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Estimation of the Temporal Evolution of the Deformation Using Airborne Differential SAR Interferometry

Prats, Pau and Reigber, Andreas and Mallroqui, Jordi J. and Scheiber, Rolf and Moreira, Alberto (2008) Estimation of the Temporal Evolution of the Deformation Using Airborne Differential SAR Interferometry. IEEE Transactions on Geoscience and Remote Sensing, 46 (4), pp. 1065-1078. IEEE. DOI: 10.1109/TGRS.2008.915758.

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

Abstract

This paper presents airborne differential SAR interferometry results using a stack of 14 images, which were acquired by the Experimental SAR (E-SAR) system of the German Aerospace Center (DLR) during a time span of two and a half hours. An advanced differential technique is used to retrieve the error in the digital elevation model and the temporal evolution of the deformation for every coherent pixel in the image. The two main limitations in airborne SAR processing are analyzed, namely the existence of residual motion errors (inaccuracies in the navigation system in the order of 1-5cm), and the accommodation of the topography and the aperture dependence on motion errors during the processing. The coupling between them is also addressed, showing that the estimation of the differential residual motion error, i.e. baseline error, can be biased when using techniques based on the coregistration between interferometric looks. The SAR focusing chain to process the data is also presented, together with the modifications in the differential interferometry processor to deal with the remaining baseline error. The detected motion of a corner reflector and the measured deformation in several agricultural fields allows validating the proposed techniques.

Document Type:Article
Additional Information:©2008 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 Temporal Evolution of the Deformation Using Airborne Differential SAR Interferometry
Authors:
AuthorsInstitution or Email of Authors
Prats, PauUNSPECIFIED
Reigber, AndreasBerlin University of Technology
Mallroqui, Jordi J.Universitat Politecnica de Catalunya
Scheiber, RolfUNSPECIFIED
Moreira, AlbertoUNSPECIFIED
Date:April 2008
Journal or Publication Title:IEEE Transactions on Geoscience and Remote Sensing
Volume:46
DOI:10.1109/TGRS.2008.915758
Page Range:pp. 1065-1078
Publisher:IEEE
Status:Published
Keywords:differential interferometry, interferometry, motion compensation (MoCo), SAR processing, synthetic aperture radar (SAR)
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 > SAR Technology
Deposited By: Dr. Pau Prats
Deposited On:07 Apr 2008
Last Modified:12 Dec 2013 20:28

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