近海面大气折射对红外探测距离的影响

基于几何光学和抛物线近似方法建立光线传播轨迹数学模型，计算最大探测距离(MIVR)，并分析蜃影出现的成因。通过数值分析及海上试验的对比验证，结果表明：在相同的风速条件下，MIVR会随海气温差的增大而减小；当海气温差不变时，随着风速的增大，MIVR逐渐减小；海气温差越大，MIVR的递减量越趋于平缓；MIVR与高度位置的对应关系几乎是一条标准的直线，且MIVR随着高度参数的减小而递减；通过与试验数据的对比，模型评估MIVR的准确率较高。

Abstract

This paper established optical propagation tracing mathematical model based on geometrical optics and parabolic approximation method, extracting maximum inter-vision ranges(MIVR) to denote the absolute detection range limit imposed by refraction for a given sensor and target height, determining the appearance mechanism of mirage. When wind speed is constant, MIVR decreases with the increase of air-sea difference in temperature(ASTD); but MIVR decreases with the increase of wind speed under the constant ASTD; the MIVR decreases with ASTD increasing, the corresponding relationships of MIVR and the height position is a standard straight line, and MIVR reduces with the height parameter decreasing; the accuracy of MIVR is better.

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李云波, 张永刚, 李桂娟, 王慧丽. 近海面大气折射对红外探测距离的影响[J]. 强激光与粒子束, 2011, 23(6): 1454. Li Yunbo, Zhang Yonggang, Li Guijuan, Wang Huili. Refraction effects on infrared system detection ranges in near sea surface[J]. High Power Laser and Particle Beams, 2011, 23(6): 1454.

近海面大气折射对红外探测距离的影响

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