1. School of Geodesy and Geomatics Wuhan University Wuhan China
2. State Key Laboratory of Geodesy and Earth's Dynamics Innovation Academy for Precision Measurement Science and Technology CAS Wuhan China
3. Collaborative Innovation Center for Geospatial Technology Wuhan China
4. Department of Surveying Engineering Shoubra Faculty of Engineering Benha University Benha Egypt
5. State Key Laboratory of Information Engineering in Surveying Mapping and Remote Sensing Wuhan University Wuhan China