采用模拟探测技术研发了具有三维扫描功能的微脉冲米散射激光雷达产品, 用于高密度气溶胶聚集地区的 大气气溶胶光学特性及云的精确探测。详细介绍了该系统的整体结构、系统控制和数据采集处理软件。 利用该系统对西安地区气溶胶及城市边界层特性进行观测研究,实验结果表明:在激光脉冲能量为50 μJ, 重复率1 kHz,望远镜接收孔径为254 mm, 信号平均时间40 s及距离分辨率为7.5 m的条件下,系统测量气溶胶的有效距离可 达到白天3~5 km左右,夜晚15 km。系统可以为研究大气变化,特别是颗粒污染物的产生、 传输和扩散的特性提供科学的测量数据。

A micro-pulsed Mie scattering lidar system operated in analog detection mode was designed and built for routine observations of aerosol optical properties and cloud in the lower troposphere, particularly in the high intense aerosol gathered atmospheric area. The configuration of lidar and its design methods including the hardware and automatic control and data acquisition software were described in details. The experimental results in Xi’an area illustrate that the system can measure the atmospheric aerosols up to the range of near 3~5 km at daytime and 15 km at nighttime under the measurement conditions of laser energy of 50 μJ with repitition rate 1 kHz, signal averaging time of 40 s, a receiving aperture 254 mm, range resolution of 7.5 m and analog detection model. It can provide scientific measurement data for understanding the atmospheric environment change, particularly the particulate pollutant generation, transmission and diffusion characteristics.