1. Space Science Division; Naval Research Laboratory; Washington District of Columbia USA
2. Computational Physics, Inc.; Springfield Virginia USA
3. Laboratory for Atmospheric and Space Physics; University of Colorado at Boulder; Boulder Colorado USA
4. LATMOS; CNRS/UPMC/UVSQ; Paris France
5. Lunar and Planetary Laboratory; University of Arizona; Tucson Arizona USA
6. Center for Space Physics; Boston University; Boston Massachusetts USA
7. Department of Atmospheric, Oceanic and Space Sciences; University of Michigan; Ann Arbor Michigan USA