ESTABLISHMENT OF 3-D COSEISMIC TERRAIN DISPLACEMENT
FIELD WITH GPS AND InSAR
1)School of Surveying and Land Information Engineering of Henan Polytechnic University,Jiaozuo 454000
2)College of Surveying and GeoInformation of Tongji University, Shanghai 200092
3)Henan Collgeg of Industry and Information Technology,Jiaozuo 454000
Abstract The geometric transformation model between the INSARLOS deformation and GPS displacement is established.The model is employed to convert GPS displacement into the deformation in LOS direction. Based on Delaunay triangulations and cubic interpolation,the errors existed in InSARLOS deformation are rectified.According to variable fault slip model,the fault parameters are acquired by accurate GPS observations.According to the characteristic that the displacement direction derived from coseism is accordant in certain range, the displacement direction derived from forward modeling was applied to realize the transformation from InSARLOS to threedimensional deformation.The result shows that the displacement field is consistent with actual damage of surface ruptures.
