1. Hubei LuoJia Laboratory, Wuhan, China
2. School of Geodesy and Geomatics, Wuhan University, Wuhan, China
3. Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan, China
4. Key Laboratory of Polar Environment Monitoring and Public Governance, Ministry of Education, Wuhan University, Wuhan, China
5. Division of Geodetic Science, School of Earth Sciences, Ohio State University, Columbus, USA