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Coherent scatterer detection analysis over different test sites using TerraSAR-X images

Sanjuan-Ferrer, Maria J. und Hajnsek, Irena und Papathanassiou, Konstantinos P. (2013) Coherent scatterer detection analysis over different test sites using TerraSAR-X images. In: Proceedings of ESA POLinSAR Workshop, Seiten 1-7. ESA Communications. ESA POLinSAR Workshop, 2013-01-28 - 2013-02-01, Frascati, Italy.

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Kurzfassung

The identification of scatterers having a point-like scattering behaviour in SAR images has become an important topic with a wide range of applications in different scenarios, ranging from image calibration to object characterization and information extraction. In particular, this work is focused in the detection of the so-called coherent scatterers (CS’s), which are commonly associated with high scattering amplitudes, deterministic phases, high spectral correlation and high interferometric coherence values. Additionally, they are widely unaffected by multiple scattering effects and geometrical distortion, allowing a more direct interpretation. The advantage of CS’s compared with other point scatterers is that their detection is possible even on a single image basis. In the InSAR literature, a similar approach for scattering analysis and information extraction exploits the so-called permanent scatterers (PS’s), a different class of point-like scatterers. The PS’s detection is carried out by using large time series of acquisitions, and typically PS’s are required to be temporally stable. On the other hand, in the CS detection methods no assumptions are made about their temporal stability, making their usage appealing in fastly temporally variable scenarios like dynamic natural scenarios. So far, three different approaches were available for the CS detection, based on spectral correlation techniques by exploiting sublook images (i.e. images using only a portion of the available bandwidth) in range or azimuth direction. Recently, a new approach based on the generalized likelihood ratio test (GLRT) has been introduced. After an extensive theoretical performance analysis using the different detection methods and comparing the new proposed approach with the previous ones, the results have shown that the GLRT detector can achieve a better performance level than the other detectors, provided the same degradation of the spatial resolution. In this paper, the potential of the new CS detection method is tested on real data, over different scenarios (i.e. natural and urban environments), using TerraSAR-X images. In concrete, three different test sites are considered: for natural scenarios, the Helheim glacier (Greenland) and the Etna volcano (Italy) have been selected; and for urban area, the city of Paris (France) has been chosen. In particular, the performance analysis with the experimental data will be compared with the previous theoretical analysis and the impact on polarimetry will be analyzed in the test sites where polarimetric data is available.

Dokumentart:Konferenzbeitrag (Vortrag, Poster)
Titel:Coherent scatterer detection analysis over different test sites using TerraSAR-X images
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Sanjuan-Ferrer, Maria J.NICHT SPEZIFIZIERT
Hajnsek, IrenaNICHT SPEZIFIZIERT
Papathanassiou, Konstantinos P.NICHT SPEZIFIZIERT
Datum:März 2013
Erschienen in:Proceedings of ESA POLinSAR Workshop
Referierte Publikation:Ja
In ISI Web of Science:Nein
Seitenbereich:Seiten 1-7
Herausgeber:
HerausgeberInstitution und/oder E-Mail-Adresse der Herausgeber
Lacoste-Francis, H.esapub@esa.int
Verlag:ESA Communications
Status:veröffentlicht
Stichwörter:Coherent Scatterers (CSs), Synthetic Aperture Radar (SAR), TerraSAR-X, detection.
Veranstaltungstitel:ESA POLinSAR Workshop
Veranstaltungsort:Frascati, Italy
Veranstaltungsart:internationale Konferenz, Workshop
Veranstaltungsdatum:2013-01-28 - 2013-02-01
Veranstalter :ESA-ESRIN
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 - Vorhaben Multi-dimensionale SAR-Auswertung
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Hochfrequenztechnik und Radarsysteme > Radarkonzepte
Hinterlegt von: Maria Jose Sanjuan Ferrer
Hinterlegt am:26 Nov 2012 14:03
Letzte Änderung:08 Mai 2014 23:28

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