期刊
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
卷 38, 期 5, 页码 2202-2212出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/36.868878
关键词
atmospheric measurements; digital elevation model (DEM) reconstruction; geodetic measurements; interferometry; phase unwrapping; radar data filtering; synthetic aperture radar (SAR)
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.
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