Parameters of drift-pair bursts versus emission frequency. (a) Time delay between the burst components. (b) Relative intensity of the second component. Black lines show the simulation results for an emission source located at longitude θ₀ = 10°, ϵ = 0.8, α = 0.1, and initial emission to plasma frequency ratios ﹩f/{f}_{\mathrm{pe}}({r}_{0})=1.05﹩ and 1.10 (marked by ﹩\square ﹩ and ﹩\diamond ﹩ symbols, respectively). The observations are plotted as indicated by the legend. Error bars represent one standard deviation.