Fig. 1
Model optical transmittance computed for Cerro Paranal with the LBLRTM code (see Sect. 5) for one airmass. The main extinction components are identified. The scale to the right refers to the ozone and aerosol components only. For presentation the model has been convolved with a Gaussian profile (FWHM = 12 Å). The curves on the top panel trace the normalised UBVRI Johnson-Cousins passbands.
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