Deforamtion anylysis of Wenchuan earthquake based on D-InSAR with image mode

It is considerably destructive for Wenchuan earthquake. The derived deformation field is an effective way to retrieve the geophysical parameters and study the seismic mechanism. Numerous geodetic methods can be exploited for the earthquake deformation monitoring. In spite of the high accuracy and consistent temporal scale, the results of GPS measurements are discrete. Continuous deformation field can be derived from Interferometric Synthetic Aperture Radar(InSAR). For image mode(IM) has full resolution,we will use conventional InSAR to get deformation fileld of Wenchuan earthquake. First, the geolocation of Longmen Mountain areas was introduced. The process of IM interferometry was analyzed in detail. At last, the deformation field was derived with the extent of 100km×100km. The results revealed that it was not the largest deformation region at the earthquake focus. The closer you get to the fault zone, the larger deformation gradient of the heading wall it become. At the same time, IM Interferometry can not reveal deformation field because IM is too narrow to obtain the entire deformation field With the application to IM interferometry in Wenchuan earthquake, it is significant for earth science research such as earthquakes and crustal motion.