1. Space Sciences Laboratory; University of California; Berkeley California USA
2. Institute of Geophysics and Planetary Physics; University of California; Los Angeles California USA
3. Deptartment of Atmosphere, Oceanic and Space Sciences; University of Michigan; Ann Arbor Michigan USA
4. Laboratory for Atmospheric and Space Physics; University of Colorado Boulder; Boulder Colorado USA
5. LATMOS, UVSQ; Guyancourt France
6. Department of Physics and Astronomy; University of Iowa; Iowa City Iowa USA
7. NASA Goddard Space Flight Center; Greenbelt Maryland USA