Fig. 3
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Comparison between normalized calibrated spectra of Perseid and Alpha Monocerotid (5:01:51 UT) meteors. The spectrum of Perseid is shifted by 0.1 in intensity for clarity. No sodium Na I-1 and only weak molecular radiation of nitrogen N2 can be seen in the region between 5600 and 6100 Å for the Alpha Monocerotid spectrum. The sodium is visible in the Perseid spectrum.
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