摘要
从某一光谱波段在大气传输中的平均衰减系数定义出发,建立了更为准确的大气平均衰减系数表达式,并分析影响大气平均衰减系数的因素,以8～12μm波段为例进行数值模拟,结果表明:目标辐射源温度、光谱传输距离和气象条件对大气平均衰减系数都有较大影响。
Starting from the definition of atmospheric average attenuation coefficient of certain spectral waveband, a more exact expression of atmospheric average attenuation coefficient is set up. Then the influencing factors of atmospheric average attenuation coefficient are analyzed. Finally, take the waveband of 8-12 μm for example, it＇s numerical value is simulated in theory. The analysis results indicate that radiant point＇s temperature and spectral transmission distance and weather conditions have effect on the atmospheric average attenuation coefficient.
出处
《红外技术》
CSCD
北大核心
2009年第6期323-326,共4页
Infrared Technology
关键词
大气平均衰减系数
光谱波段
光谱辐射
atmospheric average attenuation coefficient
spectral waveband
spectral radiation
