Estimations of the effect of modern ozone absorption cros-ssections data on calculation of the atmospheric transmission and fluxes, measured using Sun photometers in the UV spectral region, are made. The ozone absorption cross-sections, often used in radiative codes, and new data of Serdyuchenko et al. are considered.
The atmospheric solar spectra are calculated using different spectroscopic databases of H<sub>2</sub>O absorption line parameters in the temperature and humidity range observed in the mid-latitudes. A comparison of the simulated spectra and measured high-resolution atmospheric spectra in the near-infrared water vapor bands, is carried out. It is shown that the values of H<sub>2</sub>O atmospheric column, retrieved using different modern spectroscopic databases may vary by more than 3%.
The sulfur dioxide absorption cross sections, measured with a Fourier transform spectrometer at room temperature and varied pressure of SO<sub>2</sub>-N<sub>2</sub> in the 260-330 μm region, are presented. The absorption spectra are obtained at a high spectral resolution of 0.5 cm<sup>-1</sup>. The measurements results are compared with SO<sub>2</sub> cross section data from literature.