探测距离作为电视侦察系统的重要指标, 受气象条件影响严重, 为了降低机载电视侦察性能实验对天气的依赖性, 从侦察系统发现目标的必要条件出发, 研究了目标大小、照度、环境因素以及气象条件等因素对探测距离的影响, 得出了不同气象条件下电视侦察系统探测距离的推算公式。利用MATLAB 7.5软件编程, 反复调用大气传输软件LOWTRAN 7程序, 以某气象条件下获得的实验数据为基础, 推算得到其他气象条件下电视侦察系统的探测距离, 并通过飞行实验对推算结果进行验证, 最后通过仿真从大气能见度、温度、湿度等方面对探测距离的影响进行了分析研究。实验和仿真结果表明, 该推算方法合理可行, 推算结果准确可靠, 可有效降低电视侦察实验对天气的依赖性, 对电视侦察系统性能评估有一定的借鉴意义。

Visual detection range is an important factor which is influenced by atmospheric condition. In order to reduce the passive effect, after analyzing the factors affecting visual detection range, such as object size, illumination intensity, background and atmospheric condition, the equivalent algorithm formula is established to calculte the visual detection range in different atmospheric condition. Based on the experimental data obtained under certain meteorological conditions, the detection range under other atmospheric condition is calculated by using the Matlab 7.5 and LOWTRAN 7. The result is validated through field test. The effection of different atmospheric factors to detection range is analyzed by simulation. The result shows that the validity and feasibility of this method are helpful for the capability evaluation of visual detection systems.