摘要
利用天空背景测量设备测量了西北地区的天空背景亮度,给出了该地区典型时刻的全天空背景亮度等值线分布,并进行了对应的背景光谱亮度比重分析;基于MODTRAN软件进行了对应时刻的天空背景亮度模拟计算,进行了比对分析。分析结果表明:西北地区的背景光谱分布相对于理论分布来说变化较缓,白天对空间目标观测采用窄带滤波能有效提高光电系统的探测能力;MODTRAN软件模拟计算的天空背景亮度在偏离太阳方向与该地区实测数据基本吻合,随着天顶角的减小误差也在减小,但在靠近太阳位置存在一定差距。
The sky background brightness is measured with sky background measurement equipment in northwest region. The contour line of all-sky background brightness is given, and the spectrum distributing of the background brightness is analyzed. Then the corresponding brightness is simulated with the MODTRAN software under same weather situations, and the simulated result is analyzed. The result indicates that the background spectrum distribution changes slow relative to the theory, the detection ability can be improved through the narrowband filtering, and the simulated brightness basically agrees with the northwest region measurement data away the sun, and the error decreases with the decrease of zenith angle, but it is different when near the sun.
出处
《大气与环境光学学报》
CAS
2010年第6期421-426,共6页
Journal of Atmospheric and Environmental Optics
基金
国家863计划项目(2008AA8060018)资助
关键词
天空背景
测量
光电
光谱
sky background
measurement
electro-optical
spectrum
