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。
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.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2011年第6期1454-1458,共5页
High Power Laser and Particle Beams
基金
水下测控技术国家级重点实验室拓展提高项目
关键词
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