1. Department of Earth Sciences, The University of Hong Kong, Hong Kong SAR, China.
2. Laboratory for Space Research, The University of Hong Kong, Hong Kong SAR, China.
3. High Altitude Observatory, National Center for Atmospheric Research, Boulder, CO, USA.
4. Geophysical Institute, University of Alaska Fairbanks, Fairbanks, AK, USA.
5. Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China.
6. LPAP, Space sciences, Technologies and Astrophysics Research (STAR), Institute Université de Liége (ULiége), Liége, Belgium.
7. Applied Physics Laboratory, Johns Hopkins University, Laurel, MD, USA.
8. O.J. Brambles Consulting, Preston, UK.
9. Thayer School of Engineering, Dartmouth College, Hanover, NH, USA.
10. Mullard Space Science Laboratory, University College London, Dorking, UK.
11. Gamera Consulting, Hanover, NH, USA.