1. Institut für Energie and Klimaforschung: Stratosphäre (IEK-7); Forschungszentrum Jülich; Jülich Germany
2. Atmospheric Chemistry Division; National Center for Atmospheric Research; Boulder Colorado USA
3. Center for Limb Atmospheric Sounding; University of Colorado at Boulder; Boulder Colorado USA
4. NorthWest Research Associates; Socorro New Mexico USA
5. New Mexico Institute of Mining and Technology; Socorro New Mexico USA