ICESat Antarctic elevation data: Preliminary precision and accuracy assessment

被引：135

作者：

Shuman, CA

Zwally, HJ

Schutz, BE

Brenner, AC

DiMarzio, JP

Suchdeo, VP

Fricker, HA

机构：

[1] NASA, Goddard Space Flight Ctr, Cryospher Sci Branch, Greenbelt, MD 20771 USA

[2] Univ Texas, Ctr Space Res, Austin, TX 78759 USA

[3] NASA, Goddard Space Flight Ctr, SSAI, Lanham, MD 20706 USA

[4] SGT Inc, NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[5] NVI Inc, NASA, Goddard Space Flight Ctr, Greenbelt, MD USA

[6] Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2006年 / 33卷 / 07期

关键词：

D O I：

10.1029/2005GL025227

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Since 'first light' on February 20th, 2003, NASA's Ice, Cloud, and land Elevation Satellite (ICESat) has derived surface elevations from similar to 86 degrees N to 86 degrees 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 similar to 2.1 cm and the relative accuracy of ICESat elevations is +/- 14 cm based on crossover differences.

引用

页数：4

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