Method for monitoring earth surface deformation based on sequential InSAR technology

Abstract

The invention relates to a method for monitoring the earth surface deformation based on a sequential InSAR technology. The method comprises steps of SAR data selection, stereo image pair registration,noise filtering processing, interference fringe pattern generation, de-leveling effect execution, phase unwrapping, elevation and elevation coordinate system conversion. The method is especially suitable for high-precision phase unwrapping in areas with large topographic relief, such as a mountainous area and frequent surface deformation, such as an artificial active area; defects caused by inapplicability to the phase continuity assumption and the surface elevation invariance assumption in the conventional algorithm can be overcome; the phase unwrapping accuracy can be improved and thus thesurface elevation deformation inversion accuracy can be enhanced; and a high-precision monitoring way is provided for geological disasters along the transmission line in the region.

Description

technical field [0001] The invention relates to the field of power transmission line survey, in particular to a method for monitoring surface deformation based on time series InSAR technology. Background technique [0002] my country is a country where geological disasters often occur. In recent years, the probability of geological disasters has increased greatly, such as earthquakes, landslides, etc. The external manifestation of these geological disasters is the deformation of the surface, which will cause great harm. The safety of human life will be greatly affected. Therefore, it is very important to detect these disasters as early as possible and take timely preventive measures. [0003] As a very effective technology, Synthetic Aperture Radar Interferometry (InSAR) restores the original information through radar, and the result is very accurate, so it has great development potential in many aspects, such as underground resource detection and disaster monitoring. In re...

AI Technical Summary

Problems solved by technology

However, the existing multi-baseline phase unwrapping methods take into account the new assumption that the surface does not undergo large deformations during the acquisition of time-series SAR images

Obviously, this assumption is generally satisfied, but in areas with more artificial activities or complex geological conditions, the surface often deforms over time, and the assumption cannot be established, which leads to defects in the existing method, and the accuracy needs to be further improved

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