期刊
GEOCARTO INTERNATIONAL
卷 37, 期 25, 页码 10130-10151出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/10106049.2022.2032391
关键词
Glacier movement; Differential SAR Interferometry; 2-pass and 3-pass interferometry; DEM; coherence and interferogram
类别
资金
- BRICS Science, Technology and Innovation Framework Programme (BRICS STI FP) from the Department of Science and Technology, India [DST/IMRCD/BRICS/PilotCall1/Col-GaSS/2017 (G)]
- Russian Foundation for Basic Research, Russia [17-55-80107]
- Brazilian National Council for Scientific and Technological Development, Brazil [441810/2016-0]
Glacier velocity is a crucial parameter for glacier dynamics, and the 3-pass DInSAR technique using Sentinel-1A/1B satellite is effective in mapping glacier flow velocities with high-resolution and detailed information.
Glacier velocity is an important parameter to characterize glacier dynamics and to derive ice thickness and mass balance. The 2-pass/3-pass Differential Synthetic Aperture Radar Interferometry (DInSAR) techniques are advantageous in estimating glacier movements. However, the 2-pass DInSAR requires an external Digital Elevation Model (DEM), whereas the 3-pass DInSAR does not. The 3-pass DInSAR technique is adopted with Sentinel-1A/1B to map the Svalbard glacier flow velocities. Furthermore, the effect of glacier surface elevation change on the 2-pass DInSAR results were revealed by comparing glacier velocity with the two time period topographic information. The coherence indicates that Sentinel-1A/1B has a high potential to infer operational glacier velocity using the 3-pass DInSAR method with an average atmospheric uncertainty of 0.24 cm/day over the studied region. The precision of the 3-pass DInSAR is analyzed by comparing 2-pass derived line-of-sight (LOS) velocity on the same dates. The 3-pass DInSAR achieves high-resolution and detailed information.
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