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Synthetic Aperture Radar (SAR) interferometry differential is one of the latest geodetic deformation measurement method of remote sensing techniques. Use of the European Space Agency April 15, 1996 acquired earth resources satellite ERS-1 data and the April 16 acquisition ERS-2 data, and ERS-2 data December 2, 1997 acquired the application of differential interferometry technique occurred in November 8, 1997 earthquake in Tibet Mani conducted applied research to extract regional deformation field the resulting change detection fringe figure surface rupture zone can be identified, and quantitative estimation and deformation around the epicenter near the two fault analysis results show that: the nature of the fracture to the left-lateral, horizontal fracture zone south of dislocation at least exceed the maximum amount of deformation 2.8 m, north of horizontal dislocation of the maximum deformation amount exceeds 1.75 m at least. differential interferometry and ground survey and analysis