Abstract:Interferometric point target analysis (IPTA) eliminates the effects of atmospheric delay to a certain extent in the monitoring of regional surface deformation, so this paper adopts the idea of neighborhood differencing to reduce the auto-correlated phases in the differential interferograms. Delaunay triangulation with distance constraint is used to establish the baseline network between PS points, effectively avoiding long distance baseline and low quality PS points, and an adjacent array model is applied for searching and deleting the repeated baselines in order to improve computation efficiency. Simulated data are used to validate the program and then eight TerraSAR-X images from July 2015 to February 2016 are used to monitor deformation along the Datong-Xi’an high speed railway based on the program. The results show high consistency with the existing ground fissures and field investigation data, proving that the PS baseline network is practicable in deformation monitoring of linear engineering.
LIU Yuanyuan,ZHAO Chaoying,ZHANG Qin et al. Deformation Monitoring and Analysis of Linear Engineering with PS Baseline Network[J]. jgg, 2017, 37(8): 787-791.