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

被引：1
|
作者：
Rosenkranz, Philip W. [1 ]
机构：
[1] MIT, 77 Massachusetts Ave, Cambridge, MA 02139 USA
来源：
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING | 2022年 / 60卷
关键词：
Passband; Gases; Water; Temperature measurement; Standards; Shape; Brightness temperature; Millimeter-wave propagation; passive micro-wave remote sensing; radiative transfer; RADIATIVE-TRANSFER MODEL;
D O I：
10.1109/TGRS.2022.3164778
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
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.
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页数：4
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