摘要
The subsidence of the mining area was monitored by analyzing the phase of permanent scatters(PS)which maintained high coherence in magnitude of SAR images.A new method of spatial unwrapping was presented which used the subsidence rates calculated on corner reflector(CR)points as constraints for PS network to perform the spatial unwrapping using the parametric adjustment method.The algorithm achieved the integration of CR data and PSInSAR algorithm.The colliery dense distributed area around Baisha reservoir was chosen as the study area in the experiment.The time series of subsidence from February in 2007 to February in 2010 is successfully inversed by using the periodic function to simulate the linear and nonlinear components of the deformation.The simulation results show that the accuracy can be±2.1 mm with the leveling data being used as the external validation data.
The subsidence of the mining area was monitored by analyzing the phase of permanent scatters (PS) which maintained high coherence in magnitude of SAR images.A hew method of spatial unwrapping was presented which used the subsidence rates calculated on comer reflector (CR) points as constraints for PS network to perform the spatial unwrapping using the parametric adjustment method.The algorithm achieved the integration of CR data and PSInSAR algorithm.The colliery dense distributed area around Baisha reservoir was chosen as the study area in the experiment.The time series of subsidence from February in 2007 to February in 2010 is successfully inversed by using the periodic function to simulate the linear and nonlinear components of the deformation.The simulation results show that the accuracy can be ± 2.1 mm with the leveling data being used as the external validation data.
基金
Project(2006AA12Z156)supported by the National High Technology Research and Development Program of China
Projects(40974006,40774003)supported by the National Natural Science Foundation of China
Project supported by Construct Program of the Key Discipline in Hunan Province,China
Projects(2011GK3106,2011SK3077)supported by Science and Technology Department of Hunan Province,China
关键词
时间序列
地面下沉
矿区
非线性元件
逆温
整合
PS网络
永久散射体
permanent scatters
comer reflector (CR)
constraint adjustment
mining subsidence
nonlinear deformation