DERIVATION OF VELOCITY OF THE POTSDAM GLACIER, EAST ANTARCTICA USING SAR INTERFEROMETRY

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Research areas:
Year:
2017
Type of Publication:
Article
Keywords:
InSAR, Glacier Velocity, Sentinel, Potsdam Glacier
Authors:
Shridhar D. Jawak, Alvarinho J. Luis Prashant H. Pandit
Abstract:
The Synthetic Aperture Radar Interferometry,InSAR is a robust method for monitoring Earth's surface mainly to measure its topography and deformation. It is a widely used technique in multidisciplinary applications. By using two SAR images interferogram are generated which shows phase as well as the amplitude information. The phase information from two and more interferogram further helps to extract information about height and displacement of the surface. We used this technique to derived glacier velocity for Potsdam glacier which is located south of the Schirmacher oasis and north of Wohlthat Massif, east Antarctica using Sentinel-1 Single Look Complex images captured in Interferometric Wide mode. For velocity estimation, Persistent Scatterer interferometry method has been applied. This method uses time coherent of permanent pixel of master images and correlates to same pixel of the slave image to get displacement. C-band sensor of European Space Agency, Sentinel-1A and 1B data were used in this study. Estimated average velocity is around 0.12 m per day which varies annually from 30 m to 60 m. The velocity varies from higher elevation to lower elevation. The study suggest that, at higher altitude toward the south west of the glacier flow is at 30-35 m annually and at lower altitude it measured as 55 m to 60 m.
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