Subsequent processing of deformation data of miniature ground-based interferometric radar

doi:10.13474/j.cnki.11-2246.2023.0076

Abstract

Abstract: Based on the micro-ground-based interferometric radar developed by School of Geodesy and Geomatics of Wuhan University, For the deformation data of Chongqing Laijia Bridge obtained by micro-ground-based high-speed real aperture interferometric radar, the subsequent processing method of deformation data is studied. Aiming at the problems of noise and phase fracture in deformation data due to occlusion, the processing method is proposed to solve them. On the noise problem, the denoising effects of various filters are simulated and compared, and the conclusion that the wavelet transformfilter has the best effect is obtained. In the phase fracture problem, a phase fracture detection and repair algorithm based on time-frequency characteristics of deformation data is proposed to realize the automatic treatment of phase fracture problem, and the effect is remarkable.

Key words: ground-based interference radar, deformation data, phase fracture, filter

CLC Number:

P237

ZHANG Lingzi, ZHANG Tao, ZOU Jingui. Subsequent processing of deformation data of miniature ground-based interferometric radar[J]. Bulletin of Surveying and Mapping, 2023, 0(3): 79-83,127.

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