为了精确测量3维大气风场的实时状态以应对低空风切变在飞行器起降过程中给飞行器带来的多种问题, 通过DBS四波束风场反演原理研制出一款小型3维激光测风雷达。对大气风场展开测风试验并获取风场数据, 并与其它标准测风设备的数据对比分析。结果表明, 雷达在晴天和阴天的天气状况下均可以实现对大气风场的有效测量, 风速均方根误差0.42m/s, 风向均方根误差5.33°。该雷达精准度高、稳定性好, 对风切变预警、中低空大气风场预报及飞行器飞行通道的风场测量具有重要作用。

In order to accurately measure the 3-D real-time atmospheric wind field to cope with the problems of low-level wind shear during aircraft take-off and landing, a compact 3-D Doppler wind lidar was developed by using Doppler beam swinging (DBS) principle. The wind field data obtained by the lidar were compared with the anemometry data with the other standard equipments. It turned out that the effective measurement of atmospheric wind field was achieved by the lidar under both sunny and cloudy weather conditions. The root mean square errors of wind speed and wind direction were 0.42m/s and 5.33° respectively. The lidar, with high precision and good stability, plays an important role for wind shear warning, the forecast of low-level atmospheric wind field and wind field measurement of aircraft flight channel.