ICESat Antarctic elevation data: Preliminary precision and accuracy assessment

Autor:	John Dimarzio, V. P. Suchdeo, Helen A. Fricker, Bob E. Schutz, Anita C. Brenner, Christopher A. Shuman, H. J. Zwally
Rok vydání:	2006
Předmět:	Accuracy and precision Ice cloud media_common.quotation_subject Elevation Antarctic ice sheet Geodesy Latitude Geophysics Sky General Earth and Planetary Sciences Satellite Altimeter Geology Remote sensing media_common
Zdroj:	Geophysical Research Letters. 33
ISSN:	0094-8276
DOI:	10.1029/2005gl025227
Popis:	[1] 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.
Databáze:	OpenAIRE
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