What is the meaning of Appleton layer?

noun

  • The highest region of the ionosphere (from 90 to 600 miles up) which contains the highest concentration of free electrons and is most useful for long-range radio transmission.
WordNet 3.0 © 2006 by Princeton University
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APAWordNet. (2010). appleton layer. Retrieved September 23, 2026, from http://smartdefine.org/appleton_layer/definitions/1224278
ChicagoWordNet. 2010. "appleton layer" http://smartdefine.org/appleton_layer/definitions/1224278 (accessed September 23, 2026).
HarvardWordNet 2010, appleton layer, Smart Define, viewed 23 September, 2026, <http://smartdefine.org/appleton_layer/definitions/1224278>.
MLAWordNet. "appleton layer" 23 October 2010. Web. 23 September 2026. <http://smartdefine.org/appleton_layer/definitions/1224278>