Abstract
Quantitative research of atmospheric path radiation and object reflectance radiation has been paid much attention and the research is significant content for atmospheric correction due to spacecraft remote sensing detection further studied. Because of the calculation for atmospheric path radiation depended on complex programs such as MODTRAN, the programs are very difficult to understand and it will be waste most time to call them. Thus, the model for atmospheric path radiation is set up to obtain the exact value of atmospheric path radiation fleetly and conveniently, which is helpful for actual significance on infrared target tracking, infrared target detecting and infrared target imaging. Based on the theory of atmospheric radiation transmission and atmospheric window, this paper comprehensively considers how to calculate optical depth, slant path and the influence in foggy weather, and establishes complete models and calculation method of atmospheric boundary layer atmospheric path radiation of 3~5μm. Compared the result of this MATLAB program for the models with the result of PcModWin5, relative error is within 5%. It provides theoretical foundation for design and evaluation of infrared systems.
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