1. NASA Goddard Space Flight Center; Greenbelt Maryland USA
2. Department of Automatic Control and Systems Engineering; University of Sheffield; Sheffield UK
3. Space Sciences Laboratory; University of California; Berkeley California USA
4. Astronomy and Space Physics Department; Taras Shevchenko National University of Kiev; Kiev Ukraine
5. Department of Physics; Catholic University of America; Washington District of Columbia USA
6. Earth and Planetary Sciences; Tokyo Institute of Technology; Tokyo Japan