1. Space Science Center; University of New Hampshire; Durham New Hampshire USA
2. National Space Science Center; Chinese Academy of Sciences; Beijing China
3. Max-Planck-Institut für extraterrestrische Physik; Garching Germany
4. CESR/CNRS; Toulouse France
5. Space Sciences Division, SSTD; Rutherford Appleton Laboratory; Chilton, Didcot Oxfordshire UK