Absolute calibration of solar radio flux density at 35GHz

Details Absolute calibration of solar radio flux density at 35GHz Absolute calibration of solar radio flux density at 35GHz

Jun 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982acasn..23..110.&link_type=abstract

nai,Acta Astronomica Sinica, vol. 23, June 1982, p. 110-117. In Chinese, with abstract in English.

Astronomy and Astrophysics

Astronomy

Calibrating, Millimeter Waves, Radiant Flux Density, Radiation Measurement, Solar Radio Emission, Black Body Radiation, Cryogenics, Liquid Nitrogen, Microwave Emission, Random Errors

Scientific paper

The absolute measurement of solar radio flux density at 35 GHz was carried out using a standard gain-horn and two precise standard noise sources. A pyramid-shaped microwave blackbody was made of foam polyurethane; its reflection coefficient in the direction of perpendicular incidence was -50 dB at 8.6 mm wavelength. Soaked in liquid nitrogen, this blackbody may be a precise and stable cryogenic standard noise source. During February 11-20, 1980, absolute measurements were made repeatedly with calibration at the aperture plane of the horn. The mean flux density of solar radio emission was found to be 2548 sfu, with a four percent systematic error and an eleven percent random error.

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