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Optimal estimation of distributed scatterer phase history parameters from meter-resolution SAR data

Wang, Yuanyuan and Zhu, Xiao Xiang and Bamler, Richard (2011) Optimal estimation of distributed scatterer phase history parameters from meter-resolution SAR data. IEEE. IGARSS 2011, 24-29 July 2011, Vancouver, Canada. ISBN 978-1-4577-1003-2 . ISSN 2153-6996

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Official URL: http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6049967


Measuring the long-term line-of-sight deformation using a multi-pass SAR data stack by standard persistent scatterer technique has been explored since the late 1990s. Researches have been continuously conducted on increasing the data coverage at non-PS-rich areas. The recently developed SqueeSARTM technique has validated the potential of extracting useful information from distributed scatterers. With the availability of high resolution TerraSAR-X spotlight data, this technique can benefit greatly from its higher data density and quality. This article presents an algorithm of parameter estimation at distributed scatterers by maximum likelihood estimator in high resolution TS-X spotlight data. Different to SqueeSAR, this article pays particular attention to the accurate covariance matrix estimation for phase history retrieval on each individual distributed scatterer. Solutions are presented for adaptive sample selection by a different statistical test (Anderson-Darling). An adaptive multi-resolution defringe algorithm is introduced to cope with the problem of accurate fringe removal and in turn accurate covariance matrix estimation. And finally maximum likelihood estimator was employed to estimate the model parameters by weighting each measurement according to its coherence. By combining both the persistent scatterers and distributed scatterers, the increase in the capable monitoring area is phenomenal.

Document Type:Conference or Workshop Item (Speech)
Title:Optimal estimation of distributed scatterer phase history parameters from meter-resolution SAR data
AuthorsInstitution or Email of Authors
Wang, YuanyuanTUM
Zhu, Xiao XiangTUM,DLR
Bamler, RichardTUM,DLR
Date:24 July 2011
Refereed publication:No
In ISI Web of Science:No
Page Range:pp. 3468-3471
Keywords:Interferometric SAR, distributed scatterers, covariance matrix, phase history
Event Title:IGARSS 2011
Event Location:Vancouver, Canada
Event Type:international Conference
Event Dates:24-29 July 2011
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben hochauflösende Fernerkundungsverfahren
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > SAR Signal Processing
Deposited By: Yuanyuan Wang
Deposited On:19 Aug 2011 09:56
Last Modified:08 May 2014 23:22

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