Physics
Scientific paper
Sep 1947
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1947natur.160..371h&link_type=abstract
Nature, Volume 160, Issue 4063, pp. 371-372 (1947).
Physics
4
Scientific paper
IN their description of the solar radio emissions from the great sunspot of February 1946, Appleton and Hey1 pointed out that a number of sudden enhancements of intensity, observed at about 5 metres wave-length, occurred simultaneously with increases in D-layer ionization as indicated by fade-outs on long-distance radio-communication circuits. This increased ionization, which is believed to be due to enhanced solar ultra-violet radiations, strongly absorbs the radio communication waves (of the order of 20 metres wave-length) but does not produce any marked absorption of the solar radio emissions at wave-lengths of 5 metres or less.
Hey J. S.
Parsons S. J.
Phillips J. W.
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