1. Atmospheric Chemistry Division, National Center for Atmospheric Research; Boulder Colorado USA
2. Laboratory for Atmospheric and Space Physics; University of Colorado Boulder; Boulder Colorado USA
3. NASA Langley Research Center; Hampton Virginia USA
4. Instituto de Astrofisica de Andalucía; Granada Spain
5. GATS, Inc.; Driggs Idaho USA
6. Forschungszentrum Jülich; Jülich Germany
7. Finnish Meteorological Institute; Helsinki Finland
8. Department of Earth and Space Science and Engineering; York University; Toronto Ontario Canada
9. Also at Department of Atmospheric and Oceanic Sciences; University of Colorado Boulder; Boulder Colorado USA
10. Center for Atmospheric Sciences; Hampton University; Hampton Virginia USA
11. Department of Physics; University of Toronto; Toronto Ontario Canada
12. Research Institute for Sustainable Humanosphere; Kyoto University; Uji Japan
13. Space Physics Research Laboratory; University of Michigan; Ann Arbor Michigan USA
14. Japan Aerospace Exploration Agency; Sagamihara Japan