Mid-latitude frequency spread and its association with small scale ionospheric stratifications

Bowman G.G., Clarke R.H. and Meehan D.H. (1988) Mid-latitude frequency spread and its association with small scale ionospheric stratifications. Journal of Atmospheric and Terrestrial Physics, 50 9: 797-809. doi:10.1016/0021-9169(88)90102-X


Author Bowman G.G.
Clarke R.H.
Meehan D.H.
Title Mid-latitude frequency spread and its association with small scale ionospheric stratifications
Journal name Journal of Atmospheric and Terrestrial Physics
ISSN 0021-9169
Publication date 1988-01-01
Sub-type Article (original research)
DOI 10.1016/0021-9169(88)90102-X
Volume 50
Issue 9
Start page 797
End page 809
Total pages 13
Subject 1902 Film, Television and Digital Media
1908 Geophysics
Abstract A variety of ground based radio techniques have provided new information relating to the nature of mid-latitude F-region irregularities responsible for frequency spreading on ionograms. Firstly, an analysis of ionograms covering a restricted frequency band indicates that frequency spreading is primarily caused by duplicate traces which are often unresolved in group path on standard ionograms. Furthermore, where angle of arrival information is available, the duplicate traces are shown to represent reflections from markedly different directions and the spread in critical frequencies is therefore indicative of a horizontal gradient in the peak electron density over a scale size of the order of many tens of kilometres. Secondly, the individual duplicate traces themselves are shown to comprise quasi-horizontal trace (QHT) segments which are unresolved on conventional ionograms and contribute to the diffuse appearance of spread-F traces on those ionograms. Difficulties in attributing these observations to the widely held view that scattering from small scale structures is the causative mechanism are discussed.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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