1. Sodankylä Geophysical Observatory; University of Oulu; Sodankylä Finland
2. IRAP, Université de Toulouse, CNRS, UPS, CNES; Toulouse France
3. Department of Arctic Geophysics; University Centre in Svalbard; Longyearbyen Norway
4. Birkeland Centre for Space Science; Bergen Norway
5. Department of Physics and Technology; University of Tromsø; Tromsø Norway
6. Space Environment Physics; University of Southampton; Southampton UK
7. Institute for Space-Earth Environmental Research; Nagoya University; Nagoya Japan