| 风场下自然地表红外辐射统计特性 |
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| 引用本文： | 饶瑞中,宋正方.风场下自然地表红外辐射统计特性[J].红外与毫米波学报,1991,10(2):141-146. |
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| 作者姓名： | 饶瑞中 宋正方 |
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| 作者单位： | 中国科学院安徽光学精密机械研究所 安徽(饶瑞中)，中国科学院安徽光学精密机械研究所 合肥(宋正方) |
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| 摘 要： | 考虑风场存在时热对流的作用,并根据自然地表的热平衡方程分析了自然地表红外辐射的统计特性,分析中采用一级近似,结果表明,风场的存在将使地表温度的概率分布产生明显改变,峰值及平均温度趋近地表附近空气的稳定温度,并导致地表热辐射图像对比度的显著降低,文中还提出了热对流效应的饱和现象。
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| 关 键 词： | 风场 地表 红外辐射 热图像 统计 |
NATURAL TERRAIN INFRARED RADIATION STATISTICS IN A WIND FIELD |
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| RAO RUIZHON SONG ZHENGFANG.NATURAL TERRAIN INFRARED RADIATION STATISTICS IN A WIND FIELD[J].Journal of Infrared and Millimeter Waves,1991,10(2):141-146. |
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| Authors: | RAO RUIZHON SONG ZHENGFANG |
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| Abstract: | Considering the heat convection in a wind field, the infrared radiation statistics of natural terrain is analyzed by the heat balance equation. The first-order approximation is used for the radiation term in the equation. The results show that the heat convection will change the statistical distribution of the radiance in the thermal image of natural terrain. With the increase of wind speed, the most probable and average temperature will trend to the steady air temperature, and the contrast of the thermal image will decrease. The saturation phenomena of the convection effect are pointed out. |
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| Keywords: | Thermal image infrared radiation terrain wind field |
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