雾对10.6μm红外辐射的衰减特性研究

ATTENUATION DUE TO FOG FOR 10.6μm WAVELENGTH

基于gamma雾滴尺寸分布模型及辐射雾和平流雾含水量与能见度的经验关系 ,计算并回归得到了平流雾和辐射雾对 10 6 μm红外辐射的衰减与含水量和能见度的关系 ,其对浓辐射雾得到的雾衰减与含水量的线性关系与文献所给实验结果和半经验公式均有很好的一致性 .最后对雾的红外衰减和可见光衰减进行了比较 ,结果表明浓平流雾对 10 6 μm红外辐射的雾衰减大于可见光的雾衰减 .

Based on gamma fog drop size distribution model and empirical relation of water content and visibility of radiation fog and advection fog, the attenuation due to fog was calculated and analyzed for 10.6μm infrared wavelength. The empirical relations between fog attenuation and water content as well as visibility were derived through regression analysis. The linear relation between fog attenuation and water content for dense radiation fog is in good agreement with available results of experiments and semi-empirical formula. Finally, the fog attenuation between 10.6μm and visible wavelength was compared, and the results show that the attenuation at 10.6μm is greater than that at visible wavelength for dense advection fog.