1. Key Laboratory of Earth and Planetary Physics Institute of Geology and Geophysics Chinese Academy of Sciences Beijing China
2. College of Earth and Planetary Sciences University of Chinese Academy of Sciences Beijing China
3. Department of Physics Lancaster University Lancaster UK
4. Department of Physics and Astronomy University College London London UK
5. Department of Earth Sciences University of Hong Kong Pokfulam China
6. Department of Physics University of Alaska Fairbanks Fairbanks AK USA
7. Southwest Research Institute San Antonio TX USA
8. Laboratoire de Physique Atmosphérique et Planétaire STAR Institute Université de Liège Liège Belgium