SAR interferometry for DEM generation and movemnet of Indian glaciers

Two famous glaciers viz. Gangotri and Siachen were studied for DEM generation and movement usiny ERS-1&2 tandem data. While surrounding areas along the glaciers showed more decorrelation, glacier area showed a very good correlation between two image acquisitions. Contours obtained using ERS-1&am...

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Bibliographic Details
Main Authors: RAO, YS, VENKATARAMAN, G, RAO, KS, SNEHMANI
Format: Report
Language:English
Published: IEEE 2004
Subjects:
Ice-Sheet Motion
Radar Interferometry
Sar Interferometry
Dem
Movement
Glaciers
Indian
Ice Sheet
Online Access:http://dspace.library.iitb.ac.in/xmlui/handle/10054/16073
http://hdl.handle.net/100/2664
Description
Summary:Two famous glaciers viz. Gangotri and Siachen were studied for DEM generation and movement usiny ERS-1&2 tandem data. While surrounding areas along the glaciers showed more decorrelation, glacier area showed a very good correlation between two image acquisitions. Contours obtained using ERS-1&2 SAR tandem data closely match with topographic maps of the area. Two-pass differential method was used along with SRTM DEM to study the movement of the glaciers. According to the differential interferogram over Gangotri, 3 fringes equivalent to 8.4 em displacement in the radar look direction were observed, whereas for Siachen the fringes were about 8 which is equivalent to. 22 cm. The estimated DEMs and movements are to be verified using GPS measurements.

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