| short_name: | ATL17 |
| level: | L3B |
| title: | SET_BY_META |
| description: | The ICESat-2 ATL17 atmosphere gridded standard data product reports monthly global cloud fraction, global aerosol fraction, total column optical depth over water, polar cloud fraction, polar blowing snow frequency, global and polar apparent surface reflectivity, global and polar ground detection frequency, unique global and polar observation counts, and atmosphere gridded parameter statistical values. |
| Conventions: | CF-1.6 |
| contributor_name: | Thomas A Neumann (thomas.neumann@nasa.gov), Stephen P Palm (stephen.p.palm@nasa.gov), Suneel K Bhardwaj (suneel.k.bhardwaj@nasa.gov), David W Hancock III (david.w.hancock@nasa.gov) |
| contributor_role: | Project Scientist, Atmosphere Scientist, SDMS Data Producer, ASAS Data Producer |
| date_type: | UTC |
| featureType: | gridded |
| geospatial_lat_units: | degrees_north |
| geospatial_lon_units: | degrees_east |
| granule_type: | ATL17 |
| identifier_product_doi_authority: | http://dx.doi.org |
| 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. |
| naming_authority: | http://dx.doi.org |
| spatial_coverage_type: | Horizontal |
| standard_name_vocabulary: | CF-1.6 |
| time_type: | CCSDS UTC-A |
| date_created: | 2021-03-29T15:33:57.000000Z |
| hdfversion: | HDF5 1.10.3 |
| history: | 2021-03-29T15:33:57.000000Z;5461d013-edb2-3a99-9943-40e30732e1b1;Created by PGE atlas_l3b_atm Version 1.2 |
| identifier_file_uuid: | 5461d013-edb2-3a99-9943-40e30732e1b1 |
| identifier_product_format_version: | 1.2 |
| time_coverage_duration: | 2681602.0000000000 |
| time_coverage_end: | 2021-01-01T01:01:36.000000Z |
| time_coverage_start: | 2020-12-01T00:08:14.000000Z |
| geospatial_lat_min: | -88.051207527615688 |
| geospatial_lon_min: | -179.99999723446058 |
| geospatial_lat_max: | 88.039535527705837 |
| geospatial_lon_max: | 179.99999908071140 |
| publisher_name: | NSIDC DAAC > NASA National Snow and Ice Data Center Distributed Active Archive Center |
| publisher_email: | nsidc@nsidc.org |
| publisher_url: | https://nsidc.org/daac/ |
| identifier_product_type: | ATL17 |
| identifier_product_doi: | doi:10.5067/ATLAS/ATL17.003 |
| institution: | National Aeronautics and Space Administration (NASA) |
| creator_name: | GSFC I-SIPS > ICESat-2 Science Investigator-led Processing System |
| summary: | The purpose of ATL17 is to provide a gridded summary of monthly global cloud fraction, total column optical depth over the oceans, polar cloud fraction, blowing snow frequency, apparent surface reflectivity, and ground detection frequency. |
| keywords: | EARTH SCIENCE > SPECTRAL/ENGINEERING > LIDAR > LIDAR BACKSCATTER > NONE > NONE > NONE |
| keywords_vocabulary: | NASA/GCMD Science Keywords |
| 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. |
| processing_level: | 3B |
| references: | http://nsidc.org/data/icesat2/data.html |
| project: | ICESat-2 > Ice, Cloud, and land Elevation Satellite-2 |
| instrument: | ATLAS > Advanced Topographic Laser Altimeter System |
| platform: | ICESat-2 > Ice, Cloud, and land Elevation Satellite-2 |
| source: | Spacecraft |
| CLASS: | IMAGE |
| IMAGE_VERSION: | 1.2 |
| IMAGE_SUBCLASS: | IMAGE_TRUECOLOR |
| INTERLACE_MODE: | INTERLACE_PIXEL |
| origname: | global_grnd_detect_img |
| fullnamepath: | /global_grnd_detect_img |
| CLASS: | IMAGE |
| IMAGE_VERSION: | 1.2 |
| IMAGE_SUBCLASS: | IMAGE_TRUECOLOR |
| INTERLACE_MODE: | INTERLACE_PIXEL |
| origname: | global_asr_img |
| fullnamepath: | /global_asr_img |
| _FillValue: | 3.402823466e+38 |
| long_name: | Global (Over Water) Total Column Optical Depth (0-1.5) |
| units: | 1 |
| source: | ATM L3B ATBD, Section 3.2, Section 5.0, Table 5. |
| valid_min: | 0.000000000 |
| valid_max: | 1.500000000 |
| contentType: | modelResult |
| description: | The global (over water) average total column optical depth two-dimensional atmospheric gridded parameter. For each global grid cell this represents the ratio of the summation of the valid over-water (column_od_asr_qf () = 4 for water) column optical depth 25 Hz (high-rate profile) observations (column_od_asr () .ne. INVALID) to the number of valid over-water column optical depth 25 Hz (high-rate profile) observations (tcod_obs_grid (i,j)) in that cell. The average over-water global total column optical depth values are produced when the number of valid over-water column optical depth 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (tcod_obs_grid (i,j) => obs_minimum); otherwise set to INVALID. The ATL09 required total column optical depth (column_od_asr ()) is estimated from the apparent surface reflectance (ASR) and the assumed actual surface reflectance. The required total column optical depth from ASR quality flag (column_od_asr_qf ()) supplies the reflecting surface type for over-water surface determination. Both ATL09 parameters are supplied from the L3A ATM high-rate profile processing. The 0.0 to 1.5 value range constraint is applied to the global image, and is not applied to the gridded parameter values. Grid array organization: global_column_od (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given monthly global_grid_lon_scale = 1.0 degrees and global_grid_lat_scale = 1.0 degrees, gridded array dimension: global_column_od (360,180), type: floating point. Reference: global_column_od (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the global projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "global_column_od_img" in the ATL17 product. The applicable global observation counts for this atmosphere gridded parameter are available from: tcod_obs_grid (i,j). Expected value range: minimum: 0.0, maximum: 1.5. Maximum value may exceed 1.5 (e.g., 2.94870949). Image will be limited to the range of 0.0 to 1.5. |
| coordinates: | global_grid_lon global_grid_lat |
| origname: | global_column_od |
| fullnamepath: | /global_column_od |
| long_name: | global apparent surface reflectance observation grid |
| units: | 1 |
| source: | ATM L3B ATBD, Section 3.9, Table 4., Section 5.0, Table 5. |
| contentType: | modelResult |
| description: | The global apparent surface reflectance (ASR) observation count two-dimensional gridded parameter. The number of observations used to compute the average global apparent surface reflectance (ASR). Only surface signal detected ASR 25 Hz (high-rate profile) observations (apparent_surf_reflec () > 0.0) in each grid cell are used to compute the cell global ASR (global_asr (i,j)). Grid array organization: global_asr_obs_grid (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the monthly global_grid_lon_scale = 1.0 degrees and the global_grid_lat_scale = 1.0 degrees, the monthly global gridded array dimension is: global_asr_obs_grid (360,180), type: floating point . Reference: global_asr_obs_grid (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the global projection array. The global observation counts are applicable to the atmosphere gridded parameter: global_asr (i,j). |
| coordinates: | global_grid_lon global_grid_lat |
| origname: | global_asr_obs_grid |
| fullnamepath: | /global_asr_obs_grid |
| _FillValue: | 3.402823466e+38 |
| long_name: | Global Aerosol Fraction |
| units: | fraction |
| source: | ATM L3B ATBD, Section 3.1.1, Section 5.0, Table 5. |
| valid_min: | 0.000000000 |
| valid_max: | 1.000000000 |
| contentType: | modelResult |
| description: | The global aerosol fraction two-dimensional atmospheric gridded parameter. For each global grid cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one aerosol layer (layer_attr (,) = 2 within cloud_flag_atm () layers) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded global aerosol fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The ATL09 required number of layers (cloud_flag_atm ()) and the layer attribute flag (layer_attr (,)) are determined from the backscatter profile using the DDA layer finder in the L3A ATM high-rate profile processing. Grid array organization: global_aerosol_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the monthly global_grid_lon_scale = 1.0 degrees and the global_grid_lat_scale = 1.0 degrees, the global gridded array dimension is: global_aerosol_frac (360,180), type: floating point. Reference: global_aerosol_frac (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the global projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "global_aerosol_frac_img" in the ATL17 product. The applicable global observation counts for this atmosphere gridded parameter are available from: global_cloud_aerosol_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. |
| coordinates: | global_grid_lon global_grid_lat |
| origname: | global_aerosol_frac |
| fullnamepath: | /global_aerosol_frac |
| _FillValue: | 3.402823466e+38 |
| long_name: | Global Ground Detection Frequency (fraction) |
| units: | fraction |
| source: | ATM L3B ATBD, Section 3.6, Section 5.0, Table 5. |
| valid_min: | 0.000000000 |
| valid_max: | 1.000000000 |
| contentType: | modelResult |
| description: | The global ground detection frequency two-dimensional atmospheric gridded parameter. For each global grid cell this represents the number of detected surface signal 25 Hz (high-rate profile) observations (surface_sig () > 0.0) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded global ground detection values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The calculation results in a fractional value. The ATL09 required detected surface signal (surface_sig ()) is determined from the surface signal count of the number of photons in the detected surface bin in the L3A ATM high-rate profile processing. Grid array organization: global_grnd_detect (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given monthly global_grid_lon_scale = 1.0 degrees and global_grid_lat_scale = 1.0 degrees, gridded array dimension: global_grnd_detect (360,180), type: floating point. Reference: global_grnd_detect (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the global projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "global_ground_detect_img" in the ATL17 product. The applicable global observation counts for this atmosphere gridded parameter are available from: global_cloud_aerosol_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. |
| coordinates: | global_grid_lon global_grid_lat |
| origname: | global_grnd_detect |
| fullnamepath: | /global_grnd_detect |
| long_name: | global aerosol fraction mean value |
| units: | fraction |
| source: | L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. |
| valid_min: | 0.000000000 |
| valid_max: | 1.000000000 |
| contentType: | qualityInformation |
| description: | The global aerosol fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. |
| origname: | global_aerosol_frac_mean |
| fullnamepath: | /quality_assessment/atmosphere/global_aerosol_frac_mean |
| long_name: | global apparent surface reflectance mean value |
| units: | 1 |
| source: | L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. |
| valid_min: | 0.000000000 |
| valid_max: | 3.000000000 |
| contentType: | qualityInformation |
| description: | The global apparent surface reflectance gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.57377338). |
| origname: | global_asr_mean |
| fullnamepath: | /quality_assessment/atmosphere/global_asr_mean |
| long_name: | global aerosol fraction minimum value |
| units: | fraction |
| source: | L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. |
| valid_min: | 0.000000000 |
| valid_max: | 1.000000000 |
| contentType: | qualityInformation |
| description: | The global aerosol fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. |
| origname: | global_aerosol_frac_min |
| fullnamepath: | /quality_assessment/atmosphere/global_aerosol_frac_min |
| long_name: | global apparent surface reflectance standard deviation value |
| units: | 1 |
| source: | L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. |
| valid_min: | 0.000000000 |
| valid_max: | 3.000000000 |
| contentType: | qualityInformation |
| description: | The global apparent surface reflectance gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.57377338). |
| origname: | global_asr_sdev |
| fullnamepath: | /quality_assessment/atmosphere/global_asr_sdev |
| long_name: | global ground detection frequency mean value |
| units: | fraction |
| source: | L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. |
| valid_min: | 0.000000000 |
| valid_max: | 1.000000000 |
| contentType: | qualityInformation |
| description: | The global ground detection frequency gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. |
| origname: | global_grnd_detect_mean |
| fullnamepath: | /quality_assessment/atmosphere/global_grnd_detect_mean |
| long_name: | global aerosol fraction standard deviation value |
| units: | fraction |
| source: | L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. |
| valid_min: | 0.000000000 |
| valid_max: | 1.000000000 |
| contentType: | qualityInformation |
| description: | The global aerosol fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. |
| origname: | global_aerosol_frac_sdev |
| fullnamepath: | /quality_assessment/atmosphere/global_aerosol_frac_sdev |
| long_name: | global apparent surface reflectance minimum value |
| units: | 1 |
| source: | L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. |
| valid_min: | 0.000000000 |
| valid_max: | 3.000000000 |
| contentType: | qualityInformation |
| description: | The global apparent surface reflectance gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.57377338). |
| origname: | global_asr_min |
| fullnamepath: | /quality_assessment/atmosphere/global_asr_min |
| long_name: | global ground detection frequency minimum value |
| units: | fraction |
| source: | L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. |
| valid_min: | 0.000000000 |
| valid_max: | 1.000000000 |
| contentType: | qualityInformation |
| description: | The global ground detection frequency gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. |
| origname: | global_grnd_detect_min |
| fullnamepath: | /quality_assessment/atmosphere/global_grnd_detect_min |
| long_name: | global ground detection frequency maximum value |
| units: | fraction |
| source: | L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. |
| valid_min: | 0.000000000 |
| valid_max: | 1.000000000 |
| contentType: | qualityInformation |
| description: | The global ground detection frequency gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. |
| origname: | global_grnd_detect_max |
| fullnamepath: | /quality_assessment/atmosphere/global_grnd_detect_max |
| long_name: | global ground detection frequency standard deviation value |
| units: | fraction |
| source: | L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. |
| valid_min: | 0.000000000 |
| valid_max: | 1.000000000 |
| contentType: | qualityInformation |
| description: | The global ground detection frequency gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. |
| origname: | global_grnd_detect_sdev |
| fullnamepath: | /quality_assessment/atmosphere/global_grnd_detect_sdev |
| long_name: | global (over water) total column optical depth mean value |
| units: | 1 |
| source: | L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. |
| valid_min: | 0.000000000 |
| valid_max: | 4.000000000 |
| contentType: | qualityInformation |
| description: | The global (over water) total column optical depth gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.5. Maximum value may exceed 1.5 (e.g., 2.94870949). |
| origname: | global_column_od_mean |
| fullnamepath: | /quality_assessment/atmosphere/global_column_od_mean |
| long_name: | global (over water) total column optical depth maximum value |
| units: | 1 |
| source: | L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. |
| valid_min: | 0.000000000 |
| valid_max: | 4.000000000 |
| contentType: | qualityInformation |
| description: | The global (over water) total column optical depth gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.5. Maximum value may exceed 1.5 (e.g., 2.94870949). |
| origname: | global_column_od_max |
| fullnamepath: | /quality_assessment/atmosphere/global_column_od_max |
| long_name: | global (over water) total column optical depth standard deviation value |
| units: | 1 |
| source: | L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. |
| valid_min: | 0.000000000 |
| valid_max: | 4.000000000 |
| contentType: | qualityInformation |
| description: | The global (over water) total column optical depth gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.5. Maximum value may exceed 1.5 (e.g., 2.94870949). |
| origname: | global_column_od_sdev |
| fullnamepath: | /quality_assessment/atmosphere/global_column_od_sdev |
| long_name: | global (over water) total column optical depth minimum value |
| units: | 1 |
| source: | L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. |
| valid_min: | 0.000000000 |
| valid_max: | 4.000000000 |
| contentType: | qualityInformation |
| description: | The global (over water) total column optical depth gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.5. Maximum value may exceed 1.5 (e.g., 2.94870949). |
| origname: | global_column_od_min |
| fullnamepath: | /quality_assessment/atmosphere/global_column_od_min |
| long_name: | global cloud fraction minimum value |
| units: | fraction |
| source: | L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. |
| valid_min: | 0.000000000 |
| valid_max: | 1.000000000 |
| contentType: | qualityInformation |
| description: | The global cloud fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. |
| origname: | global_cloud_frac_min |
| fullnamepath: | /quality_assessment/atmosphere/global_cloud_frac_min |
| long_name: | global apparent surface reflectance maximum value |
| units: | 1 |
| source: | L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. |
| valid_min: | 0.000000000 |
| valid_max: | 3.000000000 |
| contentType: | qualityInformation |
| description: | The global apparent surface reflectance gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.57377338). |
| origname: | global_asr_max |
| fullnamepath: | /quality_assessment/atmosphere/global_asr_max |
| long_name: | global aerosol fraction maximum value |
| units: | fraction |
| source: | L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. |
| valid_min: | 0.000000000 |
| valid_max: | 1.000000000 |
| contentType: | qualityInformation |
| description: | The global aerosol fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. |
| origname: | global_aerosol_frac_max |
| fullnamepath: | /quality_assessment/atmosphere/global_aerosol_frac_max |
| long_name: | global cloud fraction maximum value |
| source: | L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. |
| valid_min: | 0.000000000 |
| valid_max: | 1.000000000 |
| contentType: | qualityInformation |
| description: | The global cloud fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. |
| units: | fraction |
| origname: | global_cloud_frac_max |
| fullnamepath: | /quality_assessment/atmosphere/global_cloud_frac_max |
| long_name: | global cloud fraction standard deviation value |
| units: | fraction |
| source: | L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. |
| valid_min: | 0.000000000 |
| valid_max: | 1.000000000 |
| contentType: | qualityInformation |
| description: | The global cloud fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. |
| origname: | global_cloud_frac_sdev |
| fullnamepath: | /quality_assessment/atmosphere/global_cloud_frac_sdev |
| long_name: | global cloud fraction mean value |
| units: | fraction |
| source: | L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. |
| valid_min: | 0.000000000 |
| valid_max: | 1.000000000 |
| contentType: | qualityInformation |
| description: | The global cloud fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. |
| origname: | global_cloud_frac_mean |
| fullnamepath: | /quality_assessment/atmosphere/global_cloud_frac_mean |
| CLASS: | IMAGE |
| IMAGE_VERSION: | 1.2 |
| IMAGE_SUBCLASS: | IMAGE_TRUECOLOR |
| INTERLACE_MODE: | INTERLACE_PIXEL |
| origname: | global_column_od_img |
| fullnamepath: | /global_column_od_img |
| long_name: | global cloud and aerosol fraction observation grid |
| units: | 1 |
| source: | ATM L3B ATBD, Section 3.9, Table 4., Section 5.0, Table 5. |
| contentType: | modelResult |
| description: | The global cloud fraction and aerosol fraction observation count two-dimensional gridded parameter. The number of observations used to compute the global cloud fraction and the global aerosol fraction. This number represents all 25 Hz (high-rate profile) observations in each cell. Only 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1) in each grid cell are used to compute the cell global cloud fraction (global_cloud_frac (i,j)). Only 25 Hz (high-rate profile) observations with at least one aerosol layer (layer_attr (,) = 2) in each grid cell are used to compute the cell global aerosol fraction (global_aerosol_frac (i,j)). Given equivalent 25 Hz (high-rate profile) observation counts for cloud fraction and aerosol fraction, this grid array is loaded from the global cloud fraction total observation counts. Grid array organization: global_cloud_aerosol_obs_grid (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the monthly global_grid_lon_scale = 1.0 degrees and the global_grid_lat_scale = 1.0 degrees, the monthly global gridded array dimension is: global_cloud_aerosol_obs_grid (360,180), type: floating point. Reference: global_cloud_aerosol_obs_grid (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the global projection array. The global observation counts are applicable to these atmosphere gridded parameters: global_cloud_frac (i,j), global_aerosol_frac (i,j), and global_grnd_detect (i,j). |
| coordinates: | global_grid_lon global_grid_lat |
| origname: | global_cloud_aerosol_obs_grid |
| fullnamepath: | /global_cloud_aerosol_obs_grid |
| _FillValue: | 3.402823466e+38 |
| long_name: | Global Apparent Surface Reflectance (0-1) |
| units: | 1 |
| source: | ATM L3B ATBD, Section 3.5, Section 5.0, Table 5. |
| valid_min: | 0.000000000 |
| valid_max: | 1.000000000 |
| contentType: | modelResult |
| description: | The global average apparent surface reflectance (ASR) two-dimensional atmospheric gridded parameter. For each global grid cell this represents the ratio of the summation of the detected surface signal apparent surface reflectivity 25 Hz (high-rate profile) observations (apparent_surf_reflec () > 0.0) to the number of detected surface signal ASR 25 Hz (high-rate profile) observations (global_asr_obs_grid (i,j)) in the cell. The gridded average global ASR values are produced when the number of detected surface signal ASR 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (global_asr_obs_grid (i,j) => obs_minimum); otherwise set to INVALID. ASR represents the true surface reflectivity modified by the two-way atmospheric transmission. Generally a number between 0.0 and 1.0. ASR is related to the ratio of the received energy to the transmitted energy, assuming a Lambertian surface reflectance. The ATL09 required surface signal apparent surface reflectance (apparent_surf_reflec ()) values are determined in the L3A ATM high-rate profile processing. Grid array organization: global_asr (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the monthly global_grid_lon_scale = 1.0 degrees and the global_grid_lat_scale = 1.0 degrees, the gridded array dimension is: global_asr (360,180), type: floating point. Reference: global_asr (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the global projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "global_asr_img" in the ATL17 product. The applicable global observation counts for this atmosphere gridded parameter are available from: global_asr_obs_grid (i,j). Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.5737738). Image will be limited to the range of 0.0 to 1.0. |
| coordinates: | global_grid_lon global_grid_lat |
| origname: | global_asr |
| fullnamepath: | /global_asr |
| long_name: | global grid latitude scale control |
| units: | degrees/cell |
| source: | Atmosphere ATBD, Section 1.0, Table 2., Section 5.0, Table 6. |
| contentType: | referenceInformation |
| description: | The global_grid_lat_scale is a scalar control parameter presenting the global grid cell latitude resolution (scale), in degrees per cell. The nominal [default] global_grid_lat_scale value is 1.0 degrees global latitude grid cell size for the monthly ATL17 product. An execution override is provided within the production environment for replacement of the control parameter value. Type: floating point. |
| origname: | global_grid_lat_scale |
| fullnamepath: | /ancillary_data/atmosphere/global_grid_lat_scale |
| long_name: | global grid longitude scale control |
| units: | degrees/cell |
| source: | Atmosphere ATBD, Section 1.0, Table 2., Section 5.0, Table 6. |
| contentType: | referenceInformation |
| description: | The global_grid_lon_scale is a scalar control parameter presenting the global grid cell longitude resolution (scale), in degrees per cell. The nominal [default] global_grid_lon_scale value is 1.0 degrees global longitude grid cell size for the monthly ATL17 product. An execution override is provided within the production environment for replacement of the control parameter value. Type: floating point. |
| origname: | global_grid_lon_scale |
| fullnamepath: | /ancillary_data/atmosphere/global_grid_lon_scale |
| _FillValue: | 3.402823466e+38 |
| long_name: | Global Cloud Fraction |
| units: | fraction |
| source: | ATM L3B ATBD, Section 3.1, Section 5.0, Table 5. |
| valid_min: | 0.000000000 |
| valid_max: | 1.000000000 |
| contentType: | modelResult |
| description: | The global cloud fraction two-dimensional atmospheric gridded parameter. For each global grid cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1 within cloud_flag_atm () layers) to the number of all 25 Hz (high-rate profile) observations (global_cloud_aerosol_obs_grid (i,j)) in the cell. The gridded global cloud fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (global_cloud_aerosol_obs_grid (i,j) => obs_minimum); otherwise set to INVALID. The ATL09 required number of layers (cloud_flag_atm ()) and the layer attribute flag (layer_attr (,)) are determined from the backscatter profile using the DDA layer finder in the L3A ATM high-rate profile processing. A cloud fraction value of 0.0 represents a totally cloud free grid cell; a cloud fraction value of 1.0 indicates the grid cell is completely covered with clouds. Grid array organization: global_cloud_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given monthly global_grid_lon_scale = 1.0 degrees and global_grid_lat_scale = 1.0 degrees, gridded array dimension: global_cloud_frac (360,180), type: floating point. Reference: global_cloud_frac (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the global projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "global_cloud_frac_img" in the ATL17 product. The applicable global observation counts for this atmosphere gridded parameter are available from: global_cloud_aerosol_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. |
| coordinates: | global_grid_lon global_grid_lat |
| origname: | global_cloud_frac |
| fullnamepath: | /global_cloud_frac |
| CLASS: | IMAGE |
| IMAGE_VERSION: | 1.2 |
| IMAGE_SUBCLASS: | IMAGE_TRUECOLOR |
| INTERLACE_MODE: | INTERLACE_PIXEL |
| origname: | global_aerosol_frac_img |
| fullnamepath: | /global_aerosol_frac_img |
| CLASS: | IMAGE |
| IMAGE_VERSION: | 1.2 |
| IMAGE_SUBCLASS: | IMAGE_TRUECOLOR |
| INTERLACE_MODE: | INTERLACE_PIXEL |
| origname: | global_cloud_frac_img |
| fullnamepath: | /global_cloud_frac_img |
| long_name: | global grid latitude |
| standard_name: | latitude |
| units: | degrees_north |
| source: | ATM L3B ATBD, Section 2.0, Section 5.0, Table 5. |
| valid_min: | -90.000000000000000 |
| valid_max: | 90.000000000000000 |
| contentType: | referenceInformation |
| description: | The global grid latitude one-dimensional array parameter, with the latitudes applicable to each global grid cell. ATL09 ATM histogram top latitude (latitude ()) derived from the ATM range window geolocation. Based on WGS84 Earth-centered, Earth-fixed terrestrial reference system and geodetic data. Direction: North=+ values. Range of latitude values: -90.0 to +90.0 degrees, with a step size of global_grid_lat_scale. Grid array organization: global_grid_lat (j), where j=latitude index, as per ATBD Section 2.0. Given monthly global_grid_lat_scale = 1.0 degrees, array dimension: global_grid_lat (180), type: double precision. Comprises the y-grid axis for global gridded parameters. Reference: global_grid_lat (1) = -90.0 degrees, at the lower left corner of a global gridded parameter cell location (i,j) = (1,1). |
| coordinates: | global_grid_lat |
| origname: | global_grid_lat |
| fullnamepath: | /global_grid_lat |
| long_name: | global grid longitude |
| standard_name: | longitude |
| units: | degrees_east |
| source: | ATM L3B ATBD, Section 2.0, Section 5.0, Table 5. |
| valid_min: | -180.00000000000000 |
| valid_max: | 180.00000000000000 |
| contentType: | referenceInformation |
| description: | The global grid longitude one-dimensional array parameter, with the longitudes applicable to each global grid cell. The ATL09 ATM histogram top longitude (longitude()) derived from the ATM range window geolocation. Based on WGS84 Earth-centered, Earth-fixed terrestrial reference system and geodetic data. Direction: East=+ values. Range of longitude values: -180.0 to +180.0 degrees, with a step size of global_grid_lon_scale. Grid array organization: global_grid_lon (i), where i=longitude index, as per ATBD Section 2.0. Given monthly global_grid_lon_scale = 1.0 degrees, array dimension: global_grid_lon (360), type: double precision. Comprises the x-grid axis for global gridded parameters. Reference: global_grid_lon (1) = -180.0 degrees, at the lower left corner of a global gridded parameter cell location (i,j) = (1,1). |
| coordinates: | global_grid_lon |
| origname: | global_grid_lon |
| fullnamepath: | /global_grid_lon |
| Unlimited_Dimension: | global_grid_lat, global_grid_lon, npolar_grid_lat, npolar_grid_lon, orbit_info_crossing_time, orbit_info_sc_orient_time, spolar_grid_lat, spolar_grid_lon |
| delta_time_end: | Array of 64 bit Reals [FakeDim0 = 0..0] long_name: end time standard_name: time units: seconds since 2018-01-01 source: L3B ATM ATBD, Section 5.0, Table 5. contentType: auxiliaryInformation description: The end time scalar parameter (end_time). The end time/date of the data used to make the product. Number of GPS seconds since the ATLAS SDP epoch at the end of the data collection. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. Type: double precision. origname: delta_time_end fullnamepath: /delta_time_end |
| npolar_grnd_detect: | Array of 32 bit Reals [npolar_grid_lat = 0..59][npolar_grid_lon = 0..239] _FillValue: 3.402823466e+38 long_name: North Polar Ground Detection Frequency (fraction) units: fraction source: ATM L3B ATBD, Section 3.6, Section 5.0, Table 5. valid_min: 0.000000000 valid_max: 1.000000000 contentType: modelResult description: The north polar ground detection frequency two-dimensional atmospheric gridded parameter. For each north polar grid cell this represents the number of detected surface signal 25 Hz (high-rate profile) observations (surface_sig () > 0.0) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded north polar ground detection values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The calculation results in a fractional value. The ATL09 required detected surface signal (surface_sig ()) is determined from the surface signal count of the number of photons in the detected surface bin in the L3A ATM high-rate profile processing. Grid array organization: npolar_grnd_detect (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the monthly polar_grid_lon_scale = 1.5 degrees and the polar_grid_lat_scale = 0.5 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the monthly gridded array dimension is: npolar_grnd_detect (240,60), type: floating point. Reference: npolar_grnd_detect (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "npolar_grnd_detect_img" in the ATL17 product. The applicable north polar observation counts for this atmosphere gridded parameter are available from: npolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. coordinates: npolar_grid_lon npolar_grid_lat origname: npolar_grnd_detect fullnamepath: /npolar_grnd_detect |
| orbit_info_cycle_number: | Array of 16 bit Integers [orbit_info_crossing_time = 0..436] long_name: Cycle Number units: 1 valid_min: 0 valid_max: 50 contentType: referenceInformation description: A count of the number of exact repeats of this reference orbit. Type: integer*1. source: Operations origname: cycle_number fullnamepath: /orbit_info/cycle_number coordinates: orbit_info_crossing_time |
| orbit_info_orbit_number: | Array of 16 bit Unsigned integers [orbit_info_crossing_time = 0..436] long_name: Orbit Number units: 1 source: Operations valid_min: 1 valid_max: 65000 contentType: referenceInformation description: Unique identifying number for each planned ICESat-2 orbit. origname: orbit_number fullnamepath: /orbit_info/orbit_number coordinates: orbit_info_crossing_time |
| orbit_info_lan: | Array of 64 bit Reals [orbit_info_crossing_time = 0..436] long_name: Ascending Node Longitude units: degrees_east source: POD/PPD valid_min: -180.00000000000000 valid_max: 180.00000000000000 contentType: referenceInformation description: Longitude at the ascending node crossing. Type: double precision. origname: lan fullnamepath: /orbit_info/lan coordinates: orbit_info_crossing_time |
| orbit_info_sc_orient: | Array of 16 bit Integers [orbit_info_sc_orient_time = 0..0] long_name: Spacecraft Orientation units: 1 source: POD/PPD valid_min: 0 valid_max: 2 contentType: referenceInformation description: This parameter tracks the spacecraft orientation between forward, backward and transitional flight modes. ICESat-2 is considered to be flying forward when the weak beams are leading the strong beams; and backward when the strong beams are leading the weak beams. ICESat-2 is considered to be in transition while it is maneuvering between the two orientations. Science quality is potentially degraded while in transition mode. Type: integer*1. flag_meanings: backward forward transition flag_values: 0, 1, 2 origname: sc_orient fullnamepath: /orbit_info/sc_orient coordinates: orbit_info_sc_orient_time |
| orbit_info_rgt: | Array of 16 bit Integers [orbit_info_crossing_time = 0..436] long_name: Reference Ground Track units: 1 source: POD/PPD valid_min: 1 valid_max: 1387 contentType: referenceInformation description: The reference ground track (RGT) is the track on the earth at which a specified unit vector within the observatory is pointed. Under nominal operating conditions, there will be no data collected along the RGT, as the RGT is spanned by GT3 and GT4. During slews or off-pointing, it is possible that ground tracks may intersect the RGT. The ICESat-2 mission has 1387 RGTs. Type: integer*2. origname: rgt fullnamepath: /orbit_info/rgt coordinates: orbit_info_crossing_time |
| global_grnd_detect_img: | Array of Bytes [FakeDim1 = 0..723][FakeDim2 = 0..1026][FakeDim3 = 0..2] CLASS: IMAGE IMAGE_VERSION: 1.2 IMAGE_SUBCLASS: IMAGE_TRUECOLOR INTERLACE_MODE: INTERLACE_PIXEL origname: global_grnd_detect_img fullnamepath: /global_grnd_detect_img |
| spolar_grnd_detect: | Array of 32 bit Reals [spolar_grid_lat = 0..59][spolar_grid_lon = 0..239] _FillValue: 3.402823466e+38 long_name: South Polar Ground Detection Frequency (fraction) units: fraction source: ATM L3B ATBD, Section 3.6, Section 5.0, Table 5. valid_min: 0.000000000 valid_max: 1.000000000 contentType: modelResult description: The south polar ground detection frequency two-dimensional atmospheric gridded parameter. For each south polar grid cell this represents the number of detected surface signal 25 Hz (high-rate profile) observations (surface_sig () > 0.0) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded south polar ground detection values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The calculation results in a fractional value. The ATL09 required detected surface signal (surface_sig ()) is determined from the surface signal count of the number of photons in the detected surface bin in the L3A ATM high-rate profile processing. Grid array organization: spolar_grnd_detect (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the monthly polar_grid_lon_scale = 1.5 degrees and the polar_grid_lat_scale = 0.5 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the monthly gridded array dimension is: spolar_grnd_detect (240,60), type: floating point. Reference: spolar_grnd_detect (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "spolar_grnd_detect_img" in the ATL17 product. The applicable south polar observation counts for this atmosphere gridded parameter are available from: spolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. coordinates: spolar_grid_lon spolar_grid_lat origname: spolar_grnd_detect fullnamepath: /spolar_grnd_detect |
| spolar_lowcloud_frac_img: | Array of Bytes [FakeDim4 = 0..637][FakeDim5 = 0..561][FakeDim3 = 0..2] CLASS: IMAGE IMAGE_VERSION: 1.2 IMAGE_SUBCLASS: IMAGE_TRUECOLOR INTERLACE_MODE: INTERLACE_PIXEL origname: spolar_lowcloud_frac_img fullnamepath: /spolar_lowcloud_frac_img |
| npolar_highcloud_frac_img: | Array of Bytes [FakeDim4 = 0..637][FakeDim5 = 0..561][FakeDim3 = 0..2] CLASS: IMAGE IMAGE_VERSION: 1.2 IMAGE_SUBCLASS: IMAGE_TRUECOLOR INTERLACE_MODE: INTERLACE_PIXEL origname: npolar_highcloud_frac_img fullnamepath: /npolar_highcloud_frac_img |
| npolar_hirate_blowing_snow_freq_img: | Array of Bytes [FakeDim4 = 0..637][FakeDim5 = 0..561][FakeDim3 = 0..2] CLASS: IMAGE IMAGE_VERSION: 1.2 IMAGE_SUBCLASS: IMAGE_TRUECOLOR INTERLACE_MODE: INTERLACE_PIXEL origname: npolar_hirate_blowing_snow_freq_img fullnamepath: /npolar_hirate_blowing_snow_freq_img |
| spolar_hirate_blowing_snow_freq_img: | Array of Bytes [FakeDim4 = 0..637][FakeDim5 = 0..561][FakeDim3 = 0..2] CLASS: IMAGE IMAGE_VERSION: 1.2 IMAGE_SUBCLASS: IMAGE_TRUECOLOR INTERLACE_MODE: INTERLACE_PIXEL origname: spolar_hirate_blowing_snow_freq_img fullnamepath: /spolar_hirate_blowing_snow_freq_img |
| npolar_grnd_detect_img: | Array of Bytes [FakeDim4 = 0..637][FakeDim5 = 0..561][FakeDim3 = 0..2] CLASS: IMAGE IMAGE_VERSION: 1.2 IMAGE_SUBCLASS: IMAGE_TRUECOLOR INTERLACE_MODE: INTERLACE_PIXEL origname: npolar_grnd_detect_img fullnamepath: /npolar_grnd_detect_img |
| npolar_lowcloud_frac: | Array of 32 bit Reals [npolar_grid_lat = 0..59][npolar_grid_lon = 0..239] _FillValue: 3.402823466e+38 long_name: North Polar Low Cloud Fraction (<= 4km) units: fraction source: ATM L3B ATBD, Section 3.3.1, Section 5.0, Table 5. valid_min: 0.000000000 valid_max: 1.000000000 contentType: modelResult description: The north polar low (<= 4km) cloud fraction two-dimensional atmospheric gridded parameter. For each north polar grid cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1 within cloud_flag_atm () layers) that occurs below and up to and including 4 km from the layer top (layer_top (,) <= 4.0 within cloud_flag_atm () layers) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded north polar low cloud fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALD. The ATL09 required number of layers (cloud_flag_atm ()), the layer attribute flag (layer_attr (,)), and the height of the detected layers (layer_top (,)) are determined from the backscatter profile using the DDA layer finder in the L3A ATM high-rate profile processing. Grid array organization: npolar_lowcloud_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the monthly polar_grid_lon_scale = 1.5 degrees and the polar_grid_lat_scale = 0.5 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the monthly gridded array dimension is: npolar_lowcloud_frac (240,60), type: floating point. Reference: npolar_lowcloud_frac (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "npolar_lowcloud_frac_img" in the ATL17 product. The applicable north polar observation counts for this atmosphere gridded parameter are available from: npolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. coordinates: npolar_grid_lon npolar_grid_lat origname: npolar_lowcloud_frac fullnamepath: /npolar_lowcloud_frac |
| global_asr_img: | Array of Bytes [FakeDim1 = 0..723][FakeDim2 = 0..1026][FakeDim3 = 0..2] CLASS: IMAGE IMAGE_VERSION: 1.2 IMAGE_SUBCLASS: IMAGE_TRUECOLOR INTERLACE_MODE: INTERLACE_PIXEL origname: global_asr_img fullnamepath: /global_asr_img |
| npolar_lorate_bsnow_obs_grid: | Array of 32 bit Reals [npolar_grid_lat = 0..59][npolar_grid_lon = 0..239] long_name: north polar low-rate blowing snow frequency observation grid units: 1 source: ATM L3B ATBD, Section 3.9, Table 4., Section 5.0, Table 5. contentType: modelResult description: The north polar low-rate blowing snow observation count two-dimensional gridded parameter. The number of low-rate profile blowing snow observations used in the computation of low-rate blowing snow frequency for the Arctic. For each north polar grid cell this represents the number of valid blowing snow confidence 1 Hz (low-rate profile) observations (bsnow_con () .ne. INVALID), where the low-rate profile blowing snow confidence value exceeds the surface not detected value (bsnow_con () > -3, and is actually implemented as bsnow_con () => -2). Only valid detected blowing snow layer top height 1 Hz (low-rate profile) observations (bsnow_h () .ne. INVALID and bsnow_h () > 0.0) and only valid blowing snow confidence 1 Hz (low-rate profile) observations (bsnow_con () .ne. INVALID), where the low-rate blowing snow confidence value exceeds the surface not detected value (bsnow_con () > -3, and is implemented as bsnow_con () => -2) in each grid cell are used to compute the cell north polar low-rate blowing snow frequency (npolar_lorate_blowing_snow_freq (i,j)). Grid array organization: npolar_lorate_bsnow_obs_grid (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the monthly polar_grid_lon_scale = 1.5 degrees and the polar_grid_lat_scale = 0.5 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the monthly gridded array dimension is: npolar_lorate_bsnow_obs_grid (240,60), type: floating point. Reference: npolar_lorate_bsnow_obs_grid (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. The north polar observation counts are applicable to the atmosphere gridded parameter: npolar_lorate_blowing_snow_freq (i,j). coordinates: npolar_grid_lon npolar_grid_lat origname: npolar_lorate_bsnow_obs_grid fullnamepath: /npolar_lorate_bsnow_obs_grid |
| spolar_lowcloud_frac: | Array of 32 bit Reals [spolar_grid_lat = 0..59][spolar_grid_lon = 0..239] _FillValue: 3.402823466e+38 long_name: South Polar Low Cloud Fraction (<= 4km) units: fraction source: ATM L3B ATBD, Section 3.3.1, Section 5.0, Table 5. valid_min: 0.000000000 valid_max: 1.000000000 contentType: modelResult description: The south polar low (<= 4km) cloud fraction two-dimensional atmospheric gridded parameter. For each south polar grid cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1 within cloud_flag_atm () layers) that occurs below and up to and including 4 km from the layer top (layer_top(,) <= 4.0 within cloud_flag_atm () layers) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded south polar low cloud fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The ATL09 required number of layers (cloud_flag_atm ()), the layer attribute flag (layer_attr (,)), and the height of the detected layers (layer_top (,)) are determined from the backscatter profile using the DDA layer finder in the L3A ATM high-rate profile processing. Grid array organization: spolar_lowcloud_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the monthly polar_grid_lon_scale = 1.5 degrees and the polar_grid_lat_scale = 0.5 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the monthly gridded array dimension is: spolar_lowcloud_frac (240,60), type: floating point. Reference: spolar_lowcloud_frac (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "spolar_lowcloud_frac_img" in the ATL17 product. The applicable south polar observation counts for this atmosphere gridded parameter are available from: spolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. coordinates: spolar_grid_lon spolar_grid_lat origname: spolar_lowcloud_frac fullnamepath: /spolar_lowcloud_frac |
| global_column_od: | Array of 32 bit Reals [global_grid_lat = 0..179][global_grid_lon = 0..359] _FillValue: 3.402823466e+38 long_name: Global (Over Water) Total Column Optical Depth (0-1.5) units: 1 source: ATM L3B ATBD, Section 3.2, Section 5.0, Table 5. valid_min: 0.000000000 valid_max: 1.500000000 contentType: modelResult description: The global (over water) average total column optical depth two-dimensional atmospheric gridded parameter. For each global grid cell this represents the ratio of the summation of the valid over-water (column_od_asr_qf () = 4 for water) column optical depth 25 Hz (high-rate profile) observations (column_od_asr () .ne. INVALID) to the number of valid over-water column optical depth 25 Hz (high-rate profile) observations (tcod_obs_grid (i,j)) in that cell. The average over-water global total column optical depth values are produced when the number of valid over-water column optical depth 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (tcod_obs_grid (i,j) => obs_minimum); otherwise set to INVALID. The ATL09 required total column optical depth (column_od_asr ()) is estimated from the apparent surface reflectance (ASR) and the assumed actual surface reflectance. The required total column optical depth from ASR quality flag (column_od_asr_qf ()) supplies the reflecting surface type for over-water surface determination. Both ATL09 parameters are supplied from the L3A ATM high-rate profile processing. The 0.0 to 1.5 value range constraint is applied to the global image, and is not applied to the gridded parameter values. Grid array organization: global_column_od (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given monthly global_grid_lon_scale = 1.0 degrees and global_grid_lat_scale = 1.0 degrees, gridded array dimension: global_column_od (360,180), type: floating point. Reference: global_column_od (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the global projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "global_column_od_img" in the ATL17 product. The applicable global observation counts for this atmosphere gridded parameter are available from: tcod_obs_grid (i,j). Expected value range: minimum: 0.0, maximum: 1.5. Maximum value may exceed 1.5 (e.g., 2.94870949). Image will be limited to the range of 0.0 to 1.5. coordinates: global_grid_lon global_grid_lat origname: global_column_od fullnamepath: /global_column_od |
| data_qa_flag: | Array of 16 bit Integers [FakeDim0 = 0..0] long_name: data quality flag units: auxiliaryInformation source: L3B ATM ATBD, Section 5.0, Table 5. contentType: qualityInformation description: The data quality flag scalar parameter. This is a TBD flag that may be used to indicate data quality. Type: integer*1. origname: data_qa_flag fullnamepath: /data_qa_flag |
| npolar_highcloud_frac: | Array of 32 bit Reals [npolar_grid_lat = 0..59][npolar_grid_lon = 0..239] _FillValue: 3.402823466e+38 long_name: North Polar High Cloud Fraction (> 8km) units: fraction source: ATM L3B ATBD, Section 3.3.1, Section 5.0, Table 5. valid_min: 0.000000000 valid_max: 1.000000000 contentType: modelResult description: The north polar high (> 8km) cloud fraction two-dimensional atmospheric gridded parameter. For each north polar grid cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1 within cloud_flag_atm () layers) that occurs above 8 km from the layer top (layer_top(,) > 8.0 within cloud_flag_atm () layers) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded north polar high cloud fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The ATL09 required number of layers (cloud_flag_atm ()), the layer attribute flag (layer_attr (,)), and the height of the detected layers (layer_top (,)) are determined from the backscatter profile using the DDA layer finder in the L3A ATM high-rate profile processing. Grid array organization: npolar_highcloud_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the monthly polar_grid_lon_scale = 1.5 degrees and the polar_grid_lat_scale = 0.5 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the monthly gridded array dimension is: npolar_highcloud_frac (240,60), type: floating point. Reference: npolar_highcloud_frac (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "npolar_highcloud_frac_img" in the ATL17 product. The applicable north polar observation counts for this atmosphere gridded parameter are available from: npolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. coordinates: npolar_grid_lon npolar_grid_lat origname: npolar_highcloud_frac fullnamepath: /npolar_highcloud_frac |
| spolar_grnd_detect_img: | Array of Bytes [FakeDim4 = 0..637][FakeDim5 = 0..561][FakeDim3 = 0..2] CLASS: IMAGE IMAGE_VERSION: 1.2 IMAGE_SUBCLASS: IMAGE_TRUECOLOR INTERLACE_MODE: INTERLACE_PIXEL origname: spolar_grnd_detect_img fullnamepath: /spolar_grnd_detect_img |
| tcod_obs_grid: | Array of 32 bit Reals [global_grid_lat = 0..179][global_grid_lon = 0..359] long_name: global total column optical depth (over water) observation grid units: 1 source: ATM L3B ATBD, Section 3.9, Table 4., Section 5.0, Table 5. contentType: modelResult description: The global total column optical depth (over water) observation count two-dimensional gridded parameter. The number of observations used to compute the average global total column optical depth over water. Only valid surface return over-water (column_od_asr_qf () = 4 for water) column optical depth (column_od_asr () .ne. INVALID and column_od_asr () > 0.0) 25 Hz (high-rate profile) observations in each grid cell are used to compute the cell average over-water total column optical depth (global_column_od (i,j)). Grid array organization: tcod_obs_grid (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the monthly global_grid_lon_scale = 1.0 degrees and the global_grid_lat_scale = 1.0 degrees, the monthly global gridded array dimension is: tcod_obs_grid (360,180), type: floating point. Reference: tcod_obs_grid (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the global projection array. The global observation counts are applicable to the atmosphere gridded parameter: global_column_od (i,j). coordinates: global_grid_lon global_grid_lat origname: tcod_obs_grid fullnamepath: /tcod_obs_grid |
| spolar_totalcloud_frac: | Array of 32 bit Reals [spolar_grid_lat = 0..59][spolar_grid_lon = 0..239] _FillValue: 3.402823466e+38 long_name: South Polar Total Cloud Fraction units: fraction source: ATM L3B ATBD, Section 3.3.1, Section 5.0, Table 5. valid_min: 0.000000000 valid_max: 1.000000000 contentType: modelResult description: The south polar total cloud fraction two-dimensional atmospheric gridded parameter. For each south polar grid cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1 within cloud_flag_atm () layers) to the number of all 25 Hz (high-rate profile) observations (spolar_cloud_obs_grid (i,j)) in the cell. The gridded south polar total cloud fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (spolar_cloud_obs_grid (i,j) => obs_minimum); otherwise set to INVALID. The ATL09 required number of layers (cloud_flag_atm ()) and the layer attribute flag (layer_attr (,)) are determined from the backscatter profile using the DDA layer finder in the L3A ATM high-rate profile processing. Grid array organization: spolar_totalcloud_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the monthly polar_grid_lon_scale = 1.5 degrees and the polar_grid_lat_scale = 0.5 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the monthly gridded array dimension is: spolar_totalcloud_frac (240,60), type: floating point. Reference: spolar_totalcloud_frac (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "spolar_totalcloud_frac_img" in the ATL17 product. The applicable south polar observation counts for this atmosphere gridded parameter are available from: spolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. coordinates: spolar_grid_lon spolar_grid_lat origname: spolar_totalcloud_frac fullnamepath: /spolar_totalcloud_frac |
| npolar_transcloud_frac: | Array of 32 bit Reals [npolar_grid_lat = 0..59][npolar_grid_lon = 0..239] _FillValue: 3.402823466e+38 long_name: North Polar Transmissive Cloud Fraction units: fraction source: ATM L3B ATBD, Section 3.3.2, Section 5.0, Table 5. valid_min: 0.000000000 valid_max: 1.000000000 contentType: modelResult description: The north polar transmissive cloud fraction two-dimensional atmospheric gridded parameter. For each north polar cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1 within cloud_flag_atm () layers) with surface signal detection (surface_sig () > 0.0) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded north polar transmissive cloud fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The fraction of transmissive clouds covering the entire grid cell. Transmissive clouds are clouds that permit or allow transmission of downward radiation through the cloud. The ATL09 required number of layers (cloud_flag_atm ()) and the layer attribute flag (layer_attr (,)) are determined from the backscatter profile using the DDA layer finder, and the required detected surface signal (surface_sig ()) is determined from the surface signal count of the number of photons in the detected surface bin, all in the L3A ATM high-rate profile processing. Grid array organization: npolar_transcloud_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the monthly polar_grid_lon_scale = 1.5 degrees and the polar_grid_lat_scale = 0.5 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the monthly gridded array dimension is: npolar_transcloud_frac (240,60), type: floating point. Reference: npolar_transcloud_frac (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "npolar_transcloud_frac_img" in the ATL17 product. The applicable north polar observation counts for this atmosphere gridded parameter are available from: npolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. coordinates: npolar_grid_lon npolar_grid_lat origname: npolar_transcloud_frac fullnamepath: /npolar_transcloud_frac |
| npolar_cloud_obs_grid: | Array of 32 bit Reals [npolar_grid_lat = 0..59][npolar_grid_lon = 0..239] long_name: north polar cloud observation grid units: 1 source: ATM L3B ATBD, Section 3.9, Table 4., Section 5.0, Table 5. contentType: modelResult description: The north polar total cloud fraction observation count two-dimensional gridded parameter. The number of observations used to compute the north polar total cloud fraction. This number represents all 25 Hz (high-rate profile) observations in each cell. Only 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1) in each grid cell are used to compute the cell north polar total cloud fraction (npolar_totlcloud_frac (i,j)). Grid array organization: npolar_cloud_obs_grid (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the monthly polar_grid_lon_scale = 1.5 degrees and the polar_grid_lat_scale = 0.5 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the monthly gridded array dimension is: npolar_cloud_obs_grid (240,60), type: floating point. Reference: npolar_cloud_obs_grid (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. The north polar observation counts are applicable to these atmosphere gridded parameters: npolar_lowcloud_frac (i,j), npolar_midcloud_frac (i,j), npolar_highcloud_frac (i,j), npolar_totalcloud_frac (i,j), npolar_transcloud_frac (i,j), npolar_opaquecloud_frac (i,j), and npolar_grnd_detect (i,j). coordinates: npolar_grid_lon npolar_grid_lat origname: npolar_cloud_obs_grid fullnamepath: /npolar_cloud_obs_grid |
| npolar_hirate_bsnow_obs_grid: | Array of 32 bit Reals [npolar_grid_lat = 0..59][npolar_grid_lon = 0..239] long_name: north polar high-rate blowing snow frequency observation grid units: 1 source: ATM L3B ATBD, Section 3.9, Table 4., Section 5.0, Table 5. contentType: modelResult description: The north polar high-rate blowing snow observation count two-dimensional gridded parameter. The number of high-rate profile blowing snow observations used in the computation of high-rate blowing snow frequency for the Arctic. For each north polar grid cell this represents the number of valid blowing snow confidence 25 Hz (high-rate profile) observations (bsnow_con () .ne. INVALID), where the high-rate profile blowing snow confidence value exceeds the surface not detected value (bsnow_con () > -3, and is actually implemented as bsnow_con () => -2). Only valid detected blowing snow layer top height 25 Hz (high-rate profile) observations (bsnow_h () .ne. INVALID and bsnow_h () > 0.0) and only valid blowing snow confidence 25 Hz (high-rate profile) observations (bsnow_con () .ne. INVALID), where the high-rate blowing snow confidence value exceeds the surface not detected value (bsnow_con () > -3, and is implemented as bsnow_con () => -2) in each grid cell are used to compute the cell north polar high-rate blowing snow frequency (npolar_hirate_blowing_snow_freq (i,j)). Grid array organization: npolar_hirate_bsnow_obs_grid (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the monthly polar_grid_lon_scale = 1.5 degrees and the polar_grid_lat_scale = 0.5 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the monthly gridded array dimension is: npolar_hirate_bsnow_obs_grid (240,60), type: floating point. Reference: npolar_hirate_bsnow_obs_grid (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. The north polar observation counts are applicable to the atmosphere gridded parameter: npolar_hirate_blowing_snow_freq (i,j). coordinates: npolar_grid_lon npolar_grid_lat origname: npolar_hirate_bsnow_obs_grid fullnamepath: /npolar_hirate_bsnow_obs_grid |
| spolar_asr_obs_grid: | Array of 32 bit Reals [spolar_grid_lat = 0..59][spolar_grid_lon = 0..239] long_name: south polar apparent surface reflectance observation grid units: 1 source: ATM L3B ATBD, Section 3.9, Table 4., Section 5.0, Table 5. contentType: modelResult description: The south polar apparent surface reflectance (ASR) observation count two-dimensional gridded parameter. The number of observations used to compute the average south polar apparent surface reflectance (ASR). Only surface signal detected ASR 25 Hz (high-rate profile) observations (apparent_surf_reflec () > 0.0) in each grid cell are used to compute the cell south polar ASR (spolar_asr (i,j)). Grid array organization: spolar_asr_obs_grid (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the monthly polar_grid_lon_scale = 1.5 degrees and the polar_grid_lat_scale = 0.5 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the monthly gridded array dimension is: spolar_asr_obs_grid (240,60), type: floating point. Reference: spolar_asr_obs_grid (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. The south polar observation counts are applicable to to the atmosphere gridded parameter: spolar_asr (i,j). coordinates: spolar_grid_lon npolar_grid_lat origname: spolar_asr_obs_grid fullnamepath: /spolar_asr_obs_grid |
| global_asr_obs_grid: | Array of 32 bit Reals [global_grid_lat = 0..179][global_grid_lon = 0..359] long_name: global apparent surface reflectance observation grid units: 1 source: ATM L3B ATBD, Section 3.9, Table 4., Section 5.0, Table 5. contentType: modelResult description: The global apparent surface reflectance (ASR) observation count two-dimensional gridded parameter. The number of observations used to compute the average global apparent surface reflectance (ASR). Only surface signal detected ASR 25 Hz (high-rate profile) observations (apparent_surf_reflec () > 0.0) in each grid cell are used to compute the cell global ASR (global_asr (i,j)). Grid array organization: global_asr_obs_grid (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the monthly global_grid_lon_scale = 1.0 degrees and the global_grid_lat_scale = 1.0 degrees, the monthly global gridded array dimension is: global_asr_obs_grid (360,180), type: floating point . Reference: global_asr_obs_grid (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the global projection array. The global observation counts are applicable to the atmosphere gridded parameter: global_asr (i,j). coordinates: global_grid_lon global_grid_lat origname: global_asr_obs_grid fullnamepath: /global_asr_obs_grid |
| spolar_opaquecloud_frac_img: | Array of Bytes [FakeDim4 = 0..637][FakeDim5 = 0..561][FakeDim3 = 0..2] CLASS: IMAGE IMAGE_VERSION: 1.2 IMAGE_SUBCLASS: IMAGE_TRUECOLOR INTERLACE_MODE: INTERLACE_PIXEL origname: spolar_opaquecloud_frac_img fullnamepath: /spolar_opaquecloud_frac_img |
| npolar_lorate_blowing_snow_freq_img: | Array of Bytes [FakeDim4 = 0..637][FakeDim5 = 0..561][FakeDim3 = 0..2] CLASS: IMAGE IMAGE_VERSION: 1.2 IMAGE_SUBCLASS: IMAGE_TRUECOLOR INTERLACE_MODE: INTERLACE_PIXEL origname: npolar_lorate_blowing_snow_freq_img fullnamepath: /npolar_lorate_blowing_snow_freq_img |
| spolar_lorate_blowing_snow_freq_img: | Array of Bytes [FakeDim4 = 0..637][FakeDim5 = 0..561][FakeDim3 = 0..2] CLASS: IMAGE IMAGE_VERSION: 1.2 IMAGE_SUBCLASS: IMAGE_TRUECOLOR INTERLACE_MODE: INTERLACE_PIXEL origname: spolar_lorate_blowing_snow_freq_img fullnamepath: /spolar_lorate_blowing_snow_freq_img |
| global_aerosol_frac: | Array of 32 bit Reals [global_grid_lat = 0..179][global_grid_lon = 0..359] _FillValue: 3.402823466e+38 long_name: Global Aerosol Fraction units: fraction source: ATM L3B ATBD, Section 3.1.1, Section 5.0, Table 5. valid_min: 0.000000000 valid_max: 1.000000000 contentType: modelResult description: The global aerosol fraction two-dimensional atmospheric gridded parameter. For each global grid cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one aerosol layer (layer_attr (,) = 2 within cloud_flag_atm () layers) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded global aerosol fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The ATL09 required number of layers (cloud_flag_atm ()) and the layer attribute flag (layer_attr (,)) are determined from the backscatter profile using the DDA layer finder in the L3A ATM high-rate profile processing. Grid array organization: global_aerosol_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the monthly global_grid_lon_scale = 1.0 degrees and the global_grid_lat_scale = 1.0 degrees, the global gridded array dimension is: global_aerosol_frac (360,180), type: floating point. Reference: global_aerosol_frac (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the global projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "global_aerosol_frac_img" in the ATL17 product. The applicable global observation counts for this atmosphere gridded parameter are available from: global_cloud_aerosol_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. coordinates: global_grid_lon global_grid_lat origname: global_aerosol_frac fullnamepath: /global_aerosol_frac |
| npolar_asr_obs_grid: | Array of 32 bit Reals [npolar_grid_lat = 0..59][npolar_grid_lon = 0..239] long_name: north polar apparent surface reflectance observation grid units: 1 source: ATM L3B ATBD, Section 3.9, Table 4., Section 5.0, Table 5. contentType: modelResult description: The north polar apparent surface reflectance (ASR) observation count two-dimensional gridded parameter. The number of observations used to compute the average north polar apparent surface reflectance (ASR). Only surface signal detected ASR 25 Hz (high-rate profile) observations (apparent_surf_reflec () > 0.0) in each grid cell are used to compute the cell north polar ASR (npolar_asr (i,j)). Grid array organization: npolar_asr_obs_grid (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the monthly polar_grid_lon_scale = 1.5 degrees and the polar_grid_lat_scale = 0.5 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the monthly gridded array dimension is: npolar_asr_obs_grid (240,60), type: floating point. Reference: npolar_asr_obs_grid (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. The north polar observation counts are applicable to to the atmosphere gridded parameter: npolar_asr (i,j). coordinates: npolar_grid_lon npolar_grid_lat origname: npolar_asr_obs_grid fullnamepath: /npolar_asr_obs_grid |
| npolar_midcloud_frac: | Array of 32 bit Reals [npolar_grid_lat = 0..59][npolar_grid_lon = 0..239] _FillValue: 3.402823466e+38 long_name: North Polar Mid Cloud Fraction (> 4km and <= 8km) units: fraction source: ATM L3B ATBD, Section 3.3.1, Section 5.0, Table 5. valid_min: 0.000000000 valid_max: 1.000000000 contentType: modelResult description: The north polar middle (> 4km and <= 8km) cloud fraction two-dimensional atmospheric gridded parameter. For each north polar grid cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1 within cloud_flag_atm () layers) that occurs above 4 km and up to and including 8 km from the layer top (layer_top (,) > 4.0 and <= 8.0 within cloud_flag_atm () layers) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded north polar middle cloud fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The ATL09 required number of layers (cloud_flag_atm ()), the layer attribute flag (layer_attr (,)), and the height of the detected layers (layer_top (,)) are determined from the backscatter profile using the DDA layer finder in the L3A ATM high-rate profile processing. Grid array organization: npolar_midcloud_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the monthly polar_grid_lon_scale = 1.5 degrees and the polar_grid_lat_scale = 0.5 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the monthly gridded array dimension is: npolar_midcloud_frac (240,60), type: floating point. Reference: npolar_midcloud_frac (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "npolar_midcloud_frac_img" in the ATL17 product. The applicable north polar observation counts for this atmosphere gridded parameter are available from: npolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. coordinates: npolar_grid_lon npolar_grid_lat origname: npolar_midcloud_frac fullnamepath: /npolar_midcloud_frac |
| global_grnd_detect: | Array of 32 bit Reals [global_grid_lat = 0..179][global_grid_lon = 0..359] _FillValue: 3.402823466e+38 long_name: Global Ground Detection Frequency (fraction) units: fraction source: ATM L3B ATBD, Section 3.6, Section 5.0, Table 5. valid_min: 0.000000000 valid_max: 1.000000000 contentType: modelResult description: The global ground detection frequency two-dimensional atmospheric gridded parameter. For each global grid cell this represents the number of detected surface signal 25 Hz (high-rate profile) observations (surface_sig () > 0.0) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded global ground detection values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The calculation results in a fractional value. The ATL09 required detected surface signal (surface_sig ()) is determined from the surface signal count of the number of photons in the detected surface bin in the L3A ATM high-rate profile processing. Grid array organization: global_grnd_detect (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given monthly global_grid_lon_scale = 1.0 degrees and global_grid_lat_scale = 1.0 degrees, gridded array dimension: global_grnd_detect (360,180), type: floating point. Reference: global_grnd_detect (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the global projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "global_ground_detect_img" in the ATL17 product. The applicable global observation counts for this atmosphere gridded parameter are available from: global_cloud_aerosol_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. coordinates: global_grid_lon global_grid_lat origname: global_grnd_detect fullnamepath: /global_grnd_detect |
| spolar_highcloud_frac_img: | Array of Bytes [FakeDim4 = 0..637][FakeDim5 = 0..561][FakeDim3 = 0..2] CLASS: IMAGE IMAGE_VERSION: 1.2 IMAGE_SUBCLASS: IMAGE_TRUECOLOR INTERLACE_MODE: INTERLACE_PIXEL origname: spolar_highcloud_frac_img fullnamepath: /spolar_highcloud_frac_img |
| quality_assessment_qa_granule_fail_reason: | Array of 32 bit Integers [FakeDim0 = 0..0] long_name: Granule Failure Reason units: 1 source: Operations valid_min: 0 valid_max: 5 contentType: qualityInformation description: Flag indicating granule failure reason. 0=no failure; 1=processing error; 2=Insufficient output data was generated; 3=TBD Failure; 4=TBD Failure; 5=other failure. Type: integer. flag_meanings: no_failure PROCESS_ERROR INSUFFICIENT_OUTPUT failure_3 failure_4 OTHER_FAILURE flag_values: 0, 1, 2, 3, 4, 5 origname: qa_granule_fail_reason fullnamepath: /quality_assessment/qa_granule_fail_reason |
| quality_assessment_qa_granule_pass_fail: | Array of 32 bit Integers [FakeDim0 = 0..0] long_name: Granule Pass Flag units: 1 source: Operations valid_min: 0 valid_max: 1 contentType: qualityInformation description: Flag indicating granule quality. 0=granule passes automatic QA. 1=granule fails automatic QA. Type: integer. flag_meanings: PASS FAIL flag_values: 0, 1 origname: qa_granule_pass_fail fullnamepath: /quality_assessment/qa_granule_pass_fail |
| quality_assessment_atmosphere_global_aerosol_frac_mean: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: global aerosol fraction mean value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The global aerosol fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: global_aerosol_frac_mean fullnamepath: /quality_assessment/atmosphere/global_aerosol_frac_mean |
| quality_assessment_atmosphere_spolar_totalcloud_frac_mean: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: south polar total cloud fraction mean value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The south polar total cloud fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: spolar_totalcloud_frac_mean fullnamepath: /quality_assessment/atmosphere/spolar_totalcloud_frac_mean |
| quality_assessment_atmosphere_global_asr_mean: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: global apparent surface reflectance mean value units: 1 source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 3.000000000 contentType: qualityInformation description: The global apparent surface reflectance gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.57377338). origname: global_asr_mean fullnamepath: /quality_assessment/atmosphere/global_asr_mean |
| quality_assessment_atmosphere_global_aerosol_frac_min: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: global aerosol fraction minimum value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The global aerosol fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: global_aerosol_frac_min fullnamepath: /quality_assessment/atmosphere/global_aerosol_frac_min |
| quality_assessment_atmosphere_npolar_asr_max: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: north polar apparent surface reflectance maximum value units: 1 source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 3.000000000 contentType: qualityInformation description: The north polar apparent surface reflectance gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.19374275). origname: npolar_asr_max fullnamepath: /quality_assessment/atmosphere/npolar_asr_max |
| quality_assessment_atmosphere_spolar_totalcloud_frac_sdev: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: south polar total cloud fraction standard deviation value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The south polar total cloud fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: spolar_totalcloud_frac_sdev fullnamepath: /quality_assessment/atmosphere/spolar_totalcloud_frac_sdev |
| quality_assessment_atmosphere_npolar_highcloud_frac_sdev: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: north polar high (> 8km) cloud fraction standard deviation value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The north polar high (> 8km) cloud fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: npolar_highcloud_frac_sdev fullnamepath: /quality_assessment/atmosphere/npolar_highcloud_frac_sdev |
| quality_assessment_atmosphere_npolar_midcloud_frac_max: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: north polar middle (> 4km and <= 8km) cloud fraction maximum value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The north polar middle (> 4km and <= 8km) cloud fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: npolar_midcloud_frac_max fullnamepath: /quality_assessment/atmosphere/npolar_midcloud_frac_max |
| quality_assessment_atmosphere_npolar_lorate_blowing_snow_freq_mean: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: north polar low-rate blowing snow frequency mean value units: percent source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 100.0000000 contentType: qualityInformation description: The north polar low-rate blowing snow frequency gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. origname: npolar_lorate_blowing_snow_freq_mean fullnamepath: /quality_assessment/atmosphere/npolar_lorate_blowing_snow_freq_mean |
| quality_assessment_atmosphere_spolar_lowcloud_frac_mean: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: south polar low (<= 4km) cloud fraction mean value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The south polar low (<= 4km) cloud fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: spolar_lowcloud_frac_mean fullnamepath: /quality_assessment/atmosphere/spolar_lowcloud_frac_mean |
| quality_assessment_atmosphere_spolar_totalcloud_frac_min: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: south polar total cloud fraction minimum value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The south polar total cloud fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: spolar_totalcloud_frac_min fullnamepath: /quality_assessment/atmosphere/spolar_totalcloud_frac_min |
| quality_assessment_atmosphere_global_asr_sdev: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: global apparent surface reflectance standard deviation value units: 1 source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 3.000000000 contentType: qualityInformation description: The global apparent surface reflectance gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.57377338). origname: global_asr_sdev fullnamepath: /quality_assessment/atmosphere/global_asr_sdev |
| quality_assessment_atmosphere_global_grnd_detect_mean: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: global ground detection frequency mean value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The global ground detection frequency gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: global_grnd_detect_mean fullnamepath: /quality_assessment/atmosphere/global_grnd_detect_mean |
| quality_assessment_atmosphere_spolar_transcloud_frac_sdev: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: south polar transmissive cloud fraction standard deviation value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The south polar transmissive cloud fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: spolar_transcloud_frac_sdev fullnamepath: /quality_assessment/atmosphere/spolar_transcloud_frac_sdev |
| quality_assessment_atmosphere_npolar_highcloud_frac_max: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: north polar high (> 8km) cloud fraction maximum value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The north polar high (> 8km) cloud fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: npolar_highcloud_frac_max fullnamepath: /quality_assessment/atmosphere/npolar_highcloud_frac_max |
| quality_assessment_atmosphere_spolar_asr_min: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: south polar apparent surface reflectance minimum value units: 1 source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 3.000000000 contentType: qualityInformation description: The south polar apparent surface reflectance gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.57377338). origname: spolar_asr_min fullnamepath: /quality_assessment/atmosphere/spolar_asr_min |
| quality_assessment_atmosphere_npolar_lorate_blowing_snow_freq_sdev: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: north polar low-rate blowing snow frequency standard deviation value units: percent source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 100.0000000 contentType: qualityInformation description: The north polar low-rate blowing snow frequency gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. origname: npolar_lorate_blowing_snow_freq_sdev fullnamepath: /quality_assessment/atmosphere/npolar_lorate_blowing_snow_freq_sdev |
| quality_assessment_atmosphere_npolar_grnd_detect_min: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: north polar ground detection frequency minimum value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The north polar ground detection frequency gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: npolar_grnd_detect_min fullnamepath: /quality_assessment/atmosphere/npolar_grnd_detect_min |
| quality_assessment_atmosphere_spolar_opaquecloud_frac_min: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: south polar opaque cloud fraction minimum value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The south polar opaque cloud fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: spolar_opaquecloud_frac_min fullnamepath: /quality_assessment/atmosphere/spolar_opaquecloud_frac_min |
| quality_assessment_atmosphere_spolar_highcloud_frac_max: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: south polar high (> 8km) cloud fraction maximum value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The south polar high (> 8km) cloud fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: spolar_highcloud_frac_max fullnamepath: /quality_assessment/atmosphere/spolar_highcloud_frac_max |
| quality_assessment_atmosphere_spolar_grnd_detect_mean: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: south polar ground detection frequency mean value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The south polar ground detection frequency gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: spolar_grnd_detect_mean fullnamepath: /quality_assessment/atmosphere/spolar_grnd_detect_mean |
| quality_assessment_atmosphere_spolar_opaquecloud_frac_sdev: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: south polar opaque cloud fraction standard deviation value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The south polar opaque cloud fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: spolar_opaquecloud_frac_sdev fullnamepath: /quality_assessment/atmosphere/spolar_opaquecloud_frac_sdev |
| quality_assessment_atmosphere_spolar_transcloud_frac_max: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: south polar transmissive cloud fraction maximum value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The south polar transmissive cloud fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: spolar_transcloud_frac_max fullnamepath: /quality_assessment/atmosphere/spolar_transcloud_frac_max |
| quality_assessment_atmosphere_spolar_lowcloud_frac_min: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: south polar low (<= 4km) cloud fraction minimum value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The south polar low (<= 4km) cloud fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: spolar_lowcloud_frac_min fullnamepath: /quality_assessment/atmosphere/spolar_lowcloud_frac_min |
| quality_assessment_atmosphere_spolar_midcloud_frac_sdev: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: south polar middle (> 4km and <= 8km) cloud fraction standard deviation value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The south polar middle (> 4km and <= 8km) cloud fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: spolar_midcloud_frac_sdev fullnamepath: /quality_assessment/atmosphere/spolar_midcloud_frac_sdev |
| quality_assessment_atmosphere_spolar_midcloud_frac_mean: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: south polar middle (> 4km and <= 8km) cloud fraction mean value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The south polar middle (> 4km and <= 8km) cloud fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: spolar_midcloud_frac_mean fullnamepath: /quality_assessment/atmosphere/spolar_midcloud_frac_mean |
| quality_assessment_atmosphere_spolar_midcloud_frac_min: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: south polar lmiddle (> 4km and <= 8km) cloud fraction minimum value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The south polar middle (> 4km and <= 8km) cloud fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: spolar_midcloud_frac_min fullnamepath: /quality_assessment/atmosphere/spolar_midcloud_frac_min |
| quality_assessment_atmosphere_npolar_totalcloud_frac_mean: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: north polar total cloud fraction mean value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The north polar total cloud fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: npolar_totalcloud_frac_mean fullnamepath: /quality_assessment/atmosphere/npolar_totalcloud_frac_mean |
| quality_assessment_atmosphere_npolar_lorate_blowing_snow_freq_max: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: north polar low-rate blowing snow frequency maximum value units: percent source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 100.0000000 contentType: qualityInformation description: The north polar low-rate blowing snow frequency gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. origname: npolar_lorate_blowing_snow_freq_max fullnamepath: /quality_assessment/atmosphere/npolar_lorate_blowing_snow_freq_max |
| quality_assessment_atmosphere_npolar_totalcloud_frac_max: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: north polar total cloud fraction maximum value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The north polar total cloud fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: npolar_totalcloud_frac_max fullnamepath: /quality_assessment/atmosphere/npolar_totalcloud_frac_max |
| quality_assessment_atmosphere_npolar_hirate_blowing_snow_freq_mean: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: north polar high-rate blowing snow frequency mean value source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 100.0000000 contentType: qualityInformation description: The north polar high-rate blowing snow frequency gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. units: percent origname: npolar_hirate_blowing_snow_freq_mean fullnamepath: /quality_assessment/atmosphere/npolar_hirate_blowing_snow_freq_mean |
| quality_assessment_atmosphere_global_aerosol_frac_sdev: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: global aerosol fraction standard deviation value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The global aerosol fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: global_aerosol_frac_sdev fullnamepath: /quality_assessment/atmosphere/global_aerosol_frac_sdev |
| quality_assessment_atmosphere_spolar_lowcloud_frac_sdev: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: south polar low (<= 4km) cloud fraction standard deviation value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The south polar low (<= 4km) cloud fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: spolar_lowcloud_frac_sdev fullnamepath: /quality_assessment/atmosphere/spolar_lowcloud_frac_sdev |
| quality_assessment_atmosphere_spolar_opaquecloud_frac_mean: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: south polar opaque cloud fraction mean value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The south polar opaque cloud fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: spolar_opaquecloud_frac_mean fullnamepath: /quality_assessment/atmosphere/spolar_opaquecloud_frac_mean |
| quality_assessment_atmosphere_spolar_highcloud_frac_mean: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: south polar high (> 8km) cloud fraction mean value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The south polar high (> 8km) cloud fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: spolar_highcloud_frac_mean fullnamepath: /quality_assessment/atmosphere/spolar_highcloud_frac_mean |
| quality_assessment_atmosphere_npolar_opaquecloud_frac_sdev: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: north polar opaque cloud fraction standard deviation value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The north polar opaque cloud fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: npolar_opaquecloud_frac_sdev fullnamepath: /quality_assessment/atmosphere/npolar_opaquecloud_frac_sdev |
| quality_assessment_atmosphere_spolar_lorate_blowing_snow_freq_sdev: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: south polar low-rate blowing snow frequency standard deviation value units: percent source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 100.0000000 contentType: qualityInformation description: The south polar low-rate blowing snow frequency gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. origname: spolar_lorate_blowing_snow_freq_sdev fullnamepath: /quality_assessment/atmosphere/spolar_lorate_blowing_snow_freq_sdev |
| quality_assessment_atmosphere_spolar_highcloud_frac_sdev: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: south polar high (> 8km) cloud fraction standard deviation value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The south polar high (> 8km) cloud fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: spolar_highcloud_frac_sdev fullnamepath: /quality_assessment/atmosphere/spolar_highcloud_frac_sdev |
| quality_assessment_atmosphere_spolar_opaquecloud_frac_max: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: south polar opaque cloud fraction maximum value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The south polar opaque cloud fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: spolar_opaquecloud_frac_max fullnamepath: /quality_assessment/atmosphere/spolar_opaquecloud_frac_max |
| quality_assessment_atmosphere_spolar_midcloud_frac_max: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: south polar middle (> 4km and <= 8km) cloud fraction maximum value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The south polar middle (> 4km and <= 8km) cloud fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: spolar_midcloud_frac_max fullnamepath: /quality_assessment/atmosphere/spolar_midcloud_frac_max |
| quality_assessment_atmosphere_npolar_transcloud_frac_max: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: north polar transmissive cloud fraction maximum value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The north polar transmissive cloud fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: npolar_transcloud_frac_max fullnamepath: /quality_assessment/atmosphere/npolar_transcloud_frac_max |
| quality_assessment_atmosphere_global_asr_min: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: global apparent surface reflectance minimum value units: 1 source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 3.000000000 contentType: qualityInformation description: The global apparent surface reflectance gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.57377338). origname: global_asr_min fullnamepath: /quality_assessment/atmosphere/global_asr_min |
| quality_assessment_atmosphere_npolar_asr_mean: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: north polar apparent surface reflectance mean value units: 1 source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 3.000000000 contentType: qualityInformation description: The north polar apparent surface reflectance gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g.,1.19374275). origname: npolar_asr_mean fullnamepath: /quality_assessment/atmosphere/npolar_asr_mean |
| quality_assessment_atmosphere_spolar_lorate_blowing_snow_freq_max: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: south polar low-rate blowing snow frequency maximum value units: percent source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 100.0000000 contentType: qualityInformation description: The south polar low-rate blowing snow frequency gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. origname: spolar_lorate_blowing_snow_freq_max fullnamepath: /quality_assessment/atmosphere/spolar_lorate_blowing_snow_freq_max |
| quality_assessment_atmosphere_npolar_highcloud_frac_min: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: north polar high (> 8km) cloud fraction minimum value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The north polar high (> 8km) cloud fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: npolar_highcloud_frac_min fullnamepath: /quality_assessment/atmosphere/npolar_highcloud_frac_min |
| quality_assessment_atmosphere_npolar_hirate_blowing_snow_freq_max: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: north polar high-rate blowing snow frequency maximum value units: percent source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 100.0000000 contentType: qualityInformation description: The north polar high-rate blowing snow frequency gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. origname: npolar_hirate_blowing_snow_freq_max fullnamepath: /quality_assessment/atmosphere/npolar_hirate_blowing_snow_freq_max |
| quality_assessment_atmosphere_global_grnd_detect_min: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: global ground detection frequency minimum value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The global ground detection frequency gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: global_grnd_detect_min fullnamepath: /quality_assessment/atmosphere/global_grnd_detect_min |
| quality_assessment_atmosphere_spolar_asr_sdev: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: south polar apparent surface reflectance standard deviation value units: 1 source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 3.000000000 contentType: qualityInformation description: The south polar apparent surface reflectance gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.57377338). origname: spolar_asr_sdev fullnamepath: /quality_assessment/atmosphere/spolar_asr_sdev |
| quality_assessment_atmosphere_global_grnd_detect_max: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: global ground detection frequency maximum value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The global ground detection frequency gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: global_grnd_detect_max fullnamepath: /quality_assessment/atmosphere/global_grnd_detect_max |
| quality_assessment_atmosphere_global_grnd_detect_sdev: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: global ground detection frequency standard deviation value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The global ground detection frequency gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: global_grnd_detect_sdev fullnamepath: /quality_assessment/atmosphere/global_grnd_detect_sdev |
| quality_assessment_atmosphere_spolar_transcloud_frac_min: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: south polar transmissive cloud fraction minimum value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The south polar transmissive cloud fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: spolar_transcloud_frac_min fullnamepath: /quality_assessment/atmosphere/spolar_transcloud_frac_min |
| quality_assessment_atmosphere_npolar_grnd_detect_sdev: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: north polar ground detection frequency standard deviation value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The north polar ground detection frequency gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: npolar_grnd_detect_sdev fullnamepath: /quality_assessment/atmosphere/npolar_grnd_detect_sdev |
| quality_assessment_atmosphere_npolar_grnd_detect_max: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: north polar ground detection frequency maximum value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The north polar ground detection frequency gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: npolar_grnd_detect_max fullnamepath: /quality_assessment/atmosphere/npolar_grnd_detect_max |
| quality_assessment_atmosphere_npolar_lowcloud_frac_sdev: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: north polar low (<= 4km) cloud fraction standard deviation value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The north polar low (<= 4km) cloud fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: npolar_lowcloud_frac_sdev fullnamepath: /quality_assessment/atmosphere/npolar_lowcloud_frac_sdev |
| quality_assessment_atmosphere_npolar_lowcloud_frac_mean: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: north polar low (<= 4km) cloud fraction mean value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The north polar low (<= 4km) cloud fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: npolar_lowcloud_frac_mean fullnamepath: /quality_assessment/atmosphere/npolar_lowcloud_frac_mean |
| quality_assessment_atmosphere_global_column_od_mean: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: global (over water) total column optical depth mean value units: 1 source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 4.000000000 contentType: qualityInformation description: The global (over water) total column optical depth gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.5. Maximum value may exceed 1.5 (e.g., 2.94870949). origname: global_column_od_mean fullnamepath: /quality_assessment/atmosphere/global_column_od_mean |
| quality_assessment_atmosphere_spolar_totalcloud_frac_max: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: south polar total cloud fraction maximum value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The south polar total cloud fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: spolar_totalcloud_frac_max fullnamepath: /quality_assessment/atmosphere/spolar_totalcloud_frac_max |
| quality_assessment_atmosphere_npolar_opaquecloud_frac_mean: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: north polar opaque cloud fraction mean value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The north polar opaque cloud fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: npolar_opaquecloud_frac_mean fullnamepath: /quality_assessment/atmosphere/npolar_opaquecloud_frac_mean |
| quality_assessment_atmosphere_npolar_opaquecloud_frac_max: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: north polar opaque cloud fraction maximum value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The north polar opaque cloud fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: npolar_opaquecloud_frac_max fullnamepath: /quality_assessment/atmosphere/npolar_opaquecloud_frac_max |
| quality_assessment_atmosphere_global_column_od_max: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: global (over water) total column optical depth maximum value units: 1 source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 4.000000000 contentType: qualityInformation description: The global (over water) total column optical depth gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.5. Maximum value may exceed 1.5 (e.g., 2.94870949). origname: global_column_od_max fullnamepath: /quality_assessment/atmosphere/global_column_od_max |
| quality_assessment_atmosphere_npolar_asr_min: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: north polar apparent surface reflectance minimum value units: 1 source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 3.000000000 contentType: qualityInformation description: The north polar apparent surface reflectance gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.19374275). origname: npolar_asr_min fullnamepath: /quality_assessment/atmosphere/npolar_asr_min |
| quality_assessment_atmosphere_npolar_lowcloud_frac_max: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: north polar low (<= 4km) cloud fraction maximum value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The north polar low (<= 4km) cloud fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: npolar_lowcloud_frac_max fullnamepath: /quality_assessment/atmosphere/npolar_lowcloud_frac_max |
| quality_assessment_atmosphere_npolar_opaquecloud_frac_min: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: north polar opaque cloud fraction minimum value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The north polar opaque cloud fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: npolar_opaquecloud_frac_min fullnamepath: /quality_assessment/atmosphere/npolar_opaquecloud_frac_min |
| quality_assessment_atmosphere_npolar_transcloud_frac_min: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: north polar transmissive cloud fraction minimum value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The north polar transmissive cloud fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: npolar_transcloud_frac_min fullnamepath: /quality_assessment/atmosphere/npolar_transcloud_frac_min |
| quality_assessment_atmosphere_global_column_od_sdev: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: global (over water) total column optical depth standard deviation value units: 1 source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 4.000000000 contentType: qualityInformation description: The global (over water) total column optical depth gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.5. Maximum value may exceed 1.5 (e.g., 2.94870949). origname: global_column_od_sdev fullnamepath: /quality_assessment/atmosphere/global_column_od_sdev |
| quality_assessment_atmosphere_spolar_lorate_blowing_snow_freq_min: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: south polar low-rate blowing snow frequency minimum value units: percent source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 100.0000000 contentType: qualityInformation description: The south polar low-rate blowing snow frequency gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. origname: spolar_lorate_blowing_snow_freq_min fullnamepath: /quality_assessment/atmosphere/spolar_lorate_blowing_snow_freq_min |
| quality_assessment_atmosphere_spolar_hirate_blowing_snow_freq_max: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: south polar high-rate blowing snow frequency maximum value units: percent source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 100.0000000 contentType: qualityInformation description: The south polar high-rate blowing snow frequency gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. origname: spolar_hirate_blowing_snow_freq_max fullnamepath: /quality_assessment/atmosphere/spolar_hirate_blowing_snow_freq_max |
| quality_assessment_atmosphere_spolar_lorate_blowing_snow_freq_mean: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: south polar low-rate blowing snow frequency mean value units: percent source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 100.0000000 contentType: qualityInformation description: The south polar low-rate blowing snow frequency gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. origname: spolar_lorate_blowing_snow_freq_mean fullnamepath: /quality_assessment/atmosphere/spolar_lorate_blowing_snow_freq_mean |
| quality_assessment_atmosphere_npolar_grnd_detect_mean: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: north polar ground detection frequency mean value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The north polar ground detection frequency gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: npolar_grnd_detect_mean fullnamepath: /quality_assessment/atmosphere/npolar_grnd_detect_mean |
| quality_assessment_atmosphere_spolar_asr_mean: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: south polar apparent surface reflectance mean value units: 1 source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 3.000000000 contentType: qualityInformation description: The south polar apparent surface reflectance gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.57377338). origname: spolar_asr_mean fullnamepath: /quality_assessment/atmosphere/spolar_asr_mean |
| quality_assessment_atmosphere_global_column_od_min: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: global (over water) total column optical depth minimum value units: 1 source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 4.000000000 contentType: qualityInformation description: The global (over water) total column optical depth gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.5. Maximum value may exceed 1.5 (e.g., 2.94870949). origname: global_column_od_min fullnamepath: /quality_assessment/atmosphere/global_column_od_min |
| quality_assessment_atmosphere_npolar_lowcloud_frac_min: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: north polar low (<= 4km) cloud fraction minimum value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The north polar low (<= 4km) cloud fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: npolar_lowcloud_frac_min fullnamepath: /quality_assessment/atmosphere/npolar_lowcloud_frac_min |
| quality_assessment_atmosphere_spolar_grnd_detect_min: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: south polar ground detection frequency minimum value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The south polar ground detection frequency gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: spolar_grnd_detect_min fullnamepath: /quality_assessment/atmosphere/spolar_grnd_detect_min |
| quality_assessment_atmosphere_spolar_transcloud_frac_mean: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: south polar transmissive cloud fraction mean value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The south polar transmissive cloud fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: spolar_transcloud_frac_mean fullnamepath: /quality_assessment/atmosphere/spolar_transcloud_frac_mean |
| quality_assessment_atmosphere_npolar_hirate_blowing_snow_freq_sdev: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: north polar high-rate blowing snow frequency standard deviation value units: percent source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 100.0000000 contentType: qualityInformation description: The north polar high-rate blowing snow frequency gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. origname: npolar_hirate_blowing_snow_freq_sdev fullnamepath: /quality_assessment/atmosphere/npolar_hirate_blowing_snow_freq_sdev |
| quality_assessment_atmosphere_global_cloud_frac_min: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: global cloud fraction minimum value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The global cloud fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: global_cloud_frac_min fullnamepath: /quality_assessment/atmosphere/global_cloud_frac_min |
| quality_assessment_atmosphere_npolar_midcloud_frac_sdev: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: north polar middle (> 4km and <= 8km) cloud fraction standard deviation value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The north polar middle (> 4km and <= 8km) cloud fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: npolar_midcloud_frac_sdev fullnamepath: /quality_assessment/atmosphere/npolar_midcloud_frac_sdev |
| quality_assessment_atmosphere_global_asr_max: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: global apparent surface reflectance maximum value units: 1 source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 3.000000000 contentType: qualityInformation description: The global apparent surface reflectance gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.57377338). origname: global_asr_max fullnamepath: /quality_assessment/atmosphere/global_asr_max |
| quality_assessment_atmosphere_spolar_lowcloud_frac_max: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: south polar low (<= 4km) cloud fraction maximum value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The south polar low (<= 4km) cloud fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: spolar_lowcloud_frac_max fullnamepath: /quality_assessment/atmosphere/spolar_lowcloud_frac_max |
| quality_assessment_atmosphere_npolar_hirate_blowing_snow_freq_min: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: north polar high-rate blowing snow frequency minimum value units: percent source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 100.0000000 contentType: qualityInformation description: The north polar high-rate blowing snow frequency gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. origname: npolar_hirate_blowing_snow_freq_min fullnamepath: /quality_assessment/atmosphere/npolar_hirate_blowing_snow_freq_min |
| quality_assessment_atmosphere_npolar_totalcloud_frac_min: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: north polar total cloud fraction minimum value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The north polar total cloud fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: npolar_totalcloud_frac_min fullnamepath: /quality_assessment/atmosphere/npolar_totalcloud_frac_min |
| quality_assessment_atmosphere_global_aerosol_frac_max: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: global aerosol fraction maximum value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The global aerosol fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: global_aerosol_frac_max fullnamepath: /quality_assessment/atmosphere/global_aerosol_frac_max |
| quality_assessment_atmosphere_global_cloud_frac_max: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: global cloud fraction maximum value source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The global cloud fraction gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. units: fraction origname: global_cloud_frac_max fullnamepath: /quality_assessment/atmosphere/global_cloud_frac_max |
| quality_assessment_atmosphere_npolar_lorate_blowing_snow_freq_min: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: north polar low-rate blowing snow frequency minimum value units: percent source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 100.0000000 contentType: qualityInformation description: The north polar low-rate blowing snow frequency gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. origname: npolar_lorate_blowing_snow_freq_min fullnamepath: /quality_assessment/atmosphere/npolar_lorate_blowing_snow_freq_min |
| quality_assessment_atmosphere_spolar_hirate_blowing_snow_freq_sdev: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: south polar high-rate blowing snow frequency standard deviation value units: percent source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 100.0000000 contentType: qualityInformation description: The south polar high-rate blowing snow frequency gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. origname: spolar_hirate_blowing_snow_freq_sdev fullnamepath: /quality_assessment/atmosphere/spolar_hirate_blowing_snow_freq_sdev |
| quality_assessment_atmosphere_spolar_hirate_blowing_snow_freq_min: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: south polar high-rate blowing snow frequency minimum value units: percent source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 100.0000000 contentType: qualityInformation description: The south polar high-rate blowing snow frequency gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. origname: spolar_hirate_blowing_snow_freq_min fullnamepath: /quality_assessment/atmosphere/spolar_hirate_blowing_snow_freq_min |
| quality_assessment_atmosphere_npolar_transcloud_frac_mean: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: north polar transmissive cloud fraction mean value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The north polar transmissive cloud fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: npolar_transcloud_frac_mean fullnamepath: /quality_assessment/atmosphere/npolar_transcloud_frac_mean |
| quality_assessment_atmosphere_spolar_highcloud_frac_min: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: south polar high (> 8km) cloud fraction minimum value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The south polar high (> 8km) cloud fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: spolar_highcloud_frac_min fullnamepath: /quality_assessment/atmosphere/spolar_highcloud_frac_min |
| quality_assessment_atmosphere_spolar_hirate_blowing_snow_freq_mean: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: south polar high-rate blowing snow frequency mean value units: percent source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 100.0000000 contentType: qualityInformation description: The south polar high-rate blowing snow frequency gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 100.0. origname: spolar_hirate_blowing_snow_freq_mean fullnamepath: /quality_assessment/atmosphere/spolar_hirate_blowing_snow_freq_mean |
| quality_assessment_atmosphere_global_cloud_frac_sdev: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: global cloud fraction standard deviation value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The global cloud fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: global_cloud_frac_sdev fullnamepath: /quality_assessment/atmosphere/global_cloud_frac_sdev |
| quality_assessment_atmosphere_npolar_highcloud_frac_mean: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: north polar high (> 8km) cloud fraction mean value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The north polar high (> 8km) cloud fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: npolar_highcloud_frac_mean fullnamepath: /quality_assessment/atmosphere/npolar_highcloud_frac_mean |
| quality_assessment_atmosphere_npolar_midcloud_frac_min: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: north polar lmiddle (> 4km and <= 8km) cloud fraction minimum value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The north polar middle (> 4km and <= 8km) cloud fraction gridded array minimum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: npolar_midcloud_frac_min fullnamepath: /quality_assessment/atmosphere/npolar_midcloud_frac_min |
| quality_assessment_atmosphere_global_cloud_frac_mean: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: global cloud fraction mean value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The global cloud fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: global_cloud_frac_mean fullnamepath: /quality_assessment/atmosphere/global_cloud_frac_mean |
| quality_assessment_atmosphere_spolar_asr_max: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: south polar apparent surface reflectance maximum value units: 1 source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 3.000000000 contentType: qualityInformation description: The south polar apparent surface reflectance gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.57377338). origname: spolar_asr_max fullnamepath: /quality_assessment/atmosphere/spolar_asr_max |
| quality_assessment_atmosphere_npolar_asr_sdev: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: north polar apparent surface reflectance standard deviation value units: 1 source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 3.000000000 contentType: qualityInformation description: The north polar apparent surface reflectance gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.19374275). origname: npolar_asr_sdev fullnamepath: /quality_assessment/atmosphere/npolar_asr_sdev |
| quality_assessment_atmosphere_spolar_grnd_detect_sdev: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: south polar ground detection frequency standard deviation value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The south polar ground detection frequency gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: spolar_grnd_detect_sdev fullnamepath: /quality_assessment/atmosphere/spolar_grnd_detect_sdev |
| quality_assessment_atmosphere_npolar_midcloud_frac_mean: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: north polar middle (> 4km and <= 8km) cloud fraction mean value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The north polar middle (> 4km and <= 8km) cloud fraction gridded array mean value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: npolar_midcloud_frac_mean fullnamepath: /quality_assessment/atmosphere/npolar_midcloud_frac_mean |
| quality_assessment_atmosphere_npolar_totalcloud_frac_sdev: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: north polar total cloud fraction standard deviation value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The north polar total cloud fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: npolar_totalcloud_frac_sdev fullnamepath: /quality_assessment/atmosphere/npolar_totalcloud_frac_sdev |
| quality_assessment_atmosphere_npolar_transcloud_frac_sdev: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: north polar transmissive cloud fraction standard deviation value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The north polar transmissive cloud fraction gridded array standard deviation value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: npolar_transcloud_frac_sdev fullnamepath: /quality_assessment/atmosphere/npolar_transcloud_frac_sdev |
| quality_assessment_atmosphere_spolar_grnd_detect_max: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: south polar ground detection frequency maximum value units: fraction source: L3B ATM ATBD, Section 3.10, Section 5.0, Table 7. valid_min: 0.000000000 valid_max: 1.000000000 contentType: qualityInformation description: The south polar ground detection frequency gridded array maximum value for all VALID cells as a scalar statistical parameter. Type: floating point. Value range: minimum: 0.0, maximum: 1.0. origname: spolar_grnd_detect_max fullnamepath: /quality_assessment/atmosphere/spolar_grnd_detect_max |
| spolar_asr: | Array of 32 bit Reals [spolar_grid_lat = 0..59][spolar_grid_lon = 0..239] _FillValue: 3.402823466e+38 long_name: South Polar Apparent Surface Reflectance (0-1) units: 1 source: ATM L3B ATBD, Section 3.5, Section 5.0, Table 5. valid_min: 0.000000000 valid_max: 1.000000000 contentType: modelResult description: The south polar apparent surface reflectance (ASR) two-dimensional atmospheric gridded parameter. For each south polar grid cell this represents the ratio of the summation of the detected surface signal apparent surface reflectivity 25 Hz (high-rate profile) observations (apparent_surf_reflec () > 0.0) to the number of detected surface signal ASR 25 Hz (high-rate profile) observations (spolar_asr_obs_grid (i,j)) in the cell. The gridded average south polar ASR values are produced when the number of detected surface signal ASR 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (spolar_asr_obs_grid (i,j) => obs_minimum); otherwise set to INVALID. ASR represents the true surface reflectivity modified by the two-way atmospheric transmission. Generally a number between 0.0 and 1.0. ASR is related to the ratio of the received energy to the transmitted energy, assuming a Lambertian surface reflectance. The ATL09 required surface signal apparent surface reflectance (apparent_surf_reflec ()) values are determined in the L3A ATM high-rate profile processing. Grid array organization: spolar_asr (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given monthly polar_grid_lon_scale = 1.5 degrees and polar_grid_lat_scale = 0.5 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the gridded array dimension: is spolar_asr (240,60), type: floating point. Reference: spolar_asr (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "spolar_asr_img" in the ATL17 product. The applicable south polar observation counts for this atmosphere gridded parameter are available from: spolar_asr_obs_grid (i,j). Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.57377338). Image will be limited to the range of 0.0 to 1.0. coordinates: spolar_grid_lon spolar_grid_lat origname: spolar_asr fullnamepath: /spolar_asr |
| npolar_transcloud_frac_img: | Array of Bytes [FakeDim4 = 0..637][FakeDim5 = 0..561][FakeDim3 = 0..2] CLASS: IMAGE IMAGE_VERSION: 1.2 IMAGE_SUBCLASS: IMAGE_TRUECOLOR INTERLACE_MODE: INTERLACE_PIXEL origname: npolar_transcloud_frac_img fullnamepath: /npolar_transcloud_frac_img |
| global_column_od_img: | Array of Bytes [FakeDim1 = 0..723][FakeDim2 = 0..1026][FakeDim3 = 0..2] CLASS: IMAGE IMAGE_VERSION: 1.2 IMAGE_SUBCLASS: IMAGE_TRUECOLOR INTERLACE_MODE: INTERLACE_PIXEL origname: global_column_od_img fullnamepath: /global_column_od_img |
| delta_time_beg: | Array of 64 bit Reals [FakeDim0 = 0..0] long_name: start time standard_name: time units: seconds since 2018-01-01 source: L3B ATM ATBD, Section 5.0, Table 5. contentType: auxiliaryInformation description: The start time scalar parameter (start_time). The start time/date of the data used to make the product. Number of GPS seconds since the ATLAS SDP epoch at the beginning of the data collection. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. Type: double precision. origname: delta_time_beg fullnamepath: /delta_time_beg |
| npolar_midcloud_frac_img: | Array of Bytes [FakeDim4 = 0..637][FakeDim5 = 0..561][FakeDim3 = 0..2] CLASS: IMAGE IMAGE_VERSION: 1.2 IMAGE_SUBCLASS: IMAGE_TRUECOLOR INTERLACE_MODE: INTERLACE_PIXEL origname: npolar_midcloud_frac_img fullnamepath: /npolar_midcloud_frac_img |
| global_cloud_aerosol_obs_grid: | Array of 32 bit Reals [global_grid_lat = 0..179][global_grid_lon = 0..359] long_name: global cloud and aerosol fraction observation grid units: 1 source: ATM L3B ATBD, Section 3.9, Table 4., Section 5.0, Table 5. contentType: modelResult description: The global cloud fraction and aerosol fraction observation count two-dimensional gridded parameter. The number of observations used to compute the global cloud fraction and the global aerosol fraction. This number represents all 25 Hz (high-rate profile) observations in each cell. Only 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1) in each grid cell are used to compute the cell global cloud fraction (global_cloud_frac (i,j)). Only 25 Hz (high-rate profile) observations with at least one aerosol layer (layer_attr (,) = 2) in each grid cell are used to compute the cell global aerosol fraction (global_aerosol_frac (i,j)). Given equivalent 25 Hz (high-rate profile) observation counts for cloud fraction and aerosol fraction, this grid array is loaded from the global cloud fraction total observation counts. Grid array organization: global_cloud_aerosol_obs_grid (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the monthly global_grid_lon_scale = 1.0 degrees and the global_grid_lat_scale = 1.0 degrees, the monthly global gridded array dimension is: global_cloud_aerosol_obs_grid (360,180), type: floating point. Reference: global_cloud_aerosol_obs_grid (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the global projection array. The global observation counts are applicable to these atmosphere gridded parameters: global_cloud_frac (i,j), global_aerosol_frac (i,j), and global_grnd_detect (i,j). coordinates: global_grid_lon global_grid_lat origname: global_cloud_aerosol_obs_grid fullnamepath: /global_cloud_aerosol_obs_grid |
| npolar_lorate_blowing_snow_freq: | Array of 32 bit Reals [npolar_grid_lat = 0..59][npolar_grid_lon = 0..239] _FillValue: 3.402823466e+38 long_name: North Polar Low-Rate Blowing Snow Frequency (percent) units: percent source: ATM L3B ATBD, Section 3.4, Section 5.0, Table 5. valid_min: 0.000000000 valid_max: 100.0000000 contentType: modelResult description: The north polar low-rate blowing snow frequency two-dimensional atmospheric gridded parameter. For each north polar grid cell this represents the ratio of the number of the valid detected blowing snow layer top height 1 Hz (low-rate profile) observations (bsnow_h () .ne. INVALID and bsnow_h () > 0.0) to the number of valid blowing snow confidence flag (bsnow_con () .ne. INVALID, exceeds the surface not detected value, i.e., bsnow_con () > -3, and is implemented as bsnow_con () => -2) 1 Hz (low-rate profile) observations (npolar_lorate_bsnow_obs_grid (i,j)); the ratio is multiplied by 100.0 to obtain percent. The gridded north polar low-rate blowing snow frequency values are produced when the number of valid blowing snow confidence flag 1 Hz (low-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (npolar_lorate_bsnow_obs_grid (i,j) => obs_minimum); otherwise set to INVALID. The ATL09 required blowing snow height (bsnow_h ()) and blowing snow confidence (bsnow_con ()) values are determined in the L3A ATM low-rate profile processing. Grid array organization: npolar_lorate_blowing_snow_freq (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the monthly polar_grid_lon_scale = 1.5 degrees and the polar_grid_lat_scale = 0.5 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the monthly gridded array dimension is: npolar_lorate_blowing_snow_freq (240,60), type: floating point. Reference: npolar_lorate_blowing_snow_freq (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "npolar_lorate_blowing_snow_freq_img" in the ATL17 product. The applicable north polar observation counts for this atmosphere gridded parameter are available from: npolar_lorate_bsnow_obs_grid (i,j). Value range: minimum: 0.0, maximum: 100.0. coordinates: npolar_grid_lon npolar_grid_lat origname: npolar_lorate_blowing_snow_freq fullnamepath: /npolar_lorate_blowing_snow_freq |
| global_asr: | Array of 32 bit Reals [global_grid_lat = 0..179][global_grid_lon = 0..359] _FillValue: 3.402823466e+38 long_name: Global Apparent Surface Reflectance (0-1) units: 1 source: ATM L3B ATBD, Section 3.5, Section 5.0, Table 5. valid_min: 0.000000000 valid_max: 1.000000000 contentType: modelResult description: The global average apparent surface reflectance (ASR) two-dimensional atmospheric gridded parameter. For each global grid cell this represents the ratio of the summation of the detected surface signal apparent surface reflectivity 25 Hz (high-rate profile) observations (apparent_surf_reflec () > 0.0) to the number of detected surface signal ASR 25 Hz (high-rate profile) observations (global_asr_obs_grid (i,j)) in the cell. The gridded average global ASR values are produced when the number of detected surface signal ASR 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (global_asr_obs_grid (i,j) => obs_minimum); otherwise set to INVALID. ASR represents the true surface reflectivity modified by the two-way atmospheric transmission. Generally a number between 0.0 and 1.0. ASR is related to the ratio of the received energy to the transmitted energy, assuming a Lambertian surface reflectance. The ATL09 required surface signal apparent surface reflectance (apparent_surf_reflec ()) values are determined in the L3A ATM high-rate profile processing. Grid array organization: global_asr (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the monthly global_grid_lon_scale = 1.0 degrees and the global_grid_lat_scale = 1.0 degrees, the gridded array dimension is: global_asr (360,180), type: floating point. Reference: global_asr (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the global projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "global_asr_img" in the ATL17 product. The applicable global observation counts for this atmosphere gridded parameter are available from: global_asr_obs_grid (i,j). Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.5737738). Image will be limited to the range of 0.0 to 1.0. coordinates: global_grid_lon global_grid_lat origname: global_asr fullnamepath: /global_asr |
| npolar_totalcloud_frac_img: | Array of Bytes [FakeDim4 = 0..637][FakeDim5 = 0..561][FakeDim3 = 0..2] CLASS: IMAGE IMAGE_VERSION: 1.2 IMAGE_SUBCLASS: IMAGE_TRUECOLOR INTERLACE_MODE: INTERLACE_PIXEL origname: npolar_totalcloud_frac_img fullnamepath: /npolar_totalcloud_frac_img |
| spolar_asr_img: | Array of Bytes [FakeDim4 = 0..637][FakeDim5 = 0..561][FakeDim3 = 0..2] CLASS: IMAGE IMAGE_VERSION: 1.2 IMAGE_SUBCLASS: IMAGE_TRUECOLOR INTERLACE_MODE: INTERLACE_PIXEL origname: spolar_asr_img fullnamepath: /spolar_asr_img |
| spolar_totalcloud_frac_img: | Array of Bytes [FakeDim4 = 0..637][FakeDim5 = 0..561][FakeDim3 = 0..2] CLASS: IMAGE IMAGE_VERSION: 1.2 IMAGE_SUBCLASS: IMAGE_TRUECOLOR INTERLACE_MODE: INTERLACE_PIXEL origname: spolar_totalcloud_frac_img fullnamepath: /spolar_totalcloud_frac_img |
| npolar_opaquecloud_frac: | Array of 32 bit Reals [npolar_grid_lat = 0..59][npolar_grid_lon = 0..239] _FillValue: 3.402823466e+38 long_name: North Polar Opaque Cloud Fraction units: fraction source: ATM L3B ATBD, Section 3.3.2, Section 5.0, Table 5. valid_min: 0.000000000 valid_max: 1.000000000 contentType: modelResult description: The north polar opaque cloud fraction two-dimensional atmospheric gridded parameter. For each north polar cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1 within cloud_flag_atm () layers) without surface signal detection (surface_sig () = 0.0) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded north polar opaque cloud fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The fraction of opaque clouds covering the entire grid cell. Opaque clouds are clouds that inhibit or absorb transmission of downward radiation through the cloud. The cloud layer with opaque characteristics exhibits no surface signal count return (=0.0), indicating that no transmitted photons reached the surface. The ATL09 required number of layers (cloud_flag_atm ()) and the layer attribute flag (layer_attr (,)) are determined from the backscatter profile using the DDA layer finder, and the required surface signal (surface_sig ()) is determined from the surface signal count of the number of photons in the detected surface bin, all in the L3A ATM high-rate profile processing. Grid array organization: npolar_opaquecloud_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the monthly polar_grid_lon_scale = 1.5 degrees and the polar_grid_lat_scale = 0.5 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the monthly gridded array dimension is: npolar_opaquecloud_frac (240,60), type: floating point. Reference: npolar_opaquecloud_frac (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "npolar_opaquecloud_frac_img" in the ATL17 product. The applicable north polar observation counts for this atmosphere gridded parameter are available from: npolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. coordinates: npolar_grid_lon npolar_grid_lat origname: npolar_opaquecloud_frac fullnamepath: /npolar_opaquecloud_frac |
| spolar_highcloud_frac: | Array of 32 bit Reals [spolar_grid_lat = 0..59][spolar_grid_lon = 0..239] _FillValue: 3.402823466e+38 long_name: South Polar High Cloud Fraction (> 8km) units: fraction source: ATM L3B ATBD, Section 3.3.1, Section 5.0, Table 5. valid_min: 0.000000000 valid_max: 1.000000000 contentType: modelResult description: The south polar high (> 8km) cloud fraction two-dimensional atmospheric gridded parameter. For each south polar grid cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1 within cloud_flag_atm () layers) that occurs above 8 km from the layer top (layer_top (,) > 8.0 within cloud_flag_atm () layers) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded south polar high cloud fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The ATL09 required number of layers (cloud_flag_atm ()), the layer attribute flag (layer_attr (,)), and the height of the detected layers (layer_top (,)) are determined from the backscatter profile using the DDA layer finder in the L3A ATM high-rate profile processing. Grid array organization: spolar_highcloud_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the monthly polar_grid_lon_scale = 1.5 degrees and the polar_grid_lat_scale = 0.5 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the monthly gridded array dimension is: spolar_highcloud_frac (240,60), type: floating point. Reference: spolar_highcloud_frac (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "spolar_highcloud_frac_img" in the ATL17 product. The applicable south polar observation counts for this atmosphere gridded parameter are available from: spolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. coordinates: spolar_grid_lon spolar_grid_lat origname: spolar_highcloud_frac fullnamepath: /spolar_highcloud_frac |
| spolar_hirate_blowing_snow_freq: | Array of 32 bit Reals [spolar_grid_lat = 0..59][spolar_grid_lon = 0..239] _FillValue: 3.402823466e+38 long_name: South Polar High-Rate Blowing Snow Frequency (percent) units: percent source: ATM L3B ATBD, Section 3.4, Section 5.0, Table 5. valid_min: 0.000000000 valid_max: 100.0000000 contentType: modelResult description: The south polar high-rate blowing snow frequency two-dimensional atmospheric gridded parameter. For each south polar grid cell this represents the ratio of the number of the valid detected blowing snow layer top height 25 Hz (high-rate profile) observations (bsnow_h () .ne. INVALID and bsnow_h () > 0.0) to the number of valid blowing snow confidence flag (bsnow_con () .ne. INVALID, exceeds the surface not detected value, i.e., bsnow_con () > -3, and is implemented as bsnow_con () => -2) 25 Hz (high-rate profile) observations (spolar_hirate_bsnow_obs_grid (i,j)); the ratio is multiplied by 100.0 to obtain percent. The gridded south polar high-rate blowing snow frequency values are produced when the number of valid blowing snow confidence flag 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (spolar_hirate_bsnow_obs_grid (i,j) => obs_minimum); otherwise set to INVALID. The ATL09 required blowing snow height (bsnow_h ()) and blowing snow confidence (bsnow_con ()) values are determined in the L3A ATM high-rate profile processing. Grid array organization: spolar_hirate_blowing_snow_freq (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the monthly polar_grid_lon_scale = 1.5 degrees and the polar_grid_lat_scale = 0.5 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the monthly gridded array dimension is: spolar_hirate_blowing_snow_freq (240,60), type: floating point. Reference: spolar_hirate_blowing_snow_freq (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "spolar_hirate_blowing_snow_freq_img" in the ATL17 product. The applicable south polar observation counts for this atmosphere gridded parameter are available from: spolar_hirate_bsnow_obs_grid (i,j). Value range: minimum: 0.0, maximum: 100.0. coordinates: spolar_grid_lon spolar_grid_lat origname: spolar_hirate_blowing_snow_freq fullnamepath: /spolar_hirate_blowing_snow_freq |
| npolar_asr: | Array of 32 bit Reals [npolar_grid_lat = 0..59][npolar_grid_lon = 0..239] _FillValue: 3.402823466e+38 long_name: North Polar Apparent Surface Reflectance (0-1) units: 1 source: ATM L3B ATBD, Section 3.5, Section 5.0, Table 5. valid_min: 0.000000000 valid_max: 1.000000000 contentType: modelResult description: The north polar apparent surface reflectance (ASR) two-dimensional atmospheric gridded parameter. For each north polar grid cell this represents the ratio of the summation of the detected surface signal apparent surface reflectivity 25 Hz (high-rate profile) observations (apparent_surf_reflec () > 0.0) to the number of detected surface signal ASR 25 Hz (high-rate profile) observations (npolar_asr_obs_grid (i,j)) in the cell. The gridded average north polar ASR values are produced when the number of detected surface signal ASR 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (npolar_asr_obs_grid (i,j) => obs_minimum); otherwise set to INVALID. ASR represents the true surface reflectivity modified by the two-way atmospheric transmission. Generally a number between 0.0 and 1.0. ASR is related to the ratio of the received energy to the transmitted energy, assuming a Lambertian surface reflectance. The ATL09 required surface signal apparent surface reflectance (apparent_surf_reflec ()) values are determined in the L3A ATM high-rate profile processing. Grid array organization: npolar_asr (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given monthly polar_grid_lon_scale = 1.5 degrees and polar_grid_lat_scale = 0.5 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the gridded array dimension: is npolar_asr (240,60), type: floating point. Reference: npolar_asr (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "npolar_asr_img" in the ATL17 product. The applicable north polar observation counts for this atmosphere gridded parameter are available from: npolar_asr_obs_grid (i,j). Expected value range: minimum: 0.0, maximum: 1.0. Maximum value may exceed 1.0 (e.g., 1.19374275). Image will be limited to the range of 0.0 to 1.0. coordinates: npolar_grid_lon npolar_grid_lat origname: npolar_asr fullnamepath: /npolar_asr |
| spolar_lorate_bsnow_obs_grid: | Array of 32 bit Reals [spolar_grid_lat = 0..59][spolar_grid_lon = 0..239] long_name: south polar low-rate blowing snow frequency observation grid units: 1 source: ATM L3B ATBD, Section 3.9, Table 4., Section 5.0, Table 5. contentType: modelResult description: The south polar low-rate blowing snow observation count two-dimensional gridded parameter. The number of low-rate profile blowing snow observations used in the computation of low-rate blowing snow frequency for the Antarctic. For each south polar grid cell this represents the number of valid blowing snow confidence 1 Hz (low-rate profile) observations (bsnow_con () .ne. INVALID), where the low-rate profile blowing snow confidence value exceeds the surface not detected value (bsnow_con () > -3, and is actually implemented as bsnow_con () => -2). Only valid detected blowing snow layer top height 1 Hz (low-rate profile) observations (bsnow_h () .ne. INVALID and bsnow_h () > 0.0) and only valid blowing snow confidence 1 Hz (low-rate profile) observations (bsnow_con () .ne. INVALID), where the low-rate blowing snow confidence value exceeds the surface not detected value (bsnow_con () > -3, and is implemented as bsnow_con () => -2) in each grid cell are used to compute the cell south polar low-rate blowing snow frequency (spolar_lorate_blowing_snow_freq (i,j)). Grid array organization: spolar_lorate_bsnow_obs_grid (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the monthly polar_grid_lon_scale = 1.5 degrees and the polar_grid_lat_scale = 0.5 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the monthly gridded array dimension is: spolar_lorate_bsnow_obs_grid (240,60), type: floating point. Reference: spolar_lorate_bsnow_obs_grid (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. The south polar observation counts are applicable to the atmosphere gridded parameter: spolar_lorate_blowing_snow_freq (i,j). coordinates: spolar_grid_lon spolar_grid_lat origname: spolar_lorate_bsnow_obs_grid fullnamepath: /spolar_lorate_bsnow_obs_grid |
| npolar_asr_img: | Array of Bytes [FakeDim4 = 0..637][FakeDim5 = 0..561][FakeDim3 = 0..2] CLASS: IMAGE IMAGE_VERSION: 1.2 IMAGE_SUBCLASS: IMAGE_TRUECOLOR INTERLACE_MODE: INTERLACE_PIXEL origname: npolar_asr_img fullnamepath: /npolar_asr_img |
| spolar_midcloud_frac: | Array of 32 bit Reals [spolar_grid_lat = 0..59][spolar_grid_lon = 0..239] _FillValue: 3.402823466e+38 long_name: South Polar Mid Cloud Fraction (> 4km and <= 8km) units: fraction source: ATM L3B ATBD, Section 3.3.1, Section 5.0, Table 5. valid_min: 0.000000000 valid_max: 1.000000000 contentType: modelResult description: The south polar middle (> 4km and <= 8km) cloud fraction two-dimensional atmospheric gridded parameter. For each south polar grid cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1 within cloud_flag_atm () layers) that occurs above 4 km and up to and including 8 km from the layer top (layer_top (,) > 4.0 and <= 8.0 within cloud_flag_atm () layers) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded south polar middle cloud fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The ATL09 required number of layers (cloud_flag_atm ()), the layer attribute flag (layer_attr (,)), and the height of the detected layers (layer_top (,)) are determined from the backscatter profile using the DDA layer finder in the L3A ATM high-rate profile processing. Grid array organization: spolar_midcloud_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the monthly polar_grid_lon_scale = 1.5 degrees and the polar_grid_lat_scale = 0.5 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the monthly gridded array dimension is: spolar_midcloud_frac (240,60), type: floating point. Reference: spolar_midcloud_frac (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "spolar_midcloud_frac_img" in the ATL17 product. The applicable south polar observation counts for this atmosphere gridded parameter are available from: spolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. coordinates: spolar_grid_lon spolar_grid_lat origname: spolar_midcloud_frac fullnamepath: /spolar_midcloud_frac |
| ancillary_data_release: | Array of Strings [FakeDim0 = 0..0] long_name: Release Number units: 1 source: Operations contentType: auxiliaryInformation description: Release number of the granule. The release number is incremented when the software or ancillary data used to create the granule has been changed. Type: character string. origname: release fullnamepath: /ancillary_data/release |
| ancillary_data_end_geoseg: | Array of 32 bit Integers [FakeDim0 = 0..0] long_name: Ending Geolocation Segment units: 1 source: Derived contentType: auxiliaryInformation description: The ending geolocation segment number associated with the data contained within this granule. ICESat-2 granule geographic regions are further refined by geolocation segments. During the geolocation process, a geolocation segment is created approximately every 20m from the start of the orbit to the end. The geolocation segments help align the ATLAS strong a weak beams and provide a common segment length for the L2 and higher products. The geolocation segment indices differ slightly from orbit-to-orbit because of the irregular shape of the Earth. The geolocation segment indices on ATL01 and ATL02 are only approximate because beams have not been aligned at the time of their creation. Type: integer. origname: end_geoseg fullnamepath: /ancillary_data/end_geoseg |
| ancillary_data_version: | Array of Strings [FakeDim0 = 0..0] long_name: Version units: 1 source: Operations contentType: auxiliaryInformation description: Version number of this granule within the release. It is a sequential number corresponding to the number of times the granule has been reprocessed for the current release. Type: character string. origname: version fullnamepath: /ancillary_data/version |
| ancillary_data_end_region: | Array of 32 bit Integers [FakeDim0 = 0..0] long_name: Ending Region units: 1 source: Derived contentType: auxiliaryInformation description: The ending product-specific region number associated with the data contained within this granule. ICESat-2 data products are separated by geographic regions. The data contained within a specific region are the same for ATL01 and ATL02. ATL03 regions differ slightly because of different geolocation segment locations caused by the irregular shape of the Earth. The region indices for other products are completely independent. Type: integer. origname: end_region fullnamepath: /ancillary_data/end_region |
| ancillary_data_atmosphere_center_weight: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: gridded image smoothing center weight factor units: 1 source: L3B ATM ATBD, Section 4.0, Section 5.0, Table 6. valid_min: 0.000000000 valid_max: 1.000000000 contentType: referenceInformation description: The center_weight is a scalar control parameter. When the gridded image data parameters are smoothed, the center weight value is used to calculate the weight factor used to scale each cell in the smoothed image production. The nominal [default] center_weight value is 0.6. An execution override is provided within the production environment for replacement of the control parameter value. Type: floating point. origname: center_weight fullnamepath: /ancillary_data/atmosphere/center_weight |
| ancillary_data_atmosphere_data_type_flag: | Array of 16 bit Integers [FakeDim0 = 0..0] long_name: data type flag control units: 1 source: L3B ATM ATBD, Section 1.0, Section 5.0, Table 6. contentType: referenceInformation description: The data type flag is a scalar control parameter. The data_type_flag value =0 [default] indicates both night and day data were used to generate the product; the data_type_flag value =1 indicates night-only data were used to generate the product. An execution override is provided within the production environment for replacement of the control parameter value. Type: integer*1. flag_meanings: process_both_day_and_night_profile_data_DEFAULT process_night_only_profile_data flag_values: 0, 1 origname: data_type_flag fullnamepath: /ancillary_data/atmosphere/data_type_flag |
| ancillary_data_atmosphere_global_grid_lat_scale: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: global grid latitude scale control units: degrees/cell source: Atmosphere ATBD, Section 1.0, Table 2., Section 5.0, Table 6. contentType: referenceInformation description: The global_grid_lat_scale is a scalar control parameter presenting the global grid cell latitude resolution (scale), in degrees per cell. The nominal [default] global_grid_lat_scale value is 1.0 degrees global latitude grid cell size for the monthly ATL17 product. An execution override is provided within the production environment for replacement of the control parameter value. Type: floating point. origname: global_grid_lat_scale fullnamepath: /ancillary_data/atmosphere/global_grid_lat_scale |
| ancillary_data_atmosphere_global_grid_lon_scale: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: global grid longitude scale control units: degrees/cell source: Atmosphere ATBD, Section 1.0, Table 2., Section 5.0, Table 6. contentType: referenceInformation description: The global_grid_lon_scale is a scalar control parameter presenting the global grid cell longitude resolution (scale), in degrees per cell. The nominal [default] global_grid_lon_scale value is 1.0 degrees global longitude grid cell size for the monthly ATL17 product. An execution override is provided within the production environment for replacement of the control parameter value. Type: floating point. origname: global_grid_lon_scale fullnamepath: /ancillary_data/atmosphere/global_grid_lon_scale |
| ancillary_data_atmosphere_obs_minimum: | Array of 16 bit Integers [FakeDim0 = 0..0] long_name: observation count minimum value control units: 1 source: L3B ATM ATBD, Section 3.8, Section 5.0, Table 6. contentType: referenceInformation description: The obs_minimum is a scalar control parameter Indicating the minimum acceptable observation count value required to compute the specific atmosphere parameter grid cell value based on the observation count in the corresponding parameter denominator cell to be used in the rational calculation. The nominal [default] obs_minimum value is 4 for the monthly minimum observation cell count for the ATL17 product. An execution override is provided within the production environment for replacement of the control parameter value. Type: integer*1. origname: obs_minimum fullnamepath: /ancillary_data/atmosphere/obs_minimum |
| ancillary_data_atmosphere_polar_grid_lat_scale: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: polar grid latitude scale control units: degrees/cell source: Atmosphere ATBD, Section 1.0, Table 2., Section 5.0, Table 6. contentType: referenceInformation description: The polar_grid_lat_scale is a scalar control parameter presenting the north or south polar grid latitude resolution (scale), in degrees per cell. The nominal [default] polar_grid_lat_scale value is 0.5 degrees polar latitude grid cell size for the monthly ATL17 product. An execution override is provided within the production environment for replacement of the control parameter value. Type: floating point. origname: polar_grid_lat_scale fullnamepath: /ancillary_data/atmosphere/polar_grid_lat_scale |
| ancillary_data_atmosphere_polar_grid_lon_scale: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: polar grid longitude scale control units: degrees/cell source: Atmosphere ATBD, Section 1.0, Table 2., Section 5.0, Table 6. contentType: referenceInformation description: The polar_grid_lon_scale is a scaler control parameter presenting the north or south polar longitude grid resolution (scale), in degrees per cell. The nominal [default] polar_grid_lon_scale value is 1.5 degrees polar longitude grid cell size for the monthly ATL17 product. An execution override is provided within the production environment for replacement of the control parameter value. Type: floating point. origname: polar_grid_lon_scale fullnamepath: /ancillary_data/atmosphere/polar_grid_lon_scale |
| ancillary_data_atmosphere_smooth_grid: | Array of 16 bit Integers [FakeDim0 = 0..0] long_name: global and polar gridded image smoothing control units: 1 source: L3B ATM ATBD, Section 4.0, Section 5.0, Table 6. valid_min: 0 valid_max: 1 contentType: referenceInformation description: The smooth_grid is a scalar control parameter for the application of the Section 4.0 smoothing algorithm to the product global, north polar, and south polar Images. The nominal [default] smooth_grid value is 1 indicates to apply the smoothing algorithm to the data used to generate the images; the smooth_grid value is 0 indicates do not apply the smoothing algorithm to the data used to generate the images. When image gridded data smoothing is selected the smoothing algorithm is applied to intermediate working data arrays for each parameter, and is NOT applied to the actual product gridded parameter arrays content (i.e., the gridded data parameters remain un-smoothed). An execution override is provided within the production environment for replacement of the control parameter value. Type: integer*1. flag_meanings: apply_smoothing_to_image_data_DEFAULT do_not_apply_smoothing_to_image_data flag_values: 1, 0 origname: smooth_grid fullnamepath: /ancillary_data/atmosphere/smooth_grid |
| ancillary_data_atlas_sdp_gps_epoch: | Array of 64 bit Reals [FakeDim0 = 0..0] long_name: ATLAS Epoch Offset units: seconds since 1980-01-06T00:00:00.000000Z source: Operations contentType: auxiliaryInformation description: Number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS Standard Data Product (SDP) epoch (2018-01-01:T00.00.00.000000 UTC). Add this value to delta time parameters to compute full gps_seconds (relative to the GPS epoch) for each data point. Type: double precision. origname: atlas_sdp_gps_epoch fullnamepath: /ancillary_data/atlas_sdp_gps_epoch |
| ancillary_data_end_rgt: | Array of 32 bit Integers [FakeDim0 = 0..0] long_name: Ending Reference Groundtrack units: 1 source: Derived valid_min: 1 valid_max: 1387 contentType: auxiliaryInformation description: The ending reference ground track (RGT) number associated with the data contained within this granule. There are 1387 reference ground track in the ICESat-2 repeat orbit. The reference ground track increments each time the spacecraft completes a full orbit of the Earth and resets to 1 each time the spacecraft completes a full cycle. Type: integer. origname: end_rgt fullnamepath: /ancillary_data/end_rgt |
| ancillary_data_end_delta_time: | Array of 64 bit Reals [FakeDim0 = 0..0] long_name: ATLAS End Time (Actual) standard_name: time units: seconds since 2018-01-01 source: Derived contentType: auxiliaryInformation description: Number of GPS seconds since the ATLAS SDP epoch at the last data point in the file. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. Type: double precision. origname: end_delta_time fullnamepath: /ancillary_data/end_delta_time |
| ancillary_data_end_orbit: | Array of 32 bit Integers [FakeDim0 = 0..0] long_name: Ending Orbit Number units: 1 source: Derived contentType: auxiliaryInformation description: The ending orbit number associated with the data contained within this granule. The orbit number increments each time the spacecraft completes a full orbit of the Earth. Type: integer. origname: end_orbit fullnamepath: /ancillary_data/end_orbit |
| ancillary_data_start_cycle: | Array of 32 bit Integers [FakeDim0 = 0..0] long_name: Starting Cycle units: 1 source: Derived valid_min: 0 valid_max: 99 contentType: auxiliaryInformation description: The starting cycle number associated with the data contained within this granule. The cycle number is the counter of the number of 91-day repeat cycles completed by the mission. Type: integer. origname: start_cycle fullnamepath: /ancillary_data/start_cycle |
| ancillary_data_data_end_utc: | Array of Strings [FakeDim0 = 0..0] long_name: End UTC Time of Granule (CCSDS-A, Actual) units: 1 source: Derived contentType: auxiliaryInformation description: UTC (in CCSDS-A format) of the last data point within the granule. Type: character string. origname: data_end_utc fullnamepath: /ancillary_data/data_end_utc |
| ancillary_data_control: | Array of Strings [FakeDim0 = 0..0] long_name: Control File units: 1 source: Operations contentType: auxiliaryInformation description: PGE-specific control file used to generate this granule. To re-use, replace breaks (BR) with linefeeds. Type: character string. origname: control fullnamepath: /ancillary_data/control |
| ancillary_data_start_gpssow: | Array of 64 bit Reals [FakeDim0 = 0..0] long_name: Start GPS SOW of Granule (Actual) units: seconds source: Derived contentType: auxiliaryInformation description: GPS seconds-of-week of the first data point in the granule. Type: double precision. origname: start_gpssow fullnamepath: /ancillary_data/start_gpssow |
| ancillary_data_granule_end_utc: | Array of Strings [FakeDim0 = 0..0] long_name: End UTC Time of Granule (CCSDS-A, Requested) units: 1 source: Derived contentType: auxiliaryInformation description: Requested end time (in UTC CCSDS-A) of this granule. Type: character string. origname: granule_end_utc fullnamepath: /ancillary_data/granule_end_utc |
| ancillary_data_end_cycle: | Array of 32 bit Integers [FakeDim0 = 0..0] long_name: Ending Cycle units: 1 source: Derived valid_min: 0 valid_max: 99 contentType: auxiliaryInformation description: The ending cycle number associated with the data contained within this granule. The cycle number is the counter of the number of 91-day repeat cycles completed by the mission. Type: integer. origname: end_cycle fullnamepath: /ancillary_data/end_cycle |
| ancillary_data_granule_start_utc: | Array of Strings [FakeDim0 = 0..0] long_name: Start UTC Time of Granule (CCSDS-A, Requested) units: 1 source: Derived contentType: auxiliaryInformation description: Requested start time (in UTC CCSDS-A) of this granule. Type: character string. origname: granule_start_utc fullnamepath: /ancillary_data/granule_start_utc |
| ancillary_data_start_delta_time: | Array of 64 bit Reals [FakeDim0 = 0..0] long_name: ATLAS Start Time (Actual) standard_name: time units: seconds since 2018-01-01 source: Derived contentType: auxiliaryInformation description: Number of GPS seconds since the ATLAS SDP epoch at the first data point in the file. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. Type: double precision. origname: start_delta_time fullnamepath: /ancillary_data/start_delta_time |
| ancillary_data_start_geoseg: | Array of 32 bit Integers [FakeDim0 = 0..0] long_name: Starting Geolocation Segment units: 1 source: Derived contentType: auxiliaryInformation description: The starting geolocation segment number associated with the data contained within this granule. ICESat-2 granule geographic regions are further refined by geolocation segments. During the geolocation process, a geolocation segment is created approximately every 20m from the start of the orbit to the end. The geolocation segments help align the ATLAS strong a weak beams and provide a common segment length for the L2 and higher products. The geolocation segment indices differ slightly from orbit-to-orbit because of the irregular shape of the Earth. The geolocation segment indices on ATL01 and ATL02 are only approximate because beams have not been aligned at the time of their creation. Type: integer. origname: start_geoseg fullnamepath: /ancillary_data/start_geoseg |
| ancillary_data_start_orbit: | Array of 32 bit Integers [FakeDim0 = 0..0] long_name: Starting Orbit Number units: 1 source: Derived contentType: auxiliaryInformation description: The starting orbit number associated with the data contained within this granule. The orbit number increments each time the spacecraft completes a full orbit of the Earth. Type: integer. origname: start_orbit fullnamepath: /ancillary_data/start_orbit |
| ancillary_data_data_start_utc: | Array of Strings [FakeDim0 = 0..0] long_name: Start UTC Time of Granule (CCSDS-A, Actual) units: 1 source: Derived contentType: auxiliaryInformation description: UTC (in CCSDS-A format) of the first data point within the granule. Type: character string. origname: data_start_utc fullnamepath: /ancillary_data/data_start_utc |
| ancillary_data_end_gpsweek: | Array of 32 bit Integers [FakeDim0 = 0..0] long_name: Ending GPSWeek of Granule (Actual) units: weeks from 1980-01-06 source: Derived contentType: auxiliaryInformation description: GPS week number of the last data point in the granule. Type: integer. origname: end_gpsweek fullnamepath: /ancillary_data/end_gpsweek |
| ancillary_data_start_rgt: | Array of 32 bit Integers [FakeDim0 = 0..0] long_name: Starting Reference Groundtrack units: 1 source: Derived valid_min: 1 valid_max: 1387 contentType: auxiliaryInformation description: The starting reference ground track (RGT) number associated with the data contained within this granule. There are 1387 reference ground track in the ICESat-2 repeat orbit. The reference ground track increments each time the spacecraft completes a full orbit of the Earth and resets to 1 each time the spacecraft completes a full cycle. Type: integer. origname: start_rgt fullnamepath: /ancillary_data/start_rgt |
| ancillary_data_end_gpssow: | Array of 64 bit Reals [FakeDim0 = 0..0] long_name: Ending GPS SOW of Granule (Actual) units: seconds source: Derived contentType: auxiliaryInformation description: GPS seconds-of-week of the last data point in the granule. Type: double precision. origname: end_gpssow fullnamepath: /ancillary_data/end_gpssow |
| ancillary_data_start_region: | Array of 32 bit Integers [FakeDim0 = 0..0] long_name: Starting Region units: 1 source: Derived contentType: auxiliaryInformation description: The starting product-specific region number associated with the data contained within this granule. ICESat-2 data products are separated by geographic regions. The data contained within a specific region are the same for ATL01 and ATL02. ATL03 regions differ slightly because of different geolocation segment locations caused by the irregular shape of the Earth. The region indices for other products are completely independent. Type: integer. origname: start_region fullnamepath: /ancillary_data/start_region |
| ancillary_data_start_gpsweek: | Array of 32 bit Integers [FakeDim0 = 0..0] long_name: Start GPSWeek of Granule (Actual) units: weeks from 1980-01-06 source: Derived contentType: auxiliaryInformation description: GPS week number of the first data point in the granule. Type: integer. origname: start_gpsweek fullnamepath: /ancillary_data/start_gpsweek |
| spolar_lorate_blowing_snow_freq: | Array of 32 bit Reals [spolar_grid_lat = 0..59][spolar_grid_lon = 0..239] _FillValue: 3.402823466e+38 long_name: South Polar Low-Rate Blowing Snow Frequency (percent) units: percent source: ATM L3B ATBD, Section 3.4, Section 5.0, Table 5. valid_min: 0.000000000 valid_max: 100.0000000 contentType: modelResult description: The south polar low-rate blowing snow frequency two-dimensional atmospheric gridded parameter. For each south polar grid cell this represents the ratio of the number of the valid detected blowing snow layer top height 1 Hz (low-rate profile) observations (bsnow_h () .ne. INVALID and bsnow_h () > 0.0) to the number of valid blowing snow confidence flag (bsnow_con () .ne. INVALID, exceeds the surface not detected value, i.e., bsnow_con () > -3, and is implemented as bsnow_con () => -2) 1 Hz (low-rate profile) observations (spolar_lorate_bsnow_obs_grid (i,j)); the ratio is multiplied by 100.0 to obtain percent. The gridded south polar low-rate blowing snow frequency values are produced when the number of valid blowing snow confidence flag 1 Hz (low-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (spolar_lorate_bsnow_obs_grid (i,j) => obs_minimum); otherwise set to INVALID. The ATL09 required blowing snow height (bsnow_h ()) and blowing snow confidence (bsnow_con ()) values are determined in the L3A ATM low-rate profile processing. Grid array organization: spolar_lorate_blowing_snow_freq (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the monthly polar_grid_lon_scale = 1.5 degrees and the polar_grid_lat_scale = 0.5 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the monthly gridded array dimension is: spolar_lorate_blowing_snow_freq (240,60), type: floating point. Reference: spolar_lorate_blowing_snow_freq (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "spolar_lorate_blowing_snow_freq_img" in the ATL17 product. The applicable south polar observation counts for this atmosphere gridded parameter are available from: spolar_lorate_bsnow_obs_grid (i,j). Value range: minimum: 0.0, maximum: 100.0. coordinates: spolar_grid_lon spolar_grid_lat origname: spolar_lorate_blowing_snow_freq fullnamepath: /spolar_lorate_blowing_snow_freq |
| spolar_transcloud_frac: | Array of 32 bit Reals [spolar_grid_lat = 0..59][spolar_grid_lon = 0..239] _FillValue: 3.402823466e+38 long_name: South Polar Transmissive Cloud Fraction units: fraction source: ATM L3B ATBD, Section 3.3.2, Section 5.0, Table 5. valid_min: 0.000000000 valid_max: 1.000000000 contentType: modelResult description: The south polar transmissive cloud fraction two-dimensional atmospheric gridded parameter. For each south polar cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1 within cloud_flag_atm () layers) with surface signal detection (surface_sig () > 0.0) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded south polar transmissive cloud fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The fraction of transmissive clouds covering the entire grid cell. Transmissive clouds are clouds that permit or allow transmission of downward radiation through the cloud. The ATL09 required number of layers (cloud_flag_atm ()) and the layer attribute flag (layer_attr (,)) are determined from the backscatter profile using the DDA layer finder, and the required detected surface signal (surface_sig ()) is determined from the surface signal count of the number of photons in the detected surface bin, all in the L3A ATM high-rate profile processing. Grid array organization: spolar_transcloud_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the monthly polar_grid_lon_scale = 1.5 degrees and the polar_grid_lat_scale = 0.5 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the monthly gridded array dimension is: spolar_transcloud_frac (240,60), type: floating point. Reference: spolar_transcloud_frac (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "spolar_transcloud_frac_img" in the ATL17 product. The applicable south polar observation counts for this atmosphere gridded parameter are available from: spolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. coordinates: spolar_grid_lon spolar_grid_lat origname: spolar_transcloud_frac fullnamepath: /spolar_transcloud_frac |
| global_cloud_frac: | Array of 32 bit Reals [global_grid_lat = 0..179][global_grid_lon = 0..359] _FillValue: 3.402823466e+38 long_name: Global Cloud Fraction units: fraction source: ATM L3B ATBD, Section 3.1, Section 5.0, Table 5. valid_min: 0.000000000 valid_max: 1.000000000 contentType: modelResult description: The global cloud fraction two-dimensional atmospheric gridded parameter. For each global grid cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1 within cloud_flag_atm () layers) to the number of all 25 Hz (high-rate profile) observations (global_cloud_aerosol_obs_grid (i,j)) in the cell. The gridded global cloud fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (global_cloud_aerosol_obs_grid (i,j) => obs_minimum); otherwise set to INVALID. The ATL09 required number of layers (cloud_flag_atm ()) and the layer attribute flag (layer_attr (,)) are determined from the backscatter profile using the DDA layer finder in the L3A ATM high-rate profile processing. A cloud fraction value of 0.0 represents a totally cloud free grid cell; a cloud fraction value of 1.0 indicates the grid cell is completely covered with clouds. Grid array organization: global_cloud_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given monthly global_grid_lon_scale = 1.0 degrees and global_grid_lat_scale = 1.0 degrees, gridded array dimension: global_cloud_frac (360,180), type: floating point. Reference: global_cloud_frac (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the global projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "global_cloud_frac_img" in the ATL17 product. The applicable global observation counts for this atmosphere gridded parameter are available from: global_cloud_aerosol_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. coordinates: global_grid_lon global_grid_lat origname: global_cloud_frac fullnamepath: /global_cloud_frac |
| spolar_cloud_obs_grid: | Array of 32 bit Reals [spolar_grid_lat = 0..59][spolar_grid_lon = 0..239] long_name: south polar cloud observation grid units: 1 source: ATM L3B ATBD, Section 3.9, Table 4., Section 5.0, Table 5. contentType: modelResult description: The south polar total cloud fraction observation count two-dimensional gridded parameter. The number of observations used to compute the south polar total cloud fraction. This number represents all 25 Hz (high-rate profile) observations in each cell. Only 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1) in each grid cell are used to compute the cell south polar total cloud fraction (spolar_totlcloud_frac (i,j)). Grid array organization: spolar_cloud_obs_grid (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the monthly polar_grid_lon_scale = 1.5 degrees and the polar_grid_lat_scale = 0.5 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the monthly gridded array dimension is: spolar_cloud_obs_grid (240,60), type: floating point. Reference: spolar_cloud_obs_grid (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. The south polar observation counts are applicable to these atmosphere gridded parameters: spolar_lowcloud_frac (i,j), spolar_midcloud_frac (i,j), spolar_highcloud_frac (i,j), spolar_totalcloud_frac (i,j), spolar_transcloud_frac (i,j), spolar_opaquecloud_frac (i,j), and spolar_grnd_detect (i,j). coordinates: spolar_grid_lon spolar_grid_lat origname: spolar_cloud_obs_grid fullnamepath: /spolar_cloud_obs_grid |
| spolar_transcloud_frac_img: | Array of Bytes [FakeDim4 = 0..637][FakeDim5 = 0..561][FakeDim3 = 0..2] CLASS: IMAGE IMAGE_VERSION: 1.2 IMAGE_SUBCLASS: IMAGE_TRUECOLOR INTERLACE_MODE: INTERLACE_PIXEL origname: spolar_transcloud_frac_img fullnamepath: /spolar_transcloud_frac_img |
| spolar_opaquecloud_frac: | Array of 32 bit Reals [spolar_grid_lat = 0..59][spolar_grid_lon = 0..239] _FillValue: 3.402823466e+38 long_name: South Polar Opaque Cloud Fraction units: fraction source: ATM L3B ATBD, Section 3.3.2, Section 5.0, Table 5. valid_min: 0.000000000 valid_max: 1.000000000 contentType: modelResult description: The south polar opaque cloud fraction two-dimensional atmospheric gridded parameter. For each south polar cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr () = 1 within cloud_flag_atm () layers) without surface signal detection (surface_sig () = 0.0) to the number of all 25 Hz (high-rate profile) observations in the cell. The gridded south polar opaque cloud fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (=> obs_minimum); otherwise set to INVALID. The fraction of opaque clouds covering the entire grid cell. Opaque clouds are clouds that inhibit or absorb transmission of downward radiation through the cloud. The cloud layer with opaque characteristics exhibits no surface signal count return (=0.0), indicating that no transmitted photons reached the surface. The ATL09 required number of layers (cloud_flag_atm ()) and the layer attribute flag (layer_attr (,)) are determined from the backscatter profile using the DDA layer finder, and the required surface signal (surface_sig ()) is determined from the surface signal count of the number of photons in the detected surface bin, all in the L3A ATM high-rate profile processing. Grid array organization: spolar_opaquecloud_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the monthly polar_grid_lon_scale = 1.5 degrees and the polar_grid_lat_scale = 0.5 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the monthly gridded array dimension is: spolar_opaquecloud_frac (240,60), type: floating point. Reference: spolar_opaquecloud_frac (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "spolar_opaquecloud_frac_img" in the ATL17 product. The applicable south polar observation counts for this atmosphere gridded parameter are available from: spolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. coordinates: spolar_grid_lon spolar_grid_lat origname: spolar_opaquecloud_frac fullnamepath: /spolar_opaquecloud_frac |
| global_aerosol_frac_img: | Array of Bytes [FakeDim1 = 0..723][FakeDim2 = 0..1026][FakeDim3 = 0..2] CLASS: IMAGE IMAGE_VERSION: 1.2 IMAGE_SUBCLASS: IMAGE_TRUECOLOR INTERLACE_MODE: INTERLACE_PIXEL origname: global_aerosol_frac_img fullnamepath: /global_aerosol_frac_img |
| npolar_lowcloud_frac_img: | Array of Bytes [FakeDim4 = 0..637][FakeDim5 = 0..561][FakeDim3 = 0..2] CLASS: IMAGE IMAGE_VERSION: 1.2 IMAGE_SUBCLASS: IMAGE_TRUECOLOR INTERLACE_MODE: INTERLACE_PIXEL origname: npolar_lowcloud_frac_img fullnamepath: /npolar_lowcloud_frac_img |
| npolar_totalcloud_frac: | Array of 32 bit Reals [npolar_grid_lat = 0..59][npolar_grid_lon = 0..239] _FillValue: 3.402823466e+38 long_name: North Polar Total Cloud Fraction units: fraction source: ATM L3B ATBD, Section 3.3.1, Section 5.0, Table 5. valid_min: 0.000000000 valid_max: 1.000000000 contentType: modelResult description: The north polar total cloud fraction two-dimensional atmospheric gridded parameter. For each north polar grid cell this represents the ratio of the number of 25 Hz (high-rate profile) observations with at least one cloud layer (layer_attr (,) = 1 within cloud_flag_atm () layers) to the number of all 25 Hz (high-rate profile) observations (npolar_cloud_obs_grid (i,j)) in the cell. The gridded north polar total cloud fraction values are produced when the number of all 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (npolar_cloud_obs_grid (i,j) => obs_minimum); otherwise set to INVALID. The ATL09 required number of layers (cloud_flag_atm ()) and the layer attribute flag (layer_attr (,)) are determined from the backscatter profile using the DDA layer finder in the L3A ATM high-rate profile processing. Grid array organization: npolar_totalcloud_frac (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the monthly polar_grid_lon_scale = 1.5 degrees and the polar_grid_lat_scale = 0.5 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the monthly gridded array dimension is: npolar_totalcloud_frac (240,60), type: floating point. Reference: npolar_totalcloud_frac (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "npolar_totalcloud_frac_img" in the ATL17 product. The applicable north polar observation counts for this atmosphere gridded parameter are available from: npolar_cloud_obs_grid (i,j). Value range: minimum: 0.0, maximum: 1.0. coordinates: npolar_grid_lon npolar_grid_lat origname: npolar_totalcloud_frac fullnamepath: /npolar_totalcloud_frac |
| npolar_opaquecloud_frac_img: | Array of Bytes [FakeDim4 = 0..637][FakeDim5 = 0..561][FakeDim3 = 0..2] CLASS: IMAGE IMAGE_VERSION: 1.2 IMAGE_SUBCLASS: IMAGE_TRUECOLOR INTERLACE_MODE: INTERLACE_PIXEL origname: npolar_opaquecloud_frac_img fullnamepath: /npolar_opaquecloud_frac_img |
| spolar_midcloud_frac_img: | Array of Bytes [FakeDim4 = 0..637][FakeDim5 = 0..561][FakeDim3 = 0..2] CLASS: IMAGE IMAGE_VERSION: 1.2 IMAGE_SUBCLASS: IMAGE_TRUECOLOR INTERLACE_MODE: INTERLACE_PIXEL origname: spolar_midcloud_frac_img fullnamepath: /spolar_midcloud_frac_img |
| global_cloud_frac_img: | Array of Bytes [FakeDim1 = 0..723][FakeDim2 = 0..1026][FakeDim3 = 0..2] CLASS: IMAGE IMAGE_VERSION: 1.2 IMAGE_SUBCLASS: IMAGE_TRUECOLOR INTERLACE_MODE: INTERLACE_PIXEL origname: global_cloud_frac_img fullnamepath: /global_cloud_frac_img |
| spolar_hirate_bsnow_obs_grid: | Array of 32 bit Reals [spolar_grid_lat = 0..59][spolar_grid_lon = 0..239] long_name: south polar high-rate blowing snow frequency observation grid units: 1 source: ATM L3B ATBD, Section 3.9, Table 4., Section 5.0, Table 5. contentType: modelResult description: The south polar high-rate blowing snow observation count two-dimensional gridded parameter. The number of high-rate profile blowing snow observations used in the computation of high-rate blowing snow frequency for the Antarctic. For each south polar grid cell this represents the number of valid blowing snow confidence 25 Hz (high-rate profile) observations (bsnow_con () .ne. INVALID), where the high-rate profile blowing snow confidence value exceeds the surface not detected value (bsnow_con () > -3, and is actually implemented as bsnow_con () => -2). Only valid detected blowing snow layer top height 25 Hz (high-rate profile) observations (bsnow_h () .ne. INVALID and bsnow_h () > 0.0) and only valid blowing snow confidence 25 Hz (high-rate profile) observations (bsnow_con () .ne. INVALID), where the high-rate blowing snow confidence value exceeds the surface not detected value (bsnow_con () > -3, and is implemented as bsnow_con () => -2) in each grid cell are used to compute the cell south polar high-rate blowing snow frequency (spolar_hirate_blowing_snow_freq (i,j)). Grid array organization: spolar_hirate_bsnow_obs_grid (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the monthly polar_grid_lon_scale = 1.5 degrees and the polar_grid_lat_scale = 0.5 degrees, and the south polar latitude range is: -90.0 up to -60.0 degrees, the monthly gridded array dimension is: spolar_hirate_bsnow_obs_grid (240,60), type: floating point. Reference: spolar_hirate_bsnow_obs_grid (1,1) = (-180.0 degrees longitude, -90.0 degrees latitude), representing the lower left corner of the gridded parameter cell in the south polar projection array. The south polar observation counts are applicable to the atmosphere gridded parameter: spolar_hirate_blowing_snow_freq (i,j). coordinates: spolar_grid_lon spolar_grid_lat origname: spolar_hirate_bsnow_obs_grid fullnamepath: /spolar_hirate_bsnow_obs_grid |
| npolar_hirate_blowing_snow_freq: | Array of 32 bit Reals [npolar_grid_lat = 0..59][npolar_grid_lon = 0..239] _FillValue: 3.402823466e+38 long_name: North Polar High-Rate Blowing Snow Frequency (percent) units: percent source: ATM L3B ATBD, Section 3.4, Section 5.0, Table 5. valid_min: 0.000000000 valid_max: 100.0000000 contentType: modelResult description: The north polar high-rate blowing snow frequency two-dimensional atmospheric gridded parameter. For each north polar grid cell this represents the ratio of the number of the valid detected blowing snow layer top height 25 Hz (high-rate profile) observations (bsnow_h () .ne. INVALID and bsnow_h () > 0.0) to the number of valid blowing snow confidence flag (bsnow_con () .ne. INVALID, exceeds the surface not detected value, i.e., bsnow_con () > -3, and is implemented as bsnow_con () => -2) 25 Hz (high-rate profile) observations (npolar_hirate_bsnow_obs_grid (i,j)); the ratio is multiplied by 100.0 to obtain percent. The gridded north polar high-rate blowing snow frequency values are produced when the number of valid blowing snow confidence flag 25 Hz (high-rate profile) observations is equal to or greater than the minimum number of observations required for each grid cell (npolar_hirate_bsnow_obs_grid (i,j) => obs_minimum); otherwise set to INVALID. The ATL09 required blowing snow height (bsnow_h ()) and blowing snow confidence (bsnow_con ()) values are determined in the L3A ATM high-rate profile processing. Grid array organization: npolar_hirate_blowing_snow_freq (i,j), where i=longitude index, j=latitude index, as per ATBD Section 2.0. Given the monthly polar_grid_lon_scale = 1.5 degrees and the polar_grid_lat_scale = 0.5 degrees, and the north polar latitude range is: +90.0 down to +60.0 degrees, the monthly gridded array dimension is: npolar_hirate_blowing_snow_freq (240,60), type: floating point. Reference: npolar_hirate_blowing_snow_freq (1,1) = (-180.0 degrees longitude, +90.0 degrees latitude), representing the upper left corner of the gridded parameter cell in the north polar projection array. Post-processing by the "atlas_plot" utility program using "plot_atl16.py" will generate and embed the image for this gridded parameter identified as "npolar_hirate_blowing_snow_freq_img" in the ATL17 product. The applicable north polar observation counts for this atmosphere gridded parameter are available from: npolar_hirate_bsnow_obs_grid (i,j). Value range: minimum: 0.0, maximum: 100.0. coordinates: npolar_grid_lon npolar_grid_lat origname: npolar_hirate_blowing_snow_freq fullnamepath: /npolar_hirate_blowing_snow_freq |
| global_grid_lat: | Array of 64 bit Reals [global_grid_lat = 0..179] long_name: global grid latitude standard_name: latitude units: degrees_north source: ATM L3B ATBD, Section 2.0, Section 5.0, Table 5. valid_min: -90.000000000000000 valid_max: 90.000000000000000 contentType: referenceInformation description: The global grid latitude one-dimensional array parameter, with the latitudes applicable to each global grid cell. ATL09 ATM histogram top latitude (latitude ()) derived from the ATM range window geolocation. Based on WGS84 Earth-centered, Earth-fixed terrestrial reference system and geodetic data. Direction: North=+ values. Range of latitude values: -90.0 to +90.0 degrees, with a step size of global_grid_lat_scale. Grid array organization: global_grid_lat (j), where j=latitude index, as per ATBD Section 2.0. Given monthly global_grid_lat_scale = 1.0 degrees, array dimension: global_grid_lat (180), type: double precision. Comprises the y-grid axis for global gridded parameters. Reference: global_grid_lat (1) = -90.0 degrees, at the lower left corner of a global gridded parameter cell location (i,j) = (1,1). coordinates: global_grid_lat origname: global_grid_lat fullnamepath: /global_grid_lat |
| global_grid_lon: | Array of 64 bit Reals [global_grid_lon = 0..359] long_name: global grid longitude standard_name: longitude units: degrees_east source: ATM L3B ATBD, Section 2.0, Section 5.0, Table 5. valid_min: -180.00000000000000 valid_max: 180.00000000000000 contentType: referenceInformation description: The global grid longitude one-dimensional array parameter, with the longitudes applicable to each global grid cell. The ATL09 ATM histogram top longitude (longitude()) derived from the ATM range window geolocation. Based on WGS84 Earth-centered, Earth-fixed terrestrial reference system and geodetic data. Direction: East=+ values. Range of longitude values: -180.0 to +180.0 degrees, with a step size of global_grid_lon_scale. Grid array organization: global_grid_lon (i), where i=longitude index, as per ATBD Section 2.0. Given monthly global_grid_lon_scale = 1.0 degrees, array dimension: global_grid_lon (360), type: double precision. Comprises the x-grid axis for global gridded parameters. Reference: global_grid_lon (1) = -180.0 degrees, at the lower left corner of a global gridded parameter cell location (i,j) = (1,1). coordinates: global_grid_lon origname: global_grid_lon fullnamepath: /global_grid_lon |
| npolar_grid_lat: | Array of 64 bit Reals [npolar_grid_lat = 0..59] long_name: north polar grid latitude standard_name: latitude units: degrees_north source: ATM L3B ATBD, Section 2.0, Section 5.0, Table 5. valid_min: 60.000000000000000 valid_max: 90.000000000000000 contentType: referenceInformation description: The north polar grid latitude one-dimensional array parameter, with the latitudes applicable to each north polar grid cell. ATL09 ATM histogram top latitude (latitude ()) derived from the ATM range window geolocation. Based on WGS84 Earth-centered, Earth-fixed terrestrial reference system and geodetic data. Direction: North=+ values. Range of latitude values: +90.0 down to +60.0 degrees, with a step size of polar_grid_lat_scale. Grid array organization: npolar_grid_lat (j), where j=latitude index, as per ATBD Section 2.0. Given monthly polar_grid_lat_scale = 0.5 degrees, the monthly array dimension is: npolar_grid_lat (60), type: double precision. Comprises the y-grid axis for north polar gridded parameters. Reference: npolar_grid_lat (1) = +90.0 degrees, at the upper left corner of a north polar gridded parameter cell location (i,j) = (1,1). coordinates: npolar_grid_lat origname: npolar_grid_lat fullnamepath: /npolar_grid_lat |
| npolar_grid_lon: | Array of 64 bit Reals [npolar_grid_lon = 0..239] long_name: north polar grid longitude standard_name: longitude units: degrees_east source: ATM L3B ATBD, Section 2.0, Section 5.0, Table 5. valid_min: -180.00000000000000 valid_max: 180.00000000000000 contentType: referenceInformation description: The north polar grid longitude one-dimensional array parameter, with the longitudes applicable to each north polar grid cell. ATL09 ATM histogram top longitude (longitude ()) derived from the ATM range window geolocation. Based on WGS84 Earth-centered, Earth-fixed terrestrial reference system and geodetic data. Direction: East=+ values. Range of longitude values: -180.0 to +180.0 degrees, with a step size of polar_grid_lon_scale. Grid array organization: npolar_grid_lon (i), where i=longitude index, as per ATBD Section 2.0. Given monthly polar_grid_lon_scale = 1.5 degrees, the monthly array dimension is: npolar_grid_lon (240), type: double precision. Comprises the x-grid axis for north polar gridded parameters. Reference: npolar_grid_lon (1) = -180.0 degrees, at the upper left corner of a north polar gridded parameter cell location (i,j) = (1,1). coordinates: npolar_grid_lon origname: npolar_grid_lon fullnamepath: /npolar_grid_lon |
| orbit_info_crossing_time: | Array of 64 bit Reals [orbit_info_crossing_time = 0..436] long_name: Ascending Node Crossing Time standard_name: time units: seconds since 2018-01-01 source: POD/PPD contentType: referenceInformation description: The time, in seconds since the ATLAS SDP GPS Epoch, at which the ascending node crosses the equator. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. Type: double precision. origname: crossing_time fullnamepath: /orbit_info/crossing_time |
| orbit_info_sc_orient_time: | Array of 64 bit Reals [orbit_info_sc_orient_time = 0..0] long_name: Time of Last Spacecraft Orientation Change standard_name: time units: seconds since 2018-01-01 source: POD/PPD contentType: referenceInformation description: The time of the last spacecraft orientation change between forward, backward and transitional flight modes, expressed in seconds since the ATLAS SDP GPS Epoch. ICESat-2 is considered to be flying forward when the weak beams are leading the strong beams; and backward when the strong beams are leading the weak beams. ICESat-2 is considered to be in transition while it is maneuvering between the two orientations. Science quality is potentially degraded while in transition mode. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. Type: double precision. origname: sc_orient_time fullnamepath: /orbit_info/sc_orient_time |
| spolar_grid_lat: | Array of 64 bit Reals [spolar_grid_lat = 0..59] long_name: south polar grid latitude standard_name: latitude units: degrees_south source: ATM L3B ATBD, Section 2.0, Section 5.0, Table 5. valid_min: -90.000000000000000 valid_max: -60.000000000000000 contentType: referenceInformation description: The south polar grid latitude one-dimensional array parameter, with the latitudes applicable to each south polar grid cell. ATL09 ATM histogram top latitude (latitude ()) derived from the ATM range window geolocation. Based on WGS84 Earth-centered, Earth-fixed terrestrial reference system and geodetic data. Direction: South=- values. Range of latitude values: -90.0 up to -60.0 degrees, with a step size of polar_grid_lat_scale. Grid array organization: spolar_grid_lat (j), where j=latitude index, as per ATBD Section 2.0. Given monthly polar_grid_lat_scale = 0.5 degrees, the monthly array dimension is: spolar_grid_lat (60), type: double precision. Comprises the y-grid axis for south polar gridded parameters. Reference: spolar_grid_lat (1) = -90.0 degrees, at the lower left corner of a south polar gridded parameter cell location (i,j) = (1,1). coordinates: spolar_grid_lat origname: spolar_grid_lat fullnamepath: /spolar_grid_lat |
| spolar_grid_lon: | Array of 64 bit Reals [spolar_grid_lon = 0..239] long_name: south polar grid longitude standard_name: longitude units: degrees_east source: ATM L3B ATBD, Section 2.0, Section 5.0, Table 5. valid_min: -180.00000000000000 valid_max: 180.00000000000000 contentType: referenceInformation description: The south polar grid longitude one-dimensional array parameter, with the longitudes applicable to each south polar grid cell. ATL09 ATM histogram top longitude (longitude ()) derived from the ATM range window geolocation. Based on WGS84 Earth-centered, Earth-fixed terrestrial reference system and geodetic data. Direction: East=+ values. Range of longitude values: -180.0 to +180.0 degrees, with a step size of polar_grid_lon_scale. Grid array organization: spolar_grid_lon (i), where i=longitude index, as per ATBD Section 2.0. Given monthly polar_grid_lon_scale = 1.5 degrees, the monthly array dimension is: spolar_grid_lon (240), type: double precision. Comprises the x-grid axis for south polar gridded parameters. Reference: spolar_grid_lon (1) = -180.0 degrees, at the lower left corner of a south polar gridded parameter cell location (i,j) = (1,1). coordinates: spolar_grid_lon origname: spolar_grid_lon fullnamepath: /spolar_grid_lon |
| FakeDim0: | Array of 32 bit Integers [FakeDim0 = 0..0] units: level |
| FakeDim1: | Array of 32 bit Integers [FakeDim1 = 0..723] units: level |
| FakeDim2: | Array of 32 bit Integers [FakeDim2 = 0..1026] units: level |
| FakeDim3: | Array of 32 bit Integers [FakeDim3 = 0..2] units: level |
| FakeDim4: | Array of 32 bit Integers [FakeDim4 = 0..637] units: level |
| FakeDim5: | Array of 32 bit Integers [FakeDim5 = 0..561] units: level |