1. Service d'Aéronomie du CNRS, Institut Pierre-Simon Laplace; Université Pierre et Marie Curie; Paris France
2. Institut für Physik der Atmosphäre; Deutsches Zentrum für Luft- und Raumfahrt; Wessling Germany
3. Centre for Atmospheric Science, Department of Chemistry; University of Cambridge; Cambridge UK
4. Department of Meteorology; University of Reading; Reading UK
5. School of Earth and Environment; University of Leeds; Leeds UK
6. Norwegian Institute for Air Research; Kjeller Norway
7. School of Environmental Science; University of East Anglia; Norwich UK
8. Atmospheric Science Division; NASA Langley Research Center; Hampton Virginia USA
9. Department of Chemistry; University of California; Irvine California USA