LONG-WAVE RADIO TRANSMISSION PHENOMENA 17 



5. "On Some Direct Evidence for Downward Atmospheric Reflection of Electric 



Waves," by E. V. Appleton and M. A. F. Barnett, Proc. Royal Soc, 109, 

 1925, pp. 621-641. 



6. "A Preliminary Investigation of Fading in New South Wales," by A. L. Green 



and W. G. Baker, Bulletin No. 63, Radio Research Board Report No. 4, 

 Council for Scientific and Industrial Research, Commonwealth of Australia, 

 1932. 



7. "General Theory of the Propagation of Radio Waves in the Ionized Layer of 



the Upper Atmosphere," Shogo Namba, Proc. I.R.E., February 1933. 



8. "Some Long Distance Transmission Phenomena of Low-Frequency Waves," 



I. Yokoyama and I. Tanimura, Proc. I.R.E., Fel)ruary 1933. 



9. "The Propagation of Radio Waves," by J. Hollingworth, Jour. I.E.E., Vol. 64, 



1925-1926, pp. 579-589. 



10. "Experiments and Observations Concerning the Ionized Regions of the Atmos- 



phere," by R. A. Heising, Proc. I.R.E., Vol. 16, January 1928, pp. 75-99. 



11. "The Effect of the Recent Solar Eclipse on the Ionized Layers of the Upper 



Atmosphere," Schafer and Goodall, Science, Vol. 76, November 11, 1932, 

 pp. 444-446. 



12. "Radio Studies of the Ionosphere," by Schafer and Goodall, Nature, September 



30, 1933, pp. 521-522. 



13. " Ionosphere Aleasurements During the Partial Eclipse of the Sun of February 3, 



1935," by Schafer and Goodall, Nature, March 9, 1935, pp. 393-394. 



14. "Radio Observations of the Bureau of Standards During the Eclipse of August 



31, 1932," by S. S. Kirby, L. V. Berkner, T. R. Gilliland and K. A. Norton, 

 Proc. I.R.E., Vol. 22, No. 2, February 1934. 



15. "Report on Ionization Changes During a Solar Eclipse," by E. V. Appleton and 



S. Chapman, Proc. I.R.E., Vol. 23, June 1935, pp. 658-669. 



16. "Radio Propagation Over Spherical Earth," by C. R. Burrows, Proc. I.R.E., 



Vol. 23, May 1935, pp. 470-480. 



17. "Summary of Progress in the Study of Radio Wa\-e Propagation Phenomena," 



by G. \\\ Kenrick and G. W. Pickard, Proc. I.R.E., Vol. 18, April 1930, pp. 

 649-668. 



18. "Phase Interference Phenomena in Low-Frequency Radio Transmission," by 



G. W. Kenrick and G. W. Pickard, Proc. I.R.E., Vol. 22, March 1934, pp. 

 344-358. 



19. "American Practical Navigator," Bowditch, Hydro graphic Office Publication H.O. 



No. 9, Government Printing Office, Washington, D. C. 



20. "The Sumner Line of Position," U. S. Hydrographic Office Publication H.O. 



No. 203, Government Printing Office, Washington, D. C. 



21. Bakerian Lecture, "Some Phenomena of the Upper Atmosphere," by S. Chap- 



man, Proc. Royal Soc, Vol. 132, No. A820, August 1, 1931. 



22. "An Analysis of Continuous Records of Field Intensity at Broadcast Fre- 



quencies," by K. A. Norton, S. S. Kirby and G. H. Lesler, Research Paper 

 RP752, Jour, of Research, Nat. Bureau of Standards, Vol. 13, Decernber 1934. 



23. "Some Measurements of the Equivalent Height of the Atmospheric Layer," 



by E. V. Appleton, Proc. Royal Soc, Vol. 126, 1929-1930, p. 543. 



APPENDIX I 



Position of Intermediate Points on the Transmission Path 



The method of determining the transmission path parameters and 

 the position of intermediate path points spaced a given distance from 

 a path terminal is given in detail below. 

 Let (f — Latitude, 

 Lo = Longitude, 



D = Distance, nautical miles between subscript points, 

 C = Path azimuth at subscript point, 

 Subscript a denotes sending station, 



