1. NASA Langley Research Center; Hampton Virginia USA
2. Universities Space Research Association; Columbia Maryland USA
3. Laboratoire d'Optique Atmospherique; CNRS-Universite de Lille; Villeneuve d'Ascq France
4. Science Systems and Applications, Inc.; Lanham Maryland USA
5. Institute of Ion Physics and Applied Physics; University of Innsbruck; Innsbruck Austria
6. Department of Chemistry; University of Oslo; Oslo Norway