Physics
Scientific paper
Dec 1946
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1946natur.158..945r&link_type=abstract
Nature, Volume 158, Issue 4026, pp. 945 (1946).
Physics
6
Scientific paper
FOR several months past, daily measurements of radio waves from the sun at 480 Mc./sec. have been made here at true noon. The normal observed intensity is about 5 × 10-19 watt/sq. cm. per Mc./sec., corresponding to an apparent solar temperature of about a million degrees. Superimposed on this are slow day-to-day variations of about 15 per cent which are quite closely correlated with the apparent area of sunspots. This variation is no doubt the same phenomenon on a greatly reduced scale which was observed by Pawsey1. The apparent solar diameter is about ½°, and no observable variation (less than 0.1°) has been found from day to day.
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