16 October 2014

PhD Thesis Defense: High-resolution deformation measurement using Persistent Scatterer Interferometry

In the context of this PhD thesis defense, Núria Devanthéry Arasa presents her work realized at CTTC .


Persistent Scatterer Interferometry (PSI) is a group of advanced differential interferometric SAR techniques that are used to measure and monitor terrain deformation. Different PSI techniques have been proposed in the last two decades. In this thesis, the two PSI chains implemented and used at the Geomatics division of CTTC are described: the local area PSI and the PSIG chains. The first part of the thesis is devoted to the analysis of X-band data using the local area PSI chain to analyse the deformations over small areas. The second part of the thesis describes the PSIG chain, whose aim was to extend the interferometric processing to wide areas. The key steps of the PSIG procedure include a new selection of candidate PSs based on a phase similitude criteria and a 2+1D phase unwrapping algorithm. The procedure offers different tools to control the quality of the processing steps.