A balloon borne 19-GHz radiometer

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Abstract

The design and performance of a 19-GHz one-horn maser radiometer is discussed. The antenna is a lensed, conical horn with 3° angular resolution. The radiometer is stabilized by chopping against an internal cold load. A novel chopping scheme allows continual calibration of maser gain fluctuations with only a modest penalty in noise. The method of calibrating this instrument is described. The instrument has been used to map the sky with an equivalent blackbody temperature sensitivity of 1 mK per 3°×3°resolution element.

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Boughn, S. P., Cheng, E. S., Cottingham, D. A., & Fixsen, D. J. (1990). A balloon borne 19-GHz radiometer. Review of Scientific Instruments, 61(1), 158–164. https://doi.org/10.1063/1.1141867

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