1. Physikalisches Institut, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland
2. Center for Space and Habitability, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland
3. LATMOS 4 Avenue de Neptune F-94100 SAINT-MAUR, France
4. Space Science Division, Southwest Research Institute, 6220 Culebra Road, San Antonio, TX 78228, USA
5. University of Texas at San Antonio, 1 UTSA Circle, San Antonio, TX 78249, USA
6. Max Planck Institute for Solar system Research, Justus von Liebig Weg 3, D-37077 Göttingen, Germany
7. Department of Atmospheric, Oceanic and Space Sciences, University of Michigan, 2455 Hayward, Ann Arbor, MI 48109, USA
8. Belgian Institute for Space Aeronomy, BIRA-IASB, Ringlaan 3, B-1180 Brussels, Belgium
9. Department of Physical Sciences, The Open University, Walton Hall, Milton Keynes MK7 6AA, UK
10. Science Support Office, European Space Research and Technology Centre, European Space Agency, NL-2201 AZ Noordwijk, the Netherlands