An Efficient Polarimetric Persistent Scatterer Interferometry Algorithm for Dual-Pol Sentinel-1 Data

With time-series PolSAR images, polarimetric persistent scatterer interferometry (PolPSI) algorithms can obtain optimized interferograms with overall better phase quality than any single-pol channel for ground deformation monitoring. Moreover, the open access of Sentinel-1 data makes it possible applications PolPSI over large regions worldwide. However, optimum scattering mechanism usually has to be searched in a high dimension solution space by techniques from each pixel. This is very or even unacceptable computational costs if satisfactory results are expected. To this end, an efficient and effective algorithm named as TP-ESM proposed study, which optimizes pixels' weighted sum their corresponding VV VH interferograms. The effectiveness tested together two other (i.e., TP-MSM ESPO) Beijing 46 images. show that similar interferometric phases ESPO pixels, monitoring pixel density improvement achieved w.r.t. conventional PSI approach (with data) 35% 43%, respectively. On hand, found not applicable data. Considering negligible cost ESPO, presents quite good performance on both interferograms' optimizations outperforms DS pxiels' optimization, anticipated have promising performances images acquired sensors.