Spread-F and the parameters of the F-layer of the ionosphere-I. Spread-F and F-layer electron density

Singleton D.G. (1962) Spread-F and the parameters of the F-layer of the ionosphere-I. Spread-F and F-layer electron density. Journal of Atmospheric and Terrestrial Physics, 24 11: 871-884.

Author Singleton D.G.
Title Spread-F and the parameters of the F-layer of the ionosphere-I. Spread-F and F-layer electron density
Journal name Journal of Atmospheric and Terrestrial Physics
ISSN 0021-9169
Publication date 1962-01-01
Sub-type Article (original research)
Volume 24
Issue 11
Start page 871
End page 884
Total pages 14
Subject 1902 Film, Television and Digital Media
1908 Geophysics
Abstract An analysis has been made of spread-F data obtained from I.G.Y. f{hook}-plots for several ionosonde stations grouped about longitude 75°W, to establish whether there is any connexion between the incidence of spread-F and f{hook}0F2, F-layer electron content and semi-thickness. It is found that the percentage occurrence of the frequency-spreading component of spread-F at a value of f{hook}0F2 increases as 1 f{hook}0F2 for all seasons and latitudes. This relationship is shown to be independent of such associations as might exist between each of the two quantities involved and either the state of disturbance of the earth's magnetic field or the time of day. There seems to be no association between the incidence of frequency-spreading and the rate of change of f{hook}0F2, nor is there any association with the electron content of the F-layer. However, frequency-spreading is more likely to occur when the rate of change of electron content is positive and to a lesser extent negative, at least at equatorial latitudes. At these latitudes, there is a tendency for the incidence of frequency-spreading to decrease with increasing semi-thickness up to about 100-150 km. This tendency then reverses, the incidence increasing with increasing thickness above about 200 km. Discussion of these results is postponed to a later paper in the series.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import
 
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Created: Tue, 12 Jul 2016, 13:22:36 EST by System User