Time series ground subsidence inversion in mining area based on CRInSAR and PSInSAR integration
来源期刊：中南大学学报(英文版)2013年第9期
论文作者：XING Xue-min(邢学敏) ZHU Jian-jun(朱建军) WANG Yong-zhe(王永哲) YANG Ya-fu(杨亚夫)
文章页码：2498 - 2509
Key words：permanent scatters; corner reflector (CR); constraint adjustment; mining subsidence; nonlinear deformation
Abstract: 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.
XING Xue-min(邢学敏)1, 2, ZHU Jian-jun(朱建军)1, WANG Yong-zhe(王永哲)1, YANG Ya-fu(杨亚夫)1
(1. School of Info-Physics and Geomatics Engineering, Central South University, Changsha 410083, China;
2. School of Traffic and Transportation Engineering, Changsha University of Science and Technology,
Changsha 410004, China)
Abstract: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.
Key words:permanent scatters; corner reflector (CR); constraint adjustment; mining subsidence; nonlinear deformation
