Abstract：Aiming at the problem of insufficient monitoring information when InSAR technology is used to study the surface three-dimensional deformation, a three-dimensional deformation model with stochastic model constraints is established with GPS monitoring information as a priori. Considering that the LOS observation is insensitive to the North-South deformation due to the polar orbit of SAR satellite, the function constraint condition of 3D deformation solution is constructed with the strong constraint of GPS north-south deformation observation. The results of the simulation data and the measured data in Xi’an area show that the least squares solution based on the combination of stochastic model and functional model is more accurate than the parametric solution, with only functional model constraint or stochastic model constraint, and the parametric solution without any constraint.
MA Yange,ZHAO Lihua,ZHANG Panpan et al. Establishment of 3D Deformation Field by GPS-InSAR Data Fusion Method Based on Function and Stochastic Model[J]. jgg, 2019, 39(11): 1112-1117.
