. "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. \"longwave\" means longwave radiation."@en . . . "SDN:P07::CF12N594" . . "2009-07-06 15:41:29.0" . "accepted"@en . "1" . "SDN:P07::CF12N594" . . "2009-07-06 15:41:29.0" . "surface_longwave_emissivity"@en . "" . . . "1" . . "false" . . . . "SDN:P07::CF12N594" .