1. Department of Physics and Astronomy; University of Calgary; Calgary, Alberta Canada
2. Space Science Applications Laboratory; Aerospace Corporation; El Segundo California USA
3. Department of Arctic Geophysics; University Centre in Svalbard; Longyearbyen Norway
4. Space Weather Laboratory; NASA Goddard Space Flight Center; Greenbelt Maryland USA
5. Institut für Experimentelle und Angewandte Physik; Christian-Albrechts-Universität zu Kiel; Kiel Germany
6. Department of Physics and Astronomy; University of Leicester; Leicester UK