1. NASA Goddard Spaceflight Center; Greenbelt Maryland USA
2. Institute for Astrophysics and Computational Sciences; Catholic University of America; Washington District of Columbia USA
3. Labordy Gwyddoniaeth y Gofod; Bron Dinas, Cricieth, Gwynedd UK
4. University of Maryland; College Park Maryland USA
5. University of Maryland, Baltimore County; Catonsville Maryland USA
6. Space Research Institute; Austrian Academy of Sciences; Graz Austria
7. Institutet för rymdfysik; Swedish Institute of Space Physics; Kiruna Sweden
8. The Johns Hopkins University Applied Physics Laboratory; Laurel Maryland USA