1. Univ. Lille, CNRS, UMR 8518 ‐ LOA ‐ Laboratoire d’Optique Atmosphérique Lille France
2. Department of Atmospheric Sciences University of Utah Salt Lake City UT USA
3. Institute of Meteorology and Climate Research Karlsruhe Institute of Technology Karlsruhe Germany
4. NASA Langley Research Center Hampton VA USA