Title :
Sunspot-cycle variations in the discrepancies between predicted and observed frequencies for use in radiocommunication
Author :
Hitchcock, R.J. ; Evans, G.O. ; Naismith, R.
fDate :
9/1/1960 12:00:00 AM
Abstract :
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
Keywords :
ionospheric electromagnetic wave propagation; radio reception; radiowave propagation;
Journal_Title :
Proceedings of the IEE - Part B: Electronic and Communication Engineering
DOI :
10.1049/pi-b-2.1960.0143