The grid covers all of Greenland south of 83° N. It is provided on polar stereographic grids at 1 km grid spacing. This DEM is generated from the first seven operational periods (from February 2003 through June 2005) of the GLAS instrument. This digital elevation model (DEM) of Greenland 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. 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.
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