Examples of input spectra used in the grid retrievals for the nominal case (left: the lowest quality input with R = 20, S/N = 5; right: the highest quality input with R = 100, S/N = 20). In gray, we provide the full resolution petitRADTRANS Earth spectrum. The red step function represents the wavelength-binning of the input data. Further, the blue shaded region represents the uncertainty for the corresponding bin. We also mark the absorption features of the considered atmospheric gases.