1. Cooperative Programs for the Advancement of Earth System Science University Corporation for Atmospheric Research Boulder CO USA
2. Geophysical Institute University of Alaska, Fairbanks Fairbanks AK USA
3. Department of Physics Imperial College London London UK
4. Department of Physics and Astronomy University of Turku Turku Finland
5. Department of Earth, Planetary, and Space Sciences University of California, Los Angeles Los Angeles CA USA
6. Space Science Institute Boulder CO USA
7. Space Research Institute Austrian Academy of Sciences Graz Austria