Relative intensities of high-temperature component lines. Meteors are marked as in Figure 4. (a) Ratio of the integrated intensity at H_α to Mg II–8 at 789.63 nm compared to the ratio of H_α to the whole observed spectrum. (b) Ratio of the integrated intensity at H_α to Mg II–4 at 448 nm compared to the ratio of H_α to the whole observed spectrum. (c) Ratio of the integrated intensity at H_α to O I–1 at 777 nm as a function of the ratio of the intensity in the H_α region to the intensity of the whole observed spectrum.