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Sodium twilight emission measured with a tilting filter photometer

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Summary

In this note we report preliminary measurements of sodium twilight emissions showing the variation of theD 2 /D 1 ratio during twilight at solar depression angles α as low as 3.5°.

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Visconti, G., Fiocco, G. Sodium twilight emission measured with a tilting filter photometer. PAGEOPH 91, 166–170 (1971). https://doi.org/10.1007/BF00879566

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  • DOI: https://doi.org/10.1007/BF00879566

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