Sentinel-1 A-DInSAR Approaches to Map and Monitor Ground Displacements

Persistent scatterer interferometry (PSI) is a group of advanced interferometric synthetic aperture radar (SAR) techniques used to measure and monitor terrain deformation. Sentinel-1 has improved the data acquisition throughout and, compared previous sensors, increased considerably differential SAR (DInSAR) PSI deformation monitoring potential. The low density persistent (PS) in non-urban areas critical issue DInSAR inspired development alternative approaches refinement PS chains. This paper proposes two different complementary data-driven procedures obtain maps. These aim exploit highly coherent interferograms their short revisit time. first approach, called direct integration (DI), aims at providing very fast straightforward approach screen-wide easily detects active areas. fully exploits from consecutive images provided by Sentinel-1, resulting high sampling density. However, it lacks robustness its usability lays on operator experience. second method, geomatics (PSIG) temporal baseline, provides constrained application PSIG chain, CTTC PSI. It uses baseline does not assume any model for point selection. also quite which improves performances standard increasing robust measurements. effectiveness illustrated through analyses performed test sites.