1. Department of Physics and Astronomy; University of Leicester; Leicester UK
2. Department of Physics; Lancaster University; Lancaster UK
3. Space Science and Engineering Center; University of Wisconsin-Madison; Madison Wisconsin USA
4. Lunar and Planetary Lab; University of Arizona; Tucson Arizona USA
5. Center for Space Physics; Boston University; Boston Massachusetts USA
6. Laboratory for Atmospheric and Space Physics; University of Colorado Boulder; Boulder Colorado USA
7. Blackett Laboratory; Imperial College London; London UK
8. Laboratoire de Physique Atmospherique et Planetaire; Universite de Liege; Liege Belgium
9. Department of Physics and Astronomy; University of Iowa; Iowa City Iowa USA
10. Applied Physics Laboratory; Johns Hopkins University; Laurel Maryland USA
11. Department of Science; Central Arizona College; Coolidge Arizona USA