摘要
利用逐线积分方法,建立了一种均匀大气中氧气A吸收带平均透过率快速计算模型。模型采用等波数间隔取样,能根据大气温度和压强自动选择谱线线形,并利用直和模型进行快速近似计算Voigt线形函数。在不同大气模式下设置不同传输路径,利用该模型计算氧气A带平均透过率与路径长度关系曲线,并将计算结果与Modtran软件计算结果进行对比。从对比结果可知,不同路径下模型计算的平均氧气透过率最大相对误差均小于2%,计算时间均小于1 s,具有较高的准确度和计算实时性。计算结果表明该模型能够在均匀大气中对氧气A带平均透过率进行快速准确计算。
A fast calculation model for the average transmission of the oxygen A absorption band in a homogeneous atmosphere is established using the line-by-line integration method. In this model, the sampling interval is set constant, the spectral line profile can be selected automatically according to the pressure and the temperature, and an analytical sum formula is used to approximate the Voigt profile, which improves the efficiency of the calculation significantly. To test the accuracy and adaptability of this proposed model, several different transmission paths are set in three different atmospheric modes, and the proposed model is used to calculate the relationship between the average transmission of the oxygen A absorption band and the path length. The results are compared with the calculations of modtran, which showed that the maximum relative error of the average transmission is less than 2%, and the calculation time is less than 1 s. These calculation results showed that this proposed model can quickly and accurately calculate the average transmission of the oxygen A absorption band in a homogeneous atmosphere.
作者
刘秉琦
余皓
闫宗群
张瑜
陈一超
张帅
LIU Bingqi;YU Hao;YAN Zongqun;ZHANG Yu;CHEN Yichao;ZHANG Shuai(Department of Electronics and Optics Engineering,Army Engineering University Shijiazhuang Campus,Shijiazhuang 050003,China;Department of Control Engineering,Academy of Armored Force Engineering,Beijing 100072,China;Beijing Institute of System Engineering,Beijing 100101,China)
出处
《红外技术》
CSCD
北大核心
2018年第11期1056-1060,1064,共6页
Infrared Technology
关键词
气体光谱
逐线积分
氧气A吸收带
平均透过率
gas spectra
line-by-line
the oxygen A absorption band
average transmission
