摘要
低纬度地区、相对湿度较大的大气影响了机载红外搜索跟踪(IRST)系统的作用距离。针对此问题,根据低纬度地区近几年的大气资料,从理论上分析了影响大气透射率的主要因素,重点建立了大气透射率数学模型,修正了高度和斜程对大气透射率的影响;通过MatLab软件分别仿真分析了不同季节、不同天气、不同俯仰角以及不同路程和高度时3~5μm波段的大气透射率,与大气透射率计算软件(LOWTRAN7)的仿真结果相比,其误差约为5%,验证了模型的实效性,从而为指导实际作战使用IRST系统提供了理论依据。
The action range of airborne infrared search and track （IRST） system is affected by the large humidity of atmosphere in low latitude areas. Aiming at this problem, the main factors affecting the atmospheric transmittance are analyzed based on the atmospheric data in low latitude areas in recent years. The mathematical model of atmospheric transmittance is established. The impact of height and oblique distance are also revised. Atmosphere transmittance at the wave band from 3 μm to 5 μm is analyzed by using Matlab under different seasons, weather conditions, pitching angles, heights and distances. Comparing with the simulation results of LOWTRAN7, the error is about 5%, which verifies the effectiveness of the model. The conclusion has significant reference value on guiding the practical operation of IRST system.
出处
《激光与光电子学进展》
CSCD
北大核心
2017年第1期51-58,共8页
Laser & Optoelectronics Progress
关键词
大气光学
大气透射率
低纬度地区
斜程衰减
距离
高度
atmospheric optics
atmosphere transmittance
low latitude areas
oblique path attenuation
distance
altitude
