Abstract
KNOWLEDGE of the intensity–frequency relation of extraterrestrial radio emission has been obtained from scaled aerial experiments at frequencies higher than 20 Mc/s (refs. 1 and 2) and from ground-based or satellite-borne radiometers operating below 10 Mc/s (refs. 3, 4 and 5). The low-frequency observations, whether ground-based or satellite-borne, are affected by the ionosphere. The consequence of these ionospheric effects has resulted in difficulties being experienced when reconciling the observations in frequency regions below 10 Mc/s with those above 20 Mc/s.
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YATES, K., WIELEBINSKI, R. Sky Brightness at 14.1 Mc/s. Nature 208, 64–65 (1965). https://doi.org/10.1038/208064a0
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DOI: https://doi.org/10.1038/208064a0
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