1. EISCAT Scientific Association; Ramfjordbotn Norway
2. Department of Physics and Technology; University of Tromsø - The Arctic University of Norway; Tromsø Norway
3. Formerly at Department of Physics; Lancaster University; Lancaster UK
4. EISCAT Scientific Association; Sodankylä Finland
5. Sodankylä Geophysical Observatory; University of Oulu; Oulu Finland
6. EISCAT Scientific Association; Kiruna Sweden