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Estimation of the Surface Velocity Field of the Aletsch Glacier Using Multi-Baseline Airborne SAR Interferometry

Prats, Pau and Scheiber, Rolf and Reigber, Andreas and Andres, Christian and Horn, Ralf (2009) Estimation of the Surface Velocity Field of the Aletsch Glacier Using Multi-Baseline Airborne SAR Interferometry. IEEE Transactions on Geoscience and Remote Sensing, 47 (2), pp. 419-430. IEEE. DOI: 10.1109/TGRS.2008.2004277.

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Official URL: http://www.grss-ieee.org/menu.taf?menu=publications&detail=tgars

Abstract

This paper presents a methodology to process airborne interferometric SAR data to measure surface velocity fields of temperate glaciers, and applies it to data acquired over the Aletsch glacier. The first part of the paper deals with the main limitation in airborne interferometric SAR to retrieve reliable interferometric products, namely the existence of the so-called residual motion errors: inaccuracies in the order of a few centimeters in the navigation system. An extended multi-squint approach is proposed for their estimation in the case of non-stationary scenes. The second part of the paper expounds an efficient methodology to derive surface velocity fields with airborne systems, where the line-of-sight displacement is estimated using differential interferometry, and the along-track component by estimating the azimuth coregistration offsets. The necessary steps to finally obtain the 3D surface velocity field are also presented, as well as the possibility to combine different acquisition geometries. Airborne interferometric SAR data acquired by the Experimental SAR system of DLR over the Aletsch glacier, located in the Swiss Alps, are used to evaluate the performance of the proposed approach. The motion of the corner reflectors deployed in the scene is retrieved with an accuracy between 1-5 cm/day using L-band data.

Document Type:Article
Additional Information:�©2009 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE
Title:Estimation of the Surface Velocity Field of the Aletsch Glacier Using Multi-Baseline Airborne SAR Interferometry
Authors:
AuthorsInstitution or Email of Authors
Prats, PauUNSPECIFIED
Scheiber, RolfUNSPECIFIED
Reigber, AndreasUNSPECIFIED
Andres, ChristianUNSPECIFIED
Horn, RalfUNSPECIFIED
Date:February 2009
Journal or Publication Title:IEEE Transactions on Geoscience and Remote Sensing
Refereed publication:Yes
In Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:47
DOI:10.1109/TGRS.2008.2004277
Page Range:pp. 419-430
Editors:
EditorsEmail
IEEE, UNSPECIFIED
Publisher:IEEE
Status:Published
Keywords:cryosphere, differential SAR interferometry (DInSAR), synthetic aperture radar (SAR), SAR interferometry,
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben Flugzeug-SAR (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute
Microwaves and Radar Institute > SAR Technology
Deposited By: Dr. Pau Prats
Deposited On:23 Mar 2009
Last Modified:12 Dec 2013 20:32

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