Application of persistent scatterer interferometry for identification of landslide areas of Himalayan region

ENVISAT ASAR images acquired during 2003-2007 were processed for landslide movement using PSInSAR and SBAS methods over Himalayan region. The mean velocity of the landslide movement obtained with ascending and descending pass data using PSInSAR is around ± 16 mm/yr and SBAS method gives -25 to 15 mm/yr with descending pass and -39 to 38 mm/yr with ascending pass data sets. The number of PS points found with SBAS method is much less than that of obtained using PSInSAR. The effectiveness of the result shows highest movement in steeply sloped region.