1. Cooperative Institute for Research in Environmental Sciences University of Colorado Boulder CO USA
2. NOAA Chemical Sciences Laboratory Boulder CO USA
3. Royal Netherlands Meteorological Institute De Bilt The Netherlands
4. LATMOS Sorbonne Université‐UVSQ‐CNRS/INSU Paris France
5. IAGOS‐AISBL Brussels Belgium
6. Jet Propulsion Laboratory California Institute of Technology Wrightwood CA USA
7. Royal Meteorological Institute of Belgium Uccle Belgium
8. Laboratoire d’Aérologie CNRS and Université de Toulouse III Toulouse France
9. NOAA Global Monitoring Laboratory Boulder CO USA
10. Deutscher Wetterdienst Hohenpeissenberg Germany
11. Federal Office of Meteorology and Climatology MeteoSwiss Payerne Switzerland
12. Environment and Climate Change Canada Toronto ON Canada
13. Izaña Atmospheric Research Center AEMET Tenerife Spain