1. Department of Atmospheric, Oceanic, and Space Sciences, University of Michigan, Ann Arbor, Michigan.
2. Laboratory for Extraterrestrial Physics, NASA Goddard Space Flight Center, Greenbelt, Maryland.
3. Space Sciences Laboratory, University of California, Berkeley, California.
4. Geophysical Institute, University of Alaska, Fairbanks, Alaska.
5. Department of Electrical and Computer Engineering, Duke University, Durham, North Carolina.
6. SETI Institute, Mountain View, California.
7. Southwest Research Institute, Boulder, Colorado.
8. Department of Atmospheric Sciences/Astrobiology Program, University of Washington, Seattle, Washington.
9. Department of Earth Sciences, University of Bristol, Bristol, United Kingdom.