1. Space Sciences Laboratory, University of California, Berkeley, Berkeley, California.
2. Laboratory for Extraterrestrial Physics, NASA Goddard Space Flight Center, Greenbelt, Maryland.
3. Department of Atmospheric, Oceanic, and Space Sciences, University of Michigan, Ann Arbor, Michigan.
4. Department of Electrical and Computer Engineering, Duke University, Durham, North Carolina.
5. Geophysical Institute, University of Alaska, Fairbanks, Alaska.
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.