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; Noordwijk Netherlands
3. Institut de Recherche en Astrophysique et Planétologie; Toulouse France
4. Istituto Nazionale di Astrofisica, Istituto di Astrofisica e Planetologia Spaziali; Rome Italy
5. Instituto de Astrofísica de Andalucía, CSIC; Granada Spain
6. Department of Climate and Space Sciences and Engineering; University of Michigan; Ann Arbor MI USA