Fig. 1. Principle of dual-wavelength Raman-Mie lidar system. (a) Structure; (b) schematic diagram of the spectroscopic system

Fig. 2. Calculation process of the actual atmospheric scattered radiance

Fig. 3. Atmospheric extinction coefficient and backscattering coefficient profiles retrieved by lidar under cloudy conditions. (a) Extinction coefficient; (b) backscattering coefficient

Fig. 4. Aerosol volume spectrum distribution at different layers. (a) 0--4 km; (b) 5--8 km

Fig. 5. Aerosol parameter profiles under cloudy condition. (a) Asymmetry factor; (b) single scattering albedo; (c) optical depth

Fig. 6. Actual atmospheric scattered radiance under cloudy condition. (a) 0 km; (b) 3 km; (c) 4 km; (d) 6 km; (e) 8 km; (f) 10 km

Fig. 7. Aerosol parameter profiles under haze weather. (a) Asymmetry factor; (b) single scattering albedo; (c) optical depth

Fig. 8. Actual atmospheric scattered radiance under haze weather. (a) 0 km; (b) 2 km; (c) 4 km; (d) 6 km; (e) 8 km; (f) 10 km

Fig. 9. Actual atmospheric scattered radiance distribution at the ground under different weather conditions. (a) 16:00 on Nov. 18, 2020; (b) 16:00 on Nov. 19, 2020; (c) 11:30 on Nov. 21, 2019; (d) 11:30 on Dec. 22, 2020

Fig. 10. Direct and diffuse solar irradiance under different weather conditions

Fig. 11. Radiant quantity calculated by different methods. (a) Trend; (b) relative error; (c) correlation analysis