夜间天空背景及云层红外辐射测量分析

发布时间：2018-09-09 11:18

【摘要】：采用中波、长波红外热像仪对夜间无云天空背景及云层背景红外辐射亮度进行了测量。无云天空背景中波波段辐射亮度在0.58~1.30 W·m~(-2)·sr~(-1),长波波段辐射亮度在6.61~15.29 W·m~(-2)·sr~(-1)。由于夜间条件下无太阳辐射影响,相同俯仰观测角条件下,0°~360°各个方向天空背景辐射亮度基本一致。从无云区到有云区,随着云层厚度的增加,其辐射亮度逐渐增大。相对于无云背景,中波波段云层中心辐射亮度增加了1.5%,长波波段云层中心辐射亮度增加了14.2%,长波波段云层对天空背景辐射影响更加显著。
[Abstract]:The infrared radiation brightness of night cloudless sky background and cloud background was measured with medium wave and long wave infrared thermal imager. In cloudless sky, the radiance of wave band is 0.58 ~ (-1) W ~ (-2) sr~ (-1), and that of long wave band is 6.61 ~ 1 ~ (15.29) W m ~ (-2) sr~ (-1). Because there is no effect of solar radiation at night, the background radiance of the sky is basically the same under the same pitch observation angle of 0 掳~ 360 掳. From the cloud free region to the cloud area, the radiation brightness increases with the increase of cloud thickness. Compared with the cloudless background, the central radiance of the cloud in the medium wave band increases by 1.5 and the central radiance of the cloud in the long wave band increases by 14.2.The effect of the clouds in the long wave band on the sky background radiation is more significant.
【作者单位】：中国洛阳电子装备试验中心;
【分类号】：TN21

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