1. School of Electronic and Communication Engineering Guiyang University Guiyang China
2. CAS Key Laboratory of Geospace Environment School of Earth and Space Sciences University of Science and Technology of China Hefei China
3. Southwest Research Institute San Antonio TX USA
4. Key Laboratory of Earth and Planetary Physics Institute of Geology and Geophysics Chinese Academy of Sciences Beijing China
5. State Key Laboratory of Marine Geology School of Ocean and Earth Science Tongji University Shanghai China
6. Institute of Meteorology and Oceanology National University of Defense Technology Nanjing China