. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography 22-10 Remote Sensing of the Ocean 600»K 500°K 400°K. 0 10 15 20 25 30 Figure Spectral radiance from a blackbody versus wavelength, in micrometers, with temperature as a parameter (after Wolfe, 1965). present in the daytime. This is apparent from () which compares these two radiation sources for various reflectivity and emissivity values. Because of this reason the NIMBUS HRIR /urn data are contaminated with sunlight during the day-
. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography 22-10 Remote Sensing of the Ocean 600»K 500°K 400°K. 0 10 15 20 25 30 Figure Spectral radiance from a blackbody versus wavelength, in micrometers, with temperature as a parameter (after Wolfe, 1965). present in the daytime. This is apparent from () which compares these two radiation sources for various reflectivity and emissivity values. Because of this reason the NIMBUS HRIR /urn data are contaminated with sunlight during the day-side of the orbit. ITOS-I and NOAA-I have side stepped this problem of solar contamination by using the jum wavelengths. Atmospheric Correction Models In order to obtain accurate sea-surface temperature information from satellite IR window data, it is necessary to correct the measurement for the effect of the atmosphere on the upward IR radiance from the sea surface. That effect is to absorb and re-emit a portion of the sea surface radiance. To determine the error introduced by the atmosphere, some investigators have made theoretical calculations with radiative transfer models of the upward spectral radiance in the atmosphere. They have examined the error under various (a) assumed model atmospheres with varying temperature and water vapor and (b) zenith angles. They have incorporated the significant absorbing gases. Two such studies have been reported in the past year; these will be discussed here. To my knowledge, they are the most useful attempts at solution of the atmospheric problem which have been reported to date. 922. 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. Environment
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