Triple splitting with the F2-region of the ionosphere at high and mid-latitudes

Bowman G.G. (1960) Triple splitting with the F2-region of the ionosphere at high and mid-latitudes. Planetary and Space Science, 2 4: 214-218.

Author Bowman G.G.
Title Triple splitting with the F2-region of the ionosphere at high and mid-latitudes
Journal name Planetary and Space Science   Check publisher's open access policy
ISSN 0032-0633
Publication date 1960
Sub-type Article (original research)
Volume 2
Issue 4
Start page 214
End page 218
Total pages 5
Subject 1908 Geophysics
1912 Space and Planetary Science
3103 Astronomy and Astrophysics
Abstract The occurrence of the third (z-ray) component of the F2-trace on ionograms is investigated at high- and mid-latitudes. Diurnal variations show a systematic shift, with magnetic inclination, of the time of maximum occurrence. Seasonal variations show a winter maximum, and an inverse sunspot-cycle relationship exists. Maximum occurrence appears between a magnetic inclination of 70° and 80° with a fall-off either side. Evidence is presented to suggest a z-ray association with "Spread-F" fronts, and a possible mechanism for the recording of the z-ray trace at the transmitter site is described. This involves longitudinal propagation of the o-mode at its normal reflection level, coupling at this point, and ultimate reflection for the z-ray mode as a result of sloping ionization contours belonging to "Spread-F" fronts extending in directions perpendicular to the magnetic meridian. An association with V.L.F. emissions ("dawn-chorus") is 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
 
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Created: Tue, 12 Jul 2016, 00:38:18 EST by System User