ICESat Elevations in Antarctica Along the 2007-09 Norway-USA Traverse: Validation With Ground-Based GPS

被引：11

作者：

Kohler, Jack ^{[1
]}

Neumann, Thomas A. ^{[2
]}

Robbins, John W. ^{[2
]}

Tronstad, Stein ^{[3
]}

Melland, Gudmund ^{[3
,4
]}

机构：

[1] Norwegian Polar Res Inst, Res Dept, N-9296 Tromso, Norway

[2] NASA Goddard Space Flight Ctr, Cryospher Sci Branch, Greenbelt, MD 20770 USA

[3] Norwegian Polar Res Inst, Environm Management Dept, N-9296 Tromso, Norway

[4] TerraTec AS, N-7434 Trondheim, Norway

来源：

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING | 2013年 / 51卷 / 03期

基金：

美国国家科学基金会;

关键词：

Altimetry; ice; laser measurements; radar altimetry; remote sensing; SATELLITE RADAR; VERIFICATION; PERFORMANCE; PRECISION; ACCURACY; SYSTEM;

D O I：

10.1109/TGRS.2012.2207963

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

The 2007-09 Norway-USA Traverse of East Antarctica collected dual-frequency Global Positioning System (GPS) data at 5-s intervals on two of the traverse vehicles. The traverse covered 2400 km from the coast to the vicinity of the Amundsen-Scott South Pole Station in 2007-08, and a 2600 km route from the South Pole to the coast in 2008-09. Side traverses were also conducted in 2008-09, for a total of over 10 000 km of GPS data between the two vehicles. We use precise point positioning to post-process our single receiver kinematic GPS data. Analysis of data obtained while the vehicles were stationary shows individual solutions are accurate to ca. 1 cm horizontally and 3 cm vertically. We compare our GPS elevations with those determined by the National Aeronautics and Space Administration's Ice, Cloud, and Land Elevation Satellite (ICESat), a space-based altimeter designed to measure ice elevation. ICESat accuracy is evaluated by cross-over analysis; mean differences calculated between dh/dt-corrected ICESat data and GPS-derived surface elevations for two vehicles and two traverse seasons range from -12 to -2 cm, within ICESat's stated goal of +/- 15 cm, while 1-sigma values of the same data imply that ICESat's precision is ca. 15.8 cm.

引用

页码：1578 / 1587

页数：10

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