Star photometry with all-sky cameras to retrieve aerosol optical depth and clouds Intercomparison of spectrorradiometers and sun photometer for the determination of the aerosol optical depth COSMO Site and Design Advancement (COSADA) PACE: Plankton, Aerosol, Cloud, and Ocean Ecosystem Study on Extreme Aerosol Events of desert and volcanic origin in the tropical & subtropical North Atlantic AOD and water vapour from PANDORA photometer Incorporation of sky measurements at 340 nm for CIMEL-AERONET Enhanced characterization of regional transported aerosols using a CIMEL CE376 elastic micro-LiDAR that provides depolarization at 532 and 808 nm Potential use of low-cost hand-held sunphotometers for operational activities (Calitoo) : Tamanrasset Installation of the new COSQM 2 version
