1. Space Sciences Laboratory; University of California, Berkeley; Berkeley California USA
2. Department of Physics and Astronomy; University of Delaware; Newark Delaware USA
3. Solar-Terrestrial Physics Group; Institute of Space and Astronautical Science; Sagamihara Kanagawa Japan
4. Swedish Institute of Space Physics; Uppsala Sweden
5. Geospace Physics Branch, Laboratory for Solar and Space Physics, NASA Goddard Space Flight Center; Greenbelt Maryland USA
6. Space and Atmospheric Physics, The Blackett Laboratory; Imperial College London; London UK
7. CESR-CNRS/UPS; Toulouse France