针对环境监测工作的迫切需要,开发研制了我国第一台车载式大气污染监测激光雷达。它具有测量范围大,距离分辨率高、数据可靠、灵敏度高等特点,并通过驱动单元能进行空间三维探测。该雷达系统能监测四种大气污染物,即大气气溶胶、二氧化硫、二氧化氮和臭氧。大气二氧化硫、二氧化氮、臭氧的最高探测灵敏度分别为0.01 mg/m3、0.04 mg/m3、0.01 mg/m3,气溶胶的消光系数探测限为10-4 km-1,最高探测空间分辨力为7.5 m,最大探测距离为3～10 km。介绍了其基本原理,关键技术和运行情况。

A mobile differential absorption lidar (DIAL) system for atmospheric pollution measurements has been developed. It is the first mobile system for air pollution monitoring in China. This lidar system allows three-dimensional measurements by using a steering unit, and can measure four kinds of pollutants in atmosphereaerosol, SO2, NO2, and O3. The lower detection limit of the SO2, NO2, O3, and aerosol's extinction coefficient is 0.01 mg/m3,0.04 mg/m3, 0.01 mg/m3, and 10-4 km-1 respectively. The best spatial resolution and maximum measurement range are 7.5 m and about 3～10 km respectively. Using this system, range-resolved measurements with high sensitivity over large areas can be made. The lidar system in some detail and its performance are described.