Letter | Published:

Measurement of Radio Sources at Centimetre Wave-lengths

Nature volume 199, page 1177 (21 September 1963) | Download Citation

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Abstract

IN future, the limit of detection of faint radio sources, at wave-lengths of 10 cm and less, is likely to be set by the radiation from water vapour and rain in the troposphere1,2. The dominant factor is the minute-to-minute fluctuations in received power, which may be as much as 2° K at λ 3.7 cm. These fluctuations are greatly in excess of the receiver noise fluctuations, and may destroy all the benefit of using a modern low-noise amplifier such as a maser.

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References

  1. 1.

    , Pub. N.R.A.O., Greenbank, U.S.A., 1, No. 14 (Oct. 1962).

  2. 2.

    , and , Bell Syst. Tech. J., 40, 1331 (1961).

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Affiliations

  1. Jodrell Bank, Macclesfield, Cheshire.

    • R. G. CONWAY

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  1. Search for R. G. CONWAY in:

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DOI

https://doi.org/10.1038/1991177a0

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