Type is Float64)
- origname: segment_lat (Type is String)
- fullnamepath: /gt3r/segment_lat (Type is String)
- coordinates: gt3r_delta_time gt3r_segment_lon (Type is String)

gt3r_ht_water_surf[ /gt3r_delta_time= 0..5058] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: meters (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Water Surface Height (Type is String)
- description: Water surface height with reference to WGS84 ellipsoid (Type is String)
- source: section 5.3.5 (A) (Type is String)
- origname: ht_water_surf (Type is String)
- fullnamepath: /gt3r/ht_water_surf (Type is String)
- coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String)

gt3r_err_ht_water_surf[ /gt3r_delta_time= 0..5058] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Height Error (Type is String)
- description: Error included in heights reported in ht_water_surf. (Type is String)
- source: section 5.3.3 (C) (Type is String)
- origname: err_ht_water_surf (Type is String)
- fullnamepath: /gt3r/err_ht_water_surf (Type is String)
- coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String)

gt3r_atl13refid[ /gt3r_delta_time= 0..5058] (Type is Int64)

attributes
- _FillValue: 0 (Type is Int64)
- units: 1 (Type is String)
- contentType: referenceInformation (Type is String)
- long_name: ATL13 Reference ID (Type is String)
- description: Unique aggregate reference number for each shape in the ATL13 Inland Water Body Mask, where digit 1 = type, digit 2 = size, digit 3 = source, and digits 4-10 = shape id (Type is String)
- source: ATL13 ATBD, Section 5.3.1 (C) (Type is String)
- origname: atl13refid (Type is String)
- fullnamepath: /gt3r/atl13refid (Type is String)
- coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String)

gt3r_qf_cloud[ /gt3r_delta_time= 0..5058] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Consolidated cloud flag (Type is String)
- description: This flag is a combination of multiple flags (cloud_flag_atm, cloud_flag_asr, and bsnow_con) and takes daytime/nighttime into consideration. A value of 1 means clouds or blowing snow are likely present. A value of 0 indicates the likely absence of clouds or blowing snow. From the ATL09 data closest to the segment time. (Type is String)
- source: ATL09 (Type is String)
- flag_meanings: likely_clear likely_cloudy (Type is String)
- flag_values: 0, 1 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 1 (Type is Int32)
- origname: qf_cloud (Type is String)
- fullnamepath: /gt3r/qf_cloud (Type is String)
- coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String)

gt3r_inland_water_body_source[ /gt3r_delta_time= 0..5058] (Type is Int8)

attributes
- _FillValue: 127 (Type is Int8)
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Body Source (Type is String)
- description: Source of Inland Water Body shape, where 1=HydroLAKES, 2=Global Lakes and Wetlands Database, 3=Named Marine Water Bodies, 4=GSHHG Shoreline, 5=Reserved, 6=Reserved, 7=Reserved, 8=Reserved, 9=Reserved (Type is String)
- source: ATL13 ATBD, Section 5.3.1 (C) (Type is String)
- flag_meanings: HydroLAKES Global_Lakes_and_Wetlands_Database Named_Marine_Water_Bodies GSHHG_Shoreline Reserved Reserved Reserved Reserved Reserved (Type is String)
- flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 (Type is Int8)
- valid_min: 1 (Type is Int8)
- valid_max: 9 (Type is Int8)
- origname: inland_water_body_source (Type is String)
- fullnamepath: /gt3r/inland_water_body_source (Type is String)
- coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String)

gt3r_inland_water_body_size[ /gt3r_delta_time= 0..5058] (Type is Int8)

attributes
- _FillValue: 127 (Type is Int8)
- units: 1 (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Body Size (Type is String)
- description: Size of Inland Water Body, A=area, where 1=A>10,000 km2, 2=10,000>A>=1,000, 3=1,000>A>=100, 4=100>A>=10, 5=10>A>=1, 6=1>A>=0.1, 7=0.01>A, 8=Reserved, 9=Reserved (Type is String)
- source: ATL13 ATBD, Section 5.3.1 (C) (Type is String)
- flag_meanings: A>10000 10000>A>=1000 1000>A>=100 100>A>=10 10>A>=1 1>A>=0.1 0.01>A Reserved Reserved (Type is String)
- flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 (Type is Int8)
- valid_min: 1 (Type is Int8)
- valid_max: 9 (Type is Int8)
- origname: inland_water_body_size (Type is String)
- fullnamepath: /gt3r/inland_water_body_size (Type is String)
- coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String)

gt3r_err_slope_trk[ /gt3r_delta_time= 0..5058] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Slope Error (Type is String)
- description: Error included in segment_slope_trk_local. (Type is String)
- source: section 5.3.3 (C) (Type is String)
- origname: err_slope_trk (Type is String)
- fullnamepath: /gt3r/err_slope_trk (Type is String)
- coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String)

gt3r_segment_slope_trk_bdy[ /gt3r_delta_time= 0..5058] (Type is Float32)

attributes
- _FillValue: 3.402823466e+38 (Type is Float32)
- units: 1 (Type is String)
- contentType: physicalMeasurement (Type is String)
- long_name: Water Body Slope (Type is String)
- description: Along track water body surface slope. (Type is String)
- source: section 5.3.5 (A) (Type is String)
- origname: segment_slope_trk_bdy (Type is String)
- fullnamepath: /gt3r/segment_slope_trk_bdy (Type is String)
- coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String)

gt3r_sseg_mean_lat[ /gt3r_delta_time= 0..5058] (Type is Float64)

attributes
- _FillValue: 1.7976931348623157e+308 (Type is Float64)
- units: degrees_north (Type is String)
- contentType: auxiliaryInformation (Type is String)
- long_name: Short Segment Mean Latitude (Type is String)
- description: Mean latitude of the signal-qualified photons in a short segment. (Type is String)
- source: Inland Water ATBD (Type is String)
- valid_min: -90.000000000000000 (Type is Float64)
- valid_max: 90.000000000000000 (Type is Float64)
- origname: sseg_mean_lat (Type is String)
- fullnamepath: /gt3r/sseg_mean_lat (Type is String)
- coordinates: gt3r_delta_time (Type is String)

gt3r_qf_spec_width[ /gt3r_delta_time= 0..5058] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Spectral Width Flag (Type is String)
- description: The Spectral Width flag is set based on threshold checks for the estimated Spectral Width. The flag is set as follows: 0 if spec_width < 0.5; 1 if spec_width >= +0.5. (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: below_0.5 above_0.5 (Type is String)
- flag_values: 0, 1 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 1 (Type is Int32)
- origname: qf_spec_width (Type is String)
- fullnamepath: /gt3r/qf_spec_width (Type is String)
- coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String)

gt3r_qf_bckgrd[ /gt3r_delta_time= 0..5058] (Type is Int32)

attributes
- _FillValue: 2147483647 (Type is Int32)
- units: 1 (Type is String)
- contentType: qualityInformation (Type is String)
- long_name: Background Quality Flag (Type is String)
- description: Describes the degree of background photons present in each short segment. bckgrd_dnsty_threshold1= 0.001 (counts per bi per Lseg); bckgrd_dnsty_threshold2= 0.01 (counts per bin per Lseg); bckgrd_dnsty_threshold3= 0.05 (counts per bin per Lseg); bckgrd_dnsty_threshold4= 0.1 (counts per bin per Lseg); bckgrd_dnsty_threshold5= 0.3 (counts per bin per Lseg); bckgrd_dnsty_threshold6= 0.5 (counts per bin per Lseg) (Type is String)
- source: Inland Water ATBD (Type is String)
- flag_meanings: equal_to_or_below_threshold1 equal_to_or_below_threshold2 equal_to_or_below_threshold3 equal_to_or_below_threshold4 equal_to_or_below_threshold5 equal_to_or_below_threshold6 above_threshold6 (Type is String)
- flag_values: 0, 1, 2, 3, 4, 5, 6 (Type is Int32)
- valid_min: 0 (Type is Int32)
- valid_max: 6 (Type is Int32)
- origname: qf_bckgrd (Type is String)
- fullnamepath: /gt3r/qf_bckgrd (Type is String)
- coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String)

gt3r_sseg_mean_time[ /gt3r_delta_time= 0..5058] (Type is Float64)

attributes
- contentType: auxiliaryInformation (Type is String)
- long_name: Short Segment Mean Time (Type is String)
- description: Mean time of the signal-qualified photons in a short segment. (Type is String)
- source: Inland Water ATBD (Type is String)
- _FillValue: 1.7976931348623157e+308 (Type is Float64)
- units: Seconds since 2018-01-01 (Type is String)
- origname: sseg_mean_time (Type is String)
- fullnamepath: /gt3r/sseg_mean_time (Type is String)
- coordinates: gt3r_delta_time (Type is String)

Actions	Download Encoding:
Data URL

Global Attributes	View/Hide granule_type: ATL13 (Type is String) short_name: ATL13 (Type is String) level: 3A (Type is String) description: Along-track inland water height extracted from Land/Water/ Vegetation product. Where data permits, includes roughness, slope and aspect. (Type is String) contributor_name: Thomas E Neumann (thomas.neumann@nasa.gov), Thorsten Markus (thorsten.markus@nasa.gov), Suneel Bhardwaj (suneel.bhardwaj@nasa.gov) David W Hancock III (david.w.hancock@nasa.gov) (Type is String) contributor_role: Instrument Engineer, Investigator, Principle Investigator, Data Producer, Data Producer (Type is String) Conventions: CF-1.6 (Type is String) date_type: UTC (Type is String) featureType: trajectory (Type is String) geospatial_lat_units: degrees_north (Type is String) geospatial_lon_units: degrees_east (Type is String) identifier_product_doi: 10.5067/ATLAS/ATL13.001 (Type is String) identifier_product_doi_authority: http://dx.doi.org (Type is String) identifier_product_type: ATL13 (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. (Type is String) naming_authority: http://dx.doi.org (Type is String) spatial_coverage_type: Horizontal (Type is String) standard_name_vocabulary: CF-1.6 (Type is String) time_type: CCSDS UTC-A (Type is String) date_created: 2019-06-30T15:56:18.000000Z (Type is String) hdfversion: HDF5 1.10.3 (Type is String) history: 2019-06-30T15:56:18.000000Z;2b257122-6d49-3c5b-bc45-6653fa1c58fb;Created by PGE atlas_l3a_iw Version3.1 (Type is String) identifier_file_uuid: 2b257122-6d49-3c5b-bc45-6653fa1c58fb (Type is String) identifier_product_format_version: 3.1 (Type is String) time_coverage_duration: 22630.000000000000 (Type is Float64) time_coverage_end: 2019-03-31T03:39:51.000000Z (Type is String) time_coverage_start: 2019-03-30T21:22:41.000000Z (Type is String) geospatial_lat_min: -90.000000000000000 (Type is Float64) geospatial_lon_min: -180.00000000000000 (Type is Float64) geospatial_lat_max: 90.000000000000000 (Type is Float64) geospatial_lon_max: 180.00000000000000 (Type is Float64) publisher_name: NSIDC DAAC > NASA National Snow and Ice Data Center Distributed Active Archive Center (Type is String) publisher_email: nsidc@nsidc.org (Type is String) publisher_url: http://nsidc.org/daac/ (Type is String) title: ATLAS/ICESat-2 L3A Inland Water Surface Height (Type is String) identifier_file_product_type: ATL13 (Type is String) institution: National Aeronautics and Space Administration (NASA) (Type is String) creator_name: GSFC I-SIPS > ICESat-2 Science Investigator-led Processing System (Type is String) summary: The purpose of ATL13 is to provide along-track inland water surface heights and associated statistics. (Type is String) keywords: EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SURFACE WATER FEATURES > NONE > NONE > NONE > NONE (Type is String) keywords_vocabulary: NASA/GCMD Science Keywords (Type is String) citation: 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. (Type is String) processing_level: 3A (Type is String) references: http://nsidc.org/data/icesat2/data.html (Type is String) project: ICESat-2 > Ice, Cloud, and land Elevation Satellite-2 (Type is String) instrument: ATLAS > Advanced Topographic Laser Altimeter System (Type is String) platform: ICESat-2 > Ice, Cloud, and land Elevation Satellite-2 (Type is String) source: Spacecraft (Type is String) orbit_info Description: Contains orbit information. (Type is String) data_rate: Varies. Data are only provided when one of the stored values (besides time) changes. (Type is String) fullnamepath: /orbit_info (Type is String) METADATA Description: ISO19115 Structured Metadata Represented within HDF5 (Type is String) iso_19139_dataset_xml: <?xml version="1.0"?> <gmd:DS_Series xsi:schemaLocation="http://www.isotc211.org/2005/gmi http://cdn.earthdata.nasa.gov/iso/schema/1.0/ISO19115-2_EOS.xsd" 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"> <gmd:composedOf> <gmd:DS_DataSet> <gmd:has> <gmi:MI_Metadata> <gmd:fileIdentifier> <gmx:FileName>ATL13_20190330212241_00250301_001_01.h5</gmx:FileName> </gmd:fileIdentifier> <gmd:contact> <gmd:CI_ResponsibleParty> <gmd:organisationName> <gco:CharacterString>NSIDC DAAC > National Snow and Ice Data Center DAAC</gco:CharacterString> </gmd:organisationName> <gmd:contactInfo> <gmd:CI_Contact> <gmd:address> <gmd:CI_Address> <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>http://nsidc.org/daac/</gmd:URL> </gmd:linkage> </gmd:CI_OnlineResource> </gmd:onlineResource> </gmd:CI_Contact> </gmd:contactInfo> <gmd:role> <gmd:CI_RoleCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_RoleCode" codeListValue="pointOfContact">pointOfContact</gmd:CI_RoleCode> </gmd:role> </gmd:CI_ResponsibleParty> </gmd:contact> <gmd:dateStamp> <gco:DateTime>2019-06-30T15:56:18.000000Z</gco:DateTime> </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 19115-2:2009-02-15</gco:CharacterString> </gmd:metadataStandardVersion> <gmd:identificationInfo> <gmd:MD_DataIdentification> <gmd:citation> <gmd:CI_Citation> <gmd:title> <gmx:FileName>ATL13_20190330212241_00250301_001_01.h5</gmx:FileName> </gmd:title> <gmd:date> <gmd:CI_Date> <gmd:date> <gco:DateTime>2019-06-30T15:56:18.000000Z</gco:DateTime> </gmd:date> <gmd:dateType> <gmd:CI_DateTypeCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_DateTypeCode" codeListValue="creation">creation</gmd:CI_DateTypeCode> </gmd:dateType> </gmd:CI_Date> </gmd:date> <gmd:identifier> <gmd:MD_Identifier> <gmd:code> <gco:CharacterString>ATL13</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> <gmd:code> <gco:CharacterString>001</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> <gmd:code> <gco:CharacterString>ATL13_20190330212241_00250301_001_01.h5</gco:CharacterString> </gmd:code> <gmd:description> <gco:CharacterString>ProducerGranuleId</gco:CharacterString> </gmd:description> </gmd:MD_Identifier> </gmd:identifier> </gmd:CI_Citation> </gmd:citation> <gmd:abstract> <gco:CharacterString>The ICESat-2 ATL13 standard data product contains along track surface height of inland water bodies. This product contains, for each beam, water surface height, slope, and rms aggregated into segments defined by approximately 100 signal photons. Also includes water surface slope and aspect between neighboring strong beams.</gco:CharacterString> </gmd:abstract> <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:aggregationInfo> <gmd:MD_AggregateInformation> <gmd:aggregateDataSetName> <gmd:CI_Citation> <gmd:title> <gco:CharacterString>ATL13</gco:CharacterString> </gmd:title> <gmd:date gco:nilReason="unknown"/> <gmd:edition> <gco:CharacterString>001</gco:CharacterString> </gmd:edition> </gmd:CI_Citation> </gmd:aggregateDataSetName> <gmd:associationType> <gmd:DS_AssociationTypeCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#DS_AssociationTypeCode" codeListValue="largerWorkCitation">largerWorkCitation</gmd:DS_AssociationTypeCode> </gmd:associationType> </gmd:MD_AggregateInformation> </gmd:aggregationInfo> <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:geographicElement> <gmd:EX_GeographicDescription id="Orbit"> <gmd:geographicIdentifier> <gmd:MD_Identifier> <gmd:code> <gco:CharacterString>AscendingCrossing: 153.00800985196710 StartLatitude: 0.0000000000000000 StartDirection:A EndLatitude: 0.0000000000000000 EndDirection: A</gco:CharacterString> </gmd:code> <gmd:codeSpace> <gco:CharacterString>gov.nasa.esdis.umm.orbitparameters</gco:CharacterString> </gmd:codeSpace> <gmd:description> <gco:CharacterString>OrbitParameters</gco:CharacterString> </gmd:description> </gmd:MD_Identifier> </gmd:geographicIdentifier> </gmd:EX_GeographicDescription> </gmd:geographicElement> <gmd:geographicElement> <gmd:EX_GeographicDescription id="OrbitCalculatedSpatialDomains0"> <gmd:geographicIdentifier> <gmd:MD_Identifier> <gmd:code> <gco:CharacterString>OrbitNumber: 3000 EquatorCrossingLongitude: 153.00800985196710 EquatorCrossingDateTime: 2019-03-30T21:22:41.968204Z</gco:CharacterString> </gmd:code> <gmd:codeSpace> <gco:CharacterString>gov.nasa.esdis.umm.orbitcalculatedspatialdomains</gco:CharacterString> </gmd:codeSpace> <gmd:description> <gco:CharacterString>OrbitCalculatedSpatialDomains</gco:CharacterString> </gmd:description> </gmd:MD_Identifier> </gmd:geographicIdentifier> </gmd:EX_GeographicDescription> </gmd:geographicElement> <gmd:geographicElement> <gmd:EX_GeographicDescription id="OrbitCalculatedSpatialDomains1"> <gmd:geographicIdentifier> <gmd:MD_Identifier> <gmd:code> <gco:CharacterString>OrbitNumber: 3001 EquatorCrossingLongitude: 129.38938089818646 EquatorCrossingDateTime: 2019-03-30T22:56:59.313118Z</gco:CharacterString> </gmd:code> <gmd:codeSpace> <gco:CharacterString>gov.nasa.esdis.umm.orbitcalculatedspatialdomains</gco:CharacterString> </gmd:codeSpace> <gmd:description> <gco:CharacterString>OrbitCalculatedSpatialDomains</gco:CharacterString> </gmd:description> </gmd:MD_Identifier> </gmd:geographicIdentifier> </gmd:EX_GeographicDescription> </gmd:geographicElement><gmd:geographicElement> <gmd:EX_GeographicDescription id="OrbitCalculatedSpatialDomains2"> <gmd:geographicIdentifier> <gmd:MD_Identifier> <gmd:code> <gco:CharacterString>OrbitNumber: 3002 EquatorCrossingLongitude: 105.76958231202948 EquatorCrossingDateTime: 2019-03-31T00:31:16.716515Z</gco:CharacterString> </gmd:code> <gmd:codeSpace> <gco:CharacterString>gov.nasa.esdis.umm.orbitcalculatedspatialdomains</gco:CharacterString> </gmd:codeSpace> <gmd:description> <gco:CharacterString>OrbitCalculatedSpatialDomains</gco:CharacterString> </gmd:description> </gmd:MD_Identifier> </gmd:geographicIdentifier> </gmd:EX_GeographicDescription> </gmd:geographicElement><gmd:geographicElement> <gmd:EX_GeographicDescription id="OrbitCalculatedSpatialDomains3"> <gmd:geographicIdentifier> <gmd:MD_Identifier> <gmd:code> <gco:CharacterString>OrbitNumber: 3003 EquatorCrossingLongitude: 82.148677287185407 EquatorCrossingDateTime: 2019-03-31T02:05:34.187860Z</gco:CharacterString> </gmd:code> <gmd:codeSpace> <gco:CharacterString>gov.nasa.esdis.umm.orbitcalculatedspatialdomains</gco:CharacterString> </gmd:codeSpace> <gmd:description> <gco:CharacterString>OrbitCalculatedSpatialDomains</gco:CharacterString> </gmd:description> </gmd:MD_Identifier> </gmd:geographicIdentifier> </gmd:EX_GeographicDescription> </gmd:geographicElement><gmd:temporalElement> <gmd:EX_TemporalExtent> <gmd:extent> <gml:TimePeriod gml:id="TIME_PERIOD_ID"> <gml:beginPosition>2019-03-30T21:22:41.000000Z</gml:beginPosition> <gml:endPosition>2019-03-31T03:39:51.000000Z</gml:endPosition> </gml:TimePeriod> </gmd:extent> </gmd:EX_TemporalExtent> </gmd:temporalElement> </gmd:EX_Extent> </gmd:extent> </gmd:MD_DataIdentification> </gmd:identificationInfo> <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>2019-06-30T15:56:18.000000Z;2b257122-6d49-3c5b-bc45-6653fa1c58fb;Created by PGE atlas_l3a_iw Version3.1</gco:CharacterString> </gmd:description> <gmd:dateTime> <gco:DateTime>2019-06-30T15:56:18.000000Z</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>ATL13.001</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>http://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 L3A Inland Water Surface Height</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>001</gco:CharacterString> </gmd:edition> <gmd:identifier> <gmd:MD_Identifier> <!-- ECS extracts the ShortName from here --> <gmd:code> <gco:CharacterString>ATL13</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>001</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="http://dx.doi.org/10.5067/ATLAS/ATL13.001">doi:10.5067/ATLAS/ATL13.001</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 ATL13 standard data product contains along track surface height of inland water bodies. This product contains, for each beam, water surface height, slope, and rms aggregated into segments defined by approximately 100 signal photons. Also includes water surface slope and aspect between neighboring strong beams.</gco:CharacterString> </gmd:abstract> <gmd:purpose> <gco:CharacterString>The purpose of ATL13 is to provide along-track inland water surface heights and associated statistics.</gco:CharacterString> </gmd:purpose> <gmd:credit> <gco:CharacterString>The software that generates the ATL13 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 > TERRESTRIAL HYDROSPHERE > SURFACE WATER FEATURES > NONE > NONE > NONE > NONE</gco:CharacterString> </gmd:keyword> <gmd:keyword> <gco:CharacterString>EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SURFACE WATER FEATURES > DRAINAGE BASINS > NONE > NONE > NONE</gco:CharacterString> </gmd:keyword> <gmd:keyword> <gco:CharacterString>EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SURFACE WATER FEATURES > LAKES/RESERVOIRS > NONE > NONE > NONE</gco:CharacterString> </gmd:keyword> <gmd:keyword> <gco:CharacterString>EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SURFACE WATER FEATURES > RIVERS/STREAMS > NONE > NONE > NONE</gco:CharacterString> </gmd:keyword> <gmd:keyword> <gco:CharacterString>EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SURFACE WATER FEATURES > WATER CHANNELS > NONE > NONE > NONE</gco:CharacterString> </gmd:keyword> <gmd:keyword> <gco:CharacterString>EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SURFACE WATER FEATURES > WETLANDS > NONE > 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>http://gcmd.nasa.gov/</gmd:URL> </gmd:linkage> <gmd:protocol> <gco:CharacterString>http</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>http://gcmd.nasa.gov/Resources/valids/</gmd:URL> </gmd:linkage> <gmd:protocol> <gco:CharacterString>http</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=ORBIT, TemporalRangeType=Continuous Range, TimeType=UTC</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:geographicElement> <gmd:EX_GeographicDescription> <gmd:geographicIdentifier> <gmd:MD_Identifier> <gmd:code> <gco:CharacterString>SwathWidth: 36.0 Period: 96.8 InclinationAngle: 92.0 NumberOfOrbits: 4.0 StartCircularLatitude: 0.0</gco:CharacterString> </gmd:code> <gmd:codeSpace> <gco:CharacterString>gov.nasa.esdis.umm.orbitparameters</gco:CharacterString> </gmd:codeSpace> <gmd:description> <gco:CharacterString>OrbitParameters</gco:CharacterString> </gmd:description> </gmd:MD_Identifier> </gmd:geographicIdentifier> </gmd:EX_GeographicDescription> </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>3A</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>3A</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>http</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>http</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>http://dx.doi.org/10.5067/ATLAS/ATL13.001</gmd:URL> </gmd:linkage> <gmd:protocol> <gco:CharacterString>http</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) measureDesciption: 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 characterSet: utf8 (Type is String) edition: Revision - (Type is String) language: eng (Type is String) publicationDate: 12/1/2017 (Type is String) ShortName: ATL13_SDP (Type is String) title: ICESat-2-SIPS-SPEC-4267 - ATLAS Science Algorithm Standard Data Product (SDP) Volume T12 (ATL13). Revision -. (Type is String) fullnamepath: /METADATA/ProductSpecificationDocument (Type is String) METADATA_SeriesIdentification maintenanceAndUpdateFrequency: asNeeded (Type is String) maintenanceDate: SET_BY_META (Type is String) VersionID: 001 (Type is String) identifier_product_DOI: 10.5067/ATLAS/ATL13.001 (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 L3A Inland Water Surface Height (Type is String) shortName: ATL13 (Type is String) revisionDate: 2016-06-09 (Type is String) resourceProviderOrganizationName: National Aeronautics and Space Administration (NASA) (Type is String) abstract: The ICESat-2 ATL13 standard data product contains along track surface height of inland water bodies. This product contains, for each beam, water surface height, slope, and rms aggregated into segments defined by approximately 100 signal photons. Also includes water surface slope and aspect between neighboring strong beams. (Type is String) purpose: The purpose of ATL13 is to provide along-track inland water surface heights and associated statistics. (Type is String) credit: The software that generates the ATL13 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: along-track (Type is String) creationDate: 2019-06-30T15:56:18.000000Z (Type is String) uuid: 2b257122-6d49-3c5b-bc45-6653fa1c58fb (Type is String) fileName: ATL13_20190330212241_00250301_001_01.h5 (Type is String) VersionID: 001 (Type is String) language: eng (Type is String) characterSet: utf8 (Type is String) shortName: ATL13 (Type is String) originatorOrganizationName: GSFC I-SIPS > ICESat-2 Science Investigator-led Processing System (Type is String) abstract: The ICESat-2 ATL13 standard data product contains along track surface height of inland water bodies. This product contains, for each beam, water surface height, slope, and rms aggregated into segments defined by approximately 100 signal photons. Also includes water surface slope and aspect between neighboring strong beams. (Type is String) purpose: The purpose of ATL13 is to provide along-track inland water surface heights and associated statistics. (Type is String) credit: The software that generates the ATL13 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: 90.000000000000000 (Type is Float64) eastBoundLongitude: 180.00000000000000 (Type is Float64) southBoundLatitude: -90.000000000000000 (Type is Float64) westBoundLongitude: -180.00000000000000 (Type is Float64) rangeBeginningDateTime: 2019-03-30T21:22:41.000000Z (Type is String) rangeEndingDateTime: 2019-03-31T03:39:51.000000Z (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: 2019-06-30T19:04:12.000000Z (Type is String) fileName: ATL13_20190330212241_00250301_001_01.qa (Type is String) fullnamepath: /METADATA/QADatasetIdentification (Type is String) METADATA_Lineage: (Type is Container) 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_atlas_l3a_iw_001653013.ctl (Type is String) shortName: CNTL (Type is String) version: 1 (Type is String) fullnamepath: /METADATA/Lineage/Control (Type is String) METADATA_Lineage_ANC38_13 description: ISO 19139 XML file containing DataSet-level metadata information. (Type is String) fileName: ATL13.001.dataset.xml (Type is String) shortName: ANC38-13 (Type is String) uuid: 8ebc4300-9093-313a-b1b4-c49694a31ebe (Type is String) version: 001 (Type is String) fullnamepath: /METADATA/Lineage/ANC38-13 (Type is String) METADATA_Lineage_ANC36_13 description: ISO 19139 XML file containing Series-level metadata information. (Type is String) fileName: ATL13.001.series.xml (Type is String) shortName: ANC36-13 (Type is String) uuid: 70478bf2-ac6b-3fa5-8551-7cb06139928a (Type is String) version: 001 (Type is String) fullnamepath: /METADATA/Lineage/ANC36-13 (Type is String) METADATA_Lineage_ANC26_13 description: HDF5 template file that defines the organization and default content of the product metadata. (Type is String) fileName: atl13_metadata_template.h5 (Type is String) shortName: ANC26-13 (Type is String) uuid: 07e501f7-0672-3882-a153-59eebf1f4300 (Type is String) version: 031 (Type is String) fullnamepath: /METADATA/Lineage/ANC26-13 (Type is String) METADATA_Lineage_ATL03 description: ICESat-2 ATLAS L2A Global Geolocated Photon data products. (Type is String) fileName: ATL03_20190330212241_00250301_001_02.h5, ATL03_20190330212943_00250302_001_02.h5, ATL03_20190330213813_00250303_001_02.h5, ATL03_20190330214338_00250304_001_02.h5, ATL03_20190330214848_00250305_001_02.h5, ATL03_20190330220243_00250307_001_02.h5, ATL03_20190330220945_00250308_001_02.h5, ATL03_20190330221647_00250309_001_02.h5, ATL03_20190330222249_00250310_001_02.h5, ATL03_20190330223030_00250311_001_02.h5, ATL03_20190330223613_00250312_001_02.h5, ATL03_20190330224354_00250313_001_02.h5, ATL03_20190330224956_00250314_001_02.h5, ATL03_20190330225659_00260301_001_02.h5, ATL03_20190330230400_00260302_001_02.h5, ATL03_20190330231231_00260303_001_02.h5, ATL03_20190330231756_00260304_001_02.h5, ATL03_20190330232305_00260305_001_02.h5, ATL03_20190330233700_00260307_001_02.h5, ATL03_20190330234402_00260308_001_02.h5, ATL03_20190330235105_00260309_001_02.h5, ATL03_20190330235707_00260310_001_02.h5, ATL03_20190331000448_00260311_001_02.h5, ATL03_20190331001031_00260312_001_02.h5, ATL03_20190331001812_00260313_001_02.h5, ATL03_20190331002414_00260314_001_02.h5, ATL03_20190331003116_00270301_001_02.h5, ATL03_20190331003818_00270302_001_02.h5, ATL03_20190331004648_00270303_001_02.h5, ATL03_20190331005213_00270304_001_02.h5, ATL03_20190331005723_00270305_001_02.h5, ATL03_20190331010248_00270306_001_02.h5, ATL03_20190331011118_00270307_001_02.h5, ATL03_20190331011820_00270308_001_02.h5, ATL03_20190331012522_00270309_001_02.h5, ATL03_20190331013124_00270310_001_02.h5, ATL03_20190331015229_00270313_001_02.h5, ATL03_20190331015831_00270314_001_02.h5, ATL03_20190331020534_00280301_001_02.h5, ATL03_20190331021236_00280302_001_02.h5, ATL03_20190331022106_00280303_001_02.h5, ATL03_20190331022631_00280304_001_02.h5, ATL03_20190331023140_00280305_001_02.h5, ATL03_20190331023705_00280306_001_02.h5, ATL03_20190331024535_00280307_001_02.h5, ATL03_20190331025237_00280308_001_02.h5, ATL03_20190331025940_00280309_001_02.h5, ATL03_20190331030542_00280310_001_02.h5, ATL03_20190331031323_00280311_001_02.h5, ATL03_20190331031906_00280312_001_02.h5, ATL03_20190331032647_00280313_001_02.h5, ATL03_20190331033249_00280314_001_02.h5 (Type is String) shortName: ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03 (Type is String) uuid: 102309e8-db23-356e-840a-d833d86ca353, 50b783cc-0203-3efd-bb14-50422e1c9343, d14183af-beb4-3d05-ba96-83785865d075, 7cc797e1-3a81-32eb-a6f3-df03347fb42b, 752906dd-f7e0-3b68-a271-316e022e9888, 69f309de-7739-3ea9-b47e-cb8f19e4b849, 61cc5506-5a08-3c3d-ae14-96a6c0e60620, e4dd6564-7d16-3451-9121-ed255475c2bc, 7dafcaec-1199-374d-b5b1-07c4b21ad140, 6c2db160-3d7b-3635-a129-e2b405704f89, 629e8727-d32b-3c64-b880-62947909908c, c10afb1b-84d4-335e-a2cc-60e352a3af34, 1a1ddcf5-2da9-326b-a732-99aa5063a0bc, 2f23af8e-04a8-3a09-bd6e-9007706c49c8, 87aec70f-817e-345d-a850-8fe8530e82f2, 7a499b3c-8abf-31eb-8e87-b7b8c19b4659, 868e3a26-a4ac-37f0-a99a-a7743dfb3584, d2e56059-c623-3513-992c-f8294ce90353, 3b13bed6-953e-3638-bd1c-14c85c5e7310, e6529db1-8d1c-3d0b-ae22-6d6ed7dd80b7, f682995c-2666-3d6c-be23-3b6597785f34, 3ad1d934-00c2-324b-944e-6714d9523c4f, 106151d0-a669-36b6-b6ea-4b83817627b2, 3041bb83-025c-38c7-92db-5247ab917edd, dca81d4b-950c-32ed-b36a-fd06a5e91e33, 66730429-ba53-39e1-ba17-9ae18b6692a3, 3a08b6ca-4198-3a4b-8b86-1bb9023f622f, a78aaedd-4078-32b9-9276-db6b9d982ad4, 8e81e6c7-825f-3b67-916e-0174908f0de2, 12fc52d6-c73a-3a92-b7a8-94be53a21836, 5d04199c-25f7-33f5-8ec3-3153f5a823a6, 9682af56-358d-3713-beaf-a86b54016c4a, 5f0aa37e-99e6-3a5e-ba25-5132f8dc9157, 57ddfa5a-bbdc-3420-ae16-e4ec79f3d810, cc212477-a0f2-34c0-94b2-be831f45e040, abbce1b1-763c-33ad-9080-cfe69139ae10, aaa216bd-08a1-34f5-8d7a-fa70031fcb9e, 383eeff4-5ede-3c50-bcaa-b8018900c652, 0c8f406b-b0e3-33d2-a092-1a9aad57fc16, 09640c6d-963d-3e96-936d-898106b8e834, 93f1a02e-c22b-3bf0-b1d4-c48599d35f70, 0534b0e4-9977-3648-a9cb-bac523c5cd68, 16ced545-f590-3fc2-be6f-c86088dabbeb, 0c6d571f-a242-32cb-a59e-376d98ce2584, dbad6939-1ac8-34ff-ae12-80862b0952e9, 1558dec5-fd9a-312a-9f51-8fe02338139a, 34edd946-2b72-30e4-8e94-13515a0e3521, 8c665313-73b2-3b93-8caa-77b552c08305, 12d3aabd-53a6-319a-9462-5ce64d07ceb7, ff3887e0-6119-3321-b641-5cc3f92001f1, 446bc286-ed1c-3069-9b9b-deef4ddeea89, d8c412cb-df40-3977-8f73-8acac79fbae7 (Type is String) version: 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001, 001 (Type is String) start_cycle: 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3 (Type is Int32) end_cycle: 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3 (Type is Int32) start_orbit: 3000, 3000, 3000, 3000, 3000, 3000, 3000, 3000, 3000, 3000, 3000, 3000, 3000, 3001, 3001, 3001, 3001, 3001, 3001, 3001, 3001, 3001, 3001, 3001, 3001, 3001, 3002, 3002, 3002, 3002, 3002, 3002, 3002, 3002, 3002, 3002, 3002, 3002, 3003, 3003, 3003, 3003, 3003, 3003, 3003, 3003, 3003, 3003, 3003, 3003, 3003, 3003 (Type is Int32) end_orbit: 3000, 3000, 3000, 3000, 3000, 3000, 3000, 3000, 3000, 3000, 3000, 3000, 3000, 3001, 3001, 3001, 3001, 3001, 3001, 3001, 3001, 3001, 3001, 3001, 3001, 3001, 3002, 3002, 3002, 3002, 3002, 3002, 3002, 3002, 3002, 3002, 3002, 3002, 3003, 3003, 3003, 3003, 3003, 3003, 3003, 3003, 3003, 3003, 3003, 3003, 3003, 3003 (Type is Int32) start_rgt: 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28 (Type is Int32) end_rgt: 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28 (Type is Int32) start_region: 1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 12, 13, 14, 1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 12, 13, 14, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 13, 14, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 (Type is Int32) end_region: 1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 12, 13, 14, 1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 12, 13, 14, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 13, 14, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 (Type is Int32) start_geoseg: 1, 149703, 330726, 446059, 555744, 852096, 1001797, 1151688, 1280087, 1443580, 1565330, 1728829, 1857236, 1, 149709, 330736, 446067, 555756, 852097, 1001793, 1151682, 1280081, 1443573, 1565328, 1728826, 1857233, 1, 149708, 330735, 446065, 555758, 671087, 852107, 1001807, 1151698, 1280097, 1728833, 1857235, 1, 149706, 330732, 446065, 555762, 671094, 852121, 1001826, 1151720, 1280119, 1443607, 1565358, 1728844, 1857240 (Type is Int32) end_geoseg: 149702, 330725, 446058, 555743, 671075, 1001796, 1151687, 1280086, 1443579, 1565329, 1728828, 1857235, 2007137, 149708, 330735, 446066, 555755, 671082, 1001792, 1151681, 1280080, 1443572, 1565327, 1728825, 1857232, 2007134, 149707, 330734, 446064, 555757, 671086, 852106, 1001806, 1151697, 1280096, 1443585, 1857234, 2007130, 149705, 330731, 446064, 555761, 671093, 852120, 1001825, 1151719, 1280118, 1443606, 1565357, 1728843, 1857239, 2007130 (Type is Int32) fullnamepath: /METADATA/Lineage/ATL03 (Type is String) METADATA_Lineage_ATL09 description: ICESat-2 ATLAS L3A atmosphere data products. (Type is String) end_geoseg: SET_BY_PGE (Type is String) start_geoseg: SET_BY_PGE (Type is String) fileName: ATL09_20190330212241_00250301_001_01.h5, ATL09_20190330225659_00260301_001_01.h5, ATL09_20190331003116_00270301_001_01.h5, ATL09_20190331020534_00280301_001_01.h5 (Type is String) shortName: ATL09, ATL09, ATL09, ATL09 (Type is String) uuid: f7068fe7-d4fd-3b30-b02f-db225c04b6c1, ac13e9ea-c9a4-3668-8834-6827bb034cd7, 0ee02205-16f3-34cd-a657-0a6421170dc5, b70d63cc-b405-3fb7-bec6-babe7e2f8698 (Type is String) version: 001, 001, 001, 001 (Type is String) start_cycle: 3, 3, 3, 3 (Type is Int32) end_cycle: 3, 3, 3, 3 (Type is Int32) start_orbit: 3000, 3001, 3002, 3003 (Type is Int32) end_orbit: 3000, 3001, 3002, 3003 (Type is Int32) start_rgt: 25, 26, 27, 28 (Type is Int32) end_rgt: 25, 26, 27, 28 (Type is Int32) start_region: 1, 1, 1, 1 (Type is Int32) end_region: 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_ANC25_13 description: HDF5 template file that defines the organization and default content of the product. (Type is String) fileName: atl13_template.h5 (Type is String) shortName: ANC25-13 (Type is String) uuid: 0b695dfb-33de-3c5a-9518-00737a7a168d (Type is String) version: 031 (Type is String) fullnamepath: /METADATA/Lineage/ANC25-13 (Type is String) METADATA_Lineage_ANC20_01 description: Water Basin shapefiles provided by the Inland Water ATBD lead. (Type is String) fileName: ATL13_Region_Mask_by_basins_20170201.dbf (Type is String) shortName: ANC20-01 (Type is String) uuid: 9d332759-a01c-3a75-a4ae-0b4306924e52 (Type is String) version: 20170201 (Type is String) fullnamepath: /METADATA/Lineage/ANC20-01 (Type is String) METADATA_Lineage_ANC20_02 description: Water Body shapefiles provided by the Inland Water ATBD lead. (Type is String) fileName: ATL13_Inland_Water_Body_Mask_v2_20190410.dbf (Type is String) shortName: ANC20-02 (Type is String) uuid: 75f6ef27-bdb5-32cc-a14e-aa0c3ef0d1bf (Type is String) version: 20190410 (Type is String) fullnamepath: /METADATA/Lineage/ANC20-02 (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 2.1.1 (Type is String) softwareDate: Apr 23 2019 (Type is String) softwareTitle: Creates ATLAS HDF5 browse files (Type is String) runTimeParameters: CTL_atlas_l3a_iw_001653013.ctl (Type is String) stepDateTime: 2019-06-30T19:04:14.000000Z (Type is String) fullnamepath: /METADATA/ProcessStep/Browse (Type is String) METADATA_ProcessStep_Metadata processDescription: Metadata information is processed by the metadata utility for each granule produced by SIPS. During PGE processing, dynamic metadata are written to the product. Additional static information is provided with the metadata template. The metadata utility reads ISO Dataset and Series metadata files and updates the product with static information from within those files. The utility then merges the static and dynamic metadata to creates output ISO19139 Dataset and Series XML files. Finally the utility reads the ISO19139 Dataset and Series XML files into memory and stores the textual representations as attributes attached to the /METADATA group. (Type is String) identifier: atlas_meta (Type is String) softwareVersion: Version 4.1.1 (Type is String) softwareDate: Apr 23 2019 (Type is String) softwareTitle: Creates ATLAS XML metadata files (Type is String) runTimeParameters: CTL_atlas_l3a_iw_001653013.ctl (Type is String) stepDateTime: 2019-06-30T19:07:18.000000Z (Type is String) fullnamepath: /METADATA/ProcessStep/Metadata (Type is String) METADATA_ProcessStep_PGE ATBDDate: 9/12/2017 (Type is String) ATBDTitle: ICESat-2-SIPS-SPEC-TBD - SIPs: Inland Water Products L5 Specification Document (Type is String) ATBDVersion: September 12, 2017 (Type is String) documentation: ICESat-2-SIPS-SPEC-5222 - ATLAS Science Algorithm Software Design Description (SDD) Volume 7 (atlas_l3a_iw). Revision -. (Type is String) documentDate: 12/1/2017 (Type is String) processDescription: Computes along-track inland water surface height, slope, and roughness for each ATLAS beam, and also aspect and maximum slope (or gradient) of the planar surface between adjacent strong beams. (Type is String) identifier: atlas_l3a_iw (Type is String) softwareVersion: Version3.1 (Type is String) softwareDate: Apr 23 2019 (Type is String) softwareTitle: ASAS L3A Inland Water PGE (Type is String) runTimeParameters: CTL_atlas_l3a_iw_001653013.ctl (Type is String) stepDateTime: 2019-06-30T15:56:18.000000Z (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: atl13_qa_util (Type is String) softwareVersion: Version 3.1 (Type is String) softwareDate: Apr 23 2019 (Type is String) softwareTitle: ATL13 QA Utility (Type is String) runTimeParameters: CTL_atlas_l3a_iw_001653013.ctl (Type is String) stepDateTime: 2019-06-30T19:04:12.000000Z (Type is String) fullnamepath: /METADATA/ProcessStep/QA (Type is String) gt1r Description: Contains per-beam data products. (Type is String) data_rate: Data within this group are stored at the inland water short segment rate (/ancillary_data/inland_water/s_seg2). (Type is String) atlas_pce: pce1 (Type is String) atlas_beam_type: weak (Type is String) groundtrack_id: gt1r (Type is String) atmosphere_profile: profile_1 (Type is String) atlas_spot_number: 2 (Type is String) sc_orientation: Backward (Type is String) fullnamepath: /gt1r (Type is String) gt2r Description: Contains per-beam data products. (Type is String) data_rate: Data within this group are stored at the inland water short segment rate (/ancillary_data/inland_water/s_seg2). (Type is String) atlas_pce: pce2 (Type is String) atlas_beam_type: weak (Type is String) groundtrack_id: gt2r (Type is String) atmosphere_profile: profile_2 (Type is String) atlas_spot_number: 4 (Type is String) sc_orientation: Backward (Type is String) fullnamepath: /gt2r (Type is String) gt1l Description: Contains per-beam data products. (Type is String) data_rate: Data within this group are stored at the inland water short segment rate (/ancillary_data/inland_water/s_seg2). (Type is String) atlas_pce: pce1 (Type is String) atlas_beam_type: strong (Type is String) groundtrack_id: gt1l (Type is String) atmosphere_profile: profile_1 (Type is String) atlas_spot_number: 1 (Type is String) sc_orientation: Backward (Type is String) fullnamepath: /gt1l (Type is String) quality_assessment Description: Contains quality assessment data. This may include QA counters, QA along-track data and/or QA summary data. (Type is String) fullnamepath: /quality_assessment (Type is String) gt3l Description: Contains per-beam data products. (Type is String) data_rate: Data within this group are stored at the inland water short segment rate (/ancillary_data/inland_water/s_seg2). (Type is String) atlas_pce: pce3 (Type is String) atlas_beam_type: strong (Type is String) groundtrack_id: gt3l (Type is String) atmosphere_profile: profile_3 (Type is String) atlas_spot_number: 5 (Type is String) sc_orientation: Backward (Type is String) fullnamepath: /gt3l (Type is String) gt2l Description: Contains per-beam data products. (Type is String) data_rate: Data within this group are stored at the inland water short segment rate (/ancillary_data/inland_water/s_seg2). (Type is String) atlas_pce: pce2 (Type is String) atlas_beam_type: strong (Type is String) groundtrack_id: gt2l (Type is String) atmosphere_profile: profile_2 (Type is String) atlas_spot_number: 3 (Type is String) sc_orientation: Backward (Type is String) fullnamepath: /gt2l (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_inland_water Description: Contains general ancillary parameters. (Type is String) fullnamepath: /ancillary_data/inland_water (Type is String) gt3r Description: Contains per-beam data products. (Type is String) data_rate: Data within this group are stored at the inland water short segment rate (/ancillary_data/inland_water/s_seg2). (Type is String) atlas_pce: pce3 (Type is String) atlas_beam_type: weak (Type is String) groundtrack_id: gt3r (Type is String) atmosphere_profile: profile_3 (Type is String) atlas_spot_number: 6 (Type is String) sc_orientation: Backward (Type is String) fullnamepath: /gt3r (Type is String) DODS_EXTRA Unlimited_Dimension: gt1l_delta_time gt1r_delta_time gt2l_delta_time gt2r_delta_time gt3l_delta_time gt3r_delta_time orbit_info_crossing_time orbit_info_sc_orient_time (Type is String)

Global Dimensions	View/Hide [ /gt1l_delta_time = 0..20075 ] [ /gt1r_delta_time = 0..4702 ] [ /gt2l_delta_time = 0..16301 ] [ /gt2r_delta_time = 0..5099 ] [ /gt3l_delta_time = 0..20712 ] [ /gt3r_delta_time = 0..5058 ] [ /orbit_info_crossing_time = 0..3 ] [ /orbit_info_sc_orient_time = 0..0 ] [ /FakeDim0 = 0..0 ] [ /FakeDim1 = 0..8 ] [ /FakeDim3 = 0..8 ] [ /FakeDim4 = 0..1 ] [ /FakeDim5 = 0..3 ]

Variables	gt1l_delta_time[ /gt1l_delta_time= 0..20075] (Type is Float64) attributes units: seconds since 2018-01-01 (Type is String) contentType: physicalMeasurement (Type is String) long_name: Delta Time (Type is String) standard_name: time (Type is String) description: Number of GPS seconds since the ATLAS SDP epoch. 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 is String) source: ATL03 (Type is String) coordinates: segment_lat segment_lon (Type is String) origname: delta_time (Type is String) fullnamepath: /gt1l/delta_time (Type is String) gt1r_delta_time[ /gt1r_delta_time= 0..4702] (Type is Float64) attributes units: seconds since 2018-01-01 (Type is String) contentType: physicalMeasurement (Type is String) long_name: Delta Time (Type is String) standard_name: time (Type is String) description: Number of GPS seconds since the ATLAS SDP epoch. 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 is String) source: ATL03 (Type is String) coordinates: segment_lat segment_lon (Type is String) origname: delta_time (Type is String) fullnamepath: /gt1r/delta_time (Type is String) gt2l_delta_time[ /gt2l_delta_time= 0..16301] (Type is Float64) attributes units: seconds since 2018-01-01 (Type is String) contentType: physicalMeasurement (Type is String) long_name: Delta Time (Type is String) standard_name: time (Type is String) description: Number of GPS seconds since the ATLAS SDP epoch. 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 is String) source: ATL03 (Type is String) coordinates: segment_lat segment_lon (Type is String) origname: delta_time (Type is String) fullnamepath: /gt2l/delta_time (Type is String) gt2r_delta_time[ /gt2r_delta_time= 0..5099] (Type is Float64) attributes units: seconds since 2018-01-01 (Type is String) contentType: physicalMeasurement (Type is String) long_name: Delta Time (Type is String) standard_name: time (Type is String) description: Number of GPS seconds since the ATLAS SDP epoch. 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 is String) source: ATL03 (Type is String) coordinates: segment_lat segment_lon (Type is String) origname: delta_time (Type is String) fullnamepath: /gt2r/delta_time (Type is String) gt3l_delta_time[ /gt3l_delta_time= 0..20712] (Type is Float64) attributes units: seconds since 2018-01-01 (Type is String) contentType: physicalMeasurement (Type is String) long_name: Delta Time (Type is String) standard_name: time (Type is String) description: Number of GPS seconds since the ATLAS SDP epoch. 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 is String) source: ATL03 (Type is String) coordinates: segment_lat segment_lon (Type is String) origname: delta_time (Type is String) fullnamepath: /gt3l/delta_time (Type is String) gt3r_delta_time[ /gt3r_delta_time= 0..5058] (Type is Float64) attributes units: seconds since 2018-01-01 (Type is String) contentType: physicalMeasurement (Type is String) long_name: Delta Time (Type is String) standard_name: time (Type is String) description: Number of GPS seconds since the ATLAS SDP epoch. 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 is String) source: ATL03 (Type is String) coordinates: segment_lat segment_lon (Type is String) origname: delta_time (Type is String) fullnamepath: /gt3r/delta_time (Type is String) orbit_info_crossing_time[ /orbit_info_crossing_time= 0..3] (Type is Float64) attributes units: seconds since 2018-01-01 (Type is String) contentType: referenceInformation (Type is String) long_name: Ascending Node Crossing Time (Type is String) standard_name: time (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 is String) source: POD/PPD (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 units: seconds since 2018-01-01 (Type is String) contentType: referenceInformation (Type is String) long_name: Time of Last Spacecraft Orientation Change (Type is String) standard_name: time (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 is String) source: POD/PPD (Type is String) origname: sc_orient_time (Type is String) fullnamepath: /orbit_info/sc_orient_time (Type is String) FakeDim0[ /FakeDim0= 0..0] (Type is Int32) attributes units: level (Type is String) FakeDim1[ /FakeDim1= 0..8] (Type is Int32) attributes units: level (Type is String) FakeDim3[ /FakeDim3= 0..8] (Type is Int32) attributes units: level (Type is String) FakeDim4[ /FakeDim4= 0..1] (Type is Int32) attributes units: level (Type is String) FakeDim5[ /FakeDim5= 0..3] (Type is Int32) attributes units: level (Type is String) orbit_info_cycle_number[ /orbit_info_crossing_time= 0..3] (Type is Int8) attributes units: 1 (Type is String) contentType: referenceInformation (Type is String) long_name: Cycle Number (Type is String) description: A count of the number of exact repeats of this reference orbit. (Type is String) source: Operations (Type is String) valid_min: 0 (Type is Int8) valid_max: 50 (Type is Int8) 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..3] (Type is UInt16) attributes units: 1 (Type is String) contentType: referenceInformation (Type is String) long_name: Orbit Number (Type is String) description: Unique identifying number for each planned ICESat-2 orbit. (Type is String) source: Operations (Type is String) valid_min: 1 (Type is UInt16) valid_max: 65000 (Type is UInt16) 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..3] (Type is Float64) attributes units: degrees_east (Type is String) contentType: referenceInformation (Type is String) long_name: Ascending Node Longitude (Type is String) description: Longitude at the ascending node crossing. (Type is String) source: POD/PPD (Type is String) valid_min: -180.00000000000000 (Type is Float64) valid_max: 180.00000000000000 (Type is Float64) 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 units: 1 (Type is String) contentType: referenceInformation (Type is String) long_name: Spacecraft Orientation (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 is String) source: POD/PPD (Type is String) flag_meanings: backward forward transition (Type is String) flag_values: 0, 1, 2 (Type is Int8) valid_min: 0 (Type is Int8) valid_max: 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..3] (Type is Int16) attributes units: 1 (Type is String) contentType: referenceInformation (Type is String) long_name: Reference Ground track (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 is String) source: POD/PPD (Type is String) valid_min: 1 (Type is Int16) valid_max: 1387 (Type is Int16) origname: rgt (Type is String) fullnamepath: /orbit_info/rgt (Type is String) coordinates: orbit_info_crossing_time (Type is String) gt1r_rgt[ /gt1r_delta_time= 0..4702] (Type is Int16) attributes units: 1 (Type is String) contentType: referenceInformation (Type is String) long_name: Reference Ground track (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 is String) source: ATL03 (Type is String) valid_min: 1 (Type is Int16) valid_max: 1387 (Type is Int16) origname: rgt (Type is String) fullnamepath: /gt1r/rgt (Type is String) coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String) gt1r_qf_bias_fit[ /gt1r_delta_time= 0..4702] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Height Bias Fit Quality Flag (Type is String) description: The height bias fit flag is set based on the value of the goodness of fit bias estimated as the difference between the centroid elevations of the observed surface water histogram and fitted integrated water surface model histogram. The flag values are set as follows: = -3 if H_bias_fit < -0.10 (m); -2 if -0.10 <= H_bias_fit < -0.05;-1 when -0.05 <= H_bias_fit < -0.01; 0 if -0.01 <= H_bias_fit < 0.01 (m); 1 if 0.01 <= H_bias_fit < 0.05; 2 if 0.05 < H_bias_fit < 0.10; 3 if 0.10 <= H_bias_fit; 4 if H_bias_fit is invalid. (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 equal_to_or_above_threshold6 invalid (Type is String) flag_values: -3, -2, -1, 0, 1, 2, 3, 4 (Type is Int32) valid_min: -3 (Type is Int32) valid_max: 4 (Type is Int32) origname: qf_bias_fit (Type is String) fullnamepath: /gt1r/qf_bias_fit (Type is String) coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String) gt1r_sseg_mean_lon[ /gt1r_delta_time= 0..4702] (Type is Float64) attributes units: degrees_east (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Short Segment Mean Longitude (Type is String) description: Mean longitude of the signal-qualified photons in a short segment. (Type is String) source: Inland Water ATBD (Type is String) valid_min: -180.00000000000000 (Type is Float64) valid_max: 180.00000000000000 (Type is Float64) origname: sseg_mean_lon (Type is String) fullnamepath: /gt1r/sseg_mean_lon (Type is String) coordinates: gt1r_delta_time (Type is String) gt1r_qf_ice[ /gt1r_delta_time= 0..4702] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Ice Quality Flag (Type is String) description: The quality flag for ice describes the likelihood of ice on the short water body surface segment. 0 for QF_Bckgrd<= 2; 1 for 2 < QF_Bckgrd<= 4; 2 for 4 < QF_Bckgrd; 3 for (4 < QF_Bckgrd and QF_Cloud=1) (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: qf_bckgrd_le_2 qf_bckgrd_le_4 qf_bckgrd_gt_4 qf_bckgrd_w_cloud (Type is String) flag_values: 0, 1, 2, 3 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 3 (Type is Int32) origname: qf_ice (Type is String) fullnamepath: /gt1r/qf_ice (Type is String) coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String) gt1r_inland_water_body_type[ /gt1r_delta_time= 0..4702] (Type is Int8) attributes _FillValue: 127 (Type is Int8) units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Body Type (Type is String) description: Type of Inland Water Body, where 1=Lake, 2=Known Reservoir, 3=(Reserved for future use), 4=Ephemeral Water, 5=River, 6=Estuary or Bay, 7=Coastal Water, 8=Reserved, 9=Reserved (Type is String) source: ATL13 ATBD, Section 5.3.1 (C) (Type is String) flag_meanings: Lake Known_Reservoir Reserved_for_future_use Ephemeral_Water River Estuary_or_Bay Coastal_Water Reserved Reserved (Type is String) flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 (Type is Int8) valid_min: 1 (Type is Int8) valid_max: 9 (Type is Int8) origname: inland_water_body_type (Type is String) fullnamepath: /gt1r/inland_water_body_type (Type is String) coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String) gt1r_inland_water_body_id[ /gt1r_delta_time= 0..4702] (Type is Int32) attributes contentType: referenceInformation (Type is String) long_name: Body ID (Type is String) description: Identifying signature of an individual inland water body. Each body of water is represented by a unique numeric value. (Type is String) source: ATL13 ATBD, Section 5.3.1 (C) (Type is String) _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) origname: inland_water_body_id (Type is String) fullnamepath: /gt1r/inland_water_body_id (Type is String) coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String) gt1r_segment_geoid[ /gt1r_delta_time= 0..4702] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: meters (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Segment Geoid (Type is String) description: Applicable geoid value at reporting location for all short segment statistics. (Type is String) source: ATL03 (Type is String) origname: segment_geoid (Type is String) fullnamepath: /gt1r/segment_geoid (Type is String) coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String) gt1r_qf_sseg_length[ /gt1r_delta_time= 0..4702] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Short Segment Length flag (Type is String) description: The Short Segment Length flag is set based on the length of the short segment. The flag is set as follows: 0 if sseg_length< 50 (meters); 1 if 50 <sseg_length < 150 (meters); 2 if 150 < sseg_length< 300 (meters); 3 if 300 < sseg_length. (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: below_threshold1 below_threshold2 below_threshold3 above_threshold4 (Type is String) flag_values: 0, 1, 2, 3 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 3 (Type is Int32) origname: qf_sseg_length (Type is String) fullnamepath: /gt1r/qf_sseg_length (Type is String) coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String) gt1r_qf_lseg_length[ /gt1r_delta_time= 0..4702] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Long Segment Length flag (Type is String) description: The Long Segment Length flag is set based on the length of the long segment. The flag is set as follows: 0 if Lseg_length < 500 (meters); 1 if 50 <= Lseg_length < 1500 (meters); 2 if 150 <= Lseg_length < 3000 (meters); 3 if 3000 <= Lseg_length (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: below_threshold1 below_threshold2 below_threshold3 above_threshold4 (Type is String) flag_values: 0, 1, 2, 3 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 3 (Type is Int32) origname: qf_lseg_length (Type is String) fullnamepath: /gt1r/qf_lseg_length (Type is String) coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String) gt1r_significant_wave_ht[ /gt1r_delta_time= 0..4702] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: meters (Type is String) contentType: physicalMeasurement (Type is String) long_name: SWH (Type is String) description: Significant wave height (Type is String) source: section 5.3.3 (C) (Type is String) origname: significant_wave_ht (Type is String) fullnamepath: /gt1r/significant_wave_ht (Type is String) coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String) gt1r_qf_bias_em[ /gt1r_delta_time= 0..4702] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: EM Bias Quality Flag (Type is String) description: The Electromagnetic Bias flag is set based on threshold checks for the estimated electromagnetic height bias. The flag is set as follows: -3 if H_bias_EM < -0.10 (m); -2 if -0.10 < H_bias_EM < -0.05; -1 if -0.05 <= H_bias_EM < -0.01; 0 if -0.01 <= H_bias_EM < 0.01 (m); 1 if 0.01 <= H_bias_EM < 0.05; 2 if 0.05 <= H_bias_EM < 0.10; 3 if 0.10 < H_bias_EM; 4 if H_bias_EM is invalid. (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 above_threshold6 invalid (Type is String) flag_values: -3, -2, -1, 0, 1, 2, 3, 4 (Type is Int32) valid_min: -3 (Type is Int32) valid_max: 4 (Type is Int32) origname: qf_bias_em (Type is String) fullnamepath: /gt1r/qf_bias_em (Type is String) coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String) gt1r_segment_id_end[ /gt1r_delta_time= 0..4702] (Type is Int32) attributes units: 1 (Type is String) contentType: referenceInformation (Type is String) long_name: Last ATL03 Segment ID (Type is String) description: Last ATL03 segment_id associated with the photons within this inland water segment. (Type is String) source: ATL03 (Type is String) origname: segment_id_end (Type is String) fullnamepath: /gt1r/segment_id_end (Type is String) coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String) gt1r_stdev_water_surf[ /gt1r_delta_time= 0..4702] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: meters (Type is String) contentType: referenceInformation (Type is String) long_name: Surface StDev (Type is String) description: Standard deviation of water surface, calculated over long segments with result reported at each short segment location tag contained within. (Type is String) source: section 5.3.3 (C) (Type is String) origname: stdev_water_surf (Type is String) fullnamepath: /gt1r/stdev_water_surf (Type is String) coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String) gt1r_qf_iwp[ /gt1r_delta_time= 0..4702] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) contentType: qualityInformation (Type is String) long_name: Inland Water Segment Processing Flag (Type is String) description: Inland Water segment Processing (IWP) flag to describe the level of processing the inland water algorithm was able to perform on each short segment based on the data available, ranging from 1 to 7. (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: 1_short_segment 2_short_segments 3_to_5_short_segments 6_to_7_short_segments 8_to_9_short_segments 10_to_29_short_segments 30_or_more_short_segments_analyzed (Type is String) flag_values: 1, 2, 3, 4, 5, 6, 7 (Type is Int32) valid_min: 1 (Type is Int32) valid_max: 7 (Type is Int32) origname: qf_iwp (Type is String) fullnamepath: /gt1r/qf_iwp (Type is String) coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String) gt1r_segment_id_beg[ /gt1r_delta_time= 0..4702] (Type is Int32) attributes units: 1 (Type is String) contentType: referenceInformation (Type is String) long_name: First ATL03 Segment ID (Type is String) description: First ATL03 segment_id associated with the photons within this inland water segment. (Type is String) source: ATL03 (Type is String) origname: segment_id_beg (Type is String) fullnamepath: /gt1r/segment_id_beg (Type is String) coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String) gt1r_cycle[ /gt1r_delta_time= 0..4702] (Type is Int8) attributes units: counts (Type is String) contentType: referenceInformation (Type is String) long_name: Cycle Number (Type is String) description: Tracks the number of 91-day cycles in the mission, beginning with 01. (Type is String) source: ATL03 (Type is String) valid_min: 0 (Type is Int8) valid_max: 50 (Type is Int8) origname: cycle (Type is String) fullnamepath: /gt1r/cycle (Type is String) coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String) gt1r_qf_subsurf_anomaly[ /gt1r_delta_time= 0..4702] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Subsurface Anomaly Quality Flag (Type is String) description: The subsurface anomaly flag is defined as in atbd section 4.5.5.5 above. It is computed for each bin between 6 Stdev below the mean of the integrated model to 20m depth. The anomaly is set to 0 when bin value +<+3* subsurface mean plus s~sub~subsurface and set to 1 when subsurface bin value is other (meaning an anomaly exists) (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: unlikely_subsurface likely_subsurface (Type is String) flag_values: 0, 1 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 1 (Type is Int32) origname: qf_subsurf_anomaly (Type is String) fullnamepath: /gt1r/qf_subsurf_anomaly (Type is String) coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String) gt1r_subsurface_attenuation[ /gt1r_delta_time= 0..4702] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: 1 (Type is String) contentType: physicalMeasurement (Type is String) long_name: Subsurface Attenuation (Type is String) description: Subsurface attenuation coefficient. (Type is String) source: section 5.3.4 (A) (Type is String) origname: subsurface_attenuation (Type is String) fullnamepath: /gt1r/subsurface_attenuation (Type is String) coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String) gt1r_inland_water_body_region[ /gt1r_delta_time= 0..4702] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: referenceInformation (Type is String) long_name: Body Region (Type is String) description: ATL13-created shapefile representing relevant bodies of water over which to implement the ATL13 water surface finding algorithm only within a region of processing interest. (Type is String) source: section 5.3.1 (A) (Type is String) origname: inland_water_body_region (Type is String) fullnamepath: /gt1r/inland_water_body_region (Type is String) coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String) gt1r_ice_flag[ /gt1r_delta_time= 0..4702] (Type is Int8) attributes units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Ice Flag (Type is String) description: Flag indicating significant existence of ice on the water surface (Type is String) source: section 5.3.2 (D) (Type is String) flag_meanings: no_ice ice (Type is String) flag_values: 0, 1 (Type is Int8) valid_min: 0 (Type is Int8) valid_max: 1 (Type is Int8) origname: ice_flag (Type is String) fullnamepath: /gt1r/ice_flag (Type is String) coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String) gt1r_segment_lon[ /gt1r_delta_time= 0..4702] (Type is Float64) attributes units: degrees_east (Type is String) contentType: physicalMeasurement (Type is String) long_name: Longitude (Type is String) standard_name: longitude (Type is String) description: Longitude of reporting location (Type is String) source: section 5.3.5 (A) (Type is String) valid_min: -180.00000000000000 (Type is Float64) valid_max: 180.00000000000000 (Type is Float64) origname: segment_lon (Type is String) fullnamepath: /gt1r/segment_lon (Type is String) coordinates: gt1r_delta_time gt1r_segment_lat (Type is String) gt1r_ht_ortho[ /gt1r_delta_time= 0..4702] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: meters (Type is String) contentType: physicalMeasurement (Type is String) long_name: Orthometric Height (Type is String) description: Orthometric height converted from ellipsoidal height. (Type is String) source: section 5.3.5 (A) (Type is String) origname: ht_ortho (Type is String) fullnamepath: /gt1r/ht_ortho (Type is String) coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String) gt1r_segment_lat[ /gt1r_delta_time= 0..4702] (Type is Float64) attributes units: degrees_north (Type is String) contentType: physicalMeasurement (Type is String) long_name: Latitude (Type is String) standard_name: latitude (Type is String) description: Latitude of reporting location (Type is String) source: section 5.3.5 (A) (Type is String) valid_min: -90.000000000000000 (Type is Float64) valid_max: 90.000000000000000 (Type is Float64) origname: segment_lat (Type is String) fullnamepath: /gt1r/segment_lat (Type is String) coordinates: gt1r_delta_time gt1r_segment_lon (Type is String) gt1r_ht_water_surf[ /gt1r_delta_time= 0..4702] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: meters (Type is String) contentType: physicalMeasurement (Type is String) long_name: Water Surface Height (Type is String) description: Water surface height with reference to WGS84 ellipsoid (Type is String) source: section 5.3.5 (A) (Type is String) origname: ht_water_surf (Type is String) fullnamepath: /gt1r/ht_water_surf (Type is String) coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String) gt1r_err_ht_water_surf[ /gt1r_delta_time= 0..4702] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Height Error (Type is String) description: Error included in heights reported in ht_water_surf. (Type is String) source: section 5.3.3 (C) (Type is String) origname: err_ht_water_surf (Type is String) fullnamepath: /gt1r/err_ht_water_surf (Type is String) coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String) gt1r_atl13refid[ /gt1r_delta_time= 0..4702] (Type is Int64) attributes _FillValue: 0 (Type is Int64) units: 1 (Type is String) contentType: referenceInformation (Type is String) long_name: ATL13 Reference ID (Type is String) description: Unique aggregate reference number for each shape in the ATL13 Inland Water Body Mask, where digit 1 = type, digit 2 = size, digit 3 = source, and digits 4-10 = shape id (Type is String) source: ATL13 ATBD, Section 5.3.1 (C) (Type is String) origname: atl13refid (Type is String) fullnamepath: /gt1r/atl13refid (Type is String) coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String) gt1r_qf_cloud[ /gt1r_delta_time= 0..4702] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Consolidated cloud flag (Type is String) description: This flag is a combination of multiple flags (cloud_flag_atm, cloud_flag_asr, and bsnow_con) and takes daytime/nighttime into consideration. A value of 1 means clouds or blowing snow are likely present. A value of 0 indicates the likely absence of clouds or blowing snow. From the ATL09 data closest to the segment time. (Type is String) source: ATL09 (Type is String) flag_meanings: likely_clear likely_cloudy (Type is String) flag_values: 0, 1 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 1 (Type is Int32) origname: qf_cloud (Type is String) fullnamepath: /gt1r/qf_cloud (Type is String) coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String) gt1r_inland_water_body_source[ /gt1r_delta_time= 0..4702] (Type is Int8) attributes _FillValue: 127 (Type is Int8) units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Body Source (Type is String) description: Source of Inland Water Body shape, where 1=HydroLAKES, 2=Global Lakes and Wetlands Database, 3=Named Marine Water Bodies, 4=GSHHG Shoreline, 5=Reserved, 6=Reserved, 7=Reserved, 8=Reserved, 9=Reserved (Type is String) source: ATL13 ATBD, Section 5.3.1 (C) (Type is String) flag_meanings: HydroLAKES Global_Lakes_and_Wetlands_Database Named_Marine_Water_Bodies GSHHG_Shoreline Reserved Reserved Reserved Reserved Reserved (Type is String) flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 (Type is Int8) valid_min: 1 (Type is Int8) valid_max: 9 (Type is Int8) origname: inland_water_body_source (Type is String) fullnamepath: /gt1r/inland_water_body_source (Type is String) coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String) gt1r_inland_water_body_size[ /gt1r_delta_time= 0..4702] (Type is Int8) attributes _FillValue: 127 (Type is Int8) units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Body Size (Type is String) description: Size of Inland Water Body, A=area, where 1=A>10,000 km2, 2=10,000>A>=1,000, 3=1,000>A>=100, 4=100>A>=10, 5=10>A>=1, 6=1>A>=0.1, 7=0.01>A, 8=Reserved, 9=Reserved (Type is String) source: ATL13 ATBD, Section 5.3.1 (C) (Type is String) flag_meanings: A>10000 10000>A>=1000 1000>A>=100 100>A>=10 10>A>=1 1>A>=0.1 0.01>A Reserved Reserved (Type is String) flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 (Type is Int8) valid_min: 1 (Type is Int8) valid_max: 9 (Type is Int8) origname: inland_water_body_size (Type is String) fullnamepath: /gt1r/inland_water_body_size (Type is String) coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String) gt1r_err_slope_trk[ /gt1r_delta_time= 0..4702] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Slope Error (Type is String) description: Error included in segment_slope_trk_local. (Type is String) source: section 5.3.3 (C) (Type is String) origname: err_slope_trk (Type is String) fullnamepath: /gt1r/err_slope_trk (Type is String) coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String) gt1r_segment_slope_trk_bdy[ /gt1r_delta_time= 0..4702] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: 1 (Type is String) contentType: physicalMeasurement (Type is String) long_name: Water Body Slope (Type is String) description: Along track water body surface slope. (Type is String) source: section 5.3.5 (A) (Type is String) origname: segment_slope_trk_bdy (Type is String) fullnamepath: /gt1r/segment_slope_trk_bdy (Type is String) coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String) gt1r_sseg_mean_lat[ /gt1r_delta_time= 0..4702] (Type is Float64) attributes _FillValue: 1.7976931348623157e+308 (Type is Float64) units: degrees_north (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Short Segment Mean Latitude (Type is String) description: Mean latitude of the signal-qualified photons in a short segment. (Type is String) source: Inland Water ATBD (Type is String) valid_min: -90.000000000000000 (Type is Float64) valid_max: 90.000000000000000 (Type is Float64) origname: sseg_mean_lat (Type is String) fullnamepath: /gt1r/sseg_mean_lat (Type is String) coordinates: gt1r_delta_time (Type is String) gt1r_qf_spec_width[ /gt1r_delta_time= 0..4702] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Spectral Width Flag (Type is String) description: The Spectral Width flag is set based on threshold checks for the estimated Spectral Width. The flag is set as follows: 0 if spec_width < 0.5; 1 if spec_width >= +0.5. (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: below_0.5 above_0.5 (Type is String) flag_values: 0, 1 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 1 (Type is Int32) origname: qf_spec_width (Type is String) fullnamepath: /gt1r/qf_spec_width (Type is String) coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String) gt1r_qf_bckgrd[ /gt1r_delta_time= 0..4702] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Background Quality Flag (Type is String) description: Describes the degree of background photons present in each short segment. bckgrd_dnsty_threshold1= 0.001 (counts per bi per Lseg); bckgrd_dnsty_threshold2= 0.01 (counts per bin per Lseg); bckgrd_dnsty_threshold3= 0.05 (counts per bin per Lseg); bckgrd_dnsty_threshold4= 0.1 (counts per bin per Lseg); bckgrd_dnsty_threshold5= 0.3 (counts per bin per Lseg); bckgrd_dnsty_threshold6= 0.5 (counts per bin per Lseg) (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: equal_to_or_below_threshold1 equal_to_or_below_threshold2 equal_to_or_below_threshold3 equal_to_or_below_threshold4 equal_to_or_below_threshold5 equal_to_or_below_threshold6 above_threshold6 (Type is String) flag_values: 0, 1, 2, 3, 4, 5, 6 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 6 (Type is Int32) origname: qf_bckgrd (Type is String) fullnamepath: /gt1r/qf_bckgrd (Type is String) coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon (Type is String) gt1r_sseg_mean_time[ /gt1r_delta_time= 0..4702] (Type is Float64) attributes contentType: auxiliaryInformation (Type is String) long_name: Short Segment Mean Time (Type is String) description: Mean time of the signal-qualified photons in a short segment. (Type is String) source: Inland Water ATBD (Type is String) _FillValue: 1.7976931348623157e+308 (Type is Float64) units: Seconds since 2018-01-01 (Type is String) origname: sseg_mean_time (Type is String) fullnamepath: /gt1r/sseg_mean_time (Type is String) coordinates: gt1r_delta_time (Type is String) gt2r_rgt[ /gt2r_delta_time= 0..5099] (Type is Int16) attributes units: 1 (Type is String) contentType: referenceInformation (Type is String) long_name: Reference Ground track (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 is String) source: ATL03 (Type is String) valid_min: 1 (Type is Int16) valid_max: 1387 (Type is Int16) origname: rgt (Type is String) fullnamepath: /gt2r/rgt (Type is String) coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String) gt2r_qf_bias_fit[ /gt2r_delta_time= 0..5099] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Height Bias Fit Quality Flag (Type is String) description: The height bias fit flag is set based on the value of the goodness of fit bias estimated as the difference between the centroid elevations of the observed surface water histogram and fitted integrated water surface model histogram. The flag values are set as follows: = -3 if H_bias_fit < -0.10 (m); -2 if -0.10 <= H_bias_fit < -0.05;-1 when -0.05 <= H_bias_fit < -0.01; 0 if -0.01 <= H_bias_fit < 0.01 (m); 1 if 0.01 <= H_bias_fit < 0.05; 2 if 0.05 < H_bias_fit < 0.10; 3 if 0.10 <= H_bias_fit; 4 if H_bias_fit is invalid. (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 equal_to_or_above_threshold6 invalid (Type is String) flag_values: -3, -2, -1, 0, 1, 2, 3, 4 (Type is Int32) valid_min: -3 (Type is Int32) valid_max: 4 (Type is Int32) origname: qf_bias_fit (Type is String) fullnamepath: /gt2r/qf_bias_fit (Type is String) coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String) gt2r_sseg_mean_lon[ /gt2r_delta_time= 0..5099] (Type is Float64) attributes units: degrees_east (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Short Segment Mean Longitude (Type is String) description: Mean longitude of the signal-qualified photons in a short segment. (Type is String) source: Inland Water ATBD (Type is String) valid_min: -180.00000000000000 (Type is Float64) valid_max: 180.00000000000000 (Type is Float64) origname: sseg_mean_lon (Type is String) fullnamepath: /gt2r/sseg_mean_lon (Type is String) coordinates: gt2r_delta_time (Type is String) gt2r_qf_ice[ /gt2r_delta_time= 0..5099] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Ice Quality Flag (Type is String) description: The quality flag for ice describes the likelihood of ice on the short water body surface segment. 0 for QF_Bckgrd<= 2; 1 for 2 < QF_Bckgrd<= 4; 2 for 4 < QF_Bckgrd; 3 for (4 < QF_Bckgrd and QF_Cloud=1) (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: qf_bckgrd_le_2 qf_bckgrd_le_4 qf_bckgrd_gt_4 qf_bckgrd_w_cloud (Type is String) flag_values: 0, 1, 2, 3 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 3 (Type is Int32) origname: qf_ice (Type is String) fullnamepath: /gt2r/qf_ice (Type is String) coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String) gt2r_inland_water_body_type[ /gt2r_delta_time= 0..5099] (Type is Int8) attributes _FillValue: 127 (Type is Int8) units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Body Type (Type is String) description: Type of Inland Water Body, where 1=Lake, 2=Known Reservoir, 3=(Reserved for future use), 4=Ephemeral Water, 5=River, 6=Estuary or Bay, 7=Coastal Water, 8=Reserved, 9=Reserved (Type is String) source: ATL13 ATBD, Section 5.3.1 (C) (Type is String) flag_meanings: Lake Known_Reservoir Reserved_for_future_use Ephemeral_Water River Estuary_or_Bay Coastal_Water Reserved Reserved (Type is String) flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 (Type is Int8) valid_min: 1 (Type is Int8) valid_max: 9 (Type is Int8) origname: inland_water_body_type (Type is String) fullnamepath: /gt2r/inland_water_body_type (Type is String) coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String) gt2r_inland_water_body_id[ /gt2r_delta_time= 0..5099] (Type is Int32) attributes contentType: referenceInformation (Type is String) long_name: Body ID (Type is String) description: Identifying signature of an individual inland water body. Each body of water is represented by a unique numeric value. (Type is String) source: ATL13 ATBD, Section 5.3.1 (C) (Type is String) _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) origname: inland_water_body_id (Type is String) fullnamepath: /gt2r/inland_water_body_id (Type is String) coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String) gt2r_segment_geoid[ /gt2r_delta_time= 0..5099] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: meters (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Segment Geoid (Type is String) description: Applicable geoid value at reporting location for all short segment statistics. (Type is String) source: ATL03 (Type is String) origname: segment_geoid (Type is String) fullnamepath: /gt2r/segment_geoid (Type is String) coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String) gt2r_qf_sseg_length[ /gt2r_delta_time= 0..5099] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Short Segment Length flag (Type is String) description: The Short Segment Length flag is set based on the length of the short segment. The flag is set as follows: 0 if sseg_length< 50 (meters); 1 if 50 <sseg_length < 150 (meters); 2 if 150 < sseg_length< 300 (meters); 3 if 300 < sseg_length. (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: below_threshold1 below_threshold2 below_threshold3 above_threshold4 (Type is String) flag_values: 0, 1, 2, 3 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 3 (Type is Int32) origname: qf_sseg_length (Type is String) fullnamepath: /gt2r/qf_sseg_length (Type is String) coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String) gt2r_qf_lseg_length[ /gt2r_delta_time= 0..5099] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Long Segment Length flag (Type is String) description: The Long Segment Length flag is set based on the length of the long segment. The flag is set as follows: 0 if Lseg_length < 500 (meters); 1 if 50 <= Lseg_length < 1500 (meters); 2 if 150 <= Lseg_length < 3000 (meters); 3 if 3000 <= Lseg_length (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: below_threshold1 below_threshold2 below_threshold3 above_threshold4 (Type is String) flag_values: 0, 1, 2, 3 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 3 (Type is Int32) origname: qf_lseg_length (Type is String) fullnamepath: /gt2r/qf_lseg_length (Type is String) coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String) gt2r_significant_wave_ht[ /gt2r_delta_time= 0..5099] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: meters (Type is String) contentType: physicalMeasurement (Type is String) long_name: SWH (Type is String) description: Significant wave height (Type is String) source: section 5.3.3 (C) (Type is String) origname: significant_wave_ht (Type is String) fullnamepath: /gt2r/significant_wave_ht (Type is String) coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String) gt2r_qf_bias_em[ /gt2r_delta_time= 0..5099] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: EM Bias Quality Flag (Type is String) description: The Electromagnetic Bias flag is set based on threshold checks for the estimated electromagnetic height bias. The flag is set as follows: -3 if H_bias_EM < -0.10 (m); -2 if -0.10 < H_bias_EM < -0.05; -1 if -0.05 <= H_bias_EM < -0.01; 0 if -0.01 <= H_bias_EM < 0.01 (m); 1 if 0.01 <= H_bias_EM < 0.05; 2 if 0.05 <= H_bias_EM < 0.10; 3 if 0.10 < H_bias_EM; 4 if H_bias_EM is invalid. (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 above_threshold6 invalid (Type is String) flag_values: -3, -2, -1, 0, 1, 2, 3, 4 (Type is Int32) valid_min: -3 (Type is Int32) valid_max: 4 (Type is Int32) origname: qf_bias_em (Type is String) fullnamepath: /gt2r/qf_bias_em (Type is String) coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String) gt2r_segment_id_end[ /gt2r_delta_time= 0..5099] (Type is Int32) attributes units: 1 (Type is String) contentType: referenceInformation (Type is String) long_name: Last ATL03 Segment ID (Type is String) description: Last ATL03 segment_id associated with the photons within this inland water segment. (Type is String) source: ATL03 (Type is String) origname: segment_id_end (Type is String) fullnamepath: /gt2r/segment_id_end (Type is String) coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String) gt2r_stdev_water_surf[ /gt2r_delta_time= 0..5099] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: meters (Type is String) contentType: referenceInformation (Type is String) long_name: Surface StDev (Type is String) description: Standard deviation of water surface, calculated over long segments with result reported at each short segment location tag contained within. (Type is String) source: section 5.3.3 (C) (Type is String) origname: stdev_water_surf (Type is String) fullnamepath: /gt2r/stdev_water_surf (Type is String) coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String) gt2r_qf_iwp[ /gt2r_delta_time= 0..5099] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) contentType: qualityInformation (Type is String) long_name: Inland Water Segment Processing Flag (Type is String) description: Inland Water segment Processing (IWP) flag to describe the level of processing the inland water algorithm was able to perform on each short segment based on the data available, ranging from 1 to 7. (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: 1_short_segment 2_short_segments 3_to_5_short_segments 6_to_7_short_segments 8_to_9_short_segments 10_to_29_short_segments 30_or_more_short_segments_analyzed (Type is String) flag_values: 1, 2, 3, 4, 5, 6, 7 (Type is Int32) valid_min: 1 (Type is Int32) valid_max: 7 (Type is Int32) origname: qf_iwp (Type is String) fullnamepath: /gt2r/qf_iwp (Type is String) coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String) gt2r_segment_id_beg[ /gt2r_delta_time= 0..5099] (Type is Int32) attributes units: 1 (Type is String) contentType: referenceInformation (Type is String) long_name: First ATL03 Segment ID (Type is String) description: First ATL03 segment_id associated with the photons within this inland water segment. (Type is String) source: ATL03 (Type is String) origname: segment_id_beg (Type is String) fullnamepath: /gt2r/segment_id_beg (Type is String) coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String) gt2r_cycle[ /gt2r_delta_time= 0..5099] (Type is Int8) attributes units: counts (Type is String) contentType: referenceInformation (Type is String) long_name: Cycle Number (Type is String) description: Tracks the number of 91-day cycles in the mission, beginning with 01. (Type is String) source: ATL03 (Type is String) valid_min: 0 (Type is Int8) valid_max: 50 (Type is Int8) origname: cycle (Type is String) fullnamepath: /gt2r/cycle (Type is String) coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String) gt2r_qf_subsurf_anomaly[ /gt2r_delta_time= 0..5099] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Subsurface Anomaly Quality Flag (Type is String) description: The subsurface anomaly flag is defined as in atbd section 4.5.5.5 above. It is computed for each bin between 6 Stdev below the mean of the integrated model to 20m depth. The anomaly is set to 0 when bin value +<+3* subsurface mean plus s~sub~subsurface and set to 1 when subsurface bin value is other (meaning an anomaly exists) (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: unlikely_subsurface likely_subsurface (Type is String) flag_values: 0, 1 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 1 (Type is Int32) origname: qf_subsurf_anomaly (Type is String) fullnamepath: /gt2r/qf_subsurf_anomaly (Type is String) coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String) gt2r_subsurface_attenuation[ /gt2r_delta_time= 0..5099] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: 1 (Type is String) contentType: physicalMeasurement (Type is String) long_name: Subsurface Attenuation (Type is String) description: Subsurface attenuation coefficient. (Type is String) source: section 5.3.4 (A) (Type is String) origname: subsurface_attenuation (Type is String) fullnamepath: /gt2r/subsurface_attenuation (Type is String) coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String) gt2r_inland_water_body_region[ /gt2r_delta_time= 0..5099] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: referenceInformation (Type is String) long_name: Body Region (Type is String) description: ATL13-created shapefile representing relevant bodies of water over which to implement the ATL13 water surface finding algorithm only within a region of processing interest. (Type is String) source: section 5.3.1 (A) (Type is String) origname: inland_water_body_region (Type is String) fullnamepath: /gt2r/inland_water_body_region (Type is String) coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String) gt2r_ice_flag[ /gt2r_delta_time= 0..5099] (Type is Int8) attributes units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Ice Flag (Type is String) description: Flag indicating significant existence of ice on the water surface (Type is String) source: section 5.3.2 (D) (Type is String) flag_meanings: no_ice ice (Type is String) flag_values: 0, 1 (Type is Int8) valid_min: 0 (Type is Int8) valid_max: 1 (Type is Int8) origname: ice_flag (Type is String) fullnamepath: /gt2r/ice_flag (Type is String) coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String) gt2r_segment_lon[ /gt2r_delta_time= 0..5099] (Type is Float64) attributes units: degrees_east (Type is String) contentType: physicalMeasurement (Type is String) long_name: Longitude (Type is String) standard_name: longitude (Type is String) description: Longitude of reporting location (Type is String) source: section 5.3.5 (A) (Type is String) valid_min: -180.00000000000000 (Type is Float64) valid_max: 180.00000000000000 (Type is Float64) origname: segment_lon (Type is String) fullnamepath: /gt2r/segment_lon (Type is String) coordinates: gt2r_delta_time gt2r_segment_lat (Type is String) gt2r_ht_ortho[ /gt2r_delta_time= 0..5099] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: meters (Type is String) contentType: physicalMeasurement (Type is String) long_name: Orthometric Height (Type is String) description: Orthometric height converted from ellipsoidal height. (Type is String) source: section 5.3.5 (A) (Type is String) origname: ht_ortho (Type is String) fullnamepath: /gt2r/ht_ortho (Type is String) coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String) gt2r_segment_lat[ /gt2r_delta_time= 0..5099] (Type is Float64) attributes units: degrees_north (Type is String) contentType: physicalMeasurement (Type is String) long_name: Latitude (Type is String) standard_name: latitude (Type is String) description: Latitude of reporting location (Type is String) source: section 5.3.5 (A) (Type is String) valid_min: -90.000000000000000 (Type is Float64) valid_max: 90.000000000000000 (Type is Float64) origname: segment_lat (Type is String) fullnamepath: /gt2r/segment_lat (Type is String) coordinates: gt2r_delta_time gt2r_segment_lon (Type is String) gt2r_ht_water_surf[ /gt2r_delta_time= 0..5099] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: meters (Type is String) contentType: physicalMeasurement (Type is String) long_name: Water Surface Height (Type is String) description: Water surface height with reference to WGS84 ellipsoid (Type is String) source: section 5.3.5 (A) (Type is String) origname: ht_water_surf (Type is String) fullnamepath: /gt2r/ht_water_surf (Type is String) coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String) gt2r_err_ht_water_surf[ /gt2r_delta_time= 0..5099] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Height Error (Type is String) description: Error included in heights reported in ht_water_surf. (Type is String) source: section 5.3.3 (C) (Type is String) origname: err_ht_water_surf (Type is String) fullnamepath: /gt2r/err_ht_water_surf (Type is String) coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String) gt2r_atl13refid[ /gt2r_delta_time= 0..5099] (Type is Int64) attributes _FillValue: 0 (Type is Int64) units: 1 (Type is String) contentType: referenceInformation (Type is String) long_name: ATL13 Reference ID (Type is String) description: Unique aggregate reference number for each shape in the ATL13 Inland Water Body Mask, where digit 1 = type, digit 2 = size, digit 3 = source, and digits 4-10 = shape id (Type is String) source: ATL13 ATBD, Section 5.3.1 (C) (Type is String) origname: atl13refid (Type is String) fullnamepath: /gt2r/atl13refid (Type is String) coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String) gt2r_qf_cloud[ /gt2r_delta_time= 0..5099] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Consolidated cloud flag (Type is String) description: This flag is a combination of multiple flags (cloud_flag_atm, cloud_flag_asr, and bsnow_con) and takes daytime/nighttime into consideration. A value of 1 means clouds or blowing snow are likely present. A value of 0 indicates the likely absence of clouds or blowing snow. From the ATL09 data closest to the segment time. (Type is String) source: ATL09 (Type is String) flag_meanings: likely_clear likely_cloudy (Type is String) flag_values: 0, 1 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 1 (Type is Int32) origname: qf_cloud (Type is String) fullnamepath: /gt2r/qf_cloud (Type is String) coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String) gt2r_inland_water_body_source[ /gt2r_delta_time= 0..5099] (Type is Int8) attributes _FillValue: 127 (Type is Int8) units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Body Source (Type is String) description: Source of Inland Water Body shape, where 1=HydroLAKES, 2=Global Lakes and Wetlands Database, 3=Named Marine Water Bodies, 4=GSHHG Shoreline, 5=Reserved, 6=Reserved, 7=Reserved, 8=Reserved, 9=Reserved (Type is String) source: ATL13 ATBD, Section 5.3.1 (C) (Type is String) flag_meanings: HydroLAKES Global_Lakes_and_Wetlands_Database Named_Marine_Water_Bodies GSHHG_Shoreline Reserved Reserved Reserved Reserved Reserved (Type is String) flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 (Type is Int8) valid_min: 1 (Type is Int8) valid_max: 9 (Type is Int8) origname: inland_water_body_source (Type is String) fullnamepath: /gt2r/inland_water_body_source (Type is String) coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String) gt2r_inland_water_body_size[ /gt2r_delta_time= 0..5099] (Type is Int8) attributes _FillValue: 127 (Type is Int8) units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Body Size (Type is String) description: Size of Inland Water Body, A=area, where 1=A>10,000 km2, 2=10,000>A>=1,000, 3=1,000>A>=100, 4=100>A>=10, 5=10>A>=1, 6=1>A>=0.1, 7=0.01>A, 8=Reserved, 9=Reserved (Type is String) source: ATL13 ATBD, Section 5.3.1 (C) (Type is String) flag_meanings: A>10000 10000>A>=1000 1000>A>=100 100>A>=10 10>A>=1 1>A>=0.1 0.01>A Reserved Reserved (Type is String) flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 (Type is Int8) valid_min: 1 (Type is Int8) valid_max: 9 (Type is Int8) origname: inland_water_body_size (Type is String) fullnamepath: /gt2r/inland_water_body_size (Type is String) coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String) gt2r_err_slope_trk[ /gt2r_delta_time= 0..5099] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Slope Error (Type is String) description: Error included in segment_slope_trk_local. (Type is String) source: section 5.3.3 (C) (Type is String) origname: err_slope_trk (Type is String) fullnamepath: /gt2r/err_slope_trk (Type is String) coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String) gt2r_segment_slope_trk_bdy[ /gt2r_delta_time= 0..5099] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: 1 (Type is String) contentType: physicalMeasurement (Type is String) long_name: Water Body Slope (Type is String) description: Along track water body surface slope. (Type is String) source: section 5.3.5 (A) (Type is String) origname: segment_slope_trk_bdy (Type is String) fullnamepath: /gt2r/segment_slope_trk_bdy (Type is String) coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String) gt2r_sseg_mean_lat[ /gt2r_delta_time= 0..5099] (Type is Float64) attributes _FillValue: 1.7976931348623157e+308 (Type is Float64) units: degrees_north (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Short Segment Mean Latitude (Type is String) description: Mean latitude of the signal-qualified photons in a short segment. (Type is String) source: Inland Water ATBD (Type is String) valid_min: -90.000000000000000 (Type is Float64) valid_max: 90.000000000000000 (Type is Float64) origname: sseg_mean_lat (Type is String) fullnamepath: /gt2r/sseg_mean_lat (Type is String) coordinates: gt2r_delta_time (Type is String) gt2r_qf_spec_width[ /gt2r_delta_time= 0..5099] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Spectral Width Flag (Type is String) description: The Spectral Width flag is set based on threshold checks for the estimated Spectral Width. The flag is set as follows: 0 if spec_width < 0.5; 1 if spec_width >= +0.5. (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: below_0.5 above_0.5 (Type is String) flag_values: 0, 1 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 1 (Type is Int32) origname: qf_spec_width (Type is String) fullnamepath: /gt2r/qf_spec_width (Type is String) coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String) gt2r_qf_bckgrd[ /gt2r_delta_time= 0..5099] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Background Quality Flag (Type is String) description: Describes the degree of background photons present in each short segment. bckgrd_dnsty_threshold1= 0.001 (counts per bi per Lseg); bckgrd_dnsty_threshold2= 0.01 (counts per bin per Lseg); bckgrd_dnsty_threshold3= 0.05 (counts per bin per Lseg); bckgrd_dnsty_threshold4= 0.1 (counts per bin per Lseg); bckgrd_dnsty_threshold5= 0.3 (counts per bin per Lseg); bckgrd_dnsty_threshold6= 0.5 (counts per bin per Lseg) (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: equal_to_or_below_threshold1 equal_to_or_below_threshold2 equal_to_or_below_threshold3 equal_to_or_below_threshold4 equal_to_or_below_threshold5 equal_to_or_below_threshold6 above_threshold6 (Type is String) flag_values: 0, 1, 2, 3, 4, 5, 6 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 6 (Type is Int32) origname: qf_bckgrd (Type is String) fullnamepath: /gt2r/qf_bckgrd (Type is String) coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon (Type is String) gt2r_sseg_mean_time[ /gt2r_delta_time= 0..5099] (Type is Float64) attributes contentType: auxiliaryInformation (Type is String) long_name: Short Segment Mean Time (Type is String) description: Mean time of the signal-qualified photons in a short segment. (Type is String) source: Inland Water ATBD (Type is String) _FillValue: 1.7976931348623157e+308 (Type is Float64) units: Seconds since 2018-01-01 (Type is String) origname: sseg_mean_time (Type is String) fullnamepath: /gt2r/sseg_mean_time (Type is String) coordinates: gt2r_delta_time (Type is String) gt1l_rgt[ /gt1l_delta_time= 0..20075] (Type is Int16) attributes units: 1 (Type is String) contentType: referenceInformation (Type is String) long_name: Reference Ground track (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 is String) source: ATL03 (Type is String) valid_min: 1 (Type is Int16) valid_max: 1387 (Type is Int16) origname: rgt (Type is String) fullnamepath: /gt1l/rgt (Type is String) coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String) gt1l_qf_bias_fit[ /gt1l_delta_time= 0..20075] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Height Bias Fit Quality Flag (Type is String) description: The height bias fit flag is set based on the value of the goodness of fit bias estimated as the difference between the centroid elevations of the observed surface water histogram and fitted integrated water surface model histogram. The flag values are set as follows: = -3 if H_bias_fit < -0.10 (m); -2 if -0.10 <= H_bias_fit < -0.05;-1 when -0.05 <= H_bias_fit < -0.01; 0 if -0.01 <= H_bias_fit < 0.01 (m); 1 if 0.01 <= H_bias_fit < 0.05; 2 if 0.05 < H_bias_fit < 0.10; 3 if 0.10 <= H_bias_fit; 4 if H_bias_fit is invalid. (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 equal_to_or_above_threshold6 invalid (Type is String) flag_values: -3, -2, -1, 0, 1, 2, 3, 4 (Type is Int32) valid_min: -3 (Type is Int32) valid_max: 4 (Type is Int32) origname: qf_bias_fit (Type is String) fullnamepath: /gt1l/qf_bias_fit (Type is String) coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String) gt1l_sseg_mean_lon[ /gt1l_delta_time= 0..20075] (Type is Float64) attributes units: degrees_east (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Short Segment Mean Longitude (Type is String) description: Mean longitude of the signal-qualified photons in a short segment. (Type is String) source: Inland Water ATBD (Type is String) valid_min: -180.00000000000000 (Type is Float64) valid_max: 180.00000000000000 (Type is Float64) origname: sseg_mean_lon (Type is String) fullnamepath: /gt1l/sseg_mean_lon (Type is String) coordinates: gt1l_delta_time (Type is String) gt1l_qf_ice[ /gt1l_delta_time= 0..20075] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Ice Quality Flag (Type is String) description: The quality flag for ice describes the likelihood of ice on the short water body surface segment. 0 for QF_Bckgrd<= 2; 1 for 2 < QF_Bckgrd<= 4; 2 for 4 < QF_Bckgrd; 3 for (4 < QF_Bckgrd and QF_Cloud=1) (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: qf_bckgrd_le_2 qf_bckgrd_le_4 qf_bckgrd_gt_4 qf_bckgrd_w_cloud (Type is String) flag_values: 0, 1, 2, 3 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 3 (Type is Int32) origname: qf_ice (Type is String) fullnamepath: /gt1l/qf_ice (Type is String) coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String) gt1l_inland_water_body_type[ /gt1l_delta_time= 0..20075] (Type is Int8) attributes _FillValue: 127 (Type is Int8) units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Body Type (Type is String) description: Type of Inland Water Body, where 1=Lake, 2=Known Reservoir, 3=(Reserved for future use), 4=Ephemeral Water, 5=River, 6=Estuary or Bay, 7=Coastal Water, 8=Reserved, 9=Reserved (Type is String) source: ATL13 ATBD, Section 5.3.1 (C) (Type is String) flag_meanings: Lake Known_Reservoir Reserved_for_future_use Ephemeral_Water River Estuary_or_Bay Coastal_Water Reserved Reserved (Type is String) flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 (Type is Int8) valid_min: 1 (Type is Int8) valid_max: 9 (Type is Int8) origname: inland_water_body_type (Type is String) fullnamepath: /gt1l/inland_water_body_type (Type is String) coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String) gt1l_inland_water_body_id[ /gt1l_delta_time= 0..20075] (Type is Int32) attributes contentType: referenceInformation (Type is String) long_name: Body ID (Type is String) description: Identifying signature of an individual inland water body. Each body of water is represented by a unique numeric value. (Type is String) source: ATL13 ATBD, Section 5.3.1 (C) (Type is String) _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) origname: inland_water_body_id (Type is String) fullnamepath: /gt1l/inland_water_body_id (Type is String) coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String) gt1l_segment_geoid[ /gt1l_delta_time= 0..20075] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: meters (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Segment Geoid (Type is String) description: Applicable geoid value at reporting location for all short segment statistics. (Type is String) source: ATL03 (Type is String) origname: segment_geoid (Type is String) fullnamepath: /gt1l/segment_geoid (Type is String) coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String) gt1l_qf_sseg_length[ /gt1l_delta_time= 0..20075] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Short Segment Length flag (Type is String) description: The Short Segment Length flag is set based on the length of the short segment. The flag is set as follows: 0 if sseg_length< 50 (meters); 1 if 50 <sseg_length < 150 (meters); 2 if 150 < sseg_length< 300 (meters); 3 if 300 < sseg_length. (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: below_threshold1 below_threshold2 below_threshold3 above_threshold4 (Type is String) flag_values: 0, 1, 2, 3 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 3 (Type is Int32) origname: qf_sseg_length (Type is String) fullnamepath: /gt1l/qf_sseg_length (Type is String) coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String) gt1l_qf_lseg_length[ /gt1l_delta_time= 0..20075] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Long Segment Length flag (Type is String) description: The Long Segment Length flag is set based on the length of the long segment. The flag is set as follows: 0 if Lseg_length < 500 (meters); 1 if 50 <= Lseg_length < 1500 (meters); 2 if 150 <= Lseg_length < 3000 (meters); 3 if 3000 <= Lseg_length (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: below_threshold1 below_threshold2 below_threshold3 above_threshold4 (Type is String) flag_values: 0, 1, 2, 3 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 3 (Type is Int32) origname: qf_lseg_length (Type is String) fullnamepath: /gt1l/qf_lseg_length (Type is String) coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String) gt1l_significant_wave_ht[ /gt1l_delta_time= 0..20075] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: meters (Type is String) contentType: physicalMeasurement (Type is String) long_name: SWH (Type is String) description: Significant wave height (Type is String) source: section 5.3.3 (C) (Type is String) origname: significant_wave_ht (Type is String) fullnamepath: /gt1l/significant_wave_ht (Type is String) coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String) gt1l_qf_bias_em[ /gt1l_delta_time= 0..20075] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: EM Bias Quality Flag (Type is String) description: The Electromagnetic Bias flag is set based on threshold checks for the estimated electromagnetic height bias. The flag is set as follows: -3 if H_bias_EM < -0.10 (m); -2 if -0.10 < H_bias_EM < -0.05; -1 if -0.05 <= H_bias_EM < -0.01; 0 if -0.01 <= H_bias_EM < 0.01 (m); 1 if 0.01 <= H_bias_EM < 0.05; 2 if 0.05 <= H_bias_EM < 0.10; 3 if 0.10 < H_bias_EM; 4 if H_bias_EM is invalid. (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 above_threshold6 invalid (Type is String) flag_values: -3, -2, -1, 0, 1, 2, 3, 4 (Type is Int32) valid_min: -3 (Type is Int32) valid_max: 4 (Type is Int32) origname: qf_bias_em (Type is String) fullnamepath: /gt1l/qf_bias_em (Type is String) coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String) gt1l_segment_id_end[ /gt1l_delta_time= 0..20075] (Type is Int32) attributes units: 1 (Type is String) contentType: referenceInformation (Type is String) long_name: Last ATL03 Segment ID (Type is String) description: Last ATL03 segment_id associated with the photons within this inland water segment. (Type is String) source: ATL03 (Type is String) origname: segment_id_end (Type is String) fullnamepath: /gt1l/segment_id_end (Type is String) coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String) gt1l_stdev_water_surf[ /gt1l_delta_time= 0..20075] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: meters (Type is String) contentType: referenceInformation (Type is String) long_name: Surface StDev (Type is String) description: Standard deviation of water surface, calculated over long segments with result reported at each short segment location tag contained within. (Type is String) source: section 5.3.3 (C) (Type is String) origname: stdev_water_surf (Type is String) fullnamepath: /gt1l/stdev_water_surf (Type is String) coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String) gt1l_qf_iwp[ /gt1l_delta_time= 0..20075] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) contentType: qualityInformation (Type is String) long_name: Inland Water Segment Processing Flag (Type is String) description: Inland Water segment Processing (IWP) flag to describe the level of processing the inland water algorithm was able to perform on each short segment based on the data available, ranging from 1 to 7. (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: 1_short_segment 2_short_segments 3_to_5_short_segments 6_to_7_short_segments 8_to_9_short_segments 10_to_29_short_segments 30_or_more_short_segments_analyzed (Type is String) flag_values: 1, 2, 3, 4, 5, 6, 7 (Type is Int32) valid_min: 1 (Type is Int32) valid_max: 7 (Type is Int32) origname: qf_iwp (Type is String) fullnamepath: /gt1l/qf_iwp (Type is String) coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String) gt1l_segment_id_beg[ /gt1l_delta_time= 0..20075] (Type is Int32) attributes units: 1 (Type is String) contentType: referenceInformation (Type is String) long_name: First ATL03 Segment ID (Type is String) description: First ATL03 segment_id associated with the photons within this inland water segment. (Type is String) source: ATL03 (Type is String) origname: segment_id_beg (Type is String) fullnamepath: /gt1l/segment_id_beg (Type is String) coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String) gt1l_cycle[ /gt1l_delta_time= 0..20075] (Type is Int8) attributes units: counts (Type is String) contentType: referenceInformation (Type is String) long_name: Cycle Number (Type is String) description: Tracks the number of 91-day cycles in the mission, beginning with 01. (Type is String) source: ATL03 (Type is String) valid_min: 0 (Type is Int8) valid_max: 50 (Type is Int8) origname: cycle (Type is String) fullnamepath: /gt1l/cycle (Type is String) coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String) gt1l_qf_subsurf_anomaly[ /gt1l_delta_time= 0..20075] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Subsurface Anomaly Quality Flag (Type is String) description: The subsurface anomaly flag is defined as in atbd section 4.5.5.5 above. It is computed for each bin between 6 Stdev below the mean of the integrated model to 20m depth. The anomaly is set to 0 when bin value +<+3* subsurface mean plus s~sub~subsurface and set to 1 when subsurface bin value is other (meaning an anomaly exists) (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: unlikely_subsurface likely_subsurface (Type is String) flag_values: 0, 1 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 1 (Type is Int32) origname: qf_subsurf_anomaly (Type is String) fullnamepath: /gt1l/qf_subsurf_anomaly (Type is String) coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String) gt1l_subsurface_attenuation[ /gt1l_delta_time= 0..20075] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: 1 (Type is String) contentType: physicalMeasurement (Type is String) long_name: Subsurface Attenuation (Type is String) description: Subsurface attenuation coefficient. (Type is String) source: section 5.3.4 (A) (Type is String) origname: subsurface_attenuation (Type is String) fullnamepath: /gt1l/subsurface_attenuation (Type is String) coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String) gt1l_inland_water_body_region[ /gt1l_delta_time= 0..20075] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: referenceInformation (Type is String) long_name: Body Region (Type is String) description: ATL13-created shapefile representing relevant bodies of water over which to implement the ATL13 water surface finding algorithm only within a region of processing interest. (Type is String) source: section 5.3.1 (A) (Type is String) origname: inland_water_body_region (Type is String) fullnamepath: /gt1l/inland_water_body_region (Type is String) coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String) gt1l_ice_flag[ /gt1l_delta_time= 0..20075] (Type is Int8) attributes units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Ice Flag (Type is String) description: Flag indicating significant existence of ice on the water surface (Type is String) source: section 5.3.2 (D) (Type is String) flag_meanings: no_ice ice (Type is String) flag_values: 0, 1 (Type is Int8) valid_min: 0 (Type is Int8) valid_max: 1 (Type is Int8) origname: ice_flag (Type is String) fullnamepath: /gt1l/ice_flag (Type is String) coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String) gt1l_segment_lon[ /gt1l_delta_time= 0..20075] (Type is Float64) attributes units: degrees_east (Type is String) contentType: physicalMeasurement (Type is String) long_name: Longitude (Type is String) standard_name: longitude (Type is String) description: Longitude of reporting location (Type is String) source: section 5.3.5 (A) (Type is String) valid_min: -180.00000000000000 (Type is Float64) valid_max: 180.00000000000000 (Type is Float64) origname: segment_lon (Type is String) fullnamepath: /gt1l/segment_lon (Type is String) coordinates: gt1l_delta_time gt1l_segment_lat (Type is String) gt1l_ht_ortho[ /gt1l_delta_time= 0..20075] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: meters (Type is String) contentType: physicalMeasurement (Type is String) long_name: Orthometric Height (Type is String) description: Orthometric height converted from ellipsoidal height. (Type is String) source: section 5.3.5 (A) (Type is String) origname: ht_ortho (Type is String) fullnamepath: /gt1l/ht_ortho (Type is String) coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String) gt1l_segment_lat[ /gt1l_delta_time= 0..20075] (Type is Float64) attributes units: degrees_north (Type is String) contentType: physicalMeasurement (Type is String) long_name: Latitude (Type is String) standard_name: latitude (Type is String) description: Latitude of reporting location (Type is String) source: section 5.3.5 (A) (Type is String) valid_min: -90.000000000000000 (Type is Float64) valid_max: 90.000000000000000 (Type is Float64) origname: segment_lat (Type is String) fullnamepath: /gt1l/segment_lat (Type is String) coordinates: gt1l_delta_time gt1l_segment_lon (Type is String) gt1l_ht_water_surf[ /gt1l_delta_time= 0..20075] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: meters (Type is String) contentType: physicalMeasurement (Type is String) long_name: Water Surface Height (Type is String) description: Water surface height with reference to WGS84 ellipsoid (Type is String) source: section 5.3.5 (A) (Type is String) origname: ht_water_surf (Type is String) fullnamepath: /gt1l/ht_water_surf (Type is String) coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String) gt1l_err_ht_water_surf[ /gt1l_delta_time= 0..20075] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Height Error (Type is String) description: Error included in heights reported in ht_water_surf. (Type is String) source: section 5.3.3 (C) (Type is String) origname: err_ht_water_surf (Type is String) fullnamepath: /gt1l/err_ht_water_surf (Type is String) coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String) gt1l_atl13refid[ /gt1l_delta_time= 0..20075] (Type is Int64) attributes _FillValue: 0 (Type is Int64) units: 1 (Type is String) contentType: referenceInformation (Type is String) long_name: ATL13 Reference ID (Type is String) description: Unique aggregate reference number for each shape in the ATL13 Inland Water Body Mask, where digit 1 = type, digit 2 = size, digit 3 = source, and digits 4-10 = shape id (Type is String) source: ATL13 ATBD, Section 5.3.1 (C) (Type is String) origname: atl13refid (Type is String) fullnamepath: /gt1l/atl13refid (Type is String) coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String) gt1l_qf_cloud[ /gt1l_delta_time= 0..20075] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Consolidated cloud flag (Type is String) description: This flag is a combination of multiple flags (cloud_flag_atm, cloud_flag_asr, and bsnow_con) and takes daytime/nighttime into consideration. A value of 1 means clouds or blowing snow are likely present. A value of 0 indicates the likely absence of clouds or blowing snow. From the ATL09 data closest to the segment time. (Type is String) source: ATL09 (Type is String) flag_meanings: likely_clear likely_cloudy (Type is String) flag_values: 0, 1 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 1 (Type is Int32) origname: qf_cloud (Type is String) fullnamepath: /gt1l/qf_cloud (Type is String) coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String) gt1l_inland_water_body_source[ /gt1l_delta_time= 0..20075] (Type is Int8) attributes _FillValue: 127 (Type is Int8) units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Body Source (Type is String) description: Source of Inland Water Body shape, where 1=HydroLAKES, 2=Global Lakes and Wetlands Database, 3=Named Marine Water Bodies, 4=GSHHG Shoreline, 5=Reserved, 6=Reserved, 7=Reserved, 8=Reserved, 9=Reserved (Type is String) source: ATL13 ATBD, Section 5.3.1 (C) (Type is String) flag_meanings: HydroLAKES Global_Lakes_and_Wetlands_Database Named_Marine_Water_Bodies GSHHG_Shoreline Reserved Reserved Reserved Reserved Reserved (Type is String) flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 (Type is Int8) valid_min: 1 (Type is Int8) valid_max: 9 (Type is Int8) origname: inland_water_body_source (Type is String) fullnamepath: /gt1l/inland_water_body_source (Type is String) coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String) gt1l_inland_water_body_size[ /gt1l_delta_time= 0..20075] (Type is Int8) attributes _FillValue: 127 (Type is Int8) units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Body Size (Type is String) description: Size of Inland Water Body, A=area, where 1=A>10,000 km2, 2=10,000>A>=1,000, 3=1,000>A>=100, 4=100>A>=10, 5=10>A>=1, 6=1>A>=0.1, 7=0.01>A, 8=Reserved, 9=Reserved (Type is String) source: ATL13 ATBD, Section 5.3.1 (C) (Type is String) flag_meanings: A>10000 10000>A>=1000 1000>A>=100 100>A>=10 10>A>=1 1>A>=0.1 0.01>A Reserved Reserved (Type is String) flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 (Type is Int8) valid_min: 1 (Type is Int8) valid_max: 9 (Type is Int8) origname: inland_water_body_size (Type is String) fullnamepath: /gt1l/inland_water_body_size (Type is String) coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String) gt1l_err_slope_trk[ /gt1l_delta_time= 0..20075] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Slope Error (Type is String) description: Error included in segment_slope_trk_local. (Type is String) source: section 5.3.3 (C) (Type is String) origname: err_slope_trk (Type is String) fullnamepath: /gt1l/err_slope_trk (Type is String) coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String) gt1l_segment_slope_trk_bdy[ /gt1l_delta_time= 0..20075] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: 1 (Type is String) contentType: physicalMeasurement (Type is String) long_name: Water Body Slope (Type is String) description: Along track water body surface slope. (Type is String) source: section 5.3.5 (A) (Type is String) origname: segment_slope_trk_bdy (Type is String) fullnamepath: /gt1l/segment_slope_trk_bdy (Type is String) coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String) gt1l_sseg_mean_lat[ /gt1l_delta_time= 0..20075] (Type is Float64) attributes _FillValue: 1.7976931348623157e+308 (Type is Float64) units: degrees_north (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Short Segment Mean Latitude (Type is String) description: Mean latitude of the signal-qualified photons in a short segment. (Type is String) source: Inland Water ATBD (Type is String) valid_min: -90.000000000000000 (Type is Float64) valid_max: 90.000000000000000 (Type is Float64) origname: sseg_mean_lat (Type is String) fullnamepath: /gt1l/sseg_mean_lat (Type is String) coordinates: gt1l_delta_time (Type is String) gt1l_qf_spec_width[ /gt1l_delta_time= 0..20075] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Spectral Width Flag (Type is String) description: The Spectral Width flag is set based on threshold checks for the estimated Spectral Width. The flag is set as follows: 0 if spec_width < 0.5; 1 if spec_width >= +0.5. (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: below_0.5 above_0.5 (Type is String) flag_values: 0, 1 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 1 (Type is Int32) origname: qf_spec_width (Type is String) fullnamepath: /gt1l/qf_spec_width (Type is String) coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String) gt1l_qf_bckgrd[ /gt1l_delta_time= 0..20075] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Background Quality Flag (Type is String) description: Describes the degree of background photons present in each short segment. bckgrd_dnsty_threshold1= 0.001 (counts per bi per Lseg); bckgrd_dnsty_threshold2= 0.01 (counts per bin per Lseg); bckgrd_dnsty_threshold3= 0.05 (counts per bin per Lseg); bckgrd_dnsty_threshold4= 0.1 (counts per bin per Lseg); bckgrd_dnsty_threshold5= 0.3 (counts per bin per Lseg); bckgrd_dnsty_threshold6= 0.5 (counts per bin per Lseg) (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: equal_to_or_below_threshold1 equal_to_or_below_threshold2 equal_to_or_below_threshold3 equal_to_or_below_threshold4 equal_to_or_below_threshold5 equal_to_or_below_threshold6 above_threshold6 (Type is String) flag_values: 0, 1, 2, 3, 4, 5, 6 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 6 (Type is Int32) origname: qf_bckgrd (Type is String) fullnamepath: /gt1l/qf_bckgrd (Type is String) coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon (Type is String) gt1l_sseg_mean_time[ /gt1l_delta_time= 0..20075] (Type is Float64) attributes contentType: auxiliaryInformation (Type is String) long_name: Short Segment Mean Time (Type is String) description: Mean time of the signal-qualified photons in a short segment. (Type is String) source: Inland Water ATBD (Type is String) _FillValue: 1.7976931348623157e+308 (Type is Float64) units: Seconds since 2018-01-01 (Type is String) origname: sseg_mean_time (Type is String) fullnamepath: /gt1l/sseg_mean_time (Type is String) coordinates: gt1l_delta_time (Type is String) quality_assessment_qa_granule_fail_reason[ /FakeDim0= 0..0] (Type is Int32) attributes units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Granule Failure Reason (Type is String) description: Flag indicating granule failure reason. 0=no failure; 1=processing failure; 2=insufficient data; 3=TBD3; 4=TBD4; 5=TBD5 (Type is String) source: Operations (Type is String) flag_meanings: no_failure processing_failure insufficient_data TBD3 TBD4 TBD5 (Type is String) flag_values: 0, 1, 2, 3, 4, 5 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 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 units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Granule Pass Flag (Type is String) description: Flag indicating granule quality. 0=granule passes automatic QA. 1=granule fails automatic QA. (Type is String) source: Operations (Type is String) flag_meanings: PASS FAIL (Type is String) flag_values: 0, 1 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 1 (Type is Int32) origname: qa_granule_pass_fail (Type is String) fullnamepath: /quality_assessment/qa_granule_pass_fail (Type is String) gt3l_rgt[ /gt3l_delta_time= 0..20712] (Type is Int16) attributes units: 1 (Type is String) contentType: referenceInformation (Type is String) long_name: Reference Ground track (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 is String) source: ATL03 (Type is String) valid_min: 1 (Type is Int16) valid_max: 1387 (Type is Int16) origname: rgt (Type is String) fullnamepath: /gt3l/rgt (Type is String) coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String) gt3l_qf_bias_fit[ /gt3l_delta_time= 0..20712] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Height Bias Fit Quality Flag (Type is String) description: The height bias fit flag is set based on the value of the goodness of fit bias estimated as the difference between the centroid elevations of the observed surface water histogram and fitted integrated water surface model histogram. The flag values are set as follows: = -3 if H_bias_fit < -0.10 (m); -2 if -0.10 <= H_bias_fit < -0.05;-1 when -0.05 <= H_bias_fit < -0.01; 0 if -0.01 <= H_bias_fit < 0.01 (m); 1 if 0.01 <= H_bias_fit < 0.05; 2 if 0.05 < H_bias_fit < 0.10; 3 if 0.10 <= H_bias_fit; 4 if H_bias_fit is invalid. (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 equal_to_or_above_threshold6 invalid (Type is String) flag_values: -3, -2, -1, 0, 1, 2, 3, 4 (Type is Int32) valid_min: -3 (Type is Int32) valid_max: 4 (Type is Int32) origname: qf_bias_fit (Type is String) fullnamepath: /gt3l/qf_bias_fit (Type is String) coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String) gt3l_sseg_mean_lon[ /gt3l_delta_time= 0..20712] (Type is Float64) attributes units: degrees_east (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Short Segment Mean Longitude (Type is String) description: Mean longitude of the signal-qualified photons in a short segment. (Type is String) source: Inland Water ATBD (Type is String) valid_min: -180.00000000000000 (Type is Float64) valid_max: 180.00000000000000 (Type is Float64) origname: sseg_mean_lon (Type is String) fullnamepath: /gt3l/sseg_mean_lon (Type is String) coordinates: gt3l_delta_time (Type is String) gt3l_qf_ice[ /gt3l_delta_time= 0..20712] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Ice Quality Flag (Type is String) description: The quality flag for ice describes the likelihood of ice on the short water body surface segment. 0 for QF_Bckgrd<= 2; 1 for 2 < QF_Bckgrd<= 4; 2 for 4 < QF_Bckgrd; 3 for (4 < QF_Bckgrd and QF_Cloud=1) (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: qf_bckgrd_le_2 qf_bckgrd_le_4 qf_bckgrd_gt_4 qf_bckgrd_w_cloud (Type is String) flag_values: 0, 1, 2, 3 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 3 (Type is Int32) origname: qf_ice (Type is String) fullnamepath: /gt3l/qf_ice (Type is String) coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String) gt3l_inland_water_body_type[ /gt3l_delta_time= 0..20712] (Type is Int8) attributes _FillValue: 127 (Type is Int8) units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Body Type (Type is String) description: Type of Inland Water Body, where 1=Lake, 2=Known Reservoir, 3=(Reserved for future use), 4=Ephemeral Water, 5=River, 6=Estuary or Bay, 7=Coastal Water, 8=Reserved, 9=Reserved (Type is String) source: ATL13 ATBD, Section 5.3.1 (C) (Type is String) flag_meanings: Lake Known_Reservoir Reserved_for_future_use Ephemeral_Water River Estuary_or_Bay Coastal_Water Reserved Reserved (Type is String) flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 (Type is Int8) valid_min: 1 (Type is Int8) valid_max: 9 (Type is Int8) origname: inland_water_body_type (Type is String) fullnamepath: /gt3l/inland_water_body_type (Type is String) coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String) gt3l_inland_water_body_id[ /gt3l_delta_time= 0..20712] (Type is Int32) attributes contentType: referenceInformation (Type is String) long_name: Body ID (Type is String) description: Identifying signature of an individual inland water body. Each body of water is represented by a unique numeric value. (Type is String) source: ATL13 ATBD, Section 5.3.1 (C) (Type is String) _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) origname: inland_water_body_id (Type is String) fullnamepath: /gt3l/inland_water_body_id (Type is String) coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String) gt3l_segment_geoid[ /gt3l_delta_time= 0..20712] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: meters (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Segment Geoid (Type is String) description: Applicable geoid value at reporting location for all short segment statistics. (Type is String) source: ATL03 (Type is String) origname: segment_geoid (Type is String) fullnamepath: /gt3l/segment_geoid (Type is String) coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String) gt3l_qf_sseg_length[ /gt3l_delta_time= 0..20712] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Short Segment Length flag (Type is String) description: The Short Segment Length flag is set based on the length of the short segment. The flag is set as follows: 0 if sseg_length< 50 (meters); 1 if 50 <sseg_length < 150 (meters); 2 if 150 < sseg_length< 300 (meters); 3 if 300 < sseg_length. (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: below_threshold1 below_threshold2 below_threshold3 above_threshold4 (Type is String) flag_values: 0, 1, 2, 3 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 3 (Type is Int32) origname: qf_sseg_length (Type is String) fullnamepath: /gt3l/qf_sseg_length (Type is String) coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String) gt3l_qf_lseg_length[ /gt3l_delta_time= 0..20712] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Long Segment Length flag (Type is String) description: The Long Segment Length flag is set based on the length of the long segment. The flag is set as follows: 0 if Lseg_length < 500 (meters); 1 if 50 <= Lseg_length < 1500 (meters); 2 if 150 <= Lseg_length < 3000 (meters); 3 if 3000 <= Lseg_length (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: below_threshold1 below_threshold2 below_threshold3 above_threshold4 (Type is String) flag_values: 0, 1, 2, 3 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 3 (Type is Int32) origname: qf_lseg_length (Type is String) fullnamepath: /gt3l/qf_lseg_length (Type is String) coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String) gt3l_significant_wave_ht[ /gt3l_delta_time= 0..20712] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: meters (Type is String) contentType: physicalMeasurement (Type is String) long_name: SWH (Type is String) description: Significant wave height (Type is String) source: section 5.3.3 (C) (Type is String) origname: significant_wave_ht (Type is String) fullnamepath: /gt3l/significant_wave_ht (Type is String) coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String) gt3l_qf_bias_em[ /gt3l_delta_time= 0..20712] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: EM Bias Quality Flag (Type is String) description: The Electromagnetic Bias flag is set based on threshold checks for the estimated electromagnetic height bias. The flag is set as follows: -3 if H_bias_EM < -0.10 (m); -2 if -0.10 < H_bias_EM < -0.05; -1 if -0.05 <= H_bias_EM < -0.01; 0 if -0.01 <= H_bias_EM < 0.01 (m); 1 if 0.01 <= H_bias_EM < 0.05; 2 if 0.05 <= H_bias_EM < 0.10; 3 if 0.10 < H_bias_EM; 4 if H_bias_EM is invalid. (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 above_threshold6 invalid (Type is String) flag_values: -3, -2, -1, 0, 1, 2, 3, 4 (Type is Int32) valid_min: -3 (Type is Int32) valid_max: 4 (Type is Int32) origname: qf_bias_em (Type is String) fullnamepath: /gt3l/qf_bias_em (Type is String) coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String) gt3l_segment_id_end[ /gt3l_delta_time= 0..20712] (Type is Int32) attributes units: 1 (Type is String) contentType: referenceInformation (Type is String) long_name: Last ATL03 Segment ID (Type is String) description: Last ATL03 segment_id associated with the photons within this inland water segment. (Type is String) source: ATL03 (Type is String) origname: segment_id_end (Type is String) fullnamepath: /gt3l/segment_id_end (Type is String) coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String) gt3l_stdev_water_surf[ /gt3l_delta_time= 0..20712] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: meters (Type is String) contentType: referenceInformation (Type is String) long_name: Surface StDev (Type is String) description: Standard deviation of water surface, calculated over long segments with result reported at each short segment location tag contained within. (Type is String) source: section 5.3.3 (C) (Type is String) origname: stdev_water_surf (Type is String) fullnamepath: /gt3l/stdev_water_surf (Type is String) coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String) gt3l_qf_iwp[ /gt3l_delta_time= 0..20712] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) contentType: qualityInformation (Type is String) long_name: Inland Water Segment Processing Flag (Type is String) description: Inland Water segment Processing (IWP) flag to describe the level of processing the inland water algorithm was able to perform on each short segment based on the data available, ranging from 1 to 7. (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: 1_short_segment 2_short_segments 3_to_5_short_segments 6_to_7_short_segments 8_to_9_short_segments 10_to_29_short_segments 30_or_more_short_segments_analyzed (Type is String) flag_values: 1, 2, 3, 4, 5, 6, 7 (Type is Int32) valid_min: 1 (Type is Int32) valid_max: 7 (Type is Int32) origname: qf_iwp (Type is String) fullnamepath: /gt3l/qf_iwp (Type is String) coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String) gt3l_segment_id_beg[ /gt3l_delta_time= 0..20712] (Type is Int32) attributes units: 1 (Type is String) contentType: referenceInformation (Type is String) long_name: First ATL03 Segment ID (Type is String) description: First ATL03 segment_id associated with the photons within this inland water segment. (Type is String) source: ATL03 (Type is String) origname: segment_id_beg (Type is String) fullnamepath: /gt3l/segment_id_beg (Type is String) coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String) gt3l_cycle[ /gt3l_delta_time= 0..20712] (Type is Int8) attributes units: counts (Type is String) contentType: referenceInformation (Type is String) long_name: Cycle Number (Type is String) description: Tracks the number of 91-day cycles in the mission, beginning with 01. (Type is String) source: ATL03 (Type is String) valid_min: 0 (Type is Int8) valid_max: 50 (Type is Int8) origname: cycle (Type is String) fullnamepath: /gt3l/cycle (Type is String) coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String) gt3l_qf_subsurf_anomaly[ /gt3l_delta_time= 0..20712] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Subsurface Anomaly Quality Flag (Type is String) description: The subsurface anomaly flag is defined as in atbd section 4.5.5.5 above. It is computed for each bin between 6 Stdev below the mean of the integrated model to 20m depth. The anomaly is set to 0 when bin value +<+3* subsurface mean plus s~sub~subsurface and set to 1 when subsurface bin value is other (meaning an anomaly exists) (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: unlikely_subsurface likely_subsurface (Type is String) flag_values: 0, 1 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 1 (Type is Int32) origname: qf_subsurf_anomaly (Type is String) fullnamepath: /gt3l/qf_subsurf_anomaly (Type is String) coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String) gt3l_subsurface_attenuation[ /gt3l_delta_time= 0..20712] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: 1 (Type is String) contentType: physicalMeasurement (Type is String) long_name: Subsurface Attenuation (Type is String) description: Subsurface attenuation coefficient. (Type is String) source: section 5.3.4 (A) (Type is String) origname: subsurface_attenuation (Type is String) fullnamepath: /gt3l/subsurface_attenuation (Type is String) coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String) gt3l_inland_water_body_region[ /gt3l_delta_time= 0..20712] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: referenceInformation (Type is String) long_name: Body Region (Type is String) description: ATL13-created shapefile representing relevant bodies of water over which to implement the ATL13 water surface finding algorithm only within a region of processing interest. (Type is String) source: section 5.3.1 (A) (Type is String) origname: inland_water_body_region (Type is String) fullnamepath: /gt3l/inland_water_body_region (Type is String) coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String) gt3l_ice_flag[ /gt3l_delta_time= 0..20712] (Type is Int8) attributes units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Ice Flag (Type is String) description: Flag indicating significant existence of ice on the water surface (Type is String) source: section 5.3.2 (D) (Type is String) flag_meanings: no_ice ice (Type is String) flag_values: 0, 1 (Type is Int8) valid_min: 0 (Type is Int8) valid_max: 1 (Type is Int8) origname: ice_flag (Type is String) fullnamepath: /gt3l/ice_flag (Type is String) coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String) gt3l_segment_lon[ /gt3l_delta_time= 0..20712] (Type is Float64) attributes units: degrees_east (Type is String) contentType: physicalMeasurement (Type is String) long_name: Longitude (Type is String) standard_name: longitude (Type is String) description: Longitude of reporting location (Type is String) source: section 5.3.5 (A) (Type is String) valid_min: -180.00000000000000 (Type is Float64) valid_max: 180.00000000000000 (Type is Float64) origname: segment_lon (Type is String) fullnamepath: /gt3l/segment_lon (Type is String) coordinates: gt3l_delta_time gt3l_segment_lat (Type is String) gt3l_ht_ortho[ /gt3l_delta_time= 0..20712] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: meters (Type is String) contentType: physicalMeasurement (Type is String) long_name: Orthometric Height (Type is String) description: Orthometric height converted from ellipsoidal height. (Type is String) source: section 5.3.5 (A) (Type is String) origname: ht_ortho (Type is String) fullnamepath: /gt3l/ht_ortho (Type is String) coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String) gt3l_segment_lat[ /gt3l_delta_time= 0..20712] (Type is Float64) attributes units: degrees_north (Type is String) contentType: physicalMeasurement (Type is String) long_name: Latitude (Type is String) standard_name: latitude (Type is String) description: Latitude of reporting location (Type is String) source: section 5.3.5 (A) (Type is String) valid_min: -90.000000000000000 (Type is Float64) valid_max: 90.000000000000000 (Type is Float64) origname: segment_lat (Type is String) fullnamepath: /gt3l/segment_lat (Type is String) coordinates: gt3l_delta_time gt3l_segment_lon (Type is String) gt3l_ht_water_surf[ /gt3l_delta_time= 0..20712] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: meters (Type is String) contentType: physicalMeasurement (Type is String) long_name: Water Surface Height (Type is String) description: Water surface height with reference to WGS84 ellipsoid (Type is String) source: section 5.3.5 (A) (Type is String) origname: ht_water_surf (Type is String) fullnamepath: /gt3l/ht_water_surf (Type is String) coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String) gt3l_err_ht_water_surf[ /gt3l_delta_time= 0..20712] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Height Error (Type is String) description: Error included in heights reported in ht_water_surf. (Type is String) source: section 5.3.3 (C) (Type is String) origname: err_ht_water_surf (Type is String) fullnamepath: /gt3l/err_ht_water_surf (Type is String) coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String) gt3l_atl13refid[ /gt3l_delta_time= 0..20712] (Type is Int64) attributes _FillValue: 0 (Type is Int64) units: 1 (Type is String) contentType: referenceInformation (Type is String) long_name: ATL13 Reference ID (Type is String) description: Unique aggregate reference number for each shape in the ATL13 Inland Water Body Mask, where digit 1 = type, digit 2 = size, digit 3 = source, and digits 4-10 = shape id (Type is String) source: ATL13 ATBD, Section 5.3.1 (C) (Type is String) origname: atl13refid (Type is String) fullnamepath: /gt3l/atl13refid (Type is String) coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String) gt3l_qf_cloud[ /gt3l_delta_time= 0..20712] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Consolidated cloud flag (Type is String) description: This flag is a combination of multiple flags (cloud_flag_atm, cloud_flag_asr, and bsnow_con) and takes daytime/nighttime into consideration. A value of 1 means clouds or blowing snow are likely present. A value of 0 indicates the likely absence of clouds or blowing snow. From the ATL09 data closest to the segment time. (Type is String) source: ATL09 (Type is String) flag_meanings: likely_clear likely_cloudy (Type is String) flag_values: 0, 1 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 1 (Type is Int32) origname: qf_cloud (Type is String) fullnamepath: /gt3l/qf_cloud (Type is String) coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String) gt3l_inland_water_body_source[ /gt3l_delta_time= 0..20712] (Type is Int8) attributes _FillValue: 127 (Type is Int8) units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Body Source (Type is String) description: Source of Inland Water Body shape, where 1=HydroLAKES, 2=Global Lakes and Wetlands Database, 3=Named Marine Water Bodies, 4=GSHHG Shoreline, 5=Reserved, 6=Reserved, 7=Reserved, 8=Reserved, 9=Reserved (Type is String) source: ATL13 ATBD, Section 5.3.1 (C) (Type is String) flag_meanings: HydroLAKES Global_Lakes_and_Wetlands_Database Named_Marine_Water_Bodies GSHHG_Shoreline Reserved Reserved Reserved Reserved Reserved (Type is String) flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 (Type is Int8) valid_min: 1 (Type is Int8) valid_max: 9 (Type is Int8) origname: inland_water_body_source (Type is String) fullnamepath: /gt3l/inland_water_body_source (Type is String) coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String) gt3l_inland_water_body_size[ /gt3l_delta_time= 0..20712] (Type is Int8) attributes _FillValue: 127 (Type is Int8) units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Body Size (Type is String) description: Size of Inland Water Body, A=area, where 1=A>10,000 km2, 2=10,000>A>=1,000, 3=1,000>A>=100, 4=100>A>=10, 5=10>A>=1, 6=1>A>=0.1, 7=0.01>A, 8=Reserved, 9=Reserved (Type is String) source: ATL13 ATBD, Section 5.3.1 (C) (Type is String) flag_meanings: A>10000 10000>A>=1000 1000>A>=100 100>A>=10 10>A>=1 1>A>=0.1 0.01>A Reserved Reserved (Type is String) flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 (Type is Int8) valid_min: 1 (Type is Int8) valid_max: 9 (Type is Int8) origname: inland_water_body_size (Type is String) fullnamepath: /gt3l/inland_water_body_size (Type is String) coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String) gt3l_err_slope_trk[ /gt3l_delta_time= 0..20712] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Slope Error (Type is String) description: Error included in segment_slope_trk_local. (Type is String) source: section 5.3.3 (C) (Type is String) origname: err_slope_trk (Type is String) fullnamepath: /gt3l/err_slope_trk (Type is String) coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String) gt3l_segment_slope_trk_bdy[ /gt3l_delta_time= 0..20712] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: 1 (Type is String) contentType: physicalMeasurement (Type is String) long_name: Water Body Slope (Type is String) description: Along track water body surface slope. (Type is String) source: section 5.3.5 (A) (Type is String) origname: segment_slope_trk_bdy (Type is String) fullnamepath: /gt3l/segment_slope_trk_bdy (Type is String) coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String) gt3l_sseg_mean_lat[ /gt3l_delta_time= 0..20712] (Type is Float64) attributes _FillValue: 1.7976931348623157e+308 (Type is Float64) units: degrees_north (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Short Segment Mean Latitude (Type is String) description: Mean latitude of the signal-qualified photons in a short segment. (Type is String) source: Inland Water ATBD (Type is String) valid_min: -90.000000000000000 (Type is Float64) valid_max: 90.000000000000000 (Type is Float64) origname: sseg_mean_lat (Type is String) fullnamepath: /gt3l/sseg_mean_lat (Type is String) coordinates: gt3l_delta_time (Type is String) gt3l_qf_spec_width[ /gt3l_delta_time= 0..20712] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Spectral Width Flag (Type is String) description: The Spectral Width flag is set based on threshold checks for the estimated Spectral Width. The flag is set as follows: 0 if spec_width < 0.5; 1 if spec_width >= +0.5. (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: below_0.5 above_0.5 (Type is String) flag_values: 0, 1 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 1 (Type is Int32) origname: qf_spec_width (Type is String) fullnamepath: /gt3l/qf_spec_width (Type is String) coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String) gt3l_qf_bckgrd[ /gt3l_delta_time= 0..20712] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Background Quality Flag (Type is String) description: Describes the degree of background photons present in each short segment. bckgrd_dnsty_threshold1= 0.001 (counts per bi per Lseg); bckgrd_dnsty_threshold2= 0.01 (counts per bin per Lseg); bckgrd_dnsty_threshold3= 0.05 (counts per bin per Lseg); bckgrd_dnsty_threshold4= 0.1 (counts per bin per Lseg); bckgrd_dnsty_threshold5= 0.3 (counts per bin per Lseg); bckgrd_dnsty_threshold6= 0.5 (counts per bin per Lseg) (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: equal_to_or_below_threshold1 equal_to_or_below_threshold2 equal_to_or_below_threshold3 equal_to_or_below_threshold4 equal_to_or_below_threshold5 equal_to_or_below_threshold6 above_threshold6 (Type is String) flag_values: 0, 1, 2, 3, 4, 5, 6 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 6 (Type is Int32) origname: qf_bckgrd (Type is String) fullnamepath: /gt3l/qf_bckgrd (Type is String) coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon (Type is String) gt3l_sseg_mean_time[ /gt3l_delta_time= 0..20712] (Type is Float64) attributes contentType: auxiliaryInformation (Type is String) long_name: Short Segment Mean Time (Type is String) description: Mean time of the signal-qualified photons in a short segment. (Type is String) source: Inland Water ATBD (Type is String) _FillValue: 1.7976931348623157e+308 (Type is Float64) units: Seconds since 2018-01-01 (Type is String) origname: sseg_mean_time (Type is String) fullnamepath: /gt3l/sseg_mean_time (Type is String) coordinates: gt3l_delta_time (Type is String) gt2l_rgt[ /gt2l_delta_time= 0..16301] (Type is Int16) attributes units: 1 (Type is String) contentType: referenceInformation (Type is String) long_name: Reference Ground track (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 is String) source: ATL03 (Type is String) valid_min: 1 (Type is Int16) valid_max: 1387 (Type is Int16) origname: rgt (Type is String) fullnamepath: /gt2l/rgt (Type is String) coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String) gt2l_qf_bias_fit[ /gt2l_delta_time= 0..16301] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Height Bias Fit Quality Flag (Type is String) description: The height bias fit flag is set based on the value of the goodness of fit bias estimated as the difference between the centroid elevations of the observed surface water histogram and fitted integrated water surface model histogram. The flag values are set as follows: = -3 if H_bias_fit < -0.10 (m); -2 if -0.10 <= H_bias_fit < -0.05;-1 when -0.05 <= H_bias_fit < -0.01; 0 if -0.01 <= H_bias_fit < 0.01 (m); 1 if 0.01 <= H_bias_fit < 0.05; 2 if 0.05 < H_bias_fit < 0.10; 3 if 0.10 <= H_bias_fit; 4 if H_bias_fit is invalid. (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 equal_to_or_above_threshold6 invalid (Type is String) flag_values: -3, -2, -1, 0, 1, 2, 3, 4 (Type is Int32) valid_min: -3 (Type is Int32) valid_max: 4 (Type is Int32) origname: qf_bias_fit (Type is String) fullnamepath: /gt2l/qf_bias_fit (Type is String) coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String) gt2l_sseg_mean_lon[ /gt2l_delta_time= 0..16301] (Type is Float64) attributes units: degrees_east (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Short Segment Mean Longitude (Type is String) description: Mean longitude of the signal-qualified photons in a short segment. (Type is String) source: Inland Water ATBD (Type is String) valid_min: -180.00000000000000 (Type is Float64) valid_max: 180.00000000000000 (Type is Float64) origname: sseg_mean_lon (Type is String) fullnamepath: /gt2l/sseg_mean_lon (Type is String) coordinates: gt2l_delta_time (Type is String) gt2l_qf_ice[ /gt2l_delta_time= 0..16301] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Ice Quality Flag (Type is String) description: The quality flag for ice describes the likelihood of ice on the short water body surface segment. 0 for QF_Bckgrd<= 2; 1 for 2 < QF_Bckgrd<= 4; 2 for 4 < QF_Bckgrd; 3 for (4 < QF_Bckgrd and QF_Cloud=1) (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: qf_bckgrd_le_2 qf_bckgrd_le_4 qf_bckgrd_gt_4 qf_bckgrd_w_cloud (Type is String) flag_values: 0, 1, 2, 3 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 3 (Type is Int32) origname: qf_ice (Type is String) fullnamepath: /gt2l/qf_ice (Type is String) coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String) gt2l_inland_water_body_type[ /gt2l_delta_time= 0..16301] (Type is Int8) attributes _FillValue: 127 (Type is Int8) units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Body Type (Type is String) description: Type of Inland Water Body, where 1=Lake, 2=Known Reservoir, 3=(Reserved for future use), 4=Ephemeral Water, 5=River, 6=Estuary or Bay, 7=Coastal Water, 8=Reserved, 9=Reserved (Type is String) source: ATL13 ATBD, Section 5.3.1 (C) (Type is String) flag_meanings: Lake Known_Reservoir Reserved_for_future_use Ephemeral_Water River Estuary_or_Bay Coastal_Water Reserved Reserved (Type is String) flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 (Type is Int8) valid_min: 1 (Type is Int8) valid_max: 9 (Type is Int8) origname: inland_water_body_type (Type is String) fullnamepath: /gt2l/inland_water_body_type (Type is String) coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String) gt2l_inland_water_body_id[ /gt2l_delta_time= 0..16301] (Type is Int32) attributes contentType: referenceInformation (Type is String) long_name: Body ID (Type is String) description: Identifying signature of an individual inland water body. Each body of water is represented by a unique numeric value. (Type is String) source: ATL13 ATBD, Section 5.3.1 (C) (Type is String) _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) origname: inland_water_body_id (Type is String) fullnamepath: /gt2l/inland_water_body_id (Type is String) coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String) gt2l_segment_geoid[ /gt2l_delta_time= 0..16301] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: meters (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Segment Geoid (Type is String) description: Applicable geoid value at reporting location for all short segment statistics. (Type is String) source: ATL03 (Type is String) origname: segment_geoid (Type is String) fullnamepath: /gt2l/segment_geoid (Type is String) coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String) gt2l_qf_sseg_length[ /gt2l_delta_time= 0..16301] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Short Segment Length flag (Type is String) description: The Short Segment Length flag is set based on the length of the short segment. The flag is set as follows: 0 if sseg_length< 50 (meters); 1 if 50 <sseg_length < 150 (meters); 2 if 150 < sseg_length< 300 (meters); 3 if 300 < sseg_length. (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: below_threshold1 below_threshold2 below_threshold3 above_threshold4 (Type is String) flag_values: 0, 1, 2, 3 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 3 (Type is Int32) origname: qf_sseg_length (Type is String) fullnamepath: /gt2l/qf_sseg_length (Type is String) coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String) gt2l_qf_lseg_length[ /gt2l_delta_time= 0..16301] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Long Segment Length flag (Type is String) description: The Long Segment Length flag is set based on the length of the long segment. The flag is set as follows: 0 if Lseg_length < 500 (meters); 1 if 50 <= Lseg_length < 1500 (meters); 2 if 150 <= Lseg_length < 3000 (meters); 3 if 3000 <= Lseg_length (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: below_threshold1 below_threshold2 below_threshold3 above_threshold4 (Type is String) flag_values: 0, 1, 2, 3 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 3 (Type is Int32) origname: qf_lseg_length (Type is String) fullnamepath: /gt2l/qf_lseg_length (Type is String) coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String) gt2l_significant_wave_ht[ /gt2l_delta_time= 0..16301] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: meters (Type is String) contentType: physicalMeasurement (Type is String) long_name: SWH (Type is String) description: Significant wave height (Type is String) source: section 5.3.3 (C) (Type is String) origname: significant_wave_ht (Type is String) fullnamepath: /gt2l/significant_wave_ht (Type is String) coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String) gt2l_qf_bias_em[ /gt2l_delta_time= 0..16301] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: EM Bias Quality Flag (Type is String) description: The Electromagnetic Bias flag is set based on threshold checks for the estimated electromagnetic height bias. The flag is set as follows: -3 if H_bias_EM < -0.10 (m); -2 if -0.10 < H_bias_EM < -0.05; -1 if -0.05 <= H_bias_EM < -0.01; 0 if -0.01 <= H_bias_EM < 0.01 (m); 1 if 0.01 <= H_bias_EM < 0.05; 2 if 0.05 <= H_bias_EM < 0.10; 3 if 0.10 < H_bias_EM; 4 if H_bias_EM is invalid. (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 above_threshold6 invalid (Type is String) flag_values: -3, -2, -1, 0, 1, 2, 3, 4 (Type is Int32) valid_min: -3 (Type is Int32) valid_max: 4 (Type is Int32) origname: qf_bias_em (Type is String) fullnamepath: /gt2l/qf_bias_em (Type is String) coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String) gt2l_segment_id_end[ /gt2l_delta_time= 0..16301] (Type is Int32) attributes units: 1 (Type is String) contentType: referenceInformation (Type is String) long_name: Last ATL03 Segment ID (Type is String) description: Last ATL03 segment_id associated with the photons within this inland water segment. (Type is String) source: ATL03 (Type is String) origname: segment_id_end (Type is String) fullnamepath: /gt2l/segment_id_end (Type is String) coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String) gt2l_stdev_water_surf[ /gt2l_delta_time= 0..16301] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: meters (Type is String) contentType: referenceInformation (Type is String) long_name: Surface StDev (Type is String) description: Standard deviation of water surface, calculated over long segments with result reported at each short segment location tag contained within. (Type is String) source: section 5.3.3 (C) (Type is String) origname: stdev_water_surf (Type is String) fullnamepath: /gt2l/stdev_water_surf (Type is String) coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String) gt2l_qf_iwp[ /gt2l_delta_time= 0..16301] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) contentType: qualityInformation (Type is String) long_name: Inland Water Segment Processing Flag (Type is String) description: Inland Water segment Processing (IWP) flag to describe the level of processing the inland water algorithm was able to perform on each short segment based on the data available, ranging from 1 to 7. (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: 1_short_segment 2_short_segments 3_to_5_short_segments 6_to_7_short_segments 8_to_9_short_segments 10_to_29_short_segments 30_or_more_short_segments_analyzed (Type is String) flag_values: 1, 2, 3, 4, 5, 6, 7 (Type is Int32) valid_min: 1 (Type is Int32) valid_max: 7 (Type is Int32) origname: qf_iwp (Type is String) fullnamepath: /gt2l/qf_iwp (Type is String) coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String) gt2l_segment_id_beg[ /gt2l_delta_time= 0..16301] (Type is Int32) attributes units: 1 (Type is String) contentType: referenceInformation (Type is String) long_name: First ATL03 Segment ID (Type is String) description: First ATL03 segment_id associated with the photons within this inland water segment. (Type is String) source: ATL03 (Type is String) origname: segment_id_beg (Type is String) fullnamepath: /gt2l/segment_id_beg (Type is String) coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String) gt2l_cycle[ /gt2l_delta_time= 0..16301] (Type is Int8) attributes units: counts (Type is String) contentType: referenceInformation (Type is String) long_name: Cycle Number (Type is String) description: Tracks the number of 91-day cycles in the mission, beginning with 01. (Type is String) source: ATL03 (Type is String) valid_min: 0 (Type is Int8) valid_max: 50 (Type is Int8) origname: cycle (Type is String) fullnamepath: /gt2l/cycle (Type is String) coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String) gt2l_qf_subsurf_anomaly[ /gt2l_delta_time= 0..16301] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Subsurface Anomaly Quality Flag (Type is String) description: The subsurface anomaly flag is defined as in atbd section 4.5.5.5 above. It is computed for each bin between 6 Stdev below the mean of the integrated model to 20m depth. The anomaly is set to 0 when bin value +<+3* subsurface mean plus s~sub~subsurface and set to 1 when subsurface bin value is other (meaning an anomaly exists) (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: unlikely_subsurface likely_subsurface (Type is String) flag_values: 0, 1 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 1 (Type is Int32) origname: qf_subsurf_anomaly (Type is String) fullnamepath: /gt2l/qf_subsurf_anomaly (Type is String) coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String) gt2l_subsurface_attenuation[ /gt2l_delta_time= 0..16301] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: 1 (Type is String) contentType: physicalMeasurement (Type is String) long_name: Subsurface Attenuation (Type is String) description: Subsurface attenuation coefficient. (Type is String) source: section 5.3.4 (A) (Type is String) origname: subsurface_attenuation (Type is String) fullnamepath: /gt2l/subsurface_attenuation (Type is String) coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String) gt2l_inland_water_body_region[ /gt2l_delta_time= 0..16301] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: referenceInformation (Type is String) long_name: Body Region (Type is String) description: ATL13-created shapefile representing relevant bodies of water over which to implement the ATL13 water surface finding algorithm only within a region of processing interest. (Type is String) source: section 5.3.1 (A) (Type is String) origname: inland_water_body_region (Type is String) fullnamepath: /gt2l/inland_water_body_region (Type is String) coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String) gt2l_ice_flag[ /gt2l_delta_time= 0..16301] (Type is Int8) attributes units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Ice Flag (Type is String) description: Flag indicating significant existence of ice on the water surface (Type is String) source: section 5.3.2 (D) (Type is String) flag_meanings: no_ice ice (Type is String) flag_values: 0, 1 (Type is Int8) valid_min: 0 (Type is Int8) valid_max: 1 (Type is Int8) origname: ice_flag (Type is String) fullnamepath: /gt2l/ice_flag (Type is String) coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String) gt2l_segment_lon[ /gt2l_delta_time= 0..16301] (Type is Float64) attributes units: degrees_east (Type is String) contentType: physicalMeasurement (Type is String) long_name: Longitude (Type is String) standard_name: longitude (Type is String) description: Longitude of reporting location (Type is String) source: section 5.3.5 (A) (Type is String) valid_min: -180.00000000000000 (Type is Float64) valid_max: 180.00000000000000 (Type is Float64) origname: segment_lon (Type is String) fullnamepath: /gt2l/segment_lon (Type is String) coordinates: gt2l_delta_time gt2l_segment_lat (Type is String) gt2l_ht_ortho[ /gt2l_delta_time= 0..16301] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: meters (Type is String) contentType: physicalMeasurement (Type is String) long_name: Orthometric Height (Type is String) description: Orthometric height converted from ellipsoidal height. (Type is String) source: section 5.3.5 (A) (Type is String) origname: ht_ortho (Type is String) fullnamepath: /gt2l/ht_ortho (Type is String) coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String) gt2l_segment_lat[ /gt2l_delta_time= 0..16301] (Type is Float64) attributes units: degrees_north (Type is String) contentType: physicalMeasurement (Type is String) long_name: Latitude (Type is String) standard_name: latitude (Type is String) description: Latitude of reporting location (Type is String) source: section 5.3.5 (A) (Type is String) valid_min: -90.000000000000000 (Type is Float64) valid_max: 90.000000000000000 (Type is Float64) origname: segment_lat (Type is String) fullnamepath: /gt2l/segment_lat (Type is String) coordinates: gt2l_delta_time gt2l_segment_lon (Type is String) gt2l_ht_water_surf[ /gt2l_delta_time= 0..16301] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: meters (Type is String) contentType: physicalMeasurement (Type is String) long_name: Water Surface Height (Type is String) description: Water surface height with reference to WGS84 ellipsoid (Type is String) source: section 5.3.5 (A) (Type is String) origname: ht_water_surf (Type is String) fullnamepath: /gt2l/ht_water_surf (Type is String) coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String) gt2l_err_ht_water_surf[ /gt2l_delta_time= 0..16301] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Height Error (Type is String) description: Error included in heights reported in ht_water_surf. (Type is String) source: section 5.3.3 (C) (Type is String) origname: err_ht_water_surf (Type is String) fullnamepath: /gt2l/err_ht_water_surf (Type is String) coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String) gt2l_atl13refid[ /gt2l_delta_time= 0..16301] (Type is Int64) attributes _FillValue: 0 (Type is Int64) units: 1 (Type is String) contentType: referenceInformation (Type is String) long_name: ATL13 Reference ID (Type is String) description: Unique aggregate reference number for each shape in the ATL13 Inland Water Body Mask, where digit 1 = type, digit 2 = size, digit 3 = source, and digits 4-10 = shape id (Type is String) source: ATL13 ATBD, Section 5.3.1 (C) (Type is String) origname: atl13refid (Type is String) fullnamepath: /gt2l/atl13refid (Type is String) coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String) gt2l_qf_cloud[ /gt2l_delta_time= 0..16301] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Consolidated cloud flag (Type is String) description: This flag is a combination of multiple flags (cloud_flag_atm, cloud_flag_asr, and bsnow_con) and takes daytime/nighttime into consideration. A value of 1 means clouds or blowing snow are likely present. A value of 0 indicates the likely absence of clouds or blowing snow. From the ATL09 data closest to the segment time. (Type is String) source: ATL09 (Type is String) flag_meanings: likely_clear likely_cloudy (Type is String) flag_values: 0, 1 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 1 (Type is Int32) origname: qf_cloud (Type is String) fullnamepath: /gt2l/qf_cloud (Type is String) coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String) gt2l_inland_water_body_source[ /gt2l_delta_time= 0..16301] (Type is Int8) attributes _FillValue: 127 (Type is Int8) units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Body Source (Type is String) description: Source of Inland Water Body shape, where 1=HydroLAKES, 2=Global Lakes and Wetlands Database, 3=Named Marine Water Bodies, 4=GSHHG Shoreline, 5=Reserved, 6=Reserved, 7=Reserved, 8=Reserved, 9=Reserved (Type is String) source: ATL13 ATBD, Section 5.3.1 (C) (Type is String) flag_meanings: HydroLAKES Global_Lakes_and_Wetlands_Database Named_Marine_Water_Bodies GSHHG_Shoreline Reserved Reserved Reserved Reserved Reserved (Type is String) flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 (Type is Int8) valid_min: 1 (Type is Int8) valid_max: 9 (Type is Int8) origname: inland_water_body_source (Type is String) fullnamepath: /gt2l/inland_water_body_source (Type is String) coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String) gt2l_inland_water_body_size[ /gt2l_delta_time= 0..16301] (Type is Int8) attributes _FillValue: 127 (Type is Int8) units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Body Size (Type is String) description: Size of Inland Water Body, A=area, where 1=A>10,000 km2, 2=10,000>A>=1,000, 3=1,000>A>=100, 4=100>A>=10, 5=10>A>=1, 6=1>A>=0.1, 7=0.01>A, 8=Reserved, 9=Reserved (Type is String) source: ATL13 ATBD, Section 5.3.1 (C) (Type is String) flag_meanings: A>10000 10000>A>=1000 1000>A>=100 100>A>=10 10>A>=1 1>A>=0.1 0.01>A Reserved Reserved (Type is String) flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 (Type is Int8) valid_min: 1 (Type is Int8) valid_max: 9 (Type is Int8) origname: inland_water_body_size (Type is String) fullnamepath: /gt2l/inland_water_body_size (Type is String) coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String) gt2l_err_slope_trk[ /gt2l_delta_time= 0..16301] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Slope Error (Type is String) description: Error included in segment_slope_trk_local. (Type is String) source: section 5.3.3 (C) (Type is String) origname: err_slope_trk (Type is String) fullnamepath: /gt2l/err_slope_trk (Type is String) coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String) gt2l_segment_slope_trk_bdy[ /gt2l_delta_time= 0..16301] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: 1 (Type is String) contentType: physicalMeasurement (Type is String) long_name: Water Body Slope (Type is String) description: Along track water body surface slope. (Type is String) source: section 5.3.5 (A) (Type is String) origname: segment_slope_trk_bdy (Type is String) fullnamepath: /gt2l/segment_slope_trk_bdy (Type is String) coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String) gt2l_sseg_mean_lat[ /gt2l_delta_time= 0..16301] (Type is Float64) attributes _FillValue: 1.7976931348623157e+308 (Type is Float64) units: degrees_north (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Short Segment Mean Latitude (Type is String) description: Mean latitude of the signal-qualified photons in a short segment. (Type is String) source: Inland Water ATBD (Type is String) valid_min: -90.000000000000000 (Type is Float64) valid_max: 90.000000000000000 (Type is Float64) origname: sseg_mean_lat (Type is String) fullnamepath: /gt2l/sseg_mean_lat (Type is String) coordinates: gt2l_delta_time (Type is String) gt2l_qf_spec_width[ /gt2l_delta_time= 0..16301] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Spectral Width Flag (Type is String) description: The Spectral Width flag is set based on threshold checks for the estimated Spectral Width. The flag is set as follows: 0 if spec_width < 0.5; 1 if spec_width >= +0.5. (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: below_0.5 above_0.5 (Type is String) flag_values: 0, 1 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 1 (Type is Int32) origname: qf_spec_width (Type is String) fullnamepath: /gt2l/qf_spec_width (Type is String) coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String) gt2l_qf_bckgrd[ /gt2l_delta_time= 0..16301] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Background Quality Flag (Type is String) description: Describes the degree of background photons present in each short segment. bckgrd_dnsty_threshold1= 0.001 (counts per bi per Lseg); bckgrd_dnsty_threshold2= 0.01 (counts per bin per Lseg); bckgrd_dnsty_threshold3= 0.05 (counts per bin per Lseg); bckgrd_dnsty_threshold4= 0.1 (counts per bin per Lseg); bckgrd_dnsty_threshold5= 0.3 (counts per bin per Lseg); bckgrd_dnsty_threshold6= 0.5 (counts per bin per Lseg) (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: equal_to_or_below_threshold1 equal_to_or_below_threshold2 equal_to_or_below_threshold3 equal_to_or_below_threshold4 equal_to_or_below_threshold5 equal_to_or_below_threshold6 above_threshold6 (Type is String) flag_values: 0, 1, 2, 3, 4, 5, 6 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 6 (Type is Int32) origname: qf_bckgrd (Type is String) fullnamepath: /gt2l/qf_bckgrd (Type is String) coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon (Type is String) gt2l_sseg_mean_time[ /gt2l_delta_time= 0..16301] (Type is Float64) attributes contentType: auxiliaryInformation (Type is String) long_name: Short Segment Mean Time (Type is String) description: Mean time of the signal-qualified photons in a short segment. (Type is String) source: Inland Water ATBD (Type is String) _FillValue: 1.7976931348623157e+308 (Type is Float64) units: Seconds since 2018-01-01 (Type is String) origname: sseg_mean_time (Type is String) fullnamepath: /gt2l/sseg_mean_time (Type is String) coordinates: gt2l_delta_time (Type is String) ancillary_data_release[ /FakeDim0= 0..0] (Type is String) attributes units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Release Number (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 is String) source: Operations (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 units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Ending Geolocation Segment (Type is String) description: The ending geolocation segment number associated with the data contained within this granule. ICESat 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 is String) source: Derived (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 units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Version (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 is String) source: Operations (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 units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Ending Region (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 is String) source: Derived (Type is String) origname: end_region (Type is String) fullnamepath: /ancillary_data/end_region (Type is String) ancillary_data_atlas_sdp_gps_epoch[ /FakeDim0= 0..0] (Type is Float64) attributes units: seconds since 1980-01-06T00:00:00.000000Z (Type is String) contentType: auxiliaryInformation (Type is String) long_name: ATLAS Epoch Offset (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 is String) source: Operations (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 units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Ending Reference Groundtrack (Type is String) description: The ending reference groundtrack (RGT) number associated with the data contained within this granule. There are 1387 reference groundtrack in the ICESat-2 repeat orbit. The reference groundtrack 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 is String) source: Derived (Type is String) valid_min: 1 (Type is Int32) valid_max: 1387 (Type is Int32) 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 units: seconds since 2018-01-01 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: ATLAS End Time (Actual) (Type is String) standard_name: time (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 is String) source: Derived (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 units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Ending Orbit Number (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 is String) source: Derived (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 units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Starting Cycle (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 is String) source: Derived (Type is String) valid_min: 0 (Type is Int32) valid_max: 99 (Type is Int32) 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 units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: End UTC Time of Granule (CCSDS-A, Actual) (Type is String) description: UTC (in CCSDS-A format) of the last data point within the granule. (Type is String) source: Derived (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 units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Control File (Type is String) description: PGE-specific control file used to generate this granule. To re-use, replace breaks (BR) with linefeeds. (Type is String) source: Operations (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 units: seconds (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Start GPS SOW of Granule (Actual) (Type is String) description: GPS seconds-of-week of the first data point in the granule. (Type is String) source: Derived (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 units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: End UTC Time of Granule (CCSDS-A, Requested) (Type is String) description: Requested end time (in UTC CCSDS-A) of this granule. (Type is String) source: Derived (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 units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Ending Cycle (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 is String) source: Derived (Type is String) valid_min: 0 (Type is Int32) valid_max: 99 (Type is Int32) 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 units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Start UTC Time of Granule (CCSDS-A, Requested) (Type is String) description: Requested start time (in UTC CCSDS-A) of this granule. (Type is String) source: Derived (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 units: seconds since 2018-01-01 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: ATLAS Start Time (Actual) (Type is String) standard_name: time (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 is String) source: Derived (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 units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Starting Geolocation Segment (Type is String) description: The starting geolocation segment number associated with the data contained within this granule. ICESat 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 is String) source: Derived (Type is String) origname: start_geoseg (Type is String) fullnamepath: /ancillary_data/start_geoseg (Type is String) ancillary_data_inland_water_atm_window2[ /FakeDim0= 0..0] (Type is Float32) attributes units: meters (Type is String) contentType: auxiliaryInformation (Type is String) long_name: ATM Background Window Top (Type is String) description: Upper limit of height above coarse water surface height for atmospheric background count calculation. (Type is String) source: ATBD Table 5-2 (Type is String) origname: atm_window2 (Type is String) fullnamepath: /ancillary_data/inland_water/atm_window2 (Type is String) ancillary_data_inland_water_b1_sseg1[ /FakeDim0= 0..0] (Type is Float32) attributes units: meters (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Small Segment Bin Size (Type is String) description: Bin size to be used for histogramming of each small segment. (Type is String) source: ATBD Table 5-2 (Type is String) origname: b1_sseg1 (Type is String) fullnamepath: /ancillary_data/inland_water/b1_sseg1 (Type is String) ancillary_data_inland_water_s_seg1[ /FakeDim0= 0..0] (Type is Int32) attributes units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Short Segment Length (Type is String) description: Short segment size, operationally used as unit length over which to identify water surface height anomalies such as islands, bridges, etc. (Type is String) source: ATBD Table 5-2 (Type is String) origname: s_seg1 (Type is String) fullnamepath: /ancillary_data/inland_water/s_seg1 (Type is String) ancillary_data_inland_water_detrend_width[ /FakeDim0= 0..0] (Type is Float32) attributes units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Detrend Width (Type is String) description: Number of standard deviations +/- mode to include in detrend band. (Type is String) source: ATBD Table 5-2 (Type is String) origname: detrend_width (Type is String) fullnamepath: /ancillary_data/inland_water/detrend_width (Type is String) ancillary_data_inland_water_sub_max[ /FakeDim0= 0..0] (Type is Float32) attributes units: meters (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Subsurf Max Vertical Profile (Type is String) description: Maximum vertical profile of water subsurface to include in estimation of subsurface characteristics (Type is String) source: ATBD Table 5-2 (Type is String) origname: sub_max (Type is String) fullnamepath: /ancillary_data/inland_water/sub_max (Type is String) ancillary_data_inland_water_ref_dist_iw_bdy[ /FakeDim0= 0..0] (Type is Float32) attributes units: meters (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Reference Difference (Type is String) description: Maximum distance from a water body that a geosegment reference photon indicates the need for overlap testing each individual photon in the geosegment (Type is String) source: ATBD Table 5-2 (Type is String) origname: ref_dist_iw_bdy (Type is String) fullnamepath: /ancillary_data/inland_water/ref_dist_iw_bdy (Type is String) ancillary_data_inland_water_sseg_mode_freq_test[ /FakeDim0= 0..0] (Type is Int32) attributes units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Short Segment Mode Frequency Test (Type is String) description: Threshold to test number of short segment histogram modes against for inclusion or exclusion of short segment. (Type is String) source: ATBD Table 5-2 (Type is String) origname: sseg_mode_freq_test (Type is String) fullnamepath: /ancillary_data/inland_water/sseg_mode_freq_test (Type is String) ancillary_data_inland_water_type_to_process[ /FakeDim1= 0..8] (Type is Int8) attributes _FillValue: 127 (Type is Int8) units: 1 (Type is String) long_name: Type to Process (Type is String) description: Water body types that are to be processed by the ATL13 algorithm. This parameter is a rank 1 array of extent 9, with the body type digits coinciding with the array subscripts 1 through 9. Array elements are binary values, if 0 then process body type, 1 otherwise. Water body types are described in ATL13 chapter 4.7.1.2 and in Table 5-4. (Type is String) source: ATL13 ATBD, Section 4.7.1.2, Table 5-4 (Type is String) flag_meanings: process_type otherwise (Type is String) flag_values: 0, 1 (Type is Int8) valid_min: 0 (Type is Int8) valid_max: 1 (Type is Int8) contentType: auxiliaryInformation (Type is String) origname: type_to_process (Type is String) fullnamepath: /ancillary_data/inland_water/type_to_process (Type is String) ancillary_data_inland_water_sig_threshold[ /FakeDim0= 0..0] (Type is Int32) attributes units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Signal Confidence Threshold (Type is String) description: Minimum signal confidence required for photon to be included in analysis (Type is String) source: ATBD Table 5-2 (Type is String) origname: sig_threshold (Type is String) fullnamepath: /ancillary_data/inland_water/sig_threshold (Type is String) ancillary_data_inland_water_size_to_process[ /FakeDim1= 0..8] [ /FakeDim3= 0..8] (Type is Int8) attributes _FillValue: 127 (Type is Int8) units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Size to Process (Type is String) description: Water body sizes that are to be processed by the ATL13 algorithm for each water body type. This parameter is a rank 2 array of size 9x9, where array subscripts 1 through 9, coincide with body type digits along columns, and body size digits along rows. Array elements are binary values, if 0 then process body size for that type, 1 otherwise. Water body sizes are described in ATL13 chapter 4.7.1.2 and in Table 5-4. (Type is String) source: ATL13 ATBD, Section 4.7.1.2, Table 5-4 (Type is String) flag_meanings: process_size otherwise (Type is String) flag_values: 0, 1 (Type is Int8) valid_min: 0 (Type is Int8) valid_max: 1 (Type is Int8) origname: size_to_process (Type is String) fullnamepath: /ancillary_data/inland_water/size_to_process (Type is String) ancillary_data_inland_water_gauss_pk_thres[ /FakeDim0= 0..0] (Type is Float32) attributes units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Gaussian Peak Threshold (Type is String) description: Fraction of the peak amplitude above which Gaussian fit error analysis is executed (ie, calculate error on Gaussian only between the peak amplitude and gauss_pk_thres * peak) (Type is String) source: ATBD Table 5-2 (Type is String) origname: gauss_pk_thres (Type is String) fullnamepath: /ancillary_data/inland_water/gauss_pk_thres (Type is String) ancillary_data_inland_water_sseg_mode_cnt_test[ /FakeDim0= 0..0] (Type is Int32) attributes units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Short Segment Mode Count Test (Type is String) description: Threshold to test number of values contained in short segment histogram multimodes against for inclusion or exclusion of short segment (Type is String) source: ATBD Table 5-2 (Type is String) origname: sseg_mode_cnt_test (Type is String) fullnamepath: /ancillary_data/inland_water/sseg_mode_cnt_test (Type is String) ancillary_data_inland_water_shore_buffer[ /FakeDim0= 0..0] (Type is Int32) attributes units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Shore Buffer (Type is String) description: Number of near-shore short segments to ignore in analysis due to near-shore influences. (Type is String) source: ATBD Table 5-2 (Type is String) origname: shore_buffer (Type is String) fullnamepath: /ancillary_data/inland_water/shore_buffer (Type is String) ancillary_data_inland_water_h_mavg_c[ /FakeDim0= 0..0] (Type is Int32) attributes units: meters (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Num Depth Bins C (Type is String) description: Number of bins over which to calculate moving average (Type is String) source: ATBD Table 5-2 (Type is String) origname: h_mavg_c (Type is String) fullnamepath: /ancillary_data/inland_water/h_mavg_c (Type is String) ancillary_data_inland_water_bckgrd_threshold[ /FakeDim4= 0..1] (Type is Float32) attributes units: counts/sec (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Background Threshold (Type is String) description: Thresholds outside of which computed background is flagged (High, Low). (Type is String) source: ATBD Table 5-2 (Type is String) origname: bckgrd_threshold (Type is String) fullnamepath: /ancillary_data/inland_water/bckgrd_threshold (Type is String) ancillary_data_inland_water_f2_d_min[ /FakeDim0= 0..0] (Type is Float32) attributes units: meters (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Minimum Distance Thres (Type is String) description: Minimum distance threshold between photons required for inclusion in algorithm. (Type is String) source: ATBD Table 5-2 (Type is String) origname: f2_d_min (Type is String) fullnamepath: /ancillary_data/inland_water/f2_d_min (Type is String) ancillary_data_inland_water_max_gseg_search[ /FakeDim0= 0..0] (Type is Int32) attributes units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Max Geoseg Search Radius (Type is String) description: Maximum number of geosegments in either direction to search for reported water surface heights (Type is String) source: ATBD Table 5-2 (Type is String) origname: max_gseg_search (Type is String) fullnamepath: /ancillary_data/inland_water/max_gseg_search (Type is String) ancillary_data_inland_water_sseg_length_test[ /FakeDim0= 0..0] (Type is Float32) attributes units: meters (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Short Segment Length Test (Type is String) description: Threshold by which to test the length of a short segment to determine if it is anomalous or not anomalous. (Type is String) source: ATBD Table 5-2 (Type is String) origname: sseg_length_test (Type is String) fullnamepath: /ancillary_data/inland_water/sseg_length_test (Type is String) ancillary_data_inland_water_h_mavg_a[ /FakeDim0= 0..0] (Type is Int32) attributes units: meters (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Num Depth Bins A (Type is String) description: Number of depth bins over which to compute H_mavg_a (Type is String) source: ATBD Table 5-2 (Type is String) origname: h_mavg_a (Type is String) fullnamepath: /ancillary_data/inland_water/h_mavg_a (Type is String) ancillary_data_inland_water_signal_window_bottom[ /FakeDim0= 0..0] (Type is Float32) attributes units: meters (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Signal Window Bottom (Type is String) description: Lower limit below coarse water surface to include photons for analysis. (Type is String) source: ATBD Table 5-2 (Type is String) origname: signal_window_bottom (Type is String) fullnamepath: /ancillary_data/inland_water/signal_window_bottom (Type is String) ancillary_data_inland_water_c_fresnel[ /FakeDim0= 0..0] (Type is Float32) attributes units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Fresnel Coeff (Type is String) description: Fresnel specular reflection coefficient @ 532 nm (Type is String) source: ATBD Table 5-2 (Type is String) origname: c_fresnel (Type is String) fullnamepath: /ancillary_data/inland_water/c_fresnel (Type is String) ancillary_data_inland_water_sseg_mode_spread_test[ /FakeDim0= 0..0] (Type is Float32) attributes units: meters (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Short Segment Mode Spread Test (Type is String) description: Threshold to test distance between short segment histogram multimodes against for inclusion or exclusion of short segment. (Type is String) source: ATBD Table 5-2 (Type is String) origname: sseg_mode_spread_test (Type is String) fullnamepath: /ancillary_data/inland_water/sseg_mode_spread_test (Type is String) ancillary_data_inland_water_anmly_test[ /FakeDim5= 0..3] (Type is Float32) attributes units: meters (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Anomaly Test (Type is String) description: Array containing threshold values against which to test segments for anomalous changes in height. The mode of each segment histogram will be tested against ht_water_coarse and excluded if the difference is greater than the value associated with the segment (Type is String) source: ATBD Table 5-2 (Type is String) origname: anmly_test (Type is String) fullnamepath: /ancillary_data/inland_water/anmly_test (Type is String) ancillary_data_inland_water_c_adj[ /FakeDim0= 0..0] (Type is Float32) attributes units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) description: Adjustment for the speed of light through water (cl) (Type is String) source: ATBD Table 5-2 (Type is String) long_name: C Adjustment (Type is String) origname: c_adj (Type is String) fullnamepath: /ancillary_data/inland_water/c_adj (Type is String) ancillary_data_inland_water_h_mavg_b[ /FakeDim0= 0..0] (Type is Int32) attributes units: meters (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Num Depth Bins B (Type is String) description: Number of depth bins over which to compute H_mavg_b (Type is String) source: ATBD Table 5-2 (Type is String) origname: h_mavg_b (Type is String) fullnamepath: /ancillary_data/inland_water/h_mavg_b (Type is String) ancillary_data_inland_water_b_long[ /FakeDim0= 0..0] (Type is Float32) attributes units: meters (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Long Bin Size (Type is String) description: Bin size to be used by which to establish a histogram of long segments. (Type is String) source: ATBD Table 5-2 (Type is String) origname: b_long (Type is String) fullnamepath: /ancillary_data/inland_water/b_long (Type is String) ancillary_data_inland_water_bin_detrend[ /FakeDim0= 0..0] (Type is Float32) attributes units: meters (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Detrend Bin Size (Type is String) description: Bin size used to establish a band of heights over which to determine the detrending equation. (Type is String) source: ATBD Table 5-2 (Type is String) origname: bin_detrend (Type is String) fullnamepath: /ancillary_data/inland_water/bin_detrend (Type is String) ancillary_data_inland_water_atm_window1[ /FakeDim0= 0..0] (Type is Float32) attributes units: meters (Type is String) contentType: auxiliaryInformation (Type is String) long_name: ATM Background Window Bottom (Type is String) description: Lower limit of height above coarse water surface height for atmospheric background count calculation. (Type is String) source: ATBD Table 5-2 (Type is String) origname: atm_window1 (Type is String) fullnamepath: /ancillary_data/inland_water/atm_window1 (Type is String) ancillary_data_inland_water_m_avg_d[ /FakeDim0= 0..0] (Type is Int32) attributes units: meters (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Num Depth Bins D (Type is String) description: Number of depth bins over which to compute P_ht_long_subsurf_mavg (Type is String) source: ATBD Table 5-2 (Type is String) origname: m_avg_d (Type is String) fullnamepath: /ancillary_data/inland_water/m_avg_d (Type is String) ancillary_data_inland_water_l_surf[ /FakeDim0= 0..0] (Type is Int32) attributes units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Long Surface Segment Size (Type is String) description: Long segment size, operationally used as unit length over which to detrend the water surface, characterize the surface, and deconvolve the instrument pulse and subsurface effects from the water surface response. (Type is String) source: ATBD Table 5-2 (Type is String) origname: l_surf (Type is String) fullnamepath: /ancillary_data/inland_water/l_surf (Type is String) ancillary_data_inland_water_signal_window_top[ /FakeDim0= 0..0] (Type is Float32) attributes units: meters (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Signal Window Top (Type is String) description: Upper limit above coarse water surface to include photons for analysis. (Type is String) source: ATBD Table 5-2 (Type is String) origname: signal_window_top (Type is String) fullnamepath: /ancillary_data/inland_water/signal_window_top (Type is String) ancillary_data_inland_water_lsbr_threshold[ /FakeDim0= 0..0] (Type is Float32) attributes units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: LSBR Threshold (Type is String) description: Threshold at which the LSBR indicates a significant transition from signal photon richness to noise. (Type is String) source: ATBD Table 5-2 (Type is String) origname: lsbr_threshold (Type is String) fullnamepath: /ancillary_data/inland_water/lsbr_threshold (Type is String) ancillary_data_inland_water_l_sub[ /FakeDim0= 0..0] (Type is Int32) attributes units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Long Subsurface Segment Size (Type is String) description: Long segment size, operationally used as unit length over which to characterize the subsurface, and deconvolve the instrument pulse and subsurface effects from the water surface response. (Type is String) source: ATBD Table 5-2 (Type is String) origname: l_sub (Type is String) fullnamepath: /ancillary_data/inland_water/l_sub (Type is String) ancillary_data_inland_water_b2_sseg1[ /FakeDim0= 0..0] (Type is Float32) attributes units: meters (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Small Segment Height Bin Size (Type is String) description: Bin size to be used for histogramming of small segment heights. (Type is String) source: ATBD Table 5-2 (Type is String) origname: b2_sseg1 (Type is String) fullnamepath: /ancillary_data/inland_water/b2_sseg1 (Type is String) ancillary_data_start_orbit[ /FakeDim0= 0..0] (Type is Int32) attributes units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Starting Orbit Number (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 is String) source: Derived (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 units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Start UTC Time of Granule (CCSDS-A, Actual) (Type is String) description: UTC (in CCSDS-A format) of the first data point within the granule. (Type is String) source: Derived (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 units: weeks from 1980-01-06 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Ending GPSWeek of Granule (Actual) (Type is String) description: GPS week number of the last data point in the granule. (Type is String) source: Derived (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 units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Starting Reference Groundtrack (Type is String) description: The starting reference groundtrack (RGT) number associated with the data contained within this granule. There are 1387 reference groundtrack in the ICESat-2 repeat orbit. The reference groundtrack 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 is String) source: Derived (Type is String) valid_min: 1 (Type is Int32) valid_max: 1387 (Type is Int32) 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 units: seconds (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Ending GPS SOW of Granule (Actual) (Type is String) description: GPS seconds-of-week of the last data point in the granule. (Type is String) source: Derived (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 units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Starting Region (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 is String) source: Derived (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 units: weeks from 1980-01-06 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Start GPSWeek of Granule (Actual) (Type is String) description: GPS week number of the first data point in the granule. (Type is String) source: Derived (Type is String) origname: start_gpsweek (Type is String) fullnamepath: /ancillary_data/start_gpsweek (Type is String) gt3r_rgt[ /gt3r_delta_time= 0..5058] (Type is Int16) attributes units: 1 (Type is String) contentType: referenceInformation (Type is String) long_name: Reference Ground track (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 is String) source: ATL03 (Type is String) valid_min: 1 (Type is Int16) valid_max: 1387 (Type is Int16) origname: rgt (Type is String) fullnamepath: /gt3r/rgt (Type is String) coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String) gt3r_qf_bias_fit[ /gt3r_delta_time= 0..5058] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Height Bias Fit Quality Flag (Type is String) description: The height bias fit flag is set based on the value of the goodness of fit bias estimated as the difference between the centroid elevations of the observed surface water histogram and fitted integrated water surface model histogram. The flag values are set as follows: = -3 if H_bias_fit < -0.10 (m); -2 if -0.10 <= H_bias_fit < -0.05;-1 when -0.05 <= H_bias_fit < -0.01; 0 if -0.01 <= H_bias_fit < 0.01 (m); 1 if 0.01 <= H_bias_fit < 0.05; 2 if 0.05 < H_bias_fit < 0.10; 3 if 0.10 <= H_bias_fit; 4 if H_bias_fit is invalid. (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 equal_to_or_above_threshold6 invalid (Type is String) flag_values: -3, -2, -1, 0, 1, 2, 3, 4 (Type is Int32) valid_min: -3 (Type is Int32) valid_max: 4 (Type is Int32) origname: qf_bias_fit (Type is String) fullnamepath: /gt3r/qf_bias_fit (Type is String) coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String) gt3r_sseg_mean_lon[ /gt3r_delta_time= 0..5058] (Type is Float64) attributes units: degrees_east (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Short Segment Mean Longitude (Type is String) description: Mean longitude of the signal-qualified photons in a short segment. (Type is String) source: Inland Water ATBD (Type is String) valid_min: -180.00000000000000 (Type is Float64) valid_max: 180.00000000000000 (Type is Float64) origname: sseg_mean_lon (Type is String) fullnamepath: /gt3r/sseg_mean_lon (Type is String) coordinates: gt3r_delta_time (Type is String) gt3r_qf_ice[ /gt3r_delta_time= 0..5058] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Ice Quality Flag (Type is String) description: The quality flag for ice describes the likelihood of ice on the short water body surface segment. 0 for QF_Bckgrd<= 2; 1 for 2 < QF_Bckgrd<= 4; 2 for 4 < QF_Bckgrd; 3 for (4 < QF_Bckgrd and QF_Cloud=1) (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: qf_bckgrd_le_2 qf_bckgrd_le_4 qf_bckgrd_gt_4 qf_bckgrd_w_cloud (Type is String) flag_values: 0, 1, 2, 3 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 3 (Type is Int32) origname: qf_ice (Type is String) fullnamepath: /gt3r/qf_ice (Type is String) coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String) gt3r_inland_water_body_type[ /gt3r_delta_time= 0..5058] (Type is Int8) attributes _FillValue: 127 (Type is Int8) units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Body Type (Type is String) description: Type of Inland Water Body, where 1=Lake, 2=Known Reservoir, 3=(Reserved for future use), 4=Ephemeral Water, 5=River, 6=Estuary or Bay, 7=Coastal Water, 8=Reserved, 9=Reserved (Type is String) source: ATL13 ATBD, Section 5.3.1 (C) (Type is String) flag_meanings: Lake Known_Reservoir Reserved_for_future_use Ephemeral_Water River Estuary_or_Bay Coastal_Water Reserved Reserved (Type is String) flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 (Type is Int8) valid_min: 1 (Type is Int8) valid_max: 9 (Type is Int8) origname: inland_water_body_type (Type is String) fullnamepath: /gt3r/inland_water_body_type (Type is String) coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String) gt3r_inland_water_body_id[ /gt3r_delta_time= 0..5058] (Type is Int32) attributes contentType: referenceInformation (Type is String) long_name: Body ID (Type is String) description: Identifying signature of an individual inland water body. Each body of water is represented by a unique numeric value. (Type is String) source: ATL13 ATBD, Section 5.3.1 (C) (Type is String) _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) origname: inland_water_body_id (Type is String) fullnamepath: /gt3r/inland_water_body_id (Type is String) coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String) gt3r_segment_geoid[ /gt3r_delta_time= 0..5058] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: meters (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Segment Geoid (Type is String) description: Applicable geoid value at reporting location for all short segment statistics. (Type is String) source: ATL03 (Type is String) origname: segment_geoid (Type is String) fullnamepath: /gt3r/segment_geoid (Type is String) coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String) gt3r_qf_sseg_length[ /gt3r_delta_time= 0..5058] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Short Segment Length flag (Type is String) description: The Short Segment Length flag is set based on the length of the short segment. The flag is set as follows: 0 if sseg_length< 50 (meters); 1 if 50 <sseg_length < 150 (meters); 2 if 150 < sseg_length< 300 (meters); 3 if 300 < sseg_length. (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: below_threshold1 below_threshold2 below_threshold3 above_threshold4 (Type is String) flag_values: 0, 1, 2, 3 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 3 (Type is Int32) origname: qf_sseg_length (Type is String) fullnamepath: /gt3r/qf_sseg_length (Type is String) coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String) gt3r_qf_lseg_length[ /gt3r_delta_time= 0..5058] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Long Segment Length flag (Type is String) description: The Long Segment Length flag is set based on the length of the long segment. The flag is set as follows: 0 if Lseg_length < 500 (meters); 1 if 50 <= Lseg_length < 1500 (meters); 2 if 150 <= Lseg_length < 3000 (meters); 3 if 3000 <= Lseg_length (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: below_threshold1 below_threshold2 below_threshold3 above_threshold4 (Type is String) flag_values: 0, 1, 2, 3 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 3 (Type is Int32) origname: qf_lseg_length (Type is String) fullnamepath: /gt3r/qf_lseg_length (Type is String) coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String) gt3r_significant_wave_ht[ /gt3r_delta_time= 0..5058] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: meters (Type is String) contentType: physicalMeasurement (Type is String) long_name: SWH (Type is String) description: Significant wave height (Type is String) source: section 5.3.3 (C) (Type is String) origname: significant_wave_ht (Type is String) fullnamepath: /gt3r/significant_wave_ht (Type is String) coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String) gt3r_qf_bias_em[ /gt3r_delta_time= 0..5058] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: EM Bias Quality Flag (Type is String) description: The Electromagnetic Bias flag is set based on threshold checks for the estimated electromagnetic height bias. The flag is set as follows: -3 if H_bias_EM < -0.10 (m); -2 if -0.10 < H_bias_EM < -0.05; -1 if -0.05 <= H_bias_EM < -0.01; 0 if -0.01 <= H_bias_EM < 0.01 (m); 1 if 0.01 <= H_bias_EM < 0.05; 2 if 0.05 <= H_bias_EM < 0.10; 3 if 0.10 < H_bias_EM; 4 if H_bias_EM is invalid. (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 above_threshold6 invalid (Type is String) flag_values: -3, -2, -1, 0, 1, 2, 3, 4 (Type is Int32) valid_min: -3 (Type is Int32) valid_max: 4 (Type is Int32) origname: qf_bias_em (Type is String) fullnamepath: /gt3r/qf_bias_em (Type is String) coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String) gt3r_segment_id_end[ /gt3r_delta_time= 0..5058] (Type is Int32) attributes units: 1 (Type is String) contentType: referenceInformation (Type is String) long_name: Last ATL03 Segment ID (Type is String) description: Last ATL03 segment_id associated with the photons within this inland water segment. (Type is String) source: ATL03 (Type is String) origname: segment_id_end (Type is String) fullnamepath: /gt3r/segment_id_end (Type is String) coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String) gt3r_stdev_water_surf[ /gt3r_delta_time= 0..5058] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: meters (Type is String) contentType: referenceInformation (Type is String) long_name: Surface StDev (Type is String) description: Standard deviation of water surface, calculated over long segments with result reported at each short segment location tag contained within. (Type is String) source: section 5.3.3 (C) (Type is String) origname: stdev_water_surf (Type is String) fullnamepath: /gt3r/stdev_water_surf (Type is String) coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String) gt3r_qf_iwp[ /gt3r_delta_time= 0..5058] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) contentType: qualityInformation (Type is String) long_name: Inland Water Segment Processing Flag (Type is String) description: Inland Water segment Processing (IWP) flag to describe the level of processing the inland water algorithm was able to perform on each short segment based on the data available, ranging from 1 to 7. (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: 1_short_segment 2_short_segments 3_to_5_short_segments 6_to_7_short_segments 8_to_9_short_segments 10_to_29_short_segments 30_or_more_short_segments_analyzed (Type is String) flag_values: 1, 2, 3, 4, 5, 6, 7 (Type is Int32) valid_min: 1 (Type is Int32) valid_max: 7 (Type is Int32) origname: qf_iwp (Type is String) fullnamepath: /gt3r/qf_iwp (Type is String) coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String) gt3r_segment_id_beg[ /gt3r_delta_time= 0..5058] (Type is Int32) attributes units: 1 (Type is String) contentType: referenceInformation (Type is String) long_name: First ATL03 Segment ID (Type is String) description: First ATL03 segment_id associated with the photons within this inland water segment. (Type is String) source: ATL03 (Type is String) origname: segment_id_beg (Type is String) fullnamepath: /gt3r/segment_id_beg (Type is String) coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String) gt3r_cycle[ /gt3r_delta_time= 0..5058] (Type is Int8) attributes units: counts (Type is String) contentType: referenceInformation (Type is String) long_name: Cycle Number (Type is String) description: Tracks the number of 91-day cycles in the mission, beginning with 01. (Type is String) source: ATL03 (Type is String) valid_min: 0 (Type is Int8) valid_max: 50 (Type is Int8) origname: cycle (Type is String) fullnamepath: /gt3r/cycle (Type is String) coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String) gt3r_qf_subsurf_anomaly[ /gt3r_delta_time= 0..5058] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Subsurface Anomaly Quality Flag (Type is String) description: The subsurface anomaly flag is defined as in atbd section 4.5.5.5 above. It is computed for each bin between 6 Stdev below the mean of the integrated model to 20m depth. The anomaly is set to 0 when bin value +<+3* subsurface mean plus s~sub~subsurface and set to 1 when subsurface bin value is other (meaning an anomaly exists) (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: unlikely_subsurface likely_subsurface (Type is String) flag_values: 0, 1 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 1 (Type is Int32) origname: qf_subsurf_anomaly (Type is String) fullnamepath: /gt3r/qf_subsurf_anomaly (Type is String) coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String) gt3r_subsurface_attenuation[ /gt3r_delta_time= 0..5058] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: 1 (Type is String) contentType: physicalMeasurement (Type is String) long_name: Subsurface Attenuation (Type is String) description: Subsurface attenuation coefficient. (Type is String) source: section 5.3.4 (A) (Type is String) origname: subsurface_attenuation (Type is String) fullnamepath: /gt3r/subsurface_attenuation (Type is String) coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String) gt3r_inland_water_body_region[ /gt3r_delta_time= 0..5058] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: referenceInformation (Type is String) long_name: Body Region (Type is String) description: ATL13-created shapefile representing relevant bodies of water over which to implement the ATL13 water surface finding algorithm only within a region of processing interest. (Type is String) source: section 5.3.1 (A) (Type is String) origname: inland_water_body_region (Type is String) fullnamepath: /gt3r/inland_water_body_region (Type is String) coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String) gt3r_ice_flag[ /gt3r_delta_time= 0..5058] (Type is Int8) attributes units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Ice Flag (Type is String) description: Flag indicating significant existence of ice on the water surface (Type is String) source: section 5.3.2 (D) (Type is String) flag_meanings: no_ice ice (Type is String) flag_values: 0, 1 (Type is Int8) valid_min: 0 (Type is Int8) valid_max: 1 (Type is Int8) origname: ice_flag (Type is String) fullnamepath: /gt3r/ice_flag (Type is String) coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String) gt3r_segment_lon[ /gt3r_delta_time= 0..5058] (Type is Float64) attributes units: degrees_east (Type is String) contentType: physicalMeasurement (Type is String) long_name: Longitude (Type is String) standard_name: longitude (Type is String) description: Longitude of reporting location (Type is String) source: section 5.3.5 (A) (Type is String) valid_min: -180.00000000000000 (Type is Float64) valid_max: 180.00000000000000 (Type is Float64) origname: segment_lon (Type is String) fullnamepath: /gt3r/segment_lon (Type is String) coordinates: gt3r_delta_time gt3r_segment_lat (Type is String) gt3r_ht_ortho[ /gt3r_delta_time= 0..5058] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: meters (Type is String) contentType: physicalMeasurement (Type is String) long_name: Orthometric Height (Type is String) description: Orthometric height converted from ellipsoidal height. (Type is String) source: section 5.3.5 (A) (Type is String) origname: ht_ortho (Type is String) fullnamepath: /gt3r/ht_ortho (Type is String) coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String) gt3r_segment_lat[ /gt3r_delta_time= 0..5058] (Type is Float64) attributes units: degrees_north (Type is String) contentType: physicalMeasurement (Type is String) long_name: Latitude (Type is String) standard_name: latitude (Type is String) description: Latitude of reporting location (Type is String) source: section 5.3.5 (A) (Type is String) valid_min: -90.000000000000000 (Type is Float64) valid_max: 90.000000000000000 (Type is Float64) origname: segment_lat (Type is String) fullnamepath: /gt3r/segment_lat (Type is String) coordinates: gt3r_delta_time gt3r_segment_lon (Type is String) gt3r_ht_water_surf[ /gt3r_delta_time= 0..5058] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: meters (Type is String) contentType: physicalMeasurement (Type is String) long_name: Water Surface Height (Type is String) description: Water surface height with reference to WGS84 ellipsoid (Type is String) source: section 5.3.5 (A) (Type is String) origname: ht_water_surf (Type is String) fullnamepath: /gt3r/ht_water_surf (Type is String) coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String) gt3r_err_ht_water_surf[ /gt3r_delta_time= 0..5058] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Height Error (Type is String) description: Error included in heights reported in ht_water_surf. (Type is String) source: section 5.3.3 (C) (Type is String) origname: err_ht_water_surf (Type is String) fullnamepath: /gt3r/err_ht_water_surf (Type is String) coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String) gt3r_atl13refid[ /gt3r_delta_time= 0..5058] (Type is Int64) attributes _FillValue: 0 (Type is Int64) units: 1 (Type is String) contentType: referenceInformation (Type is String) long_name: ATL13 Reference ID (Type is String) description: Unique aggregate reference number for each shape in the ATL13 Inland Water Body Mask, where digit 1 = type, digit 2 = size, digit 3 = source, and digits 4-10 = shape id (Type is String) source: ATL13 ATBD, Section 5.3.1 (C) (Type is String) origname: atl13refid (Type is String) fullnamepath: /gt3r/atl13refid (Type is String) coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String) gt3r_qf_cloud[ /gt3r_delta_time= 0..5058] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Consolidated cloud flag (Type is String) description: This flag is a combination of multiple flags (cloud_flag_atm, cloud_flag_asr, and bsnow_con) and takes daytime/nighttime into consideration. A value of 1 means clouds or blowing snow are likely present. A value of 0 indicates the likely absence of clouds or blowing snow. From the ATL09 data closest to the segment time. (Type is String) source: ATL09 (Type is String) flag_meanings: likely_clear likely_cloudy (Type is String) flag_values: 0, 1 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 1 (Type is Int32) origname: qf_cloud (Type is String) fullnamepath: /gt3r/qf_cloud (Type is String) coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String) gt3r_inland_water_body_source[ /gt3r_delta_time= 0..5058] (Type is Int8) attributes _FillValue: 127 (Type is Int8) units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Body Source (Type is String) description: Source of Inland Water Body shape, where 1=HydroLAKES, 2=Global Lakes and Wetlands Database, 3=Named Marine Water Bodies, 4=GSHHG Shoreline, 5=Reserved, 6=Reserved, 7=Reserved, 8=Reserved, 9=Reserved (Type is String) source: ATL13 ATBD, Section 5.3.1 (C) (Type is String) flag_meanings: HydroLAKES Global_Lakes_and_Wetlands_Database Named_Marine_Water_Bodies GSHHG_Shoreline Reserved Reserved Reserved Reserved Reserved (Type is String) flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 (Type is Int8) valid_min: 1 (Type is Int8) valid_max: 9 (Type is Int8) origname: inland_water_body_source (Type is String) fullnamepath: /gt3r/inland_water_body_source (Type is String) coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String) gt3r_inland_water_body_size[ /gt3r_delta_time= 0..5058] (Type is Int8) attributes _FillValue: 127 (Type is Int8) units: 1 (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Body Size (Type is String) description: Size of Inland Water Body, A=area, where 1=A>10,000 km2, 2=10,000>A>=1,000, 3=1,000>A>=100, 4=100>A>=10, 5=10>A>=1, 6=1>A>=0.1, 7=0.01>A, 8=Reserved, 9=Reserved (Type is String) source: ATL13 ATBD, Section 5.3.1 (C) (Type is String) flag_meanings: A>10000 10000>A>=1000 1000>A>=100 100>A>=10 10>A>=1 1>A>=0.1 0.01>A Reserved Reserved (Type is String) flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 (Type is Int8) valid_min: 1 (Type is Int8) valid_max: 9 (Type is Int8) origname: inland_water_body_size (Type is String) fullnamepath: /gt3r/inland_water_body_size (Type is String) coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String) gt3r_err_slope_trk[ /gt3r_delta_time= 0..5058] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Slope Error (Type is String) description: Error included in segment_slope_trk_local. (Type is String) source: section 5.3.3 (C) (Type is String) origname: err_slope_trk (Type is String) fullnamepath: /gt3r/err_slope_trk (Type is String) coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String) gt3r_segment_slope_trk_bdy[ /gt3r_delta_time= 0..5058] (Type is Float32) attributes _FillValue: 3.402823466e+38 (Type is Float32) units: 1 (Type is String) contentType: physicalMeasurement (Type is String) long_name: Water Body Slope (Type is String) description: Along track water body surface slope. (Type is String) source: section 5.3.5 (A) (Type is String) origname: segment_slope_trk_bdy (Type is String) fullnamepath: /gt3r/segment_slope_trk_bdy (Type is String) coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String) gt3r_sseg_mean_lat[ /gt3r_delta_time= 0..5058] (Type is Float64) attributes _FillValue: 1.7976931348623157e+308 (Type is Float64) units: degrees_north (Type is String) contentType: auxiliaryInformation (Type is String) long_name: Short Segment Mean Latitude (Type is String) description: Mean latitude of the signal-qualified photons in a short segment. (Type is String) source: Inland Water ATBD (Type is String) valid_min: -90.000000000000000 (Type is Float64) valid_max: 90.000000000000000 (Type is Float64) origname: sseg_mean_lat (Type is String) fullnamepath: /gt3r/sseg_mean_lat (Type is String) coordinates: gt3r_delta_time (Type is String) gt3r_qf_spec_width[ /gt3r_delta_time= 0..5058] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Spectral Width Flag (Type is String) description: The Spectral Width flag is set based on threshold checks for the estimated Spectral Width. The flag is set as follows: 0 if spec_width < 0.5; 1 if spec_width >= +0.5. (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: below_0.5 above_0.5 (Type is String) flag_values: 0, 1 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 1 (Type is Int32) origname: qf_spec_width (Type is String) fullnamepath: /gt3r/qf_spec_width (Type is String) coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String) gt3r_qf_bckgrd[ /gt3r_delta_time= 0..5058] (Type is Int32) attributes _FillValue: 2147483647 (Type is Int32) units: 1 (Type is String) contentType: qualityInformation (Type is String) long_name: Background Quality Flag (Type is String) description: Describes the degree of background photons present in each short segment. bckgrd_dnsty_threshold1= 0.001 (counts per bi per Lseg); bckgrd_dnsty_threshold2= 0.01 (counts per bin per Lseg); bckgrd_dnsty_threshold3= 0.05 (counts per bin per Lseg); bckgrd_dnsty_threshold4= 0.1 (counts per bin per Lseg); bckgrd_dnsty_threshold5= 0.3 (counts per bin per Lseg); bckgrd_dnsty_threshold6= 0.5 (counts per bin per Lseg) (Type is String) source: Inland Water ATBD (Type is String) flag_meanings: equal_to_or_below_threshold1 equal_to_or_below_threshold2 equal_to_or_below_threshold3 equal_to_or_below_threshold4 equal_to_or_below_threshold5 equal_to_or_below_threshold6 above_threshold6 (Type is String) flag_values: 0, 1, 2, 3, 4, 5, 6 (Type is Int32) valid_min: 0 (Type is Int32) valid_max: 6 (Type is Int32) origname: qf_bckgrd (Type is String) fullnamepath: /gt3r/qf_bckgrd (Type is String) coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon (Type is String) gt3r_sseg_mean_time[ /gt3r_delta_time= 0..5058] (Type is Float64) attributes contentType: auxiliaryInformation (Type is String) long_name: Short Segment Mean Time (Type is String) description: Mean time of the signal-qualified photons in a short segment. (Type is String) source: Inland Water ATBD (Type is String) _FillValue: 1.7976931348623157e+308 (Type is Float64) units: Seconds since 2018-01-01 (Type is String) origname: sseg_mean_time (Type is String) fullnamepath: /gt3r/sseg_mean_time (Type is String) coordinates: gt3r_delta_time (Type is String)

dataset: ATL13_20190330212241_00250301_001_01.h5
dmr

OPeNDAP Hyrax (1.17.0)
Documentation Questions? Contact Support

dataset: ATL13_20190330212241_00250301_001_01.h5 dmr

OPeNDAP Hyrax (1.17.0) Documentation Questions? Contact Support

dataset: ATL13_20190330212241_00250301_001_01.h5
dmr

OPeNDAP Hyrax (1.17.0)
Documentation Questions? Contact Support