Panel A: high-resolution (gray) together with the low-resolution (red) spectrum. The most significant spectral lines are labeled. Panel B: examples of spectra recorded by observational spectographs. Starting with the upper spectrum of Perseid 20150811_014658 (brown), Sporadic 20161227_020734 (red), Perseid 20150812_231001 (black), Leonide 20161117_042009 (blue), Ursae Majorid 20161213_014212 (green), Alpha Camelopardalid 20161002_013415 (purple), and Perseid 20150812_232102 (wine). Overview of the selected spectral features (marked with gray lines). The detailed description of the individual spectral lines is provided in Table A.1.