1. Universities Space Research Association; Columbia MD USA
2. NASA Goddard Space Flight Center; Greenbelt MD USA
3. Institute for Meteorology, Faculty of Physics and Earth Sciences; University of Leipzig; Leipzig Germany
4. Earth System Science Interdisciplinary Center; University of Maryland; College Park MD USA
5. Laboratoire d'Optique Atmosphérique, UMR 8518; Université Lille 1; Villeneuve d'Ascq France
6. Laboratoire de Météorologie Physique, UMR 6016; Université Blaise Pascal; Clermont Ferrand France