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Bara Shigri and Chhota Shigri glacier velocity estimation in western Himalaya using Sentinel-1 SAR data

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In this article, we have presented surface velocity estimation of Chhota Shigri (CS) and Bara Shigri (BS) glaciers in the Himalaya using C-band synthetic aperture radar (SAR) data from Sentinel-1 (S-1). Repeat-pass SAR image subpixel offset tracking has been used to generate velocity vectors from yearly and seasonal S-1 data sets. SAR offset tracking on the basis of maximum intensity correlation provided the two-dimensional (2-D) movement of the both CS and BS glaciers of Chandra valley in western Himalaya. Movement of the glacier has been observed in the terminus to ablation zone during 2014–2018. S-1-derived movement is compared with in-situ measurement over CS glacier, and it has shown approximately 25% deviation during 2015–2016 with respect to field measurements from 2009 to 2010. Similar to previous decade observations, S-1 offset tracking movement results of recent three years have shown a decreasing trend.
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Document Type: Research Article

Affiliations: 1: School of Electronics Engineering, VIT University Vellore, Vellore, India 2: Earth Observation Group, Northern Research Institute (NORUT), Tromsø, Norway

Publication date: August 3, 2019

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