DEVELOPMENT AND IMPLEMENTATION FOR CALCULATION MODEL OF MEASURING CO-SEISMIC DEFORMATION FIELD BY USING ASCENDING AND DESCENDING ORBIT SAR DATA

摘要

Interferometry Synthetic Aperture Radarrn(InSAR)can only measure one component of thernsurface deformation in the satellite's line of sightrn(LOS) instead of that in vertical and horizontalrndirections, i.e. LOS Amphibious. In view of thisrnproblem, we analyzed and summarized somernmethods that can measure the three-dimensionalrndeformation of ground surface by using D-InSAR,rndeveloped the calculation model of measuring thernthreedimensional co-seismic deformation filed byrnusing the ascending and descending orbit SAR data.rnThe Formula of left-looking (both ascending andrndescending orbit data), right-looking (bothrnascending and descending orbit data) and generalrnexpression were proposed. The model was appliedrnon L'Aquila earthquake, and the results reveal thatrnthe earthquake has caused displacement in bothrnvertical and horizontal directions, and thernearthquake made the area down lift 16.8cm alongrnthe vertical direction. The characters of the surfacernreflected by the results are very consistent with therngeological exploration.