强激光与粒子束, 2011, 23 (6): 1454, 网络出版: 2011-07-04
近海面大气折射对红外探测距离的影响
Refraction effects on infrared system detection ranges in near sea surface
红外探测 大气光学 近海面 负折射 蜃影 infrared system detection atmospheric optics near sea surface subrefraction mirage
摘要
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.
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.