Accuracy of retrieved parameters, showing individual parameters on the x-axis and accuracy calculated based on the 3σ-equivalent centred credible interval on the y-axis. The top two panels represent retrievals performed on a synthetic spectrum generated under the DRS noise assumption, while the bottom two panels show the same for the optimistic noise case. (Left) Results for retrievals performed on a synthetic spectrum generated with the inverse input p–T profile. (Right) Same, but for a synthetic spectrum generated with the monotonic p–T profile. In all panels, the reported accuracy values are colour-coded by the p-T profile used in the retrieval. The black dashed lines denote the boundaries of the 3σ CCI, and associated accuracy values of |Δθ_p| > 5.0 are cut off for visualisation purposes.