1. ESTEC, European Space Agency; Noordwijk Netherlands
2. IRAP (CNRS-UPS); University of Toulouse; Toulouse France
3. Institute of Experimental and Applied Physics; University of Kiel; Kiel Germany
4. Space Research Group; University of Alcala; Alcala de Henares Spain
5. Max-Planck-Institut für Sonnensystemforschung; Göttingen Germany
6. EOS; University of New Hampshire; Durham New Hampshire USA
7. SSL; University of California; Berkeley California USA
8. Johns Hopkins University Applied Physics Laboratory; Laurel Maryland USA