Abstract
THE definition of the absolute radiation scale with respect to fundamental physical concepts can be carried out by employing either a standard emitter or a standard detector of radiant flux. Standard emitters, frequently referred to as black-body sources, are chiefly employed in calibrating low level irradiance measurements. Standard detectors are more suitable for measuring the relatively high irradiance levels of solar flux.
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WILLSON, R. Experimental Comparisons of the International Pyrheliometric Scale with the Absolute Radiation Scale. Nature 239, 208–209 (1972). https://doi.org/10.1038/239208a0
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DOI: https://doi.org/10.1038/239208a0
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