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E layer
E layer A component of the Earth's ionosphere, at an altitude of 110 km; also known as the Heaviside layer after the English physicist Oliver Heaviside (1850–1925). It is used as a reflective surface by radio operators. Electron densities in the E layer show diurnal variation, being greater during daytime. Absorption of radio waves by the denser daytime E layer can be a problem. Localized patches of sporadic E ionization which commonly appear at the same atmospheric level during the summer months can also disrupt short-wave radio communication.
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"E layer." A Dictionary of Astronomy. 1997. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>. "E layer." A Dictionary of Astronomy. 1997. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1O80-Elayer.html "E layer." A Dictionary of Astronomy. 1997. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O80-Elayer.html |
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E layer
E lay·er • n. a layer of the ionosphere able to reflect medium-frequency radio waves. |
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Cite this article
"E layer." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>. "E layer." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1O999-elayer.html "E layer." The Oxford Pocket Dictionary of Current English. 2009. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O999-elayer.html |
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