Summary
The space between the earth and the ionosphere is considered as a wave-guide with sharply bounded walls. Employing a representation in terms of spherical wave functions of complex order, the field of a vertical dipole source is calculated for very low frequencies. It is shown that the dominant mode for 16 kc is of order one and not zero as has been commonly supposed. Good agreement is obtained with the experimental results ofJ. Heritage.
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Wait, J.R. On the mode theory of V. L. F. ionospheric propagation. Geofisica Pura e Applicata 37, 103–115 (1957). https://doi.org/10.1007/BF01988854
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DOI: https://doi.org/10.1007/BF01988854