多种特定环境中水云和雾的光学特性

Optical properties of water clouds and fog in various particular environments

利用OPAC软件,对2种激光雷达波下多种特定环境中水云和雾的光学特性参量随水滴数浓度变化的规律进行研究.仿真实验结果表明:2种激光雷达波长下水云和雾的消光系数随水滴数浓度线性递增,但对同一对象来说,1500 nm波长下消光系数对水滴数浓度的变化率大于550 nm波长下消光系数对水滴数浓度的变化率;从定性角度看,散射系数随水滴数浓度变化的规律与消光系数随水滴数浓度变化的规律基本一致;2种激光雷达波长下水云和雾的吸收系数随水滴数浓度线性递增,但对同一对象来说,1500 nm波长下吸收系数对水滴数浓度的变化率远大于550 nm波长下吸收系数对水滴数浓度的变化率;2种激光雷达波长下水滴数浓度增加时,激光雷达比均无明显变化.

OPAC software was used to research the variational regularity of optical property parameters of water cloud and fog in various particular environments with droplet number concentration under two kinds of laser radar waves.The simulation experiment results showed that the extinction coefficients of cloud water and fog at the two radar wavelengths increased linearly with the droplet number concentration,but for the same object,the change rate of extinction coefficient on droplet number concentration at 1500 nm was greater than that at 550 nm.From the qualitative point of view,the variation law of scattering coefficient with droplet number concentration was basically the same as that of extinction coefficient with droplet number concentration.The absorption coefficients of water cloud and fog of the two laser radar wavelengths increased linearly with droplet number concentration,but for the same object,the change rate of absorption coefficient on droplet number concentration at 1500 nm was much higher than that at 550 nm.The laser radar ratio had no significant change when the concentration of droplet number increased at two laser radar wavelengths.