Published online by Cambridge University Press: 24 October 2008
A development of the “echo” method of observation of the height of the Kennelly-Heaviside layer is described. Short wave-trains of radiation lasting sec. are transmitted at regular sec. intervals, and observed stroboscopically, together with their echoes, by means of a cathode ray oscillograph. Details of the transmitting and receiving apparatus are given. The rapid fluctuation in amplitude of the echoes is easily studied by this method.
* Breit, G. and Tuve, M. A., Phys. Rev. vol. 28, 554 (1926)CrossRefGoogle Scholar; Tuve, and Dahl, , Proc. Inst. Rod. Eng. vol. 16, 794 (1928)Google Scholar and several subsequent papers in P.I.R.E.
† Appleton, E. V., Proc. Phys. Soc. vol. 41, p. 43 (1928)CrossRefGoogle Scholar, and vol. 42, p. 321 (1930).
* Goubau, G., Physikal. Zeitschr. vol. 31, no. 7 (1930)Google Scholar.