1. Environment Canada; Toronto Ontario Canada
2. Laboratory for Atmospheric Chemistry and Dynamics; NASA Goddard Space Flight Center; Greenbelt Maryland USA
3. Department of Atmospheric and Oceanic Sciences; University of Maryland; College Park Maryland USA
4. Deutsches Zentrum für Luft- und Raumfahrt; Wessling Germany
5. Belgian Institute for Space Aeronomy (BIRA-IASB); Brussels Belgium
6. Department of Physics and Atmospheric Science; Dalhousie University; Halifax Nova Scotia Canada
7. Harvard-Smithsonian Center for Astrophysics; Cambridge Massachusetts USA
8. National Institute of Meteorological Research; Korea Meteorological Administration; Seoul South Korea