Inter-Comparison Metrics

The inter-comparison is performed separately for all the atmospheric correction products, i.e. Aerosol Optical Depth, Water Vapour and Surface Reflectance, and on image subsets of 9 km x 9 km centred on the AERONET Sunphotometer station of every test site. For all the experimental instances, the participants were encouraged to submit additionally the quality flags at pixel level, indicating the quality assured pixel to be involved in the analysis. The inter-comparison is made only for the pixels that are considered of good quality by all or combinations of processors.