Demonstration of TerraSAR-X ScanSAR Persistent Scatterer Interferometry

The concept of PSI Wide Area Product was introduced in ESA ́s GMES Terrafirma project [1] in preparation for the upcoming Sentinel-1 mission. Sentinel-1 provides unprecedented capabilities for wide area mapping due to the coverage of the IW (Interferometric Wide swath) mode, which is the predefined mode over land. The extension of the PSI technique to wide area deformation mapping presents many technical challenges, especially in non-urban areas and in mountainous areas [2]. The Integrated Wide Area Processor (IWAP) [3] has been developed at DLR for this purpose. This paper presents the processor extensions performed in order to support the ScanSAR and TOPS SAR acquisition modes in preparation for the Sentinel-1 mission.