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Apparent Relation between Solar Activity and the 440-Mc/s Radar Distance of Venus

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Abstract

A CURIOUS correlation (Fig. 1) has been found between the systematic variations in the astronomical unit, as derived from radar observations of Venus at 440 Mc/s (68 cm)1, and the solar 20-cm flux as measured at the Heinrich Hertz Institut in Berlin-Adlers-hof2. The 20-cm flux is known to be a good indicator of solar activity, and there is evidence that solar decimetre radiation (slowly varying component) is related to both the solar extreme ultra-violet flux and the solar wind intensity3,4.

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References

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Authors and Affiliations

  1. University Observatory, Bonn

    W. PRIESTER, M. ROEMER & TH. SCHMIDT-KALER

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  1. W. PRIESTER
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  2. M. ROEMER
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  3. TH. SCHMIDT-KALER
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PRIESTER, W., ROEMER, M. & SCHMIDT-KALER, T. Apparent Relation between Solar Activity and the 440-Mc/s Radar Distance of Venus. Nature 196, 464–465 (1962). https://doi.org/10.1038/196464a0

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