Abstract
IN the course of recent experiments1 on the structure of the ionosphere, we have found that not two only but several2 ‘layers’ exist in which there is either a maximum, or a tendency towards a maximum, of ionic density. Since any complete theory of the structure of the upper atmosphere or of the transmission of radio waves through it must take these facts into account, it is thought that a brief summary of the results will be of interest. Certain observations concerning abrupt variations of ionisation will also be described. In all these experiments transmission was at normal incidence to the layers.
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The method used was that previously described in the Proc. Inst. Radio Eng., July, 1932.
This had previously been suspected for days of magnetic storms (loc. sit., p. 1145).
T. L. Eckersley also has concluded that the F region may be stratified. See J. Inst. Elec. Eng., vol. 71, September, 1932.
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SCHAFER, J., GOODALL, W. Characteristics of the Ionosphere. Nature 131, 804 (1933). https://doi.org/10.1038/131804a0
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DOI: https://doi.org/10.1038/131804a0
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