本文简要介绍了已知DEM的二路差分的基本原理,并以西藏2004年7月12日仲巴地震为例,获取了仲巴地震的同震形变场。采用Okada弹性半空间位错模型反演了该地震的震源参数,得到了最佳震源机制解。结果表明:仲巴地震是以倾滑为主的右旋正断层型地震,断层面走向近乎南北方向(179°),倾角43°,深度13Km,三个方向的位移矢量分别为:-200mm、700mm和0mm。
In the paper, two-pass differential interferometric processing method was generally introduced. Then Zhongba earthquake was selected as an example to obtain the coseismic deformation field. The result indicated that it is a shallow dip-slipping predominant normal-fauh earthquake. The strike of fault plane is nearly South-North ( 179° ), dip angle 43°, depth 13km, displacement vector of three directions are : - 200ram, 700ram and 0ram.