A Narrow Beam Spectral Radiometer to Measure Atmospheric Emission from 4 to 14.5 vm

A. J. Wardrop School of Physics and Astronomy, University of Minnesota, Minneapolis 55455

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H. T. Mantis School of Physics and Astronomy, University of Minnesota, Minneapolis 55455

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Abstract

A spectral radiometer to measure atmospheric radiance has been constructed using a helium-cooledphotoconductor detector. The radiometer is of medium resolution (δλ/λ ∼ 2%) and its advantages areits narrow beam ∼10-6 sr) and accuracy in the absolute radiance measurement (1% of a blackbody atambient temperature). Some examples of spectra made with the instrument are presented.

Abstract

A spectral radiometer to measure atmospheric radiance has been constructed using a helium-cooledphotoconductor detector. The radiometer is of medium resolution (δλ/λ ∼ 2%) and its advantages areits narrow beam ∼10-6 sr) and accuracy in the absolute radiance measurement (1% of a blackbody atambient temperature). Some examples of spectra made with the instrument are presented.

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