Empirical adjustment for atmospheric transmittances based on calculated and measured radiances

Details Empirical adjustment for atmospheric transmittances based on calculated and measured radiances Empirical adjustment for atmospheric transmittances based on calculated and measured radiances

Mar 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jqsrt..33..227p&link_type=abstract

Journal of Quantitative Spectroscopy and Radiative Transfer (ISSN 0022-4073), vol. 33, March 1985, p. 227-236.

Computer Science

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Atmospheric Optics, Atmospheric Temperature, Radiance, Transmittance, Correction, Infrared Radiometers, Radiative Transfer, Satellite Sounding

Scientific paper

This study summarizes important aspects of transmittance correction for the high-resolution infrared detector aboard the TIROS-N satellite. Accurate transmittances for infrared channels are necessary for the determination of atmospheric temperature profiles based on solution of the radiative transfer equation. The global means of the difference between the observed and calculated radiances for HIRS channels were calculated; the differences between these could not be explained on the basis of channel noise. An empirical correction of the transmittances was determined, and it was found that the optimum correction depended on latitude zones and other factors. In order to find a correction that is valid globally, an attempt was made to relate the correction for a given channel to the temperature of the atmospheric-pressure level at which the channel-weighting function peaks. The results did not indicate a clear correlation, and the scatter of points was beyond acceptable range.

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