Comparison between the observed and modelled spectra of the NH₂(0,9,0), (0,8,0), and (0,7,0) bands. The modelled spectrum of C₂ is also plotted in the NH₂ (0,9,0) band panel, but because of the depleted nature of 21P, the C₂ lines do not affect the NH₂ spectrum. The ortho- and para-lines of NH₂ are labelled in these modelled spectra. The two strong emission lines at 6300 and 6364 Å are the forbidden oxygen lines in the NH₂ (0,8,0) bandpanel. We note that the intensity ratio among bands is not correct because we scaled intensity for each plot independently.