| GDAL_AREA_OR_POINT: | Area |
| Conventions: | CF-1.7 |
| short_name: | ATL14 |
| level: | L3B |
| contributor_name: | Benjamin Smith (besmith@uw.edu), Tyler Sutterley (tsutterl@uw.edu), Suzanne Dickinson (sdickins@uw.edu), Benjamin Jelley (benjamin.p.jelley@nasa.gov), Denis Felikson (denis.felikson@nasa.gov), Thomas A Neumann (thomas.neumann@nasa.gov), Helen Fricker (hafricker@ucsd.edu), Aimee Gibbons (aimee.c.gibbons@nasa.gov), Christine Sadlik (christine.c.sadlik@nasa.gov), Laurence Padman (padman@esr.org), Thorsten Markus (thorsten.markus@nasa.gov), Nathan Kurtz (nathan.t.kurtz@nasa.gov), Suneel Bhardwaj (suneel.bhardwaj@nasa.gov), David W Hancock III (david.w.hancock@nasa.gov), Jeffrey Lee (jeffrey.e.lee@nasa.gov) |
| contributor_role: | Investigator, Investigator, Algorithm Developer, Algorithm Developer, Investigator, Investigator, Investigator, Investigator, Investigator, Investigator, Investigator, Investigator, Investigator, Investigator, Algorithm Developer |
| date_type: | UTC |
| geospatial_lat_max: | -60.881516331468902 |
| geospatial_lat_min: | -89.500000000000000 |
| geospatial_lat_units: | degrees_north |
| geospatial_lon_max: | 0.0000000000000000 |
| geospatial_lon_min: | -90.000000000000000 |
| geospatial_lon_units: | degrees_east |
| granule_type: | ATL14 |
| 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 |
| reference_frame: | ITRF2014 |
| shortName: | ATL14_META |
| spatial_coverage_type: | Horizontal |
| standard_name_vocabulary: | CF-1.6 |
| time_type: | CCSDS UTC-A |
| vertical_datum: | WGS84 |
| date_created: | 2025-12-16T16:54:58.796863Z |
| fileName: | ATL14_A2_0328_100m_005_01.nc |
| history: | 2025-12-16T16:54:58.796863Z |
| identifier_file_uuid: | 61b782e6-c009-40a3-a4cc-dc9a2dac46f9 |
| identifier_product_format_version: | 3.0 |
| netcdfversion: | 4.9.3 |
| time_coverage_duration: | 206405487.20833063 |
| time_coverage_end: | 2025-07-16T22:56:22.208331Z |
| time_coverage_start: | 2019-01-01T00:04:55.000000Z |
| publisher_name: | NSIDC DAAC > NASA National Snow and Ice Data Center Distributed Active Archive Center |
| publisher_email: | nsidc@nsidc.org |
| publisher_url: | http://nsidc.org/daac/ |
| title: | ATLAS/ICESat-2 L3B Gridded Antarctic and Arctic Land Ice Height |
| identifier_product_type: | ATL14 |
| identifier_product_doi: | doi:10.5067/ATLAS/ATL14.005 |
| institution: | National Aeronautics and Space Administration (NASA) |
| creator_name: | GSFC I-SIPS > ICESat-2 Science Investigator-led Processing System |
| description: | The ICESat-2 ATL14 standard data product reports a high resolution (100 m) digital elevation model (DEM) which is a spatially continuous view of surface height for the ice sheet. |
| summary: | The purpose of ATL14 is to provide an IceSat-2 gridded satellite summary of heights of land-based ice. |
| keywords: | EARTH SCIENCE > CRYOSPHERE > GLACIERS/ICE SHEETS > GLACIER ELEVATION/ICE SHEET ELEVATION > 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 |
| Unlimited_Dimension: | orbit_info_bounding_polygon_dim1 |
| orbit_info_bounding_polygon_lat1: | Array of 32 bit Reals [orbit_info_bounding_polygon_dim1 = 0..53] long_name: Polygon vertex latitude units: degrees North source: model valid_min: -90.00000000 valid_max: 90.00000000 contentType: modelResult description: Polygon extent vertex latitude origname: bounding_polygon_lat1 fullnamepath: /orbit_info/bounding_polygon_lat1 coordinates: orbit_info_bounding_polygon_dim1 |
| orbit_info_bounding_polygon_lon1: | Array of 32 bit Reals [orbit_info_bounding_polygon_dim1 = 0..53] long_name: Polygon vertex longitude units: degrees East source: model valid_min: -180.0000000 valid_max: 180.0000000 contentType: modelResult description: Polygon extent vertex longitude origname: bounding_polygon_lon1 fullnamepath: /orbit_info/bounding_polygon_lon1 coordinates: orbit_info_bounding_polygon_dim1 |
| METADATA_iso_19139_dataset_xml: | Array of Strings [FakeDim0 = 0..0] long_name: ISO 19139 Dataset XML description: ISO 19139 Dataset XML origname: iso_19139_dataset_xml fullnamepath: /METADATA/iso_19139_dataset_xml |
| METADATA_iso_19139_series_xml: | Array of Strings [FakeDim0 = 0..0] long_name: ISO 19139 Series XML description: ISO 19139 Series XML origname: iso_19139_series_xml fullnamepath: /METADATA/iso_19139_series_xml |
| misfit_rms: | Array of 32 bit Reals [y = 0..22700][x = 0..26700] _FillValue: 3.402823466e+38 units: meters dimensions: y, x datatype: float32 coordinates: y x least_significant_digit: None description: Root-mean_square of the residuals associated with each DEM node long_name: DEM per-node data residual source: 5.2.4.4 grid_mapping: Polar_Stereographic origname: misfit_rms fullnamepath: /misfit_rms |
| tile_stats_sigma_tt: | Array of 32 bit Reals [tile_stats_y = 0..56][tile_stats_x = 0..65] _FillValue: 3.402823466e+38 units: meters years^-2 dimensions: y, x datatype: float32 description: weighting values for the constraint equations on the second temporal derivatives of the surface height long_name: sigma_tt source: 4.1.2.1 origname: sigma_tt fullnamepath: /tile_stats/sigma_tt grid_mapping: tile_stats_Polar_Stereographic coordinates: tile_stats_y tile_stats_x |
| tile_stats_RMS_d2z0dx2: | Array of 32 bit Reals [tile_stats_y = 0..56][tile_stats_x = 0..65] _FillValue: 3.402823466e+38 units: meters^-1 dimensions: y, x datatype: float32 description: root mean square of the constraint equation residuals for the second spatial derivative of z0 long_name: RMS_d2z0dx2 source: 4.1.2.1 origname: RMS_d2z0dx2 fullnamepath: /tile_stats/RMS_d2z0dx2 grid_mapping: tile_stats_Polar_Stereographic coordinates: tile_stats_y tile_stats_x |
| tile_stats_RMS_d2zdt2: | Array of 32 bit Reals [tile_stats_y = 0..56][tile_stats_x = 0..65] _FillValue: 3.402823466e+38 units: meters years^2 dimensions: y, x datatype: float32 description: root mean square of the constraint equation residuals for the second temporal derivative of dz long_name: RMS_d2zdt2 source: 4.1.2.1 origname: RMS_d2zdt2 fullnamepath: /tile_stats/RMS_d2zdt2 grid_mapping: tile_stats_Polar_Stereographic coordinates: tile_stats_y tile_stats_x |
| tile_stats_N_bias: | Array of 32 bit Integers [tile_stats_y = 0..56][tile_stats_x = 0..65] _FillValue: 2147483647 units: counts dimensions: y, x datatype: int32 description: number of bias values solved for long_name: N_bias source: 4.1.2.1 origname: N_bias fullnamepath: /tile_stats/N_bias grid_mapping: tile_stats_Polar_Stereographic coordinates: tile_stats_y tile_stats_x |
| tile_stats_RMS_data: | Array of 32 bit Reals [tile_stats_y = 0..56][tile_stats_x = 0..65] _FillValue: 3.402823466e+38 units: meters dimensions: y, x datatype: float32 description: root mean of squared, scaled data misfits long_name: RMS_data source: 4.1.2.1 origname: RMS_data fullnamepath: /tile_stats/RMS_data grid_mapping: tile_stats_Polar_Stereographic coordinates: tile_stats_y tile_stats_x |
| tile_stats_Polar_Stereographic: | 16 bit Integer standard_name: Polar_Stereographic grid_mapping_name: polar_stereographic straight_vertical_longitude_from_pole: 0.0000000000000000 latitude_of_projection_origin: -90.000000000000000 standard_parallel: -71.000000000000000 scale_factor_at_projection_origin: 1.0000000000000000 false_easting: 0.0000000000000000 false_northing: 0.0000000000000000 semi_major_axis: 6378.1369999999997 semi_minor_axis: 6356.7520000000004 inverse_flattening: 298.25722356300003 spatial_epsg: 3031 spatial_ref: PROJCS["WGS 84 / Antarctic Polar Stereographic",GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4326"]],PROJECTION["Polar_Stereographic"],PARAMETER["latitude_of_origin",-71],PARAMETER["central_meridian",0],PARAMETER["scale_factor",1],PARAMETER["false_easting",0],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","3031"]] crs_wkt: PROJCS["WGS 84 / Antarctic Polar Stereographic",GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4326"]],PROJECTION["Polar_Stereographic"],PARAMETER["latitude_of_origin",-71],PARAMETER["central_meridian",0],PARAMETER["scale_factor",1],PARAMETER["false_easting",0],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","3031"]] GeoTransform: -2640000.0 40000.0 0.0 0.0 0.0 40000.0 origname: Polar_Stereographic fullnamepath: /tile_stats/Polar_Stereographic |
| tile_stats_sigma_xxt: | Array of 32 bit Reals [tile_stats_y = 0..56][tile_stats_x = 0..65] _FillValue: 3.402823466e+38 units: meters^-1 years^-1 dimensions: y, x datatype: float32 description: weighting values for the constraint equations on the second spatial derivatives of the height-change rate long_name: sigma_xxt source: 4.1.2.1 origname: sigma_xxt fullnamepath: /tile_stats/sigma_xxt grid_mapping: tile_stats_Polar_Stereographic coordinates: tile_stats_y tile_stats_x |
| tile_stats_RMS_bias: | Array of 32 bit Reals [tile_stats_y = 0..56][tile_stats_x = 0..65] _FillValue: 3.402823466e+38 units: meters dimensions: y, x datatype: float32 description: root mean of squared, scaled bias values long_name: RMS_bias source: 4.1.2.1 origname: RMS_bias fullnamepath: /tile_stats/RMS_bias grid_mapping: tile_stats_Polar_Stereographic coordinates: tile_stats_y tile_stats_x |
| tile_stats_N_data: | Array of 32 bit Integers [tile_stats_y = 0..56][tile_stats_x = 0..65] _FillValue: 2147483647 units: counts dimensions: y, x datatype: int32 description: number of data used in fit long_name: N_data source: 4.1.2.1 origname: N_data fullnamepath: /tile_stats/N_data grid_mapping: tile_stats_Polar_Stereographic coordinates: tile_stats_y tile_stats_x |
| tile_stats_RMS_d2zdx2dt: | Array of 32 bit Reals [tile_stats_y = 0..56][tile_stats_x = 0..65] _FillValue: 3.402823466e+38 units: meters^-1 years^-1 dimensions: y, x datatype: float32 description: root mean square of the constraint equation residuals for the second temporal derivative of dz/dt long_name: RMS_d2zdx2dt source: 4.1.2.1 origname: RMS_d2zdx2dt fullnamepath: /tile_stats/RMS_d2zdx2dt grid_mapping: tile_stats_Polar_Stereographic coordinates: tile_stats_y tile_stats_x |
| tile_stats_sigma_xx0: | Array of 32 bit Reals [tile_stats_y = 0..56][tile_stats_x = 0..65] _FillValue: 3.402823466e+38 units: meters^-1 dimensions: y, x datatype: float32 description: weighting values for the constraint equations on the second spatial derivatives of the DEM long_name: sigma_xx0 source: 4.1.2.1 origname: sigma_xx0 fullnamepath: /tile_stats/sigma_xx0 grid_mapping: tile_stats_Polar_Stereographic coordinates: tile_stats_y tile_stats_x |
| misfit_scaled_rms: | Array of 32 bit Reals [y = 0..22700][x = 0..26700] _FillValue: 3.402823466e+38 units: counts dimensions: y, x datatype: float32 coordinates: y x least_significant_digit: None description: Root-mean_square of the error-scaled residuals associated with each DEM node long_name: DEM per-node scaled data uncertainty source: 5.2.4.4 grid_mapping: Polar_Stereographic origname: misfit_scaled_rms fullnamepath: /misfit_scaled_rms |
| Polar_Stereographic: | 16 bit Integer standard_name: Polar_Stereographic grid_mapping_name: polar_stereographic straight_vertical_longitude_from_pole: 0.0000000000000000 latitude_of_projection_origin: -90.000000000000000 standard_parallel: -71.000000000000000 scale_factor_at_projection_origin: 1.0000000000000000 false_easting: 0.0000000000000000 false_northing: 0.0000000000000000 semi_major_axis: 6378.1369999999997 semi_minor_axis: 6356.7520000000004 inverse_flattening: 298.25722356300003 spatial_epsg: 3031 spatial_ref: PROJCS["WGS 84 / Antarctic Polar Stereographic",GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4326"]],PROJECTION["Polar_Stereographic"],PARAMETER["latitude_of_origin",-71],PARAMETER["central_meridian",0],PARAMETER["scale_factor",1],PARAMETER["false_easting",0],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","3031"]] crs_wkt: PROJCS["WGS 84 / Antarctic Polar Stereographic",GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4326"]],PROJECTION["Polar_Stereographic"],PARAMETER["latitude_of_origin",-71],PARAMETER["central_meridian",0],PARAMETER["scale_factor",1],PARAMETER["false_easting",0],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","3031"]] GeoTransform: -2670000.0000000000, 100.00000000000000, 0.0000000000000000, 2270000.0000000000, 0.0000000000000000, -100.00000000000000 origname: Polar_Stereographic fullnamepath: /Polar_Stereographic |
| quality_assessment_qa_granule_fail_reason: | Array of 32 bit Integers [quality_assessment_phony_dim_1 = 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. 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 [quality_assessment_phony_dim_1 = 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. flag_meanings: PASS FAIL flag_values: 0, 1 origname: qa_granule_pass_fail fullnamepath: /quality_assessment/qa_granule_pass_fail |
| ice_area: | Array of 32 bit Reals [y = 0..22700][x = 0..26700] _FillValue: 3.402823466e+38 units: meters^2 dimensions: y, x datatype: float32 coordinates: y x least_significant_digit: None description: Ice-covered area of each grid cell, accounting for the area distortion in the polar-stereographic projections long_name: DEM grid ice-covered area source: 3.4 grid_mapping: Polar_Stereographic origname: ice_area fullnamepath: /ice_area |
| h_sigma: | Array of 32 bit Reals [y = 0..22700][x = 0..26700] _FillValue: 3.402823466e+38 units: meters dimensions: y, x datatype: float32 coordinates: y x least_significant_digit: 4 description: Uncertainty in the DEM surface height long_name: DEM uncertainty source: 4.1 grid_mapping: Polar_Stereographic origname: h_sigma fullnamepath: /h_sigma |
| data_count: | Array of 32 bit Reals [y = 0..22700][x = 0..26700] _FillValue: 3.402823466e+38 units: counts dimensions: y, x datatype: float32 coordinates: y x least_significant_digit: None description: Weighted number of data contributing to each node in the DEM. long_name: DEM data count source: 5.2.4.4 grid_mapping: Polar_Stereographic origname: data_count fullnamepath: /data_count |
| h: | Array of 32 bit Reals [y = 0..22700][x = 0..26700] _FillValue: 3.402823466e+38 units: meters dimensions: y, x datatype: float32 coordinates: y x least_significant_digit: 4 description: DEM surface height, referenced to WGS84 long_name: DEM height source: 3.2 grid_mapping: Polar_Stereographic origname: h fullnamepath: /h |
| orbit_info_bounding_polygon_dim1: | Array of 32 bit Integers [orbit_info_bounding_polygon_dim1 = 0..53] long_name: Polygon vertex count units: 1 source: model contentType: modelResult description: Polygon extent vertex count origname: bounding_polygon_dim1 fullnamepath: /orbit_info/bounding_polygon_dim1 |
| quality_assessment_phony_dim_1: | Array of 32 bit Reals [quality_assessment_phony_dim_1 = 0..0] |
| tile_stats_x: | Array of 64 bit Reals [tile_stats_x = 0..65] _FillValue: 1.7976931348623157e+308 standard_name: projection_x_coordinate coordinates: tile_stats/x units: meters dimensions: x datatype: float64 description: tile-center x-coordinate, in projected coordinates long_name: Polar stereographic x source: 4.1.2.1 grid_mapping: Polar_Stereographic origname: x fullnamepath: /tile_stats/x |
| tile_stats_y: | Array of 64 bit Reals [tile_stats_y = 0..56] _FillValue: 1.7976931348623157e+308 standard_name: projection_y_coordinate coordinates: tile_stats/y units: meters dimensions: y datatype: float64 description: tile-center y-coordinate, in projected coordinates long_name: Polar stereographic y source: 4.1.2.1 grid_mapping: Polar_Stereographic origname: y fullnamepath: /tile_stats/y |
| x: | Array of 64 bit Reals [x = 0..26700] _FillValue: 1.7976931348623157e+308 units: meters dimensions: x datatype: float64 coordinates: x least_significant_digit: None description: x coordinate of the DEM cell centers, in projected coordinates long_name: Polar stereographic x source: 3.2 standard_name: projection_x_coordinate origname: x fullnamepath: /x |
| y: | Array of 64 bit Reals [y = 0..22700] _FillValue: 1.7976931348623157e+308 units: meters dimensions: y datatype: float64 coordinates: y least_significant_digit: None description: y coordinate of the DEM cell centers, in projected coordinates long_name: Polar stereographic y source: 3.2 standard_name: projection_y_coordinate origname: y fullnamepath: /y |
| FakeDim0: | Array of 32 bit Integers [FakeDim0 = 0..0] units: level |