Applying the “classical” calibration scheme that is currently in use at the 100-m telescope (for online display purposes), using Eq. (27), we obtain the reduced spectra (upper row). The input spectra T_input (green) are also shown for reference. Not only are the flux values of the Gaussians improperly reconstructed, which becomes visible after baseline subtraction (lower row), the inferred continuum fluxes of the source are also incorrect. The left panels show the results for the simpler case, while the right panels includes the standing wave contribution.