New temperature reference avoids need to physically remove antenna and replace it with calibrating termination. Device is piece of porous microwave absorber fitted with cap of nonporous plastic foam. Absorbent material is soaked with cryogen. Procedure ensures that temperature at which microwaves are absorbed is exactly that of cryogen.
Temperature reference for microwave radiometer calibration
NASA Tech Briefs ; 1 , 4
1977-03-01
Miscellaneous
No indication
English
Calibration target for temperature radiometer
NTRS | 1978
|Radiometer Calibration Procedure and Beacon Attenuation Estimation Reference Level
British Library Conference Proceedings | 1995
|Tipping calibration method for K-band hyperspectral microwave radiometer
British Library Online Contents | 2014
|