Posterior probability distributions of the model parameters for several combinations of observations of the no-cloud atmospheric configuration, as described in Sect. 3.2. Blue lines indicate the combination (37°+85°), red lines, (37°+123°), and black lines, (37°+85°+123°). For reference, cyan lines indicate the results of a single-phase observation at α = 37° but doublingthe S∕N to 20). Green lines mark the true values of the model parameters (see Sect. 3.1) for this observation. Two-dimensional subplots show the correlations between pairs of parameters. Contour lines correspond to the 1 σ confidence levels.