【摘要】 针对永久散射体技术和短基线集法所需SAR数据较多的问题,采用时间序列干涉图叠加法监测区域地表沉降,提出利用结构函数作为判断因子提取出受大气扰动较小的干涉图用于叠加分析,以确保大气延迟误差对地表沉降监测结果影响的最小化。利用13景ASAR数据,研究了江苏省盐城市在2003-12～2009-05期间的地面沉降趋势。更多还原

【Abstract】 For permanent scatterer and small baseline subsets need no less than 20 SAR images to obtain reliable results,time series interferogram stacking method is used to detect the ground subsidence of Yancheng City.In order to minimize the effects of atmospheric delay error,structure function is used to extract the interferograms which have small atmospheric effects.The ground subsidence of Yancheng City during the period of 2003-12~2009-05 is obtained by 13 ASAR images.The results show that there are 4 subsidence funnels in Yancheng downtown during the period of 2003-12~2005-11.New subsidence funnels appear and local subsidence rate increases during the period of 2008-12~2009-05.更多还原