车载差分吸收激光雷达对SO2的测量

Mobile Differential Absorption Lidar Monitoring SO2

摘要:

介绍了自行研制的车载差分吸收激光雷达(DIAL)的系统结构和测量原理.利用可调谐激光器输出波长为286.3 nm和286.9 nm的激光测量SO2,测量范围为500m～3 km.该雷达在北京和合肥对SO2进行了实地测量,给出实测的部分典型结果,测量结果与地面仪器定点测量的结果一致.分析了误差的几种影响因素,总的测量误差在距离分别率为300m时小于7×10-9.

Abstract:

The system structure and the lidar principle of a mobile differential absorption lidar(DIAL) system designed by ourselves were described.The operation wavelengths of a tunable laser for SO_2 measurement were 286.3 nm and 286.9 nm and the measurement range is approximately from 500 m to 3 km.The field tests in Beijing and Hefei were performed with the lidar system.Examples of measurements of sulfur dioxide in Hefei and Beijing are given and results agree with the measurement results of ground monitor instrument.The error scope is analyzed and the total measurement error is <7 10~(-9) with range resolution of 300 m.