Dataset Information

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


Variables in this Dataset

/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