1. Institute of Space Physics and Applied Technology Peking University Beijing China
2. Polar Research Institute of China Shanghai China
3. GFZ German Research Centre for Geosciences Helmholtz Centre Potsdam Potsdam Germany
4. Denali Scientific Fairbanks AK USA
5. Department of Earth and Space Sciences University of California Los Angeles CA USA
6. Department of Astrophysical and Planetary Sciences University of Colorado Boulder Boulder CO USA
7. Department of Space and Plasma Physics KTH Royal Institute of Technology Stockholm Sweden