【摘要】 从D-InSAR的基本原理出发,分析讨论了地形相位分量和地表形变相位分量对差分干涉相位的影响,导出了参考DEM误差和地表形变量对差分干涉相位贡献灵敏度的计算公式,得出雷达差分干涉测量中地表形变对相位贡献灵敏度要远远高于参考DEM误差对相位贡献灵敏度的结论。利用DORIS软件,对2003-12-26发生在伊朗东南部的Bam 6.6级地震区,借助高程精度约为30 m的GTOPO30 DEM和高程精度约为10 m的SRTM3 DEM分别进行"二轨"法差分干涉处理,带入同一幅干涉图10194-09693(时间间隔35 d、垂直基线为519 m的ENVISAT-ASAR影像对)中,得到了相似的6个干涉条纹,只是采用GTOPO30 DEM产生的干涉条纹有更多噪声的影响,验证了该结论的正确性。更多还原

【Abstract】 The influence of terrain phase component and ground deformation phase component on different interferogram phase is analyzed based on D-InSAR basic principles.The sensitivity calculation formula of ground deformation and reference DEM to InSAR phase is educed.The conclusion is that the sensitivity ratio of InSAR phase to ground deformation is higher than reference DEM.M6.6 earthquake happened at Bam City in the southeast of Iran on 2003-12-26.The damage area is used to test the conclusion by using open DORIS software.GTOPO30 DEM with elevation precision of 30 m and SRTM3 DEM of 10 m are adopted to deal with biorbit differential interferogram respectively,which are put into the same interferogram 10194-09693(ENVISAT-ASAR image pairs with 519 m vertical baseline and interval of 35 days).6 similar interference fringes obtained prove the conclusion though the interference fringes produced by GTOPO30 DEM are slightly influenced by noise.更多还原