NSIDC-0304 John P. DiMarzio 20070621 Boulder, Colorado USA NSIDC: National Snow and Ice Data Center http://nsidc.org/data/nsidc-0304.html The Geoscience Laser Altimeter System (GLAS) instrument on the Ice, Cloud, and land Elevation Satellite (ICESat) provides global measurements of elevation, and repeats measurements along nearly-identical tracks; its primary mission is to measure changes in ice volume (mass balance) over time. This digital elevation model (DEM) of Antarctica is derived from GLAS/ICESat laser altimetry profile data and provides new surface elevation grids of the ice sheets and coastal areas, with greater latitudinal extent and fewer slope-related effects than radar altimetry. This DEM is generated from the first seven operational periods (from February 2003 through June 2005) of the GLAS instrument. It is provided on polar stereographic grids at 500 m grid spacing. The grid covers all of Antarctica north of 86° S. Elevations are reported as centimeters above the datums, relative to both the WGS 84 ellipsoid and the EGM96 geoid, in two separate elevation data files. A data quality map of the interpolation distance is distributed in addition to the elevation data. ENVI header files are also provided. The data are in 4-byte (long) signed integer binary files (big endian byte order) and are available via FTP. scientific research John P. DiMarzio 20070621 Boulder, Colorado USA NSIDC: National Snow and Ice Data Center http://nsidc.org/data/docs/daac/nsidc0304_0305_glas_dems.gd.html 20030201 20050630 publication date Complete Unknown -180 180 -63 -86 NASA Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Glacier Elevation/Ice Sheet Elevation EARTH SCIENCE > Terrestrial Hydrosphere > Glaciers/Ice Sheets > Glacier Elevation/Ice Sheet Elevation NASA Global Change Master Directory (GCMD) Project Keywords ICESAT > Ice, Cloud and Land Elevation Satellite NASA Global Change Master Directory (GCMD) Instrument Keywords GLAS > Geoscience Laser Altimeter System NASA Global Change Master Directory (GCMD) Platform Keywords ICESAT > Ice, Cloud and Land Elevation Satellite ISO 19115 Topic Categories elevation None Altimetry Antarctica Antarctic Ice Sheet Dem Digital Elevation Model Elevation Ice Sheet Ice Sheet Elevation Polar Polar Stereographic South Pole NASA Global Change Master Directory (GCMD) Location Keywords Continent > Antarctica Ice, Cloud and Land Elevation Satellite ICESAT Geoscience Laser Altimeter System GLAS 2 NASA Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Glacier Elevation/Ice Sheet Elevation NASA Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > Terrestrial Hydrosphere > Glaciers/Ice Sheets > Glacier Elevation/Ice Sheet Elevation None None NSIDC User Services National Snow and Ice Data Center mailing

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Boulder CO 80309-0449 USA 1 303 492-6199 1 303 492-2468 nsidc@nsidc.org NSIDC-0304 NSIDC cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NSIDC makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty. Binary ftp://sidads.colorado.edu/pub/DATASETS/DEM/nsidc0304_icesat_antarctic_dem None 20120828 20120828 NSIDC User Services National Snow and Ice Data Center mailing

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Boulder CO 80309-0449 USA 1 303 492-6199 1 303 492-2468 nsidc@nsidc.org FGDC Content Standard for Digital Geospatial Metadata: Extensions for Remote Sensing Metadata FGDC-STD-012-2002