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Australian Journal of Physics Australian Journal of Physics Society
A journal for the publication of original research in all branches of physics
RESEARCH ARTICLE

A Measurement of the Sky Brightness Temperature at 408 MHz

RM Price

Australian Journal of Physics 22(5) 641 - 654
Published: 1969

Abstract

The absolute value of the background brightness temperature has been measured at a radiofrequency of 408 MHz. Observations were made with a large pyramidal "standard gain" horn aerial and the aerial temperatures were compared direct with the temperature observed with the receiver input connected to a matched resistive load of known temperature. For the region within 240 of the south celestial pole an average brightness temperature of 23· 9°K was obtained. Observations of northern regions indicate that values from previous determinations at northern latitudes are 4-5 degK too high.

https://doi.org/10.1071/PH690641

© CSIRO 1969

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