Abstract
Seasonal and diurnal variations for [O I] λ5577 A, [O I] λ6300 A, and NaI λλ5890–5896 A emissions during 1967 are reported. The southern hemisphere station results for λ5577 and λ6300 emissions are similar to results reported from a northern hemisphere tropical station. The λ6300 emission variation is in phase for both hemispheres. The λλ5890–5896 emission variation is seasonal, the primary maximum being in the fall and the secondary maximum being in the spring, i.e., 6 months out of phase for both hemispheres. The suggested connection between the λ6300 emission intensity fluctuations and electric fields in the F layer is strengthened.
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