1. School of Geomatics Science and Technology, Nanjing Tech University, Nanjing, China
2. Division of Geodetic Science, School of Earth Sciences, Ohio State University, Columbus, OH, USA
3. State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan, China
4. Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan, China