1. Atmospheric and Space Technology Research Associates Louisville CO USA
2. NASA Goddard Space Flight Center Greenbelt MD USA
3. Previously at Department of Physics The Catholic University of America Washington DC USA
4. Space Science Directorate South African National Space Agency Hermanus South Africa
5. Department of Physics and Electronics Rhodes University Grahamstown South Africa
6. Department of Planetology and Space Sciences University of Paris Diderot Paris France
7. Space Science Application Laboratory The Aerospace Corporation El Segundo CA USA
8. Haystack Observatory Massachusetts Institute of Technology Westford MA USA
9. NASA Marshall Space Flight Center Huntsville AL USA