1. School of Physical Sciences The Open University Milton Keynes UK
2. Space Science and Technology Department Science and Technology Facilities Council Rutherford Appleton Laboratory Oxfordshire UK
3. Space Science Institute Boulder CO USA
4. NASA Goddard Space Flight Center Greenbelt MD USA
5. Center for Research and Exploration in Space Science and Technology II University of Maryland College Park MD USA
6. Royal Belgian Institute for Space Aeronomy BIRA‐IASB Brussels Belgium
7. LPAP STAR Institute Université de Liège Liège Belgium
8. Institute of Condensed Matter and Nanosciences Université catholique de Louvain Louvain‐la‐Neuve Belgium
9. Istituto di Astrofisica e Planetologia Spaziali, IAPS‐INAF Rome Italy
10. Instituto de Astrofisica de Andalucia IAA‐CSIC, Glorieta de la Astronomia Granada Spain