1. Science Systems and Applications, Inc. Lanham MD USA
2. NASA Goddard Space Flight Center Greenbelt MD USA
3. Institute of Chemistry and Dynamics of the Geosphere: Troposphere Research Centre Jülich Jülich Germany
4. Earth Observing Laboratory National Center for Atmospheric Research Boulder CO USA
5. Laboratoire de l'Atmosphère et des Cyclones UMR8105, Université, Météo‐France, CNRS La Réunion France
6. Federal Office of Meteorology and Climatology MeteoSwiss Payerne Switzerland