Iterative Solution to Temporal Phase Wrapping in Differential SAR Interferometry for high displacement rate phenomena

Abstract:
Temporal phase wrapping may be an issue in Differential SAR Interferometry (DInSAR) for terrain displacement monitoring, especially when the deformation rate of the phenomena under observation is high and/or the temporal sampling of the SAR dataset is poor. This work proposes upgrades in the Coherent Pixels Technique in order to deal with these situations. They are based on an iterative method to reach the optimum solution and an approach to obtain an a priori model of the displacement phenomenon. Both methods are tested with an Envisat ASAR data-set over a mining area.