1. State Key Laboratory of Geodesy and Earth's Dynamics; Institute of Geodesy and Geophysics, Chinese Academy of Sciences; Wuhan 430077 China
2. MOE Key Laboratory of Fundamental Physical Quantities Measurement, School of Physics; Huazhong University of Science and Technology; Wuhan 430074 China
3. Collaborative Innovation Center of Geospatial Technology; Wuhan University; Wuhan China
4. School of Geodesy and Geomatics; Wuhan University; Wuhan 430079 China