中文摘要：

合成孔径雷达差分干涉测量技术是新近发展起来的用于监测大范围地表形变的新技术，具有精度高、监测范围广等特点。本文首先深入分析了D—InSAR技术的基本原理，然后通过实验成功获取了上海市中心城区相隔7个月的地面沉降结果，通过与常规方法获取的沉降图的对比，发现二者具有高度的一致性，从而证明了利用D-InSAR技术监测城市地面沉降具有良好的应用前景。

英文摘要：

Differential Synthetic Aperture Radar interferometry（D-InSAR） is a newly developed technique for monitoring large-scale ground deformation with some prominent advantages such as high accuracy and pantoseopie view. This paper firstly gives an introduction to the principle of D-InSAR. Then, the ground subsidence from1992.9 to 1993.4 over center area of Shanghai has been successfully detected using D-InSAR technique. Compared with the ground-based measurements, the results are viable and reliable. It also proved that the D-InSAR technique has a good prospect in urban land subsidence monitoring field in the future.