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设计了基于Fabry-Perot(FP)标准具的中高层大气(20~60 km)多普勒测风激光雷达(DWL)系统。介绍了激光雷达的多普勒测风基本原理;根据探测指标分别给出了DWL的发射机、接收机、发射接收光学和风场反演等子系统方案,重点对接收机的参数进行了详细的设计与分析;最后对全系统的信号信噪比、探测偏差进行了理论模拟。得出的结论为:当脉冲累计时间为5 min(15 000 shots)时,该系统在晚上60 km高度处的探测偏差为3.6 m/s。
A Doppler wind lidar (DWL) system based on Fabry-Perot (FP) etalon was designed for the mid-upper atmosphere (20-60 km). The basic principles of Doppler wind measurement of LIDAR are introduced. According to the detection indexes, the subsystems of DWL transmitter, receiver, transmitting and receiving optics and wind field inversion are given respectively. The parameters of receiver are detailed Design and analysis. Finally, the system-wide signal-to-noise ratio and detection bias are theoretically simulated. The conclusion is drawn as follows: when the pulse accumulation time is 5 min (15 000 shots), the detection deviation of this system at night 60 km is 3.6 m / s.