论文部分内容阅读
结合时间序列InSAR技术,在无先验形变模型的情况下,研究了中分辨率Envisat ASAR数据在堤坝监测中的应用。首次使用24景Envisat ASAR影像得到了上海市长江口南岸和杭州湾北侧堤坝的沉降速率。实验结果表明,堤坝存在着不均匀沉降,其中位于浦东机场堤坝和临港新城堤坝的沉降最为严重。利用水准数据对临港新城堤坝的监测结果进行了验证,监测精度达到了mm级,证明了时间序列SAR影像在堤坝形变监测上的有效性和应用潜力。
Combined with time series InSAR technology, the application of medium resolution Envisat ASAR data in dam monitoring is studied without prior deformation model. For the first time, using the 24-scene Envisat ASAR images, the sedimentation rates of dykes on the south bank of the Changjiang Estuary and the north of Hangzhou Bay were obtained. The experimental results show that the embankment has uneven settlement, of which the settlement at the Pudong Airport Embankment and Lingang New City embankment is the most serious. The monitoring results of Lingang New City dyke are verified with the leveling data, and the monitoring accuracy reaches the level of mm, which proves the effectiveness and potential of the time series SAR images in dam deformation monitoring.