1. Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, USA.
2. Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, USA.
3. Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA, USA.
4. NOAA Chemical Sciences Laboratory, Boulder, CO, USA.
5. Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, USA.
6. Department of Chemistry, University of Colorado Boulder, Boulder, CO, USA.
7. NASA Langley Research Center, Hampton, VA, USA.
8. Institute of Arctic and Alpine Research, University of Colorado Boulder, Boulder, CO, USA.
9. National Institute of Aerospace, Hampton, VA, USA.
10. Atmospheric Chemistry Observations & Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO, USA.
11. Atmospheric Chemistry and Dynamics Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, USA.
12. Joint Center for Earth Systems Technology, University of Maryland, Baltimore County, Baltimore, MD, USA.
13. Department of Earth, Ocean, and Atmospheric Science, Florida State University, Tallahassee, FL, USA.
14. School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, USA.
15. Universities Space Research Association, Columbia, MD, USA.
16. Department of Atmospheric Science, Colorado State University, Fort Collins, CO, USA.
17. U.S. Naval Research Laboratory, Monterey, CA, USA.
18. Department of Chemistry, University of Oslo, Oslo, Norway.
19. IONICON Analytik GmbH, Innsbruck, Austria.
20. Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Innsbruck, Austria.
21. Graduate School of Nanobioscience, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama, Kanagawa, Japan.
22. Department of Chemistry and Biochemistry, University of Montana, Missoula, MT, USA.