Application of PS-InSAR to monitoring Berkeley landslides

To monitor Berkeley hills landslides,stacks of ERS1/2, Radarsat-1 and TerraSAR-X spaceborne SAR data ordered between 1992 and 2010 were utilized by an advanced interferometry method, persistent scatterer interferometry synthetic aperture radar (PS-InSAR). Differential interferometry processing was firstly made between one master SAR scene and all the other SAR scenes. The PS points were then selected by setting thresholds for both amplitude and phase part of SAR data. Based on the spatial and temporal characteristics of SAR differential phase, the deformation phase of PS points was filtered out. The results clearly locate landslides areas and the velocity maps of different SAR data show good consistence with each other.