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Journal of Atmospheric and Terrestrial Physics, 1959
Abstract Spread- F conditions have been examined for six low-latitude stations—Dakar, Khartoum, Djibouti, Ibadan, Nairobi and Leopoldville. It is shown that, contrary to the general view, occurrence of disturbed magnetic conditions inhibits the occurrence of spread- F layers during the southern solstice at all these stations.
R.W. Weight, N.J. Skinner
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Abstract Spread- F conditions have been examined for six low-latitude stations—Dakar, Khartoum, Djibouti, Ibadan, Nairobi and Leopoldville. It is shown that, contrary to the general view, occurrence of disturbed magnetic conditions inhibits the occurrence of spread- F layers during the southern solstice at all these stations.
R.W. Weight, N.J. Skinner
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Unresolved spread-f as a result of pulse spreading
Journal of Atmospheric and Terrestrial Physics, 1977Abstract The shape of pulses returned to an ionosonde after reflection from an electron density profile containing irregularities which cause the composite profile to be non-monotonic have been calculated. The effect of the ionosonde receiver on these returned pulse shapes has been simulated by band-pass filtering the received frequency spectrum and ...
I Robinson, P.L Dyson
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Geomorphology of spread F and characteristics of equatorial spread F
Journal of Geophysical Research, 1959Between magnetic latitudes 20°N and 20°S there is a well defined region where spread F is a normal occurrence on magnetically quiet days. Equatorial spread F is a night-time phenomenon that begins between 1900 and 2200 by a characteristic doubling of the layer and an increase in virtual height, indicating a vertical velocity.
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Journal of Atmospheric and Terrestrial Physics, 1970
Abstract Spread- F echoes are not due to partial reflection from small irregularities. Rather they are due to total reflection from large tilted surfaces of ionization. The geometry of these surfaces is examined using ionograms and airglow observations, together with Australian experiments reported in the literature.
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Abstract Spread- F echoes are not due to partial reflection from small irregularities. Rather they are due to total reflection from large tilted surfaces of ionization. The geometry of these surfaces is examined using ionograms and airglow observations, together with Australian experiments reported in the literature.
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The belt of equatorial spread-F
Journal of Atmospheric and Terrestrial Physics, 1960Abstract The morphology of the belt of equatorial spread-F at sunspot maximum is investigated, using I.G.Y. data, for magnetically quiet and magnetically disturbed conditions respectively. The belt is found to extend from about 30°S to 30°N in magnetic latitude and to have a region of very high incidence, exceeding 90 per cent for the early part of ...
Lyon, AJ, Skinner, NJ, Wright, RWH
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