1. Laboratory for Atmospheric and Space PhysicsUniversity of Colorado Boulder Boulder CO USA
2. Department of Atmospheric and Oceanic SciencesUniversity of Colorado Boulder Boulder CO USA
3. Leibniz Institute of Atmospheric Physics Kühlungsborn Germany
4. National Center for Atmospheric Research Boulder CO USA
5. GATS, Inc. Boulder CO USA
6. Massachusetts Institute of Technology Haystack Observatory Westford MA USA