Rapid Calculation of Microwave Opacity and Transmittance for Water-Vapor Atmospheric-Sounding Channels

By approximating a line-by-line calculation of atmospheric transmittance with simplified analytical expressions for effective opacity, upwelling brightness temperatures for five passbands in the 183-GHz water-vapor line are obtained with the fidelity of 0.04 K or better in the mean and 0.06 K or bet...

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Bibliographic Details
Published in:IEEE transactions on geoscience and remote sensing 2022, Vol.60, p.1-4
Main Author: Rosenkranz, Philip W.
Format: Article
Language:English
Subjects:
Brightness temperature
Gases
Mathematical analysis
Millimeter-wave propagation
Ocean circulation
Opacity
Ozone
Passband
passive micro-wave remote sensing
radiative transfer
Shape
Temperature measurement
Transmittance
Upwelling
Vapors
Water
Water vapor
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Summary:By approximating a line-by-line calculation of atmospheric transmittance with simplified analytical expressions for effective opacity, upwelling brightness temperatures for five passbands in the 183-GHz water-vapor line are obtained with the fidelity of 0.04 K or better in the mean and 0.06 K or better standard deviation. The effect of weak ozone lines in or near the passbands is included by calculating their passband-average opacity. The passband-average opacity due to the water line is corrected to passband-average transmittance by a linear adjustment.
ISSN:0196-2892
1558-0644
DOI:10.1109/TGRS.2022.3164778