Using InSAR To Extract The Deformation Field And Determine The Source Parameters Of BAM Earthquake

Interferometric Synthetic Aperture Radar (InSAR) is the most rapidly developed and the most potential technology of remote sensing of the 20th century. In recent years, the technology of using InSAR to extract the three-dimensional information of ground surface has acquired tremendous progress. Air borne InSAR can provide surface elevation with an accuracy of less than 1 m, while space borne InSAR can derive surface deformation of the level of radar wavelength. Differential Interferometry Synthetic Aperture Radar (DInSAR) technology is a newly developed technology for monitoring large-scale surface deformation, with high accuracy, a wide range of coverage and non-access to deformation area. InSAR are widely used in the topographic mapping, surface subsidence detection, earthquake deformation monitoring, geological survey and so on. This study mainly includes:1. The basic principles of InSAR and DInSAR were discussed. The SLC data format of satellite SAR and the corresponding parameters on interferometry have been thoroughly studied, and the InSAR data processing procedures was explained in this paper.2. Using the ENVISAT SAR data of BAM area, we obtained the deformation caused by BAM earthquake that were consistent with those by other geoscience institutes. The InSAR derived earthquake deformation is proved to be unique and with high accuracy and reliability.3. The basic theory of Okada elastic half-space dislocation model was introduced and used to simulate the surface deformation field.4. Source parameters were determined by using the least-squares-Optimization, InSAR derived surface deformation, and the Okada elastic half-space dislocation model.