Subsidence analysis in Tianjin based on PSI technique using PALSAR FBD data

Persistent Sactterers Interferometry(PSI) technique is a series of advanced DInSAR methods which can reconstruct the time-series deformation of those coherent points in the direction of the satellite line-of-sight(LOS) with millimetric accuracy over a long temporal scale. It overcomes the problems caused by temporal and geometric decorrelations and the atmospheric dishomogeneities in conventional DInSAR by only considering the coherent pixels on temporal scale. Taking different polarimetric channels data into account, the same sense shows different coherence. In this paper we focuses on the benefits of using polarimetric data in PSI technique, as expected the different deformation results obtained from different polarizations can be mutually complementary to make the deformation estimation more robust, besides that, different polarizations are helpful to interpret the deformation.