%0 Journal Article
%T Circulation characteristics of interannual and interdecadal anomalies of summer rainfall in north Xinjiang<br>王艳，廖明生，李德仁等.利用长时间序列相干目标获取地面沉降场.地球物理学报，2007
%A WANG Yan
%A LIAO Ming-Sheng
%A LI De-Ren
%A WEI Zi-Xin
%A FANG Zheng
%A <br>王艳
%A 廖明生
%A 李德仁
%A 魏子新
%A 方正
%J 地球物理学报
%D 2007
%I 
%X Distribution of land subsidence could be obtained with long-term coherent targets analysis. Based on the conventional differential InSAR, coherent targets analysis is a new method to identify stable natural reflector, highly coherent pointy target, with multi-temporal SAR images. The test site in our experiment covers about 100 km 2 in the main downtown of Shanghai city. 25 scenes of single look complex images of ERS-1/2 from 1992 to 2000 are chosen as the import data set. The result of CT points over 8 years with average temporal sampling of 4 months has been presented in this paper. Without any apriori deformation model, the accuracy of the land subsidence velocity from CTA is less than 5 mm, which satisfies the requirement in monitoring urban subsidence in China. This investigation shows the potential of CTA approach in monitoring land deformation on a large temporal/spatial scale.
%K Coherent target
%K D-InSAR
%K Atmospheric effect
%K Temporal decoherence
%K Temporal sampling
%K Land subsidence field<br>相干目标
%K 差分合成孔径雷达干涉测量
%K 大气效应
%K 时间去相干
%K 时间采样率
%K 地面沉降场
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=1E44AE713D8A6DE0&jid=14DC41C59CBF6770055A7D610D53AE46&aid=5B073CA529EA7A03&yid=A732AF04DDA03BB3&vid=771152D1ADC1C0EB&iid=0B39A22176CE99FB&sid=4720E9D07E8A2290&eid=1A0C7C60D40EFD74&journal_id=0001-5733&journal_name=地球物理学报&referenced_num=1&reference_num=11