The Extended SBAS Technique For Generating Full Resolution Ers/Envisat Deformation Time-Series

In this work we extend the Small BAseline Subset (SBAS) Differential SAR Interferometry approach to allow the generation of deformation time-series by processing long sequences of ERS-1, ERS-2 and ENVISAT SAR data at the full spatial resolution scale. Our idea is to avoid the generation of ERS/ENVISAT cross-interferograms, severely affected by noise phenomena, and to consider single-platform interferograms only (i.e. ERS/ERS and ENVISAT/ENVISAT interferograms), that are properly combined by applying the SVD-based SBAS approach. The presented results, achieved on two dataset relevant to the Napoli Bay area and to the Murge region (Italy), confirm the effectiveness of the presented technique and demonstrate the relevance of deformation analysis carried out at the scale of single buildings with more than 15 years of ERS and ENVISAT acquisitions.