Nonlinear subsidence rate estimation using permanent scatterers in differential SAR interferometry
Nonlinear subsidence rate estimation using permanent scatterers in differential SAR interferometry
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DOI：
10.1109/36.868878
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发表时间：
2000-09-01
影响因子：
8.2
通讯作者：
Rocca, F
中科院分区：
文献类型：
--
作者：
Ferretti, A;Prati, C;Rocca, F
离散和暂时稳定的自然反射体或永久散射体（PS）可以从长时间序列的干涉SAR图像，即使基线大于所谓的临界基线。该图像像素的子集可以成功地用于高精度差分测量。我们讨论了使用PS在城市地区，如波莫纳，CA，显示沉降和absidence的影响。提出了一种基于简单统计假设的大气相位贡献和局地位移场的估计方法。为了科普目标的非线性运动，提出了新的解决方案。
Discrete and temporarily stable natural reflectors or permanent scatterers (PS) can be identified from long temporal series of interferometric SAR images even with baselines larger than the so-called critical baseline. This subset of image pixels can be exploited successfully for high accuracy differential measurements. We discuss the use of PS in urban areas, like Pomona, CA, showing subsidence and absidence effects. A new approach to the estimation of the atmospheric phase contributions, and the local displacement field is proposed based on simple statistical assumptions. New solutions are presented in order to cope with nonlinear motion of the targets.