SBAS surface deformation monitoring with PS feature points

doi:10.13474/j.cnki.11-2246.2020.0118

Abstract

Abstract: In view of the problem that the artificial selection of ground control points in SARscape SBAS will affect the monitoring results, a SBAS surface deformation monitoring method with PS feature points is proposed. By setting the amplitude dispersion index and the coherence threshold in PS, the feature points in PS monitoring results are extracted as the ground control points for orbit refining and deformation inversion. The Sentinel-1 images covering Nanchang area from March 2017 to December 2018 are used to monitor and verify the surface deformation. Both the monitoring results of this method and PS method show that the study area has a small increase during the monitoring period. The correlation of annual average sedimentation rate reached 0.959, which is highly consistent. The monitoring results of this method, PS method and the SBAS method of manually selecting ground control point are compared with the leveling data. The error between this method and the leveling data was no more than 3.5 mm, which shows the validity of this method.

Key words: PS, SBAS, feature points, orbital refining, deformation monitoring

CLC Number:

NIE Yunju, XIONG Jiacheng, CHENG Penggen, LUO Yue. SBAS surface deformation monitoring with PS feature points[J]. Bulletin of Surveying and Mapping, 2020, 0(4): 91-95.

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