First results of Stable Point Network software using TerraSAR-X data

The successful launch of TerraSAR-X has made high resolution Synthetic Aperture Radar images with a reduced temporal revisit time available. These new sensor characteristics influence the benefits of ground deformation estimation by means of advanced DInSAR techniques. This paper reviews the first experience in Persistent Scatterer Interferometry (PSI) processing, using a stack of TerraSAR-X Stripmap images. This processing was performed using the Stable Point Network (SPN) software. The selected test site is the city of Barcelona (Spain), showing different subsidence patterns due to underground works. Additionally, TerraSAR-X results show deformation profiles caused by thermal dilatation. The SPN software has been modified to detect and correct this type of signal, obtaining deformation profiles that are only related to ground movements. Finally, this paper presents a brief comparison of persistent scatterer density between ENVISAT and TerraSAR-X Stripmap data.