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First Results from Multifrequency Interferometry. A comparison of different decorrelation time constants at L, C, and X Band

Parizzi, Alessandro und Cong, Xiaoying und Eineder, Michael (2009) First Results from Multifrequency Interferometry. A comparison of different decorrelation time constants at L, C, and X Band. In: ESA Scientific Publications (SP-677), Seiten 1-5. ESA FRINGE Workshop 2009, Frascati.

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Kurzfassung

The measurement of displacement from SAR images, using either interferometric or correlation techniques, is always carried out from a comparison between two or more acquisitions separated in time. It is therefore necessary to evaluate the level of phase decorrelation between the two acquisitions in order to understand the quality of the measures that can be obtained. The change of radar resolution cells in time is known to be the main responsible of the gradual decorrelation of the interferometric phase. However, a model that physically describes this process, is at the moment not available. Exploiting the test sites from GITEWS and Exupery, German projects focussed on determination of geo-risks, an analysis of the decorrelation time constants was performed on SAR data from PALSAR, ASAR and TerraSAR-X. Time series of the coherence have been computed and compared with simple statistical models. The time constants were analyzed as a measure of temporal decorrelation, in order to forecast the precision of displacement measures also for future missions. The extracted parameters were finally compared with the type of land covering using optical data and land use maps in order to determine a qualitative relationship between them and extend their validity in a more global context.

Dokumentart:Konferenzbeitrag (Vortrag)
Titel:First Results from Multifrequency Interferometry. A comparison of different decorrelation time constants at L, C, and X Band
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Parizzi, AlessandroIMF SV
Cong, XiaoyingTU Muenchen
Eineder, MichaelIMF SV
Datum:Dezember 2009
Erschienen in:ESA Scientific Publications
Referierte Publikation:Nein
In ISI Web of Science:Nein
Seitenbereich:Seiten 1-5
Status:veröffentlicht
Stichwörter:DInSAR,Decorrelation.
Veranstaltungstitel:ESA FRINGE Workshop 2009
Veranstaltungsort:Frascati
Veranstaltungsart:internationale Konferenz, Workshop
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W - keine Zuordnung
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W - keine Zuordnung
DLR - Teilgebiet (Projekt, Vorhaben):W -- keine Zuordnung (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Methodik der Fernerkundung > SAR-Signalverarbeitung
Hinterlegt von: Alessandro Parizzi
Hinterlegt am:15 Jan 2010 14:12
Letzte Änderung:12 Dez 2013 20:51

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