大气气溶胶红外散射透过率计算研究

吴辉阳; 王泽洋; 黄兴军; 张艳; 石孝楠; 张云飞

大气气溶胶红外散射透过率计算研究

1.
北京航空航天大学航空科学与工程学院, 北京 100191
2.
北京机电工程研究所, 北京 100074

详细信息

作者简介:
吴辉阳（1996-），男，河南周口人，硕士研究生，主要从事红外隐身和大气红外辐射研究。E-mail：wuhuiyang@buaa.edu.cn

通讯作者:
张云飞（1964-），男，湖南长沙人，教授，研究方向为飞机总体设计、隐身技术、无人机设计。E-mail：cloud_zhang@buaa.edu.cn

中图分类号: TN012
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- 被引次数: 0
出版历程
- 收稿日期: 2020-03-30
- 修回日期: 2020-06-04
- 刊出日期: 2022-02-20

Calculation of Infrared Scattering Transmittance of Aerosol

1.
School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, China
2.
Beijing Institute of Mechanical and Electronic Engineering, Beijing 100074, China

摘要

摘要: 红外辐射在大气中传播时大气气溶胶散射是能量衰减的原因之一。通过考虑气溶胶密度随高度变化，结合大气能见度参数，建立了红外线在水平均匀传播和斜程传播下的大气气溶胶散射透过率计算方法。水平均匀传输下，在中长波波段对大气气溶胶散射透过率采用常规积分求均值方法计算，与采用波长中值的工程计算公式结果对比，表明工程计算公式具有足够的工程精度；对于斜程传播情况，通过对高度积分得到红外线大气气溶胶散射透过率的斜程工程计算公式。计算分析了探测器高度、波段和大气能见度对大气气溶胶散射透过率的影响。本文对于建立自主的精确大气透过率计算模型、计算机载探测器对红外目标的下视探测性能以及深入了解大气气溶胶散射透过率的影响因素具有重要意义。
- 红外辐射 /
- 气溶胶密度 /
- 大气散射透过率 /
- 能见度
Abstract: Atmospheric scattering is one of the factors influencing the energy attenuation of infrared radiation in the atmosphere. Considering the variation in the aerosol density with altitude, the calculation method of atmospheric scattering transmittance is developed for the horizontal homogeneous transmission and oblique transmission integrating the atmospheric visibility parameters. In the case of horizontal homogeneous transmission, the average transmission method of atmospheric aerosol scattering transmission in the mid-long wave band is calculated by performing conventional integration. Compared with the result of the engineering calculation formula using the median wavelength, the engineering calculation formula is shown to have sufficient engineering accuracy. For the case of slope propagation, a slope engineering calculation formula for infrared atmospheric aerosol scattering transmittance was obtained by integrating the altitude. The effects of the altitude, waveband, and visibility on the atmospheric scattering transmittance are calculated and analyzed. This study has great significance for the establishment of an independent accurate atmospheric transmittance calculation model, the downward-looking detection performance of computer-borne detectors for infrared targets, and provides a good understanding of the factors influencing atmospheric aerosol scattering transmittance.
- infrared radiation /
- aerosol density /
- atmospheric scattering transmittance /
- visibility

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图 1 海拔高度对大气气溶胶散射透过率影响（两波段，$ V $=23 km）

Figure 1. Influence of altitude on atmospheric aerosol scattering transmittance (two bands, $ V $=23 km)

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图 2 海拔高度对大气气溶胶散射透过率影响（两波段，$ V $=10 km）

Figure 2. Influence of altitude on atmospheric aerosol scattering transmittance (two bands, $ V $=10 km)

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图 3 海拔高度对大气气溶胶散射透过率影响（两波段，$ V $=5 km）

Figure 3. Influence of altitude on atmospheric aerosol scattering transmittance (two bands, $ V $=5 km)

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图 4 大气气溶胶散射透过率与波长关系

（$ h $=1 km，$ V $=10 km，$ x $=10 km）

Figure 4. Relationship between atmospheric aerosol scattering transmittance and wavelength

($ h $=1 km, $ V $=10 km, $ x $=10 km)

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图 5 海拔高度对大气气溶胶散射透过率影响

（$ \lambda $=11 μm，$ V $=10 km）

Figure 5. Influence of altitude on atmospheric aerosol scattering transmittance

($ \lambda $=11 μm, $ V $=5 km)

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图 6 视线仰角对大气气溶胶散射透过率影响（两波段，$ V $=23 km）

Figure 6. Influence of line-of-sight elevation angle on atmospheric aerosol scattering transmittance (two bands, $ V $=23 km)

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图 7 视线仰角对大气气溶胶散射透过率影响（两波段，$ V $=10 km）

Figure 7. Influence of line-of-sight elevation angle on atmospheric aerosol scattering transmittance (two bands, $ V $=10 km)

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图 8 大气气溶胶散射波段透过率随仰角的变化（两种能见度，$ x $=20 km）

Figure 8. Variation of transmittance of atmospheric aerosol scattering band with elevation angle (two visibility, $ x $=20 km)

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