Advances in SqueeSAR(exp TM) Analysis

Conference: EUSAR 2012 - 9th European Conference on Synthetic Aperture Radar
04/23/2012 - 04/26/2012 at Nuremberg, Germany

Proceedings: EUSAR 2012

Pages: 3Language: englishTyp: PDF

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Ferretti, Alessandro; Fumagalli, Alfio; Novali, Fabrizio; Rucci, Alessio (Tele-Rilevamento Europa – T.R.E. s.r.l., Italy)
Prati, Claudio; Rocca, Fabio (Politecnico di Milano, Italy)

The SqueeSAR approach allows to jointly process PS and DS. For each DS, the coherence matrix is “squeezed” to pass from N(N-1)/2 interferograms to N “optimum” phase values. In order to retrieve a time series of displacement values for each DS, it is however important to have a “connected path” from the first to the last acquisition of the dataset, via high-coherence interferograms. In this paper we show how to overcome this limit in order to estimate high precision DEM fort he so called TCS (Temporary Coherent Scatterer) by means of a Maximum Likelihood estimator