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Accuracy of satellite altimeter elevations over the Greenland ice sheet (1995)

Ekholm, Simon ; Forsberg, Rene ; Brozena, John M.

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Publication Date: 2011-08-24

Description: The accuracy of Geosat satellite altimetry over the Greenland ice sheet is evaluated by comparing the measured heights to radar elevations from the airborne Greenland Aerogeophysics Project. At the center of the ice sheet where the ice surface is nearly level, surface comparisons show a fit at the 1 to 3 m level as expected, but even at moderately sloping ice regions (0.3 deg-0.6 deg), satellite altimetry mean errors in the range of 10 to 35 m are observed. These errors are found for slope-corrected and waveform-retracked data, so most previous accuracy estimates of current satellite altimetry ice sheet elevations in regions of slopping or undulating ice appear to be too optimistic.

Keywords: GEOPHYSICS

Type: Journal of Geophysical Research (ISSN 0148-0227); 100; C2; p. 2687-2696

Format: text

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