Comparison of the cumulative distribution functions of the CH₄ posteriors (left corner plot) and the O₃ posteriors (right corner plot) for all the combinations of the clear sky scenarios (MOD-CF, NOE-CF, GOE-CF, and PRE-CF). The retrieved posteriors for each scenario are shown on the diagonal. Following the color scheme in Table 1, we show the posteriors and cumulative distribution functions as: solid blue lines (MOD-CF); dotted red lines (NOE-CF); dashed green lines (GOE-CF); and dash-dotted purple lines (PRE-CF).