1. Space Sciences Laboratory, University of California, Berkeley
2. Massachusetts Institute of Technology
3. University of Michigan
4. Jet Propulsion Laboratory - California Institute of Technology
5. University of Idaho
6. University of Maryland at College Park
7. Georgia Institute of Technology
8. Mullard Space Science Laboratory - University College London
9. Lunar and Planetary Laboratory - University of Arizona
10. NASA Goddard Space Flight Center
11. University of Southampton
12. University of Central Florida
13. Princeton University
14. University of Iowa