E layer
noun Date: 1933 a layer of the ionosphere occurring about 65 miles (110 kilometers) above the earth's surface during daylight hours that is capable of reflecting shortwave frequencies

New Collegiate Dictionary. 2001.

Look at other dictionaries:

  • E layer — n. a dense layer of ions in the E region of the ionosphere at an altitude of c. 100 km ( c. 62 mi), capable of reflecting shortwave radio waves …   English World dictionary

  • E layer — A highly ionized part of the ionosphere with an ionization of around 105 free electrons/cm3. It is found at heights of 60 to 90 miles (100 to 150 km). Its height varies between summers and winters as well as days and nights. It is most pronounced …   Aviation dictionary

  • E-layer — n. a layer of the ionosphere able to reflect medium frequency radio waves. Etymology: E (arbitrary) + LAYER * * * E layer or E region see ↑Kennelly Heaviside layer • • • Main Entry: ↑E …   Useful english dictionary

  • E layer — noun a region of the ionosphere (from 50 to 90 miles up) that reflects radio waves of medium length • Syn: ↑Heaviside layer, ↑Kennelly Heaviside layer, ↑E region • Instance Hypernyms: ↑region, ↑part • Part Holonyms: ↑ …   Useful english dictionary

  • E layer — the radio reflective ionospheric layer of maximum electron density, normally found at an altitude between 60 and 75 mi. (100 and 120 km). Also called Heaviside layer, Kennelly Heaviside layer. [1930 35] * * * …   Universalium

  • E-layer — noun a layer of the ionosphere able to reflect medium frequency radio waves. Origin 1930s: arbitrary use of the letter E …   English new terms dictionary

  • E layer — n. phs the radio reflective ionospheric layer of maximum electron density, at an altitude of about 60 mi. (100 km) • Etymology: 1930–35 …   From formal English to slang

  • E layer — /ˈi leɪə/ (say ee layuh) noun → Heaviside layer …   Australian English dictionary

  • sporadic e layer — noun Usage: usually capitalized E : a layer of ionization occurring irregularly within the E region of the ionosphere at heights of approximately 60 miles above the surface of the earth and occasionally being capable of reflecting radio waves of… …   Useful english dictionary

  • sporadic E layer — noun Date: 1949 a layer of ionization occurring irregularly within the E region of the ionosphere …   New Collegiate Dictionary

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