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。
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.
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2011年第12期1461-1465,共5页
Geomatics and Information Science of Wuhan University
基金
江苏省科技支撑计划资助项目(BE2010316)
江苏省资源环境信息工程重点实验室(中国矿业大学)开放基金资助项目(JS200902)
中国科技部-欧洲空间局"龙"计划二期合作项目(ID5343)
