. . . . . . . . . . . . "SDN:P07::CF12N595" . . "Emissivity is the ratio of the power emitted by an object to the power that would be emitted by a perfect black body having the same temperature as the object. The emissivity is assumed to be an integral over all wavelengths, unless a coordinate of radiation_wavelength or radiation_frequency is included to specify either the wavelength or frequency. The surface called \"surface\" means the lower boundary of the atmosphere."@en . "" . . . "surface_microwave_emissivity"@en . "accepted"@en . . .