1. Cooperative Institute for Research in Environmental Sciences; University of Colorado; Boulder Colorado USA
2. Aeronomy Laboratory; National Oceanic and Atmospheric Administration; Boulder Colorado USA
3. Institut für Physik der Atmosphäre; Deutsches Zentrum für Luft- and Raumfahrt Institut für Physik der Atmosphäre; Wessling Germany
4. Atmospheric Chemistry Division; National Center for Atmospheric Research; Boulder Colorado USA
5. Universidad Nacional Autonoma de Mexico; Centro de Ciencias de la Atmosfera, Ciudad Universitaria; Mexico City Mexico
6. Department of Meteorology; University of Utah; Salt Lake City Utah USA
7. Atmospheric Research Project; Harvard University; Cambridge Massachusetts USA
8. Division of Geology and Planetary Sciences; California Institute of Technology; Pasadena California USA
9. NASA Ames Research Center; Moffett Field California USA
10. Jet Propulsion Laboratory; California Institute of Technology; Pasadena California USA