| Conventions: | CF-1.6 |
| contributor_name: | Thomas E Neumann (thomas.neumann@nasa.gov), Thorsten Markus (thorsten.markus@nasa.gov), Suneel Bhardwaj (suneel.bhardwaj@nasa.gov) David W Hancock III (david.w.hancock@nasa.gov) |
| contributor_role: | Instrument Engineer, Investigator, Principle Investigator, Data Producer, Data Producer |
| date_type: | UTC |
| description: | The data set (ATL07) contains along-track heights for sea ice and open water leads (at varying length scales) relative to the WGS84 ellipsoid (ITRF2014 reference frame) after adjustment for geoidal and tidal variations, and inverted barometer effects. Heig |
| featureType: | trajectory |
| geospatial_lat_units: | degrees_north |
| geospatial_lon_units: | degrees_east |
| granule_type: | ATL07 |
| identifier_product_doi_authority: | http://dx.doi.org |
| level: | L3A |
| 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 |
| short_name: | ATL07 |
| spatial_coverage_type: | Horizontal |
| standard_name_vocabulary: | CF-1.6 |
| time_type: | CCSDS UTC-A |
| title: | SET_BY_META |
| date_created: | 2020-05-29T14:35:54.000000Z |
| hdfversion: | HDF5 1.10.3 |
| history: | 2020-05-29T14:35:54.000000Z;2bed11f8-37e3-3547-bf60-9d7af1919f0d;Created by PGE atlas_l3a_si Version 4.3.2 |
| identifier_file_uuid: | 2bed11f8-37e3-3547-bf60-9d7af1919f0d |
| identifier_product_format_version: | 4.3 |
| time_coverage_duration: | 5658. |
| time_coverage_end: | 2018-10-14T01:38:05.000000Z |
| time_coverage_start: | 2018-10-14T00:03:47.000000Z |
| geospatial_lat_min: | 68.916474823665695 |
| geospatial_lon_min: | 63.30432580191718 |
| geospatial_lat_max: | 88.043374802950964 |
| geospatial_lon_max: | -136.62047583959989 |
| 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/ |
| identifier_product_type: | ATL07 |
| identifier_product_doi: | doi:10.5067/ATLAS/ATL07.003 |
| institution: | National Aeronautics and Space Administration (NASA) |
| creator_name: | GSFC I-SIPS > ICESat-2 Science Investigator-led Processing System |
| summary: | The purpose of ATL07 is to provide along-track sea ice heights and associated statistics. |
| 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: | 2A |
| 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 |
| /gt1r/sea_ice_segments/height_segment_id: | Array of 32 bit Integers [delta_time = 0..280132] contentType: referenceInformation coordinates: delta_time latitude longitude description: Identifier of each height segment long_name: Identifier of each height segment source: ATBD, section 5.2 units: 1 |
| /gt1r/sea_ice_segments/delta_time: | Array of 64 bit Reals [delta_time = 0..280132] contentType: physicalMeasurement coordinates: latitude longitude description: Number of GPS seconds since the ATLAS SDP epoch. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. long_name: Elapsed GPS seconds source: telemetry standard_name: time units: seconds since 2018-01-01 |
| /gt2r/sea_ice_segments/seg_dist_x: | Array of 64 bit Reals [delta_time = 0..225002] contentType: referenceInformation coordinates: delta_time latitude longitude description: Along-track distance from the equator crossing to the segment center. long_name: Along track distance source: Sea Ice ATBD units: meters |
| /gt2r/sea_ice_segments/delta_time: | Array of 64 bit Reals [delta_time = 0..225002] contentType: physicalMeasurement coordinates: latitude longitude description: Number of GPS seconds since the ATLAS SDP epoch. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. long_name: Elapsed GPS seconds source: telemetry standard_name: time units: seconds since 2018-01-01 |
| /gt3l/sea_ice_segments/geophysical/height_segment_t2m: | Array of 32 bit Reals [delta_time = 0..274700] _FillValue: 3.402823466e+38 contentType: referenceInformation coordinates: ../delta_time ../latitude ../longitude description: Temperature at 2m above the displacement height (K) long_name: temperature_at_2m source: ATL09 standard_name: temperature units: K |
| /gt3l/sea_ice_segments/geophysical/height_segment_ocean: | Array of 32 bit Reals [delta_time = 0..274700] _FillValue: 3.402823466e+38 contentType: referenceInformation coordinates: ../delta_time ../latitude ../longitude description: Ocean Tides including diurnal and semi-diurnal (harmonic analysis), and longer period tides (dynamic and self-consistent equilibrium) long_name: Ocean Tide source: Sea Ice ATBD units: meters |
| /gt3l/sea_ice_segments/geophysical/delta_time: | Array of 64 bit Reals [delta_time = 0..274700] contentType: physicalMeasurement coordinates: latitude longitude description: Number of GPS seconds since the ATLAS SDP epoch. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. long_name: Elapsed GPS seconds source: telemetry standard_name: time units: seconds since 2018-01-01 |