1. Cooperative Institute for Research in Environmental Sciences University of Colorado Boulder Boulder CO USA
2. Department of Aerospace Engineering Sciences University of Colorado Boulder Boulder CO USA
3. Department of Physics and Astronomy Clemson University Clemson SC USA
4. Laboratory for Atmospheric and Space Physics University of Colorado Boulder Boulder CO USA
5. Leibniz Institute of Atmospheric Physics University of Rostock Kühlungsborn Germany
6. DLR Oberpfaffenhofen Institute für Physik der Atmosphäre Oberpfaffenhofen Germany