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基于时间序列SAR影像分析方法的三峡大坝稳定性监测

, PP. 110-123

Keywords: 三峡工程,形变监测,合成孔径雷达干涉测量,永久散射体技术

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Abstract:

?本文提出了结合永久散射体和准永久散射体干涉测量技术的时间序列合成孔径雷达(SAR)影像几何信息提取方案,利用2003~2008年获取的40景SAR影像量测并分析了三峡大坝运行时的稳定性问题及其周边区域的形变规律.我们发现在数据获取期间,三峡大坝左段的时效沉降基本停止,大坝形变受水位的影响较大,季节性变化也有一定体现.该实验结果和已发表的该坝段形变监测结果十分吻合.在数据处理结果中我们还在大坝上游秭归县附近堤坝发现一处形变异常.研究结果表明了时间序列SAR影像信息提取技术在大坝稳定性监测及坝区形变参数获取中的应用潜力.

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