1. Radio and Space Plasma Physics Group, Department of Physics and Astronomy; University of Leicester; Leicester UK
2. European Space Agency, ESTEC-Scientific Support Office, Keplerlaan 1; Noordwijk Netherlands
3. Space Sciences Laboratory; University of California; Berkeley CA USA
4. LATMOS/IPSL, UPMC University Paris 06 Sorbonne Universités, UVSQ, CNRS; Paris France
5. Institut de Recherche en Astrophysique et Planétologie; Toulouse France
6. European Space Agency, ESAC, Villanueva de la Cañada; Madrid Spain
7. NASA Goddard Space Flight Center; Greenbelt MD USA
8. Jet Propulsion Laboratory; Pasadena CA USA