Emissivity

Description Emissivity is defined as the wavelength (or wave-number) dependent ratio of energy radiated (see radiance for more information) by a non-energy-generating material to that radiated by a black body of the same temperature. Since emissivity is a ratio, it has values from 0.0 to 1.0, where any value outside this range is physically impossible. THEMIS radiance data can be converted to emissivity by thm.themis_emissivity.

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