A high-resolution Fourier transform spectrometer has been used to record a large number of spectra, with ozone and foreign gas pressures ranging from 5 to 50 Torr and 80 to 700 Torr, respectively. The (2100-\mathrm{cm}^{-1}) region corresponding to the (\nu_{1}+\nu_{3}) band of (\mathrm{O}{3}) has been analyzed and the broadening coefficients by (\mathrm{N}{2}) and (\mathrm{O}{2}) at room temperature have been derived for 112 lines with an accuracy better than (3 \times 10^{-3} \mathrm{~cm}^{-1} \mathrm{~atm}^{-1}). This study covers a wide range of rotational quantum numbers (\left(J^{\prime \prime}=0-40, K{a}^{\prime \prime}=0-11\right)) in an (A)-type band (\left(\nu_{1}+\nu_{3}\right)). Calculations of these broadening coefficients have been performed with a theoretical model successfully tested on (\mathrm{H}{2} \mathrm{O}) linewidths. This model provides a correct modeling of close collisions since the contributions of an atom-atom potential and trajectory modifications at short distance are accounted for. It has been previously applied to (\mathrm{O}{3}) line broadening by (\mathrm{N}{2}) and (\mathrm{O}{2}) but only a dozen of (B) type lines were then investigated. In the present study, the atom-atom parameters for the (\mathrm{O}{3}-\mathrm{N}{2}) and (\mathrm{O}{3}-\mathrm{O}{2}) interactions have been adjusted to match experiment since no intermolecular anisotropic potential is, to our knowledge, available for (\mathrm{O}{3}). The standard deviations between experimental and theoretical results are about (6 %), with absolute maximum deviations of about (14 %) for (\mathrm{O}{3}-) (\mathrm{N}{2}) and (\mathrm{O}{3}-\mathrm{O}{2}). Furthermore, use of simple empirical polynomial corrections of calculated results versus rotational quantum numbers leads to agreement between observations and calculations better than (2 %) for the (\mathrm{O}{2}) and (\mathrm{N}_{2}) broadenings of most lines. 氏í 1993 Academic Press. Inc.