Abstract：Taking the key subsidence area(north China plain) as the research area, we analyze the influence of incident angle difference, deformation reference point difference and atmospheric phase difference on InSAR monitoring results of multiple adjacent tracks. By introducing the quasi-stable datum adjustment method, comprehensively considering the leveling bedrock point, InSAR deformation reference point, CORS station and other factors to select quasi-stable points, we analyze the stability of InSAR monitoring results in the study area. We use the quasi-stable datum adjustment method to carry out the overall adjustment of time series InSAR monitoring results, and achieve the datum unification of vertical deformation field of large-scale multi-track InSAR. We check the internal coincidence accuracy of adjustment results based on the redundant observations in the overlap area of InSAR adjacent orbits. The average error after the quasi-stable datum adjustment is better than 5 mm, and the mean square error is better than 9 mm. We check the external coincidence accuracy of adjustment results based on the vertical displacement monitoring results of CORS stations, and the two are in good agreement.
DU Zhaofeng,ZHOU Xiaomin,CHENG Xiaokai et al. esearch on Quasi-Stable Datum Adjustment Method for Multi-Track Time Series InSAR[J]. jgg, 2023, 43(11): 1199-1204.
