1. Department of Geophysics and Space Sciences Eotvos University Budapest Hungary
2. Research Centre for Astronomy and Earth Sciences Hungarian Academy of Sciences Sopron Hungary
3. British Antarctic Survey (NERC) Cambridge UK
4. Department of Physics University of Otago Dunedin New Zealand
5. Space Science Directorate South African National Space Agency Hermanus South Africa
6. Institute of Cosmophysical Research and Radio Wave Propagation Far Eastern Branch of the Russian Academy of Sciences Paratunka Russia
7. Sodankylä Geophysical Observatory University of Oulu Oulu Finland
8. Belgian Institute for Space Aeronomy Brussels Belgium
9. Department of Electrical and Computer Engineering University of Florida Gainesville FL USA