夜間天空背景及云層紅外輻射測(cè)量分析
發(fā)布時(shí)間:2018-09-09 11:18
【摘要】:采用中波、長(zhǎng)波紅外熱像儀對(duì)夜間無云天空背景及云層背景紅外輻射亮度進(jìn)行了測(cè)量。無云天空背景中波波段輻射亮度在0.58~1.30 W·m~(-2)·sr~(-1),長(zhǎng)波波段輻射亮度在6.61~15.29 W·m~(-2)·sr~(-1)。由于夜間條件下無太陽輻射影響,相同俯仰觀測(cè)角條件下,0°~360°各個(gè)方向天空背景輻射亮度基本一致。從無云區(qū)到有云區(qū),隨著云層厚度的增加,其輻射亮度逐漸增大。相對(duì)于無云背景,中波波段云層中心輻射亮度增加了1.5%,長(zhǎng)波波段云層中心輻射亮度增加了14.2%,長(zhǎng)波波段云層對(duì)天空背景輻射影響更加顯著。
[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 擄~ 360 擄. 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.
【作者單位】: 中國(guó)洛陽電子裝備試驗(yàn)中心;
【分類號(hào)】:TN21
[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 擄~ 360 擄. 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.
【作者單位】: 中國(guó)洛陽電子裝備試驗(yàn)中心;
【分類號(hào)】:TN21
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