Persistent Scatterer Interferometry: Potential, Limits and Initial C- and X-band Comparison

This paper is focused on the potential and limits of Persistent Scatterer Interferometry (Psi). a powerful remote sensing technique used to measure deformation phenomena It only refers to satellite-based PSI techniques, focusing on the most important sources of C-band SAR data 06 and Envisat In addition, it compares C- and X-band results, considering data from the high-resolution TerraSAR-X sensor. The paper begins with a description of the main characteristics of PSI. It then discusses the most important PSI products and their performances, analyzing their spatial sampling, the so-called residual topographic error and PSI geocoding. the average displacement rates, and the deformation time series As C-band products are concerned, the paper reports some relevant Pia validation results. which come from the ESA-funded Terrafirma Validation Project Regarding the X-band, It describes the results obtained over the City of Barcelona by processing 13 TerraSAR-X images The last part discusses the main limits of PSI