期刊
2011 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
卷 -, 期 -, 页码 3468-3471出版社
IEEE
DOI: 10.1109/IGARSS.2011.6049967
关键词
Interferometric SAR; distributed scatterers; covariance matrix; phase history
Measuring the long-term line-of-sight deformation using a multipass SAR data stack by standard persistent scatterer technique has been explored since the late 1990s. Researches have been continuously conducted on increasing the data coverage at non-PSrich areas. The recently developed SqueeSAR (TM) technique has validated the potential of extracting useful information from distributed scatterers. With the availability of high resolution TerraSAR-X spotlight data, this technique can benefit greatly from its higher data density and quality. This article presents an algorithm of parameter estimation at distributed scatterers by maximum likelihood estimator in high resolution TS-X spotlight data. Different to SqueeSAR (TM), this article pays particular attention to the accurate covariance matrix estimation for phase history retrieval on each individual distributed scatterer. Solutions are presented for adaptive sample selection by a different statistical test (Anderson-Darling). An adaptive multiresolution defringe algorithm is introduced to cope with the problem of accurate fringe removal and in turn accurate covariance matrix estimation. And finally maximum likelihood estimator was employed to estimate the model parameters by weighting each measurement according to its coherence. By combining both the persistent scatterers and distributed scatterers, the increase in the capable monitoring area is phenomenal.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据