A new expression for the integral transmission of atmospheric ozone has been developed. This expression is based on the latest ozone spectral absorption data and on the Neckel and Labs model (1981, 1984), incorporating the most recent corrections on the extraterrestrial solar spectrum, introduced by Wehrli (1985) and VanHoosier et al. (1988). The proposed expression can be used to parameterize the integral ozone transmission and to estimate in conjunction with solar radiation models the direct, diffuse and global solar radiation on the Earth＇s surface.