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.
Advances in SqueeSAR™ analysis
FERRETTI, ALESSANDRO;PRATI, CLAUDIO MARIA;ROCCA, FABIO
2012-01-01
Abstract
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.File in questo prodotto:
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DEM_SQUEESAR.pdf
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