Diverse methods to monitoring volcanic deformation based on SAR interferometry

In this paper, different methods for the detection of the deformation signal with SAR data based on persistent scatterer interferomety (PSI) are described. Two test sites have been selected. For experimental purposes, two corner reflectors (CRs) were installed in the Fogo volcano. The location, phase as well as intensity of corner reflectors were analyzed with 11 TerraSAR-X stripmap (TSX-SM) data. For algorithmic development and validation, four stacks of TerraSAR-X high resolution spotlight (TSX-HSL) data from the Stromboli volcano have been acquired and used for PSI processing. The PSI results of deformation and topography update are fused by using point matching method with Iterative Closest Point (ICP). This research is a part of the German volcano monitoring project Exupèry, Work Package 2: `Space based observation techniques´.