Retrieval of Svalbard ice flow velocities using Sentinel 1A/1B three-pass Differential SAR Interferometry. Issue 25 (13th December 2022)

• Record Type: Journal Article
• Authors: Nela, Bala Raju; Singh, Gulab; Mohanty, Shradha; Rajat, ; Arigony-Neto, Jorge; Glazovsky, Andrey F.
• Is Part Of: Geocarto international. Volume 37:Issue 25(2023)
• Page Start: 10130
• Page End: 10151
• Publication Date: 2022-12-13
• Subjects: Glacier movement -- Differential SAR Interferometry -- 2-pass and 3-pass interferometry -- DEM -- coherence and interferogram; Remote sensing -- Periodicals; Geographic information systems -- Periodicals; Geology -- Periodicals; Cartography -- Periodicals; 621.3678
• DOI: 10.1080/10106049.2022.2032391
• Languages: English
• ISSNs: 1010-6049

Abstract

Abstract: 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.