基于双边缘技术的低空测风激光雷达分析  

Analysis of the double-edge technique for lidar wind measurement in low altitude

作　　者：蒋立辉[1] 庄子波[1] 李勇[1] 

机构地区：[1]中国民航大学通信工程系智能信号与图像处理天津市重点实验室,天津300300

出　　处：《红外与激光工程》2006年第z3期247-251,共5页Infrared and Laser Engineering

摘　　要：利用双边缘技术采用直接探测激光雷达探测低空(1km 以下)气溶胶的后向散射回波,改进了针对低空气溶胶散射信号的双边缘技术理论,并通过模拟灵敏度的变化曲线选取了系统对气溶胶信号响应性能最好时的 Fabry-Perot 标准具及激光参数。模拟估算了系统的灵敏度和测量误差,结论表明:系统的相对灵敏度在小频移时可达到7%,系统误差可小于1 m/s。Using the double-edge technique,direct-detection lidar with aerosol-based backscatter in low altitude (below 1 km) is utilized.The double-edge technique theory on aerosol backscatter signal in low altitude is improved, and the best Fabry-Perot etalon and laser parameters are obtained though the simulated sensitivity movement curves. The system's sensitivity and measurement error are simulated,and it is shown that for small Doppler shifts a measurement sensitivity of 7% can be obtained,and the measurement error is less than 1 m/s.

关 键 词：多普勒 激光雷达 双边缘技术 FABRY-PEROT标准具 测风 气溶胶 

分 类 号：TN958.98[电子电信—信号与信息处理]