Normalised spectral observations of wind lines of SSN 17, normalised and compared to various models. The observed spectra of SSN 17 is shown by the black line. Synthetic spectra with and D = 1 shown by the solid red line. The dotted red line shows model spectra with and D = 5 while the dashed red line shows the spectra with and D = 10. All shown models have v_∞ = 1000 km s⁻¹.