1. SRON Netherlands Institute for Space Research Utrecht Netherlands
2. Joint Center for Earth Systems TechnologyUniversity of Maryland, Baltimore County Catonsville Maryland USA
3. Department of Physical and Chemical SciencesUniversity of L'Aquila L'Aquila Italy
4. CETEMPS, University of L'Aquila L'Aquila Italy
5. Center for International Climate and Environmental Research ‐ Oslo Oslo Norway
6. KNMI Royal Netherlands Meteorological Institute De Bilt Netherlands
7. Norwegian Meteorological Institute Oslo Norway
8. Research Institute for Applied MechanicsKyushu University Fukuoka Japan
9. Pacific Northwest National Laboratory, Richland Washington USA
10. Max Planck Institute for Meteorology Hamburg Germany