ICESat Antarctic elevation data: Preliminary precision and accuracy assessment

Details ICESat Antarctic elevation data: Preliminary precision and accuracy assessment ICESat Antarctic elevation data: Preliminary precision and accuracy assessment

Apr 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3307501s&link_type=abstract

Geophysical Research Letters, Volume 33, Issue 7, CiteID L07501

Physics

13

Cryosphere: Ice Sheets, Cryosphere: Remote Sensing, Cryosphere: Engineering, Cryosphere: Glaciology (1621, 1827, 1863), Global Change: Earth System Modeling (1225)

Scientific paper

Since `first light' on February 20th, 2003, NASA's Ice, Cloud, and land Elevation Satellite (ICESat) has derived surface elevations from ~86°N to 86°S latitude. These unique altimetry data have been acquired in a series of observation periods in repeated track patterns using all three Geoscience Laser Altimeter System (GLAS) lasers. Here, we focus on Antarctic ice sheet elevation data that were obtained in 2003-2004. We present preliminary precision and accuracy assessments of selected elevation data, and discuss factors impacting elevation change detection. We show that for low slope and clear sky conditions, the precision of GLA12 Laser 2a, Release 21 data is ~2.1 cm and the relative accuracy of ICESat elevations is +/-14 cm based on crossover differences.

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