1. National Optical Astronomy Observatories, Tucson, AZ 85719
2. Cornell University, Ithaca, NY 14853
3. NASA Ames Research Center, Moffet Field, CA 94035
4. California Institute of Technology, Pasadena, CA 91125
5. Jet Propulsion Laboratory, Pasadena, CA 91109
6. ITRES Research Ltd., Calgary, Canada, T2E 7H7
7. United States Geological Survey, Menlo Park, CA 94025
8. Planetary Science Institute, Science Applications International Corporation, Tucson, AZ 85f7P19
9. RAND Corporation, Santa Monica, CA 90406
10. Institute for Geophysics, Honolulu, HI 96822
11. Arizona State University, Tempe, AZ 85281
12. University of Arizona, Tucson, AZ 85721
13. Brown University, Providence, RI 02912
14. Deutsche Luft und Raumfahrt, 8031 Oberpfaffenhofen, Federal Republic of Germany
15. NASA Headquarters, Washington, DC 20546