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概述了瑞利多普勒测风激光雷达的基本工作原理,讨论和分析了基于F-P标准具双边缘鉴频技术的测量精度,在窄带实验光源和宽带发射光源入射下,分别测量了鉴频器的透过率曲线,并比较了两种光源入射下由于频率响应函数引起的系统误差。结果表明:瑞利测风激光雷达的频率响应函数满足设计要求,在-100~100 m/s的径向风速动态范围内,系统误差随径向风速的增大而增大,宽带光源测量时,由频率响应函数引起的系统误差在0.74~1.38 m/s之间;窄带光源测量时,由频率响应函数引起的系统误差在0.75~0.84m/s之间。窄带光源较宽带光源测量时,系统误差降低了0~0.48m/s。
The basic working principle of Rayleigh Doppler airborne lidar is summarized. The accuracy of double-edge frequency discrimination technique based on FP standard is discussed and analyzed. Under the condition of narrow-band experimental light source and broadband incident light source, Transmittance curves, and compared the system error caused by the frequency response function under the incident of two light sources. The results show that the frequency response function of Rayleigh wind lidar meets the design requirements. The system error increases with the increase of radial wind speed in the dynamic range of radial wind speed of -100 ~ 100 m / s. , The systematic error caused by the frequency response function is between 0.74 and 1.38 m / s; when the narrowband light source is measured, the system error caused by the frequency response function is between 0.75 and 0.84 m / s. Narrow-band light source than the broadband light source measurement, the system error is reduced by 0 ~ 0.48m / s.