Abstract
IT has recently been found1'2 that semi-diurnal lunar variations are derivable from the routine measurements made at ionospheric observatories. These variations are found not only in the heights of all the principal ionospheric regions, but also1 in the maximum electron densities of the F2 region. Near the magnetic equator they are found to be very large indeed, the height variations being at certain times some fifty times greater than the already large variations previously found by Appleton and Weekes3 in the E region.
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References
Martyn, D. F., Proc. Roy. Soc., A, 190, 273 (1947).
Martyn, D. F., Proc. Roy. Soc., A, 194, 429 (1948).
Appleton, E. V., and Weekes, K., Proc. Roy. Soc., A, 171, 171 (1939)
Pekeris, C. L., Proc. Roy. Soc., A, 158, 650 (1937).
Martyn, D. F., Proc. Roy. Soc., A, 189, 241 (1947).
Schuster, A., Phil. Trans. Roy. Soc., A, 208, 163 (1908).
Martyn, D. F., Nature, 160, 535 (1947).
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MARTYN, D. Lunar Variations in the Principal Ionospheric Regions. Nature 163, 34–36 (1949). https://doi.org/10.1038/163034a0
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DOI: https://doi.org/10.1038/163034a0
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