1. Space Environment Physics Group, School of Physics and Astronomy; University of Southampton; Southampton UK
2. Space Science and Technology Department; Rutherford Appleton Laboratory; Chilton UK
3. Space and Atmospheric Physics, Blackett Laboratory; Imperial College London; London UK
4. Space Science Division; Naval Research Laboratory; Washington D. C. USA
5. Space Research Institute; Austrian Academy of Sciences; Graz Austria
6. Johns Hopkins University Applied Physics Laboratory; Baltimore Maryland USA
7. Mullard Space Science Laboratory; University College London; Dorking UK
8. Institute of Mathematics and Physics; Aberystwyth University; Aberystwyth UK
9. Max-Planck-Insitut für Sonnensystemforschung; Katlenburg-Lindau Germany
10. Grupo de Astronomia y Ciencias del Espacio; Universidad de Valencia; Valencia Spain
11. Southwest Research Institute; San Antonio Texas USA