Abstract
ECHOES of very low frequency radio signals from station NDT on 17.44 kc./s. in Tokyo (25° N. geomagnetic latitude) with delays of about 0.2 sec. have been detected at Hobart, Tasmania (51° S. geomagnetic latitude). The Eckersley–Storey theory of ‘whistler’ propagation predicts that ‘whistler mode’ signals from Tokyo would return to the Earth's surface at a point (the geomagnetic conjugate point to Tokyo) near Darwin, Northern Territory, some 3,500 km. from Hobart.
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References
Maeda, K., and Kimura, T., Rep. Ionosph. Res. Japan, 10, No. 3, 105 (1956).
Allcock, G. McK., A.N.Z.A.A.S. Conference, Adelaide (1958).
Storey, L. R. O., Phil. Trans. Roy. Soc., A, 246, 908 (1953).
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DOWDEN, R., GOLDSTONE, G. ‘Whistler Mode’ Echoes remote from the Conjugate Point. Nature 183, 385–386 (1959). https://doi.org/10.1038/183385a0
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DOI: https://doi.org/10.1038/183385a0
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