ACIX II Metrics
The inter-comparison was performed separately for all the AC products, i.e. AOD, WV and SR, 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 was made only for the pixels that are considered of good quality by all or combinations of AC processors.