Correction method of atmospheric phase for arc-scanning synthetic aperture radar in landslide monitoring

doi:10.11947/j.AGCS.2022.20220301

Abstract

Abstract: Ground-based arc-scanning synthetic aperture radar realizes landslide warning through deformation measurement, and it is an important remote sensing method for landslide disaster monitoring. The atmospheric phase affects the accuracy of deformation value measurement, and the correction of the atmospheric phase is a key technology for long-term stable monitoring of the area of interest. In this paper, a two-stage atmospheric phase correction method based on grid division is proposed. This method obtains permanent scattering points through feature extraction and classification, realizes automatic screening of control points, and estimates atmospheric phase based on the grid. It effectively reduces the amount of computation, improves computational efficiency, and ensures the accuracy of atmospheric phase estimation by combining spatial and temporal filtering. The experimental results show the effectiveness of the proposed method in atmospheric phase correction.

Key words: ground-based arc-scanning synthetic aperture radar, landslide deformation monitoring, atmospheric phase correction, permanent scattering

CLC Number:

P237

DU Nianchun, WANG Yuming, SHEN Xiangqian, XIE Xiang. Correction method of atmospheric phase for arc-scanning synthetic aperture radar in landslide monitoring[J]. Acta Geodaetica et Cartographica Sinica, 2022, 51(10): 2139-2148.

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