| 释义 |
Heaviside layer
Heav·i·side layer H0115800 (hĕv′ē-sīd′)n. See E layer.
[After Oliver Heaviside (1850-1925), British physicist.]Heaviside layer n (Physical Geography) the E region of the ionosphere. See E region Thesaurus| Noun | 1. | Heaviside layer - a region of the ionosphere (from 50 to 90 miles up) that reflects radio waves of medium lengthE layer, E region, Kennelly-Heaviside layerionosphere - the outer region of the Earth's atmosphere; contains a high concentration of free electrons |
Heaviside layer
Heaviside layer[′hev·ē‚sīd ‚lā·ər] (geophysics) E layer Heaviside layer A layer of ionized particles that surrounds the earth. The layer, also called the E layer, has ionization of around 106 free electrons. The layer is found at a height of around 60 to 90 miles (100-150 km), but its height varies according to the seasons and during the day and at night. The Heaviside layer reflects relatively long, low-frequency radio waves ranging from 100 kHz to 20 MHz. Also called the Kennelly-Heaviside layer and the E region of the atmosphere.Heaviside layer
Synonyms for Heaviside layernoun a region of the ionosphere (from 50 to 90 miles up) that reflects radio waves of medium lengthSynonyms- E layer
- E region
- Kennelly-Heaviside layer
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