1. Laboratoire de Physique Atmosphérique et Planétaire, Space sciences, Technologies and Astrophysics Research Institute; Université de Liège; Liège Belgium
2. Department of Physics; Lancaster University; Lancaster UK
3. Office of Space Research and Technology; Academy of Athens; Athens Greece
4. Institute of Astronomy, Astrophysics, Space Applications and Remote Sensing; National Observatory of Athens; Athens Greece
5. UCL Mullard Space Science Laboratory; Dorking UK
6. Max Planck Institute for Solar System Research; Göttingen Germany
7. Department of Physics and Astronomy; University of Iowa; Iowa City IA USA
8. Geophysical Institute; University of Alaska Fairbanks; Fairbanks AK USA
9. Institute of Geology and Geophysics; Chinese Academy of Sciences; Beijing China
10. School of Earth and Space Sciences; Peking University; Beijing China
11. Southwest Research Institute; San Antonio TX USA
12. The Johns Hopkins University Applied Physics Laboratory; Laurel MD USA
13. Faculty of Natural Sciences, Department of Physics; Imperial College London; London UK