1. Space Sciences LaboratoryUniversity of California Berkeley California USA
2. Department of Physics and AstronomyUniversity of Kansas Lawrence Kansas USA
3. Department of Physics and AstronomyUniversity of Iowa Iowa City Iowa USA
4. Laboratory for Atmospheric and Space PhysicsUniversity of Colorado Boulder Boulder Colorado USA
5. NASA Goddard Space Flight Center Greenbelt Maryland USA
6. IRAP/CNRS Toulouse France