细水雾在大气窗口波段的光谱与谱带辐射特性规律

研究了细水雾在3~5m和8~14m这两个大气窗口波段的红外辐射特性规律。通过对光谱辐射特性规律的研究，发现光谱散射系数与光谱吸收系数近似以1/2光谱消光系数为轴成对称关系，并且随着细水雾均值粒径的增大，对称关系趋于明显；通过对谱带辐射特性规律的研究，建立了细水雾在3~5m和8~14m两个波段内谱带衰减系数的近似计算公式；经过误差分析发现，细水雾均值粒径大于20m时，该近似公式可以保证三种谱带衰减系数的相对误差不超过5%。

Spectral and bands radiation characteristics of water sprays in two infrared atmospheric windows

The law of infrared spectral and bands radiation characteristics of water sprays in the atmospheric windows, 3-5 m and 8-14 m, was researched. Through the research on spectral radiation characteristics of water sprays, a kind of approximate symmetry relationship between spectral scattering coefficients and spectral absorption coefficients was discovered. The axis of symmetry is just the 1/2 of the spectral extinction coefficients. The symmetry relationship was found to be more obvious along with the increase of the average droplets radiuses. Though the research on the bands radiation characteristics in 3-5 m and 8-14 m of water sprays, a group of approximate formulas for calculating the bands attenuation coefficients including extinction, scattering and absorption were founded. It's proved by error analyzing that the method mentioned above can ensure the relative errors of the three bands attenuation coefficients be less than 5%.