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antenna temperature


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A measure of signal strength in radio astronomy. It is defined as the temperature of a black-body enclosure which, if completely surrounding a radio telescope, would produce the same signal power as the source under observation. Antenna temperature is a property of the source, not of the antenna itself. Where a uniform extended source fills the telescope beam, the antenna temperature is equal to the brightness temperature of the source.

Subjects: Astronomy and Astrophysics.


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