Fried parameter r₀ estimated by fitting versus the r₀ used in OOMAO to generate the PSF. All r₀ are given at 500 nm. Here are shown results on 84 different PSFs, corresponding to seven values of r₀ and 12 different wavelengths. The line is the linear fit between our r₀ estimation and OOMAO r₀. Crosses show residuals |r_0, FIT − r_0, OOMAO|. A log–log scale is used to show on the same graph both data and residuals.