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Kennelly-Heaviside Layer (Ionosphere)

April 21th Fact-of-the-Day

The existence of the ionosphere was independently surmised by Arthur E. Kennelly in the United States and Oliver Heaviside in England in 1902. The idea of an electrically-conducting Kennelly-Heaviside layer about 50-miles high that would return radio waves to earth was generally accepted from shortly after that time until 1924 when the basic theory was proven and expanded to include higher regions of ionized particles. The ionosphere has been a subject of intense interest, theoretical analysis, and practical investigation ever since. Although radio amateurs frequently complain about poor propagation conditions due to the current state of the ionosphere, continual ionospheric changes make the hobby much more interesting than it would be if propagation conditions were always the same. ©2005 Martek International All rights reserved.


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