1. School of Smarty City, Chongqing Jiaotong University, Chongqing, China
2. School of Geodesy and Geomatics and the Key Laboratory of Geospace Environment and Geodesy, Ministry of Education, Wuhan University, Wuhan, China
3. Hubei Luojia Laboratory and the School of Geodesy and Geomatics, Wuhan University, Wuhan, China
4. School of Geodesy and Geomatics, Wuhan University, Wuhan, China
5. Chongqing Key Laboratory of Spatio-Temporal Information in Mountain Cities, Chongqing, China