1. State Key Laboratory of Geodesy and Earth's Dynamics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan, China
2. Division of Geodetic Science, School of Earth Sciences, The Ohio State University, Columbus, OH, USA
3. National Engineering Research Center for Geoinformatics Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, China
4. Center for Space Research, University of Texas at Austin, Austin, TX, USA
5. Department of Geomatics Engineering, College of Surveying and Geo-Informatics, Shandong Jianzhu University, Jinan, China