Ozone study
According to the current DPPS requirements, no ozone calibration is foreseen. However according to the uncertainty budget for CTAO science performance, the systematic uncertainty introduced by ozone daily variations in energy resolution should be < 1%. If it is > 1%, ozone extinction calibration will be required. There is an ongoing study, related to redmine issue 52591.
The outcome of the study should show whether daily/seasonal ozone calibration is required, and in case of seasonal, if seasonal variations of ozone follow seasonal variations of the molecular profile.