What is another word for Heaviside Layer?
Pronunciation: [hˈɛvɪsˌa͡ɪd lˈe͡ɪə] (IPA) 
The Heaviside Layer, also known as the Kennelly-Heaviside Layer, is a region of the Earth's ionosphere that reflects radio waves back to the ground. This layer is an important part of the Earth's atmosphere as it allows long distance radio communications. There are a few synonyms for the Heaviside Layer including the E-layer, the Sporadic E-layer, and the Appleton Layer. The E-layer is located between 90 and 120 kilometers above the surface of the Earth and is thickest during daylight hours. The Sporadic E-layer is a patchy layer that can occur at any height in the ionosphere while the Appleton Layer is named after Edward Victor Appleton who discovered it. All three terms are used interchangeably to describe this region of the Earth's atmosphere.
