Time sequence InSAR deformation monitoring method and system based on high resolution

Abstract

The invention discloses a time sequence InSAR deformation monitoring method and system based on high resolution. The method comprises the steps of carrying out registration, differential interferenceprocessing and elevation removal processing on a surface SAR image; identifying PS points in the image; thinning the PS points of which the point density exceeds a set threshold value; constructing atriangulation network for the thinned PS points; differentiating the phases of the adjacent PS points in the triangulation network, obtaining a deformation rate difference and an elevation correctiondifference between the adjacent PS points through a solution space search method, and calculating the residual phase of each PS point according to the deformation rate difference and the elevation correction difference; separating an atmospheric delay phase from the residual phase, and carrying out interpolation processing on the atmospheric delay phase; removing the atmospheric delay phase from the differential interferogram, repeating the above steps for iteration, obtaining an image after the atmospheric delay phase is removed for many times, carrying out the phase unwrapping of the image,carrying out analysis on all PS points, and determining the deformation rate of the ground surface. According to the invention, the image processing rate is improved.

Description

technical field [0001] The invention relates to the technical field of microwave remote sensing, in particular to a high-resolution time-series InSAR deformation monitoring method and system. Background technique [0002] IInSAR is an active microwave radar detection technology. It has technical advantages such as large scale, low cost and high precision. Conventional Differential SAR Interferomtry (DInSAR) technology calculates the deformation by making a difference between two images, but because DInSAR technology is affected by the phenomenon of decoherence, the current international research on InSAR technology mainly focuses on long-term sequence DInSAR Technical research, such as: PSInSAR technology (Ferretti et al., 2002), coherent target detection technology (Vander Kooij, 2003), interference point target analysis (Wegmuller, 2003; Werner et al., 2003), stable point network analysis (Arnaud et al., 2003), small baseline set technique (Berardino et al. 2003) and so ...

AI Technical Summary

Problems solved by technology

While the resolution is improved, it brings a huge amount of data; the iteration of large amount of data seriously affects the efficiency of data processing, and the use of ordinary PCs or even image servers cannot achieve fast data processing

It has become a major problem hindering the promotion of InSAR technology to engineering

Images