Definition of F region

1. Noun. 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.

Exact synonyms: Appleton Layer, F Layer
Group relationships: Ionosphere
Generic synonyms: Part, Region

Lexicographical Neighbors of F Region

F clef
F clefs
F distribution
F instrument
F instruments
F layer
F major
F minor
F minus
F minuses
F pili
F region (current term)
F waves
F word
F words
Fab
Fab Four
Fab fragment
Fab piece
Fabaceae
Faber's anaemia
Faber's syndrome
Faberge
Faberge egg
Fabian

Literary usage of F region

Below you will find example usage of this term as found in modern and/or classical literature:

1. Change-Point Problems by Edward G. Carlstein, Hans-Georg Müller, David Siegmund (1994)
"Like the conditional likelihood ratio region of Section 2 the approximate F region is based on the likelihood ratio statistic. However, the boundaries of ..."

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