D-InSAR技术在地面沉降监测中的应用

The D-InSAR technique for the land subsidence monitoring

重复轨道差分干涉测量(D-InSAR)技术在监测地表形变方面得到了深入的研究和广泛的应用。本研究将时间序列分析方法引入到差分干涉测量技术中,并和永久散射体技术相结合,提出一种基于PS点的差分干涉时间序列分析方法。该方法以干涉图上两个较近PS点的相位差为研究对象,能够消除大气相位延迟对差分干涉处理的影响。并将该方法应用在天津地面沉降监测实验中,获得了天津地区地面沉降数据和沉降分布图,取得了比较满意的结果。

The D-InSAR technique has obtained widespread application and deeply research for the land deformation monitoring. In our study, a kind of method of time series radar interferometry based on permanent scatterers is put forward. In the method the phase difference of two nearer permanent scatterers in an interferogram is taken as the research object. Therefore the atmospheric delay impact can be eliminated. Through the experiment of Tianjin area subsidence monitoring using this method, the satisfactory land subsidence data and distribution map have been successfully achieved.