Abstract
IT is well known that the ionospheric spread-F condition is extremely common at night in equatorial regions. At Ibadan, Nigeria (latitude 7½°N.), this has been especially so during the past 2½ years of high sunspot activity. It is believed that the same irregularities which produce the wide spread of scattered echoes from the F-region are also responsible for the scintillations of radio stars1 and perhaps for the rapid ‘flutter’ fading2 often observed in shortwave radio reception in equatorial regions.
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References
Wright, R. W., Koster, J. R., and Skinner, N. J., J. Atmos. Terr. Phys., 8, 240 (1956).
Osborne, B. W., J. Atmos. Terr. Phys., 2, 66 (1952).
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LYON, A., SKINNER, N. & WRIGHT, R. Equatorial Spread-F and Magnetic Activity. Nature 181, 1724–1725 (1958). https://doi.org/10.1038/1811724a0
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DOI: https://doi.org/10.1038/1811724a0
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