. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography Infrared Detection 22-5 HIGH RESOLUTION INFRARED RADIOMETER HRIR - TO 4 2//; MEASUREMENTS NIMBUS II, ORBIT 238 9 .. JUNE 2, 1966. ,... <^33k Figure Northern boundary of the Gulf Stream as observed by NIMBUS II (after Allison, et al, 1967). radiative efficiency of a surface, the spectral emissivity ranges from near zero for poor radiators to unity for perfect radiators. Using (22:1) and (22:2) calculations can be obtained of the spectral
. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography Infrared Detection 22-5 HIGH RESOLUTION INFRARED RADIOMETER HRIR - TO 4 2//; MEASUREMENTS NIMBUS II, ORBIT 238 9 .. JUNE 2, 1966. ,... <^33k Figure Northern boundary of the Gulf Stream as observed by NIMBUS II (after Allison, et al, 1967). radiative efficiency of a surface, the spectral emissivity ranges from near zero for poor radiators to unity for perfect radiators. Using (22:1) and (22:2) calculations can be obtained of the spectral radiant emittance of any surface of known temperature and spectral emissivity. However, the spectral radiant emittance of a surface does not describe completely the electro- magnetic energy emanating from that surface. The reason for this is that greybody surfaces reflect as well as emit energy. This is shown by a form of Kirchhoffs law which states that if a surface is optically opaque, then the spectral reflectivity, p^, and spectral emissivity, e^, of that surface have the simple relation of P\ = l-e. (22:3) Thus, infrared radiation from a surface is due both to self-emission of the surface and reflection of a portion of the radiation incident on the surface. 917. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Atlantic Oceanographic and Meteorological Laboratories; Pacific Oceanographic Laboratories; United States. Environmental Science Services Administration. Research Laboratories; Environmental Research Laboratories (U. S. ). Washington, D. C. : U. S. Dept. of Commerce, Environmental Science Services Administration, Research Laboratories : For sale by Supt. of Docs. U. S. G. P. O.
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