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Single-Look SAR Tomography as an Add-On to PSI for Improved Deformation Analysis in Urban Areas

Siddique, Muhammad Adnan und Wegmuller, Urs und Hajnsek, Irena und Frey, Othmar (2016) Single-Look SAR Tomography as an Add-On to PSI for Improved Deformation Analysis in Urban Areas. IEEE Transactions on Geoscience and Remote Sensing, 54 (10), 6119 -6137. IEEE - Institute of Electrical and Electronics Engineers. doi: 10.1109/TGRS.2016.2581261. ISSN 0196-2892.

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Offizielle URL: http://ieeexplore.ieee.org/document/7508450/

Kurzfassung

Persistent scatterer interferometry (PSI) is in operational use for spaceborne synthetic aperture radar (SAR)-based deformation analysis. A limitation inherently associated with PSI is that, by definition, a persistent scatterer (PS) is a single dominant scatterer. Therefore, pixels containing signal contributions from multiple scatterers, as in the case of a layover, are typically rejected in the PSI processing, which in turn limits deformation retrieval. SAR tomography has the ability to resolve layovers. This paper investigates the added value that can be achieved by operationally combining SAR tomography with a PSI approach toward the objective of improving deformation sampling in layover-affected urban areas. Different tomographic phase models are implemented and compared as regards their suitability in resolving layovers. Single-look beamforming-based tomographic inversion and a generalized likelihood ratio test (GLRT)-based detection strategy are used to detect single and double scatterers. The quantity of the detected scatterers is weighed against their quality as defined in terms of the phase deviation between the single-look complex (SLC) measurements and the tomographic model fit. The gain in deformation sampling that can be derived with tomography relative to a PSI-based analysis is quantitatively assessed, and alongside the quality of the scatterers obtained with tomography is compared with the quality of the PSs identified with a PSI approach. The experiments are performed on an interferometric stack of 50 TerraSAR-X stripmap images. The results obtained show that, although there is a tradeoff between the quantity and the quality of the detected scatterers, the tested SAR tomography approach leads to an improvement in deformation sampling in layover-affected areas.

elib-URL des Eintrags:https://elib.dlr.de/107968/
Dokumentart:Zeitschriftenbeitrag
Titel:Single-Look SAR Tomography as an Add-On to PSI for Improved Deformation Analysis in Urban Areas
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Siddique, Muhammad Adnaneth zürichNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Wegmuller, UrsgammaNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Hajnsek, Irenadlr/hr, eth zürichNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Frey, OthmarethNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:11 Juli 2016
Erschienen in:IEEE Transactions on Geoscience and Remote Sensing
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:54
DOI:10.1109/TGRS.2016.2581261
Seitenbereich:6119 -6137
Verlag:IEEE - Institute of Electrical and Electronics Engineers
ISSN:0196-2892
Status:veröffentlicht
Stichwörter:synthetic aperture radar (SAR) tomography, Deformation analysis in urban areas, persistent scatterer interferometry (PSI)
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt
HGF - Programmthema:Erdbeobachtung
DLR - Schwerpunkt:Raumfahrt
DLR - Forschungsgebiet:R EO - Erdbeobachtung
DLR - Teilgebiet (Projekt, Vorhaben):R - Sicherheitsrelevante Erdbeobachtung
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Hochfrequenztechnik und Radarsysteme > Radarkonzepte
Hinterlegt von: Radzuweit, Sibylle
Hinterlegt am:18 Nov 2016 11:51
Letzte Änderung:31 Jul 2019 20:05

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