Abstract
No useful analytical solution has yet been given for the propagation of vertically polarized radio waves over a non-homogeneous earth. On one hand, Grünberg1 and other Russian authors have started analytical work on the right lines, but seemingly without being able to arrive at any reasonable answers; on the other, Millington2 has suggested a practical graphical procedure, based on the general features that a rigorous solution would be expected to possess. Millington's method ignores phase relationships altogether; but recent experimental work indicates that it gives a good estimate of field-strengths3,4,5.
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References
Grünberg, G., Phys. Rev., 63, 185 (1943).
Millington, G., Proc. Inst. Elect. Eng., 96, Pt. 3, 53 (1949).
Millington, G., Nature, 163, 128 (1949).
Millington, G., Nature, 164, 114 (1949).
Elson, N., Nature, 164, 115 (1949).
Carlson, J. F., and Heins, A. E., Quart. J. App. Math., 4, 313 (1947).
Levine, H., and Schwinger, J., Phys. Rev., 73, 383 (1948).
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CLEMMOW, P. Ground-Wave Propagation Across a Land/Sea Boundary. Nature 165, 107–108 (1950). https://doi.org/10.1038/165107b0
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DOI: https://doi.org/10.1038/165107b0
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