Fig. 22
Spectrum of a bright Na-poor meteor M20170227_023123 with identified major lines (upper). The monochromatic light curve (lower) shows early emission of Mg, which also remains after Na and Fe lines disappear. Here, the Fe I monochromatic light curve is only represented by the intensity of the 526.9 nm line. One frame corresponds to a time period of 1/12 s.
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