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Definition of the system temperature |
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| | Various sources contribute to the incoming power, a measure of which is the so-called "system temperature". |
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| | where the different noise contributions originate from: |
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= 3 K microwave and galactic background
= Atmospheric emission
= Ground radiation scattering into the feed
= Losses in the feed and input waveguide
= Injected calibration signal
= Thermal receiver/electronics noise ASKAP
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