Paper Info
Title
Assessment of CryoSat-2 Baseline-D Height Product by GNSS and ICESat-2 in Lambert-Amery System, East Antarctica
Abstract
CryoSat-2 repeatedly collects dense radar altimetry footprints covering high latitudes of the polar ice sheets for over ten years. The Baseline-D height product of CryoSat-2 was recently upgraded and released in 2019. Based on the internal or locally external evaluation of CryoSat-2 Baseline-D ice heights, we extended the validation both heterogeneously and spatially to accomplish a comprehensive assessment. First, reliable ice surface global navigation satellite system point solutions along the 36th Chinese National Antarctic Research Expedition traverse functioned as a height reference for comparison with the CryoSat-2 SAR synthetic aperture radar interferometric mode (SIN) data. Secondly, the Land Ice Along-Track Height product over Lambert-Amery system (LAS) from ice, cloud, and land elevation satellite 2 (ICESat-2), was also applied to validate CryoSat-2 SIN and low-resolution mode (LRM) data. As the results indicate, the SIN height accuracy is evaluated to be -1.68 m +/- 2.35 m (slope < 0.65 degrees) along the traverse and -0.96 +/- 1.95 m (slope < 0.95 degrees and roughness < 3 m) over the margin of LAS. The LRM height accuracy is evaluated to be -0.13 +/- 0.46 m (slope < 0.1 degrees & roughness < 1 m) over the interior of LAS. The standard deviation of the height differences degrades linearly against the limited growth of the terrain slope/roughness at the confidence level of 99%. It is worth noting that the spatially heterogeneous pattern of height differences is correlated with surface topography variations. This article should imply the potential to improve the estimation of mass balance and its uncertainty of polar ice sheets based on radar altimetry data.
Year
DOI
Venue
2022
10.1109/JSTARS.2022.3156929
IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING
Keywords
DocType
Volume
Global navigation satellite system, Ice, Antarctica, Distributed databases, Spaceborne radar, Satellites, Surface topography, Assessment, Baseline-D, Cryosat-2, global navigation satellite system (GNSS), ice, cloud, and land elevation satellite 2 (ICESat-2), Lambert-Amery system (LAS)
Journal
15
ISSN
Citations 
PageRank 
1939-1404
0
0.34
References 
Authors
0
6
Name
Order
Citations
PageRank
Gang Hai100.34
Yuan Cheng200.34
Huan Xie38823.05
Tong Hao413.07
Gang Qiao500.34
Rongxing Li614114.56