A Space-Time Extension of the Minimum Cost Flow Phase Unwrapping Algorithm for DInSAR Time-Series Generation
Konferenz: EUSAR 2006 - 6th European Conference on Synthetic Aperture Radar
16.05.2006 - 18.05.2006 in Dresden, Germany
Tagungsband: EUSAR 2006
Seiten: 4Sprache: EnglischTyp: PDF
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Autoren:
Pepe, A. (Università degli Studi di Napoli Federico II – Dipartimento di Ingegneria Elettronica e delle Telecomunicazioni, via Claudio 21, 80125 Napoli, Italy)
Lanari, R. (Istituto per il Rilevamento Elettromagnetico dell’Ambiente, IREA – National Research Council of Italy (CNR),via Diocleziano 328, 80124 Napoli, Italy)
Inhalt:
We propose in this work an extension of the Phase Unwrapping (PhU) minimum cost flow (MCF) algorithm that exploits both the spatial properties and the temporal relationships among a set of multiple Differential Synthetic Aperture Radar (DInSAR) interferograms, relevant to a properly chosen sequence of SAR images. The proposed approach relies on the use of two distinctive Delaunay triangulations: the former is relevant to the SAR data distribution in the “Temporal/Perpendicular baseline” plane, the latter is carried out in the Azimuth/Range plane and involves the coherent pixels common to the generated interferograms. In particular, the unwrapping operation of the overall data set is performed via a two-step processing procedure carried out by applying the basic minimum cost flow approach to the two different triangulations. In order to validate the algorithm, a number of experiments on real SAR data were accomplished; the obtained results demonstrate the effectiveness of the proposed PhU approach.