基于D-InSAR三轨法的北京平原区地表形变监测

摘要

首先阐述了D-InSAR三轨法提取地表形变的基本原理,以北京平原区为实验区域,利用2009年9月到2010年4月间时隔210d的三景Envisat ASAR数据进行解算,获取了该时间段内北京市城区范围内的整体地表形变,并将其与常规水准测量结果进行比较.结果表明,实验区监测结果范围与传统测量方法累计沉降量等值线吻合较好,D-InSAR三轨法能很好地反映实验区域的地面沉降情况.%We described the basic principles of the D-lnSAR 3-pass method to extract the surface deformation and subsidence at the beginning. Taking Beijing Plain area as the experimental area, using and calculating 3 experiment data which was produced during 09/2009～04/2010 that lasts 210 days, we obtained the overall surface deformation of Beijing urban area limits during that period. We compared the InSAR result with leveling measurement method and the monitoring result of the experiment area. The results show that the 3-pass D-lnSAR method can well reflect land subsidence situation of the experimental regional.