1. Laboratoire de Physique et Chimie de l’Environnement et de l’Espace (LPC2E), Université Orléans—CNRS—CNES, CEDEX 2, 45071 Orléans, France
2. International Space Science Institute, 3012 Bern, Switzerland
3. National Center for Atmospheric Research, Boulder, CO 80301, USA
4. Department of Chemistry and Atmospheric Science, Colorado State University, Fort Collins, CO 80523, USA
5. Department of Atmospheric Sciences, RSMAS, University of Miami, Miami, FL 33149, USA
6. Institute for Atmospheric Physics, Johannes Gutenberg University Mainz, Becherweg 21, 55128 Mainz, Germany
7. Department of Earth & Environmental Sciences, Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY 10964, USA
8. CNR—National Institute of Optics, Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy
9. Department of Earth and Planetary Sciences, Harvard University, Boston, MA 02138, USA
10. NASA Langley Research Center, Hampton, VA 23681, USA
11. Institute for Atmospheric and Environmental Science, Goethe University Frankfurt, 60323 Frankfurt am Main, Germany
12. Karlsruhe Institute of Technology, Institute of Meteorology and Climate Research, 76021 Karlsruhe, Germany
13. Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO 80309, USA
14. Global Monitoring Laboratory, NOAA, Boulder, CO 80305, USA
15. NASA, Earth Science Division, NASA HQ, Washington, DC 20546, USA
16. NASA Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91125, USA
17. Institute of Environmental Physics, University of Bremen, Otto-Hahn-Allee 1, 28359 Bremen, Germany
18. Department of Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, MI 48109, USA
19. CIMEL Electronique, 75011 Paris, France
20. Izaña Atmospheric Research Centre, 38001 Santa Cruz de Tenerife, Spain
21. Air Chemistry Department, Max Planck Institute for Chemistry, 55128 Mainz, Germany