A Simple Method of Investigating Wireless Echoes of Short Delay


ONE of the two methods most commonly used in the determination of the equivalent height of the Kennelly-Heaviside layer is that involving the measurement of the time required for a brief wireless signal to travel upwards to the reflecting region and back. This quantity is most conveniently determined by causing an emitting station to send out very short pulses of radio-frequency energy, and measuring, at a point a short distance away, the difference between the times of arrival of a particular signal pulse via the ground and via the upper atmosphere.

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    Breit and Tuve, Phys. Rev., 28, p. 554; 1926: Tuve and Dahl, Proc. Inst. Rad. Eng., 16, No. 6, p. 794; 1918: and Goubay, Phys. Zeit., 31, No. 7, p. 333; 1930.

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    Proc. Roy. Soc., A, 111, p. 672; 1926.

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APPLETON, E., BUILDER, G. A Simple Method of Investigating Wireless Echoes of Short Delay. Nature 127, 970 (1931). https://doi.org/10.1038/127970a0

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