Algorithm of Interferometric Coherence Estimation for Synthetic Aperture Radar Image Pair
نویسندگان
چکیده
Interferometric coherence is an important indicator of reliability for interferograms obtained by interferometric synthetic aperture radar (Interferometric SAR, InSAR). Areas with low coherence values are unsuitable for interferometric data processing. Also, it may be used as a classification parameter for various coverage types. Coherence magnitude can be calculated as an absolute value of the correlation coefficient between two complex SAR images with averaging in a local window. The problem in coherence estimation is in its dependence on phase slope caused by relief topography (topographic phase). A method for suppression of the topographic phase influence is proposed, based on the spatial phase derivation.
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