Land subsidence monitoring and prediction in Beijing based on multi-sensor InSAR and improved Gray-Markov model

Yinghai Ke1, Zeng Deng2, Huili Gong3, Lin Guo2 and Xiaojuan Li4, (1)Capital Nornal University, Beijing, China, (2)CNU Capital Nornal University, Beijing, China, (3)CNU Capital Nornal University, College of Resource Environment and Tourism, Beijing, China, (4)Capital Normal University, Beijing, China