| 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 |
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| 引用本文： | 王艳,廖明生,李德仁,魏子新,方正.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[J].地球物理学报,2007,50(2):598-604. |
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| 作者姓名： | 王艳 廖明生 李德仁 魏子新 方正 |
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| 作者单位： | 1.武汉大学测绘遥感信息工程国家重点实验室，武汉 430079 2 上海市地质调查研究院，上海 200072 |
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| 基金项目： | 国家自然科学基金，国家高技术研究计划发展专项经费，中国科技部-欧洲空间局"龙"计划合作项目 |
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| 摘 要： | 方法，相干目标分析是利用时间序列多景影像获取地表稳定反射体——高相干点目标的新方法.实验区选择上海市主城区约100 km2 区域，InSAR的实验数据采用覆盖1992～2000年间的25景ERS-1/2的单视复影像.在无先验沉降场模型的情况下，实验结果显示该实验区的地面沉降场在时间范围上跨越8年，平均观测时间采样率约为4个月，垂直形变精度优于5 mm，满足我国对城市地面沉降形变观测的要求.研究结果表明该方法可以用于今后大时间/空间尺度上的高精度地表形变观测.
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| 关 键 词： | 油藏流体流动单元 时移地震 差异振幅 流体性质 储层物性 |
| 文章编号： | 0001-5733（2007）02-0598-07 |
| 收稿时间： | 2006-02-15 |
| 修稿时间： | 2006-02-15 |
Circulation characteristics of interannual and interdecadal anomalies of summer rainfall in north Xinjiang |
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| WANG Yan,LIAO Ming-Sheng,LI De-Ren,WEI Zi-Xin,FANG Zheng.Circulation characteristics of interannual and interdecadal anomalies of summer rainfall in north Xinjiang[J].Chinese Journal of Geophysics,2007,50(2):598-604. |
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| Authors: | WANG Yan LIAO Ming-Sheng LI De-Ren WEI Zi-Xin FANG Zheng |
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| Institution: | 1.State Key Laboratory for Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China 2 Shanghai Institute of Geological Survey, Shanghai 200072, China |
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| Abstract: | 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. |
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| Keywords: | Coherent target D-InSAR Atmospheric effect Temporal decoherence Temporal sampling Land subsidence field |
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