Water Vapor Radiometer: Measuring Instrument of Atmospheric Brightness Temperature

Results are presented for pilot studies of the error in measuring atmospheric brightness temperature at frequencies 20.7 and 31.4 GHz in the vicinity of water vapor emission lines. The accuracy of atmospheric brightness temperature measurements was evaluated using the water vapor radiometer at the Z...

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Bibliographic Details
Published in:Measurement techniques 2017-08, Vol.60 (5), p.497-504
Main Authors: Arsaev, I. E., Bykov, V. Yu, Il’in, G. N., Yurchuk, E. F.
Format: Article
Language:English
Subjects:
Analytical Chemistry
Characterization and Evaluation of Materials
Measurement Science and Instrumentation
Physical Chemistry
Physics
Physics and Astronomy
Radio Measurements
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Summary:Results are presented for pilot studies of the error in measuring atmospheric brightness temperature at frequencies 20.7 and 31.4 GHz in the vicinity of water vapor emission lines. The accuracy of atmospheric brightness temperature measurements was evaluated using the water vapor radiometer at the Zelenchukskaya observatory. Measurements were made using the PNShI200 wide-aperture low-temperature noise generator, a working standard for the unit of equivalent noise temperature. The requirements for radiophysical characteristics and accuracy of reproduction of a unit of noise temperature were formulated for prospective reference wide-aperture low-temperature noise generators.
ISSN:0543-1972
1573-8906
DOI:10.1007/s11018-017-1224-1