Abstract
RECENTLY, Dr. J. H. Dellinger, head of the radio section of the Bureau of Standards at Washington, suggested that a close watch should be kept to see whether there was a fade-out of radio transmissions at any time between October 21 and 25. He was led to make this suggestion by the discovery of severe fading occurring on March 20, May 12, July 6 and August 30, which indicate a 54-day cycle. According to a report issued by Science Service, Washington, D.C., certain short wave-lengths were wiped out by eruptions of the sun for the single day October 24. This fade-out sheds new light on the difficult problem of the connexion between radio transmission, sun-spots and magnetic storms. Ordinary transmissions having wave-lengths approximately the same as those used in domestic broadcasting were not affected; but experimental radio transmission was completely wiped out, and the sending of commercial and amateur radiograms was greatly hampered.
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Solar Activity and Radio Transmission. Nature 136, 947–948 (1935). https://doi.org/10.1038/136947c0
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DOI: https://doi.org/10.1038/136947c0