Improving the Lunar Irradiance Model of ESA (LIME) Langley – Ratio calibration method Aerosol properties derived from COCCON ground-based Fourier Transform spectra Passive measurements of Aerosol Optical Depth (AOD) carried out with the CE376 lidar High-Altitude Pseudo-Satellites for Telecommunication and Complementary Space Applications (TELEO) AOD and water vapour from PANDORA photometer NEON Enhanced characterization of regional transported aerosols using a CIMEL CE376 elastic micro-LiDAR that provides depolarization at 532 and 808 nm Assessing the impact of aerosols in the optical telecommunication links availability using sun and lunar photometry at 1064 and 1550 nm (ANAtOLIA) Potential use of low-cost hand-held sunphotometers for operational activities (Calitoo) Measuring column spectral aerosol single scattering albedo at multiple wavelengths in the UV, visible, and near IR using multi-filter rotating shadow band radiometers (MFRSR’s) Installation of the new COSQM 2 version ESA Project: Maintenance of lunar photometer and lunar irradiance model (2020-2023)