Dual-polarization phase optimization earth surface deformation monitoring method combining PS target and DS target

Abstract

The invention provides a dual-polarization phase optimization earth surface deformation monitoring method combining a PS target and a DS target. The method comprises the steps of respectively selecting PS targets of VV and VH dual-polarization data through employing an average amplitude threshold method, and merging the PS targets of the two kinds of polarization data; identifying a DS target by using an Anderson-Darling test and an average amplitude threshold method, and carrying out noise reduction processing on the DS target by using adaptive mean filtering; generating a spatial coherence matrix based on the PS target and the DS target, separating a first principal component, namely, a maximum eigenvalue, by adopting a coherence matrix eigenvalue decomposition method, and searching an optimal scattering mechanism by adopting a BGSM algorithm to enable the phase contribution of the first principal component to be maximum, thereby being capable of effectively improving the coherence point target density and the phase quality; and finally, combining the PS target and the DS target to invert surface deformation.

Description

technical field [0001] The invention relates to the technical field of radar remote sensing and image processing, in particular to a dual-polarization phase-optimized surface deformation monitoring method combining PS targets and DS targets. Background technique [0002] Synthetic Aperture Radar Interferometry (InSAR) technology is a space earth observation technology produced in the 1960s, which can realize all-weather and all-weather earth observation without the limitation of light and weather conditions, and can also penetrate the surface and Vegetation acquires subsurface information. In 1998, the polarization synthetic aperture radar interferometry technology was produced. This technology studies the different polarization modes of the same target, and through the statistical analysis of the stability of the amplitude and phase information on the time series of multiple SAR images in the same area, it detects objects that maintain high coherence. Points are PS points....

AI Technical Summary

Problems solved by technology

[0003] However, the traditional PS point selection method is often due to its own limitations, resulting in insufficient number of points and point selection accuracy.

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