The Ice, Cloud, and Land Elevation Satellite-2 mission: A global geolocated photon product derived from the Advanced Topographic Laser Altimeter System

REMOTE SENSING OF ENVIRONMENT

卷:233

Article

Neumann, Thomas A.¹  Martino, Anthony J.¹  Markus, Thorsten¹  Bae, Sungkoo²  Bock, Megan R.^1,3  Brenner, Anita C.^1,4  Brunt, Kelly M.^1,5  Cavanaugh, John¹  Fernandes, Stanley T.⁶  Hancock, David W.^1,7  Harbeck, Kaitlin^1,7  Lee, Jeffrey^1,7  Kurtz, Nathan T.¹  Luers, Philip J.¹  Luthcke, Scott B.¹  Magruder, Lori²  Pennington, Teresa A.^1,7  Ramos-Izquierdo, Luis¹  Rebold, Timothy^1,8  Skoo, Jonah⁶  Thomas, Taylor C.^1,8 

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

[2] Univ Texas Austin, Appl Res Labs, Austin, TX 78713 USA

[3] ADNET Syst Inc, Lanham, MD USA

[4] Sigma Space Corp, Lanham, MD USA

[5] Univ Maryland, College Pk, MD 20742 USA

[6] Northrop Grumman Innovat Syst, Gilbert, AZ USA

[7] KBR, Greenbelt, MD USA

[8] Emergent Space Technol, Laurel, MD USA

关键词: ICESat-2;    Laser altimeter;    Remote sensing;    Altimetry;    Cryosphere;    Ice sheets;    Sea ice;    Photon counting;   

DOI  :  10.1016/j.rse.2019.111325

来源: Elsevier

【 摘 要 】

The Ice, Cloud, and land Elevation Satellite - 2 (ICESat-2) observatory was launched on 15 September 2018 to measure ice sheet and glacier elevation change, sea ice freeboard, and enable the determination of the heights of Earth's forests. ICESat-2's laser altimeter, the Advanced Topographic Laser Altimeter System (ATLAS) uses green (532 nm) laser light and single-photon sensitive detection to measure time of flight and subsequently surface height along each of its six beams. In this paper, we describe the major components of ATLAS, including the transmitter, the receiver and the components of the timing system. We present the major components of the ICESat-2 observatory, including the Global Positioning System, star trackers and inertial measurement unit. The ICESat-2 Level 1B data product (ATL02) provides the precise photon round-trip time of flight, among other data. The ICESat-2 Level 2A data product (ATL03) combines the photon times of flight with the observatory position and attitude to determine the geodetic location (i.e. the latitude, longitude and height) of the ground bounce point of photons detected by ATLAS. The ATL03 data product is used by higher-level (Level 3A) surface-specific data products to determine glacier and ice sheet height, sea ice freeboard, vegetation canopy height, ocean surface topography, and inland water body height.

【 授权许可】

Free