Abstract
USING the familiar methods of radio sounding, it has already been established that both the E- and F-layers of the ionosphere are subject to height oscillations which are semi-diurnal relative to a lunar day. Such results have been obtained both for Slough1,2, England, and for Canberra3,4, Australia. From the point of view of the accepted theory of the lunar magnetic variations, it is, however, of interest to make a similar investigation of the D-layer, since it is clear, from general considerations, that the electric currents responsible for such magnetic variations flow in the lower part of the ionosphere.
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References
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APPLETON, E., BEYNON, W. Lunar Oscillations in the D-Layer of the Ionosphere. Nature 164, 308 (1949). https://doi.org/10.1038/164308a0
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DOI: https://doi.org/10.1038/164308a0
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