1. State Key Laboratory of Surveying, Mapping and Remote Sensing information engineering, Wuhan University, Wuhan, China
2. Mobile Broadcasting and Information Service Industry Innovation Research Institute (Wuhan) Co, Ltd, Ezhou, China
3. School of Intelligent Science and Engineering, Harbin Engineering University, Harbin, China
4. School of Geodesy and Geomatics, Wuhan University, Wuhan, China