Land ice height-retrieval algorithm for NASA's ICESat-2 photon-counting laser altimeter

REMOTE SENSING OF ENVIRONMENT

卷:233

Article

Smith, Benjamin¹  Fricker, Helen A.²  Holschuh, Nicholas³  Gardner, Alex S.⁴  Adusumilli, Susheel²  Brunt, Kelly M.^5,6  Csatho, Beata⁷  Harbeck, Kaitlin^5,8  Huth, Alex^1,3  Neumann, Thomas⁵  Nilsson, Johan⁴  Siegfried, Matthew R.⁹ 

[1] Univ Washington, Appl Phys Lab, Polar Sci Ctr, Seattle, WA 98195 USA

[2] Univ Calif San Diego, Scripps Inst Oceanog, San Diego, CA 92103 USA

[3] Univ Washington, Dept Earth & Space Sci, Seattle, WA 98195 USA

[4] CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA

[5] NASA, Goddard Space Flight Ctr, Cryospher Sci Lab, Greenbelt, MD 20771 USA

[6] Univ Maryland, Earth Syst Sci Interdisciplinary Ctr, College Pk, MD 20740 USA

[7] SUNY Buffalo, Dept Geol Sci, Buffalo, NY 14260 USA

[8] SGT Inc, KBR Wyle, Greenbelt, MD USA

[9] Colorado Sch Mines, Dept Geophys, Golden, CO 80401 USA

关键词: ICESat-2;    Laser altimeter;    Ice sheets;    Glaciers;    Land ice;    Cryosphere;   

DOI  :  10.1016/j.rse.2019.111352

来源: Elsevier

【 摘 要 】

The Ice, Cloud, and land Elevation Satellite-2 (ICESat-2) and its sole scientific instrument, the Advanced Topographic Laser Altimeter System (ATLAS), was launched on 15 September 2018 with a primary goal of measuring changes in the surface of the Earth's land ice (glaciers and ice sheets). ATLAS is a photon-counting laser altimeter, which records the transit time of individual photons in order to reconstruct surface height along track. The ground-track pattern repeats every 91 days such that changes in ice sheet surface height can be estimated through time. In this paper, we describe the set of algorithms that have been developed for ICESat-2 to retrieve ice sheet surface height from the geolocated photons for the Land Ice Along-Track Height Product (ATL06), and demonstrate their output and performance using a synthetic dataset over various land-ice surfaces and under different cloud conditions. We show that the ATL06 algorithm is expected to perform at the level required to meet the ICESat-2 science objectives for land ice.

【 授权许可】

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