Summary of the validation retrieval on a synthetic test spectrum. Top right: Best-fit spectrum (green) compared to the input spectrum (black), including their residuals (bottom panel). Middle right: Retrieved P-T profile (green) compared to the input P-T profile (purple). Bottom left: Retrieved posterior distributions of the free parameters. Parameter names in the titles on the diagonal, with the retrieved values underneath, and the input value (signified with “in:”) underneath.