中文摘要：

用天津地区2003-10—2009-06月38景ENVISAT ASAR数据进行差分干涉和PS像元选取实验,提取试验区沉降量,得到该区的平均沉降速率,并在试验区内取4个典型区域PS像元绘制了时间序列沉降图。

英文摘要：

By using 38 ENVISAT ASAR images between 2003-10-2009-06 of TianJin area, we conduct the differential interferometry and PS pixel selection experiment, and then extract the subsidence of experimental area. According to the time and space characteristics, using space and time filter to separate the atmospheric delay, orbit error, DEM residual phase, we obtained average settlement rate of test site, and finally selected PS pixels in four typical regional mapped the time sequence settlement diagram.