瑞利测风激光雷达系统性能改进与中高层大气风场观测  

Performance Improvement of Rayleigh Wind Lidar and Wind Field Observation in Middle and Upper Atmosphere

作　　者：唐磊[1] 蒋杉[1] 李梓霂 郑俊[2] 赵若灿 孙东松[2] 吴海滨[3] 代轩 鲁平[1] 

机构地区：[1]合肥师范学院电子信息工程学院,安徽合肥230601 [2]中国科学技术大学地球与空间科学学院,安徽合肥230026 [3]安徽大学物理与材料科学学院,安徽合肥230601

出　　处：《中国激光》2016年第7期263-272,共10页Chinese Journal of Lasers

基　　金：国家自然科学基金(41574180);安徽省科技攻关项目(1604a0902152);安徽省高校自然科学研究重点项目(KJ2016A581)

摘　　要：开展了瑞利测风激光雷达系统性能改进和效率提升研究,改进接收系统光信号的耦合效率、传输效率和采集效率,使改进后的接收机光学效率比原接收机提高1.874倍,解决了系统在紫外波段光学效率低的问题。优化了校准参数,并将标准具表面反射率提高至80%,使激光频率锁定精度满足系统探测精度的需要。增加60m准静态零风速实时校准管道,消除多普勒零点偏移产生的测量误差,提高了系统探测精度。利用改进的瑞利测风激光雷达进行大气风场探测实验,与探空气球相比风速和风向最大相差6.73m/s和24.6°,平均相差1.28m/s和2.65°,获取了多区域高时空分辨率的风场数据,为研究中高层大气变化规律、认识空间环境的区域变化特征提供了必要的数据支持。Abstract The research on performance improvement and efficiency promotion for the Rayleigh Doppler wind lidar is carried out. The optical efficiency of the improved receiver is 1. 874 times higher than that of the original receiver by improving coupling efficiency, transmission efficiency and collection efficiency of optical signal in the receiver system, and the problem of low optical efficiency in the ultraviolet band in the current system is solved. The locking accuracy of laser frequency can meet the need of system detection accuracy by means of optimizing calibration parameters and increasing the surface refleetivity of etlon to 80%. Measurement deviation of line of sight wind velocity, which is owing to the Doppler zero offset, is eliminated by using a 60 m quasi static zero wind velocity real- time calibration pipeline, which improves the measurement accuracy. The comparison between the results obtained by Iidar and radiosonde shows good agreement. The maximum deviation of wind velocity and direction is 6.73 m/s and 24.6%, respectively, and the average deviation of wind velocity and direction is 1. 28 m/s and 2. 65%, respectively. The wind field data with high spatial-temporal resolution is obtained in many areas, providingnecessary data support for studying the change discipline of the middle and upper atmosphere and understanding the regional change characteristic of space environment.

关 键 词：遥感 测风 瑞利散射 激光雷达 风场观测 

分 类 号：TN958.98[电子电信—信号与信息处理]