Fig. 1. Spectral discrimination principle of HSRL

Fig. 2. System structure of HSRL

Fig. 3. Transmittance of molecular scattering signal varying with different temperatures

Fig. 4. Error in molecular transmittance due to temperature and frequency fluctuations

Fig. 5. Molecular transmittance calibration flowchart

Fig. 6. Profile calibration results. (a) Backscattered signals; (b) calibrtion results of molecular transmittance

Fig. 7. Transmittance calibration results under different weather conditions. (a) Sunny; (b) dust; (c) cloudy

Fig. 8. Comparison of results between HSRL and solar photometer. (a) Fixed system parameters; (b) calibrated system parameters by our method