E REGION
Weather
In solar-terrestrial terms, a daytime layer of the earth's ionosphere roughly between the altitudes of 85 and 140 km.
Telecommunications
That portion of the ionosphere existing between approximately 95 and 130 km above the surface of the Earth. Note: The E Region lies between the D and F regions. Synonyms Heaviside layer, Kennelly-Heaviside layer.
