Polarimetric Approaches for Persistent Scatterers Interferometry

Victor D. Navarro-Sanchez, Juan M. Lopez-Sanchez, Laurent Ferro-Famil
2014 IEEE Transactions on Geoscience and Remote Sensing  
In previous works, a general framework to exploit polarimetric diversity to optimize the results of Persistent Scatterers Interferometry (PSI) was presented, but tested only with dual-pol data. In this paper, the performance of these algorithms is assessed using fully polarimetric data, acquired by Radarsat-2 satellite over the urban area of Barcelona (Spain). In addition, two new highly efficient polarimetric optimization methods, named MIPO and JDPO, are introduced and evaluated. Given the
more » ... uated. Given the variety of dual-pol configurations provided by current polarimetric satellites, such as TerraSAR-X and Radarsat-2, and the upcoming launch of Sentinel-1, ALOS-2 and Radarsat Constellation Mission, a study has been also carried out in order to determine the best performing dual-pol configurations for polarimetric PSI. Subsidence maps of the area of study are computed for single-pol, dual-pol and full-pol data, which show the increase of density of pixels with valid deformation results as more polarimetric information is made available. In particular, for full-pol data we get an increase of up to 2.5 times more pixels for coherence-based PSI techniques (degraded-resolution), and over 4 times more for amplitude-based approaches (fullresolution), in comparison with single-pol data. Both higher density and quality of pixels yield better results in terms of coverage and accuracy.
doi:10.1109/tgrs.2013.2253111 fatcat:o53mueqdkbf6zlcm7w67azruuu