1. Laboratory for Atmospheric and Climate Science (CIAC), CSIC; Toledo Spain
2. School of Chemistry; University of Leeds (UoL); Leeds UK
3. Indian Institute of Tropical Meteorology (IITM); Pune India
4. British Met Office; Exeter UK
5. Atmospheric Research and Instrumentation Branch; National Institute for Aerospace and Technology (INTA); Huelva Spain
6. Andalusian Centre for Environmental Research (CEAMA); University of Granada; Granada Spain
7. National Institute for Meteorology and Hydrology (INAMHI); Quito Ecuador
8. National Centre for Atmospheric Science; University of East Anglia (UEA); Norwich UK