External links to GRASP projects:

DARIUS S5p (ESA): https://eo4society.esa.int/projects/sentinel-5p-innovation-aod-brdf

PRISMA (ESA):  https://eo4society.esa.int/projects/prisma

HARPOL (ESA): https://eo4society.esa.int/projects/harpol ; https://www.sron.nl/harpol

DIVA (ESA): http://diva.inoe.ro

3MI-Optimisation (EUMETSAT): https://www.eumetsat.int/3MI-aerosol-retrieval

CO2M (EUMETSAT) : https://www.eumetsat.int/CO2M-aerosol-level-2