Sunspot-cycle variations in the discrepancies between predicted and observed frequencies for use in radiocommunication
作者:
R.J.Hitchcock,
G.O.Evans,
R.Naismith,
期刊:
Proceedings of the IEE - Part B: Electronic and Communication Engineering
(IET Available online 1960)
卷期:
Volume 107,
issue 35
页码: 423-426
年代: 1960
DOI:10.1049/pi-b-2.1960.0143
出版商: IEE
数据来源: IET
摘要:
A marked variation occurs over the sunspot cycle in the discrepancies between predicted F2-4000km m.u.f. and the observed times of fade-in and fade-out on an 18.4Mc/s Bombay-London circuit. This is particularly marked in summer and is attributed to the influence of the sporadic-E layer, although there is no marked sunspot-cycle effect attributed to this layer.Any assessment of the accuracy of predictions analysed on the assumption of F-layer propagation must be considered in relation to the phase of the sunspot cycle to which it refers
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