不同地域大气对中远红外辐射传输的影响

发布时间：2018-02-23 06:19

本文关键词： 大气光学大气红外辐射大气廓线气溶胶大气透射率目标背景对比度　出处：《光学学报》2017年04期 　论文类型：期刊论文

【摘要】：在分析实际大气环境参数的差异和目标-背景辐射强度的基础上,利用MODTRAN模式分析了东海、西北区域3.9μm和9.2μm波段的大气透射率和目标背景对比度的逐月分布特征;为了分析实际大气、气溶胶效应对目标-背景辐射传输的综合影响,结合局部地区月平均环境参数进一步探讨了上述两个区域内气溶胶对3.9μm和9.2μm波段的大气透射率和目标背景对比度分布的影响。结果表明,大气温度、水汽混合比等参数对大气透射率和目标背景对比度有影响,东海区域目标背景对比度比西北区域的小;3.9μm处两区域的目标背景对比度不仅比9.2μm处的小,而且受到气溶胶的衰减作用比9.2μm处的强,因此在目标识别中应优先考虑使用9.2μm作为工作波段。
[Abstract]:Based on the analysis of the difference of the actual atmospheric environmental parameters and the object-background radiation intensity, the monthly distribution characteristics of the atmospheric transmittance and the target background contrast in 3.9 渭 m and 9.2 渭 m bands in the East China Sea and Northwest China Sea are analyzed by using the MODTRAN model. In order to analyze the effect of aerosol effect on the radiative transport between target and background, The influence of aerosols on the atmospheric transmittance and target background contrast distribution in 3.9 渭 m and 9.2 渭 m bands is further discussed by using the local average monthly environmental parameters. The results show that the atmospheric temperature, The water vapor mixing ratio has an effect on the atmospheric transmittance and the target background contrast. The target background contrast in the East China Sea region is not only smaller than that in the two regions at 3.9 渭 m in the northwest region, but also in the 9.2 渭 m region. Moreover, aerosol attenuation is stronger than that at 9.2 渭 m, so 9.2 渭 m should be preferred in target recognition.
【作者单位】：解放军理工大学气象海洋学院;空军装备研究院航空气象防化研究所;
【分类号】：TN215

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