Fig. 1. Signal intensity profiles of 355 nm, 532 nm, 1064 nm

Fig. 2. (a) Lidar product structure of infrared aerosol; (b) Lidar product appearance of infrared aerosol

Fig. 3. Distribution of pollution sources monitored by infrared lidar horizontal scanning

Fig. 4. Time variation of particulate matter concentration on February 5

Fig. 5. Time variation of CO concentration on February 5

Fig. 6. Scanning and monitoring results of infrared aerosol lidar(February 5, 19:00 to 20:00)

Fig. 7. Scanning and monitoring results of infrared aerosol lidar(February 3, 19:00 to 20:00)

Fig. 8. Time variation of particulate matter concentration on February 3

Fig. 9. Time variation of CO concentration on February 3

Fig. 10. Visibility comparison results of infrared lidar from 21:28 on March 24 to 16:53 on March 27

Fig. 11. Linear regression analysis of visibility of different equipment. (a) Lidar1 and visibility meter; (b) Lidar2 and visibility meter; (c) Lidar1 and Lidar2

Fig. 12. Comparison of boundary layer height measured by visibility lidar and sounding balloon

Fig. 13. Correlation between visibility Lidar and sounding boundary layer height