1. NASA Goddard Space Flight Ctr. (United States)
2. Wyle Information Systems, Inc. (United States)
3. Universities Space Research Association (United States)
4. Ctr. for Research and Exploration in Space Science and Technology (United States)
5. Stinger-Ghaffarian Technologies (United States)
6. National Institute of Standards and Technology (United States)
7. Stanford Univ. (United States)
8. SRON Netherlands Institute for Space Research (Netherlands)
9. Institut de Recherche en Astrophysique et Planétologie (France)