Digital SAR Mosaic and Elevation Map of the Greenland Ice Sheet, Version 1
Data set id:
NSIDC-0052
DOI: 10.5067/WZMPK0L17X7N
This is the most recent version of these data.

Overview

The Digital SAR Mosaic and Elevation Map of the Greenland Ice Sheet combines the most detailed synthetic aperture radar (SAR) image mosaic available with the best current digital elevation model. The mosaic image shows both the location of the ice edge and the distribution of melt-related 'scatterers' on the surface. These scatterers include ice lenses and complex layered structure in the percolation zone and bare ice of the ablation zone. Other melt-related features that can be seen include lake and surface meltwater stream channels at lower elevations, as well as ice-marginal lakes. This characterization of the ice sheet provides a reference against which future change can be measured. Changing conditions resulting from climatic variation should show up as changes in the ice margin and shifts in the hydrologic zones. It is hoped that the standard reference provided by this data set can facilitate activities aimed at change detection and promote other work aimed at understanding the processes operating on the ice sheet. The image data are derived from SAR image swaths acquired by the ERS-1 satellite during August of 1992. The mosaic was assembled at the Jet Propulsion Laboratory (JPL) and Goddard Space Flight Center (GSFC). Its component images are a copyrighted product of the European Space Agency. The mosaic, a value-added derived product, is available to individuals and non-profit organizations for research oriented purposes only. The Danish geodetic and cadastral agency Kort-og Matrikelstyrelsen (KMS) compiled the elevation data provided with the product from a number of sources, including field surveys, aerial photographs, and the ERS-1 radar altimeter.
Parameter(s):
GLACIER ELEVATION/ICE SHEET ELEVATIONGLACIER TOPOGRAPHY/ICE SHEET TOPOGRAPHYICE EDGESICE SHEETSRADAR BACKSCATTERRADAR CROSS-SECTIONRADAR IMAGERYRADAR REFLECTIVITYRETURN POWER
Platform(s):
ERS-1, GEOSAT
Sensor(s):
RADAR ALTIMETERS, SAR
Data Format(s):
Binary
Temporal Coverage:
2 August 1992 to 9 September 1992
1 January 1991 to 31 December 1995
Temporal Resolution:
Not Specified
Spatial Resolution:
  • 100 m
  • 2 km
  • 100 m
  • 2 km
Spatial Coverage:
N:
84
S:
60
E:
-10
W:
-73
Blue outlined yellow areas on the map below indicate the spatial coverage for this data set.

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How to Articles

These are directions for importing the grnlnd_dem_wgs84.dat (a flat binary with a 2-byte integer) into ArcGIS.
Data from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) can be accessed directly from our HTTPS file system. We provide basic command line Wget and curl instructions for HTTPS file system downloads below.