Abstract
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 × 10â19 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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References
Pawsey, Nature, 157, 158 (1946).
Hey, Nature, 157, 47 (1946).
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REBER, G. Solar Radiation at 480 Mc./sec. Nature 158, 945 (1946). https://doi.org/10.1038/158945a0
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DOI: https://doi.org/10.1038/158945a0
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