1. Institute of Physics University of Graz Graz Austria
2. Space Research Institute Austrian Academy of Sciences Graz Austria
3. Institut für Geophysik und extraterrestrische Physik TU Braunschweig Braunschweig Germany
4. Hvar Observatory, Faculty of Geodesy University of Zagreb Zagreb Croatia
5. Heliophysics Science Division NASA Goddard Space Flight Center Greenbelt MD USA
6. The Blackett Laboratory Imperial College London London UK