摘要
采用基于点扩散函数的模型分析和基于测试方法的MODTRAN计算两种方法,计算了大气调制传递函数。通过引入大气分层对调制传递函数的影响,给出一种大气折射率结构常数的综合计算方法,修正了大气调制传递函数模型,明确给出了模型中的参数及计算方法。利用MODTRAN软件计算大气调制传递函数的模型并给出了计算方法。以机载成像仪的工作环境为背景对模型进行了仿真分析,讨论了影响调制传递函数的因素,为评价大气对成像仪的影响提供了依据。
Two methods of calculating atmospheric modulation transfer function（MTF） are introduced,which are model analysis based on point spread function and MODTRAN software calculation based on measured parameters.The model of atmospheric MTF was modified by introducing the influence of atmospheric stratification and a calculation about the structure constant of atmosphere refractive index fluctuations.All the parameters and calculation methods required in the model are presented.The methods for calculating these parameters are provided.A method of calculating MTF by MODTRAN is introduced.The parameters that influence the MTF are analyzed by simulation based on the working environment of airborne imager.Therefore,the influence of atmospheric environment on it can be evaluated.
出处
《现代电子技术》
2012年第1期124-128,共5页
Modern Electronics Technique
基金
国家973计划资助项目(2009CB724005)
长江学者和创新团队发展计划资助(IRT0705)
