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A Novel Nolse-Adding Radiometer

Published online by Cambridge University Press:  25 April 2016

Alan E. Wright ,
G. J. Nelson ,
R. T. Stewart ,
O.B. Slee ,
J. D. Murray ,
D. J. Cooke  and
G. J. Carrad
Alan E. Wright
Affiliation:
Division of Radiophysics, CSIRO, Sydney
G. J. Nelson
Affiliation:
Division of Radiophysics, CSIRO, Sydney
R. T. Stewart
Affiliation:
Division of Radiophysics, CSIRO, Sydney
O.B. Slee
Affiliation:
Division of Radiophysics, CSIRO, Sydney
J. D. Murray
Affiliation:
Division of Radiophysics, CSIRO, Sydney
D. J. Cooke
Affiliation:
Division of Radiophysics, CSIRO, Sydney
G. J. Carrad
Affiliation:
Division of Radiophysics, CSIRO, Sydney
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Abstract

Very sensitive low-noise amplifiers designed to receive transmissions from spacecraft are not necessarily suitable receivers for radio astronomy. In the former case a good signalto- noise ratio is required so that high data rates can be achieved. In the latter the ratio of signal to noise power may be as low as 10-4 and the stability of receiver gain and that of ail sources of noise during long integration times become of equal importance.

This paper describes a novel solution to the problem, which allowed important astronomy to be performed while the ruby maser receivers belonging to the European Space Agency were installed on the Parkes radio telescope for an extended period of time.

Type
Contributions
Information
Publications of the Astronomical Society of Australia , Volume 6 , Issue 4 , 1986 , pp. 512 - 516
Copyright
Copyright © Astronomical Society of Australia 1985

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References

Bunton, J. D., Stewart, R. T., Slee, O.B., Nelson, G. J., Wright, A. E., Corbin, J. B., Brown, D. R.and Hall, P. J., 1986, Proc. Astron. Soc. Aust., 6, 316.Google Scholar
Slee, O. B., Nelson, G. J., Innis, J. L., Stewart, R. T., Vaughan, A. and Wright, A. E., 1986, Proc. Astron. Soc. Aust., 6, f312.Google Scholar