Appleton layer

(redirected from F2 layer)
Also found in: Thesaurus, Encyclopedia.
Related to F2 layer: F1 layer

Appleton layer

n
(Physical Geography) the F region of the ionosphere
[C20: named after Sir Edward Appleton]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.Appleton layer - 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
ionosphere - the outer region of the Earth's atmosphere; contains a high concentration of free electrons
References in periodicals archive ?
Therefore, the electron density increases with an increment of the solar activity and height until it reaches its maximum at F2 layer peak.
2] the E, F1 and F2 layer peak electron densities (in [10.
The neurons, or nodes, in the F2 layer represent input categories.
The F2 layer extends from about 250 to 400 km above the Earth.