1. Jet Propulsion Laboratory; California Institute of Technology; Pasadena California USA
2. Southwest Research Institute; San Antonio Texas USA
3. Department of Physics and Astronomy; University of Leicester; Leicester UK
4. Space Environment Laboratory; National Institute of Information and Communications Technology; Tokyo Japan
5. Institute for Space Astrophysics and Planetology; Rome Italy
6. Mullard Space Science Laboratory; University College London; London UK
7. Space Science Institute; Boulder Colorado USA
8. Atmospheric, Oceanic and Planetary Physics; University of Oxford; Oxford UK