期刊
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
卷 49, 期 1, 页码 547-556出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TGRS.2010.2052625
关键词
Interferometric synthetic aperture radar (InSAR); least squares; phase ambiguity; phase unwrapping; synthetic aperture radar (SAR)
类别
资金
- Research Grants Council of the Hong Kong Special Administrative Region [PolyU 5155/07E]
- Faculty of Construction and Land Use of The Hong Kong Polytechnic University
- NASA [2005-0021]
- U.S. Geological Survey
- Hong Kong Polytechnic University
In this paper, we propose a least-squares-based method for multitemporal synthetic aperture radar interferometry that allows one to estimate deformations without the need of phase unwrapping. The method utilizes a series of multimaster wrapped differential interferograms with short baselines and focuses on arcs at which there are no phase ambiguities. An outlier detector is used to identify and remove the arcs with phase ambiguities, and a pseudoinverse of the variance-covariance matrix is used as the weight matrix of the correlated observations. The deformation rates at coherent points are estimated with a least squares model constrained by reference points. The proposed approach is verified with a set of simulated data.
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