Estimation of the spectral resolution in the both channels
The spectral resolution is defined as R = λ/Δλ and is estimated automatically during the calculation of the
wavelength solution. Here, the ThAr spectra are used from both calibation sets (Evening
and morning calibrations). To optimise the figure, only data are plotted into the range form R=15000 to R=25000. Furthermore, the residuals of the wavelength solution in [m/s] are shown.