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In the above paper, a highly stable noise-balancing radiometer at 2.7 GHz for satellite applications, with a claimed absolute measurement precision of 0.1 K, is reported. The purpose of this letter is to indicate a source of calibration error which can be seriously underestimated.
Microwave Theory and Techniques, IEEE Transactions on (Volume:23 , Issue: 5 )
Date of Publication: May 1975