1. Department of Physics University of Toronto Toronto ON Canada
2. Space Dynamics Laboratory Utah State University North Logan UT USA
3. Jet Propulsion Laboratory California Institute of Technology Pasadena CA USA
4. Division of Geological and Planetary Sciences California Institute of Technology Pasadena CA USA
5. Atmospheric Chemistry Observations and Modeling National Center for Atmospheric Research Boulder CO USA
6. NASA Ames Research Center Mountain View CA USA
7. Division of Engineering and Applied Science California Institute of Technology Pasadena CA USA