1. Northwest Research Associates Inc. Boulder CO USA
2. School of Earth and Space Exploration Arizona State University Tempe AZ USA
3. Laboratory for Atmospheric and Space Physics University of Colorado Boulder Boulder CO USA
4. Leibniz Institute of Atmospheric Physics at the University of Rostock Kühlungsborn Germany
5. Jülich Supercomputing Centre Forschungszentrum Jülich GmbH Jülich Germany