DocumentCode :
826770
Title :
Measurement of glacier geophysical properties from InSAR wrapped phase
Author :
Forster, Richard R. ; Jezek, Kenneth C. ; Koenig, Lora ; Deeb, Elias
Author_Institution :
Dept. of Geogr., Utah Univ., Salt Lake City, UT, USA
Volume :
41
Issue :
11
fYear :
2003
Firstpage :
2595
Lastpage :
2604
Abstract :
A method is presented for calculating longitudinal glacier strain rates directly from the wrapped phase of an interferometric synthetic aperture radar (InSAR) interferogram assuming the ice flow path is known. This technique enables strain rates to be calculated for scenes lacking any velocity control points or areas within a scene where the phase is not continuously unwrappable from a velocity control point. The contributions to the error in the estimate of the strain rate are evaluated, and recommendations for appropriate SAR and InSAR parameters are presented. An example using Radarsat-1 InSAR data of an East Antarctic ice stream demonstrates the technique for calculating longitudinal strain rate profiles and estimating tensile strength of ice (186-215 kPa) from locations of crevasse initiation. The strain rate error was found to be 17% corresponding to a tensile strength of ice error of 5.3%.
Keywords :
glaciology; hydrological techniques; radar imaging; radiowave interferometry; spaceborne radar; synthetic aperture radar; East Antarctic ice stream; InSAR wrapped phase; SAR; crevasse initiation; glacier geophysical properties; interferometric synthetic aperture radar interferogram; longitudinal glacier strain rates; tensile strength; wrapped phase; Antarctica; Capacitive sensors; Geophysical measurements; Ice; Layout; Phase measurement; Remote sensing; Sea measurements; Synthetic aperture radar interferometry; Velocity control;
fLanguage :
English
Journal_Title :
Geoscience and Remote Sensing, IEEE Transactions on
Publisher :
ieee
ISSN :
0196-2892
Type :
jour
DOI :
10.1109/TGRS.2003.815413
Filename :
1245247
Link To Document :
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