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Retrieval of phase history parameters from distributed scatterers in urban areas using very high resolution SAR data

Wang, Yuanyuan and Zhu, Xiao Xiang and Bamler, Richard (2012) Retrieval of phase history parameters from distributed scatterers in urban areas using very high resolution SAR data. ISPRS Journal of Photogrammetry and Remote Sensing, 73 (Innova), pp. 89-99. Elsevier. DOI: 10.1016/j.isprsjprs.2012.06.007.. ISSN 0924-2716.

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Official URL: http://www.sciencedirect.com/science/journal/09242716/73


In a recent contribution Ferretti and co-workers (Ferretti, A., Fumagalli, A., Novali, F., Prati, C., Rocca, F., Rucci, A., 2011. A new algorithm for processing interferometric data-stacks: SqueeSAR IEEE Transactions on Geoscience and Remote Sensing 49(9), pp. 3460�3470) have proposed the SqueeSAR method, a way to exploit temporally coherent distributed scatterers in coherent SAR data stacks. Elevation and deformation or subsidence estimates are obtained with accuracy similar as in the well known persistent scatterer interferometry (PSI). In this paper we propose an alternative approach and provide a first demonstration of the optimal estimation of distributed scatterers� phase histories in urban areas. Different to SqueeSAR, we derive phase histories for each distributed scatterer pixel rather than for groups of pixels. We use the Anderson�Darling statistical test to identify neighboring samples of the same distribution. Prior to covariance matrix estimation required for maximum likelihood estimation we apply a multi-resolution defringe technique. By using TerraSAR-X high resolution spotlight data, it is demonstrated that we are able to retrieve reliable phase histories and motion parameter estimates from distributed scatterers with signal-to-noise-ratio far below the common range.

Document Type:Article
Title:Retrieval of phase history parameters from distributed scatterers in urban areas using very high resolution SAR data
AuthorsInstitution or Email of Authors
Wang, Yuanyuanyuanyuan.wang@dlr.de
Zhu, Xiao Xiangxiao.zhu@dlr.de
Bamler, Richardrichard.bamler@dlr.de
Date:September 2012
Journal or Publication Title:ISPRS Journal of Photogrammetry and Remote Sensing
Refereed publication:Yes
In ISI Web of Science:Yes
Page Range:pp. 89-99
Soergel, Uwesoergel@ipi.uni-hannover.de
Vosselman, Georgevosselman@itc.nl
Keywords:Phase history, distributed scatterer, covariance matrix, SAR, PSI, TerraSAR-X
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:28 Nov 2012 10:38
Last Modified:12 Dec 2013 21:40

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