1. Institute for Space‐Earth Environmental ResearchNagoya University Nagoya Japan
2. Sodankylä Geophysical ObservatoryUniversity of Oulu Sodankylä Finland
3. Department of PhysicsUniversity of Otago Dunedin New Zealand
4. British Antarctic Survey Cambridge UK
5. Department of Arctic GeophysicsUniversity Centre in Svalbard Longyearbyen Norway
6. Birkeland Centre for Space Science Bergen Norway
7. Finnish Meteorological Institute Helsinki Finland