1. Tianjin Navigation Instrument Research Institute, Tianjin, People’s Republic of China
2. Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics Chinese Academy of Sciences, Beijing, People’s Republic of China
3. Faculty of Geomatics, Lanzhou Jiaotong University, Lanzhou, People’s Republic of China
4. Information Center of Geology and mineral resources in Henan Province, Zhengzhou, Henan, People’s Republic of China