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Spaceborne Differential SAR Interferometry: Data Analysis Tools for Deformation Measurement
Institute of Geomatics, Av. Gauss 11, E-08860 Castelldefels, Spain
Department of Earth Sciences, University of Milan, Via Cicognara 7, I-20129 Milan, Italy
* Author to whom correspondence should be addressed.
Received: 30 November 2010; in revised form: 13 January 2011 / Accepted: 10 February 2011 / Published: 15 February 2011
Abstract: This paper is focused on spaceborne Differential Interferometric SAR (DInSAR) for land deformation measurement and monitoring. In the last two decades several DInSAR data analysis procedures have been proposed. The objective of this paper is to describe the DInSAR data processing and analysis tools developed at the Institute of Geomatics in almost ten years of research activities. Four main DInSAR analysis procedures are described, which range from the standard DInSAR analysis based on a single interferogram to more advanced Persistent Scatterer Interferometry (PSI) approaches. These different procedures guarantee a sufficient flexibility in DInSAR data processing. In order to provide a technical insight into these analysis procedures, a whole section discusses their main data processing and analysis steps, especially those needed in PSI analyses. A specific section is devoted to the core of our PSI analysis tools: the so-called 2+1D phase unwrapping procedure, which couples a 2D phase unwrapping, performed interferogram-wise, with a kind of 1D phase unwrapping along time, performed pixel-wise. In the last part of the paper, some examples of DInSAR results are discussed, which were derived by standard DInSAR or PSI analyses. Most of these results were derived from X-band SAR data coming from the TerraSAR-X and CosmoSkyMed sensors.
Keywords: X-band; very high resolution imagery; TerraSAR-X; CosmoSkyMed
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Crosetto, M.; Monserrat, O.; Cuevas, M.; Crippa, B. Spaceborne Differential SAR Interferometry: Data Analysis Tools for Deformation Measurement. Remote Sens. 2011, 3, 305-318.
Crosetto M, Monserrat O, Cuevas M, Crippa B. Spaceborne Differential SAR Interferometry: Data Analysis Tools for Deformation Measurement. Remote Sensing. 2011; 3(2):305-318.
Crosetto, Michele; Monserrat, Oriol; Cuevas, María; Crippa, Bruno. 2011. "Spaceborne Differential SAR Interferometry: Data Analysis Tools for Deformation Measurement." Remote Sens. 3, no. 2: 305-318.