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Earth, Planets and Space
Fig. 1 | Earth, Planets and Space

Fig. 1

From: Relationship between Na layer and CNA variations observed at Syowa, Antarctic

Fig. 1

a Comparison between Na density at 105 km and CNA, and its correlation coefficient is also shown in the figure. b Probability density function (PDF) of Na density at 105 km for CNA of 0–0.25 dB (quiet). Black shows data from observations, and red shows a fitted PDF with a least-squares method. Derived parameters of the fitted PDF are also shown in the figure. c Same as b but for CNA of 0.25–2 dB (active)

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