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碘分子1107～1108吸收线之间有一个光谱透射率峰。基于该光谱透射率峰的碘分子滤波器对大气分子的瑞利散射有强烈的抑制作用,而对大气气溶胶的Mie散射影响较小。利用这种碘分子滤波器构成的高光谱分辨率激光雷达可以分离大气分子散射和气溶胶散射,从而能够测量大气后向散射比和大气风场。对测量原理和测量精度进行了详细推导,并利用合理的激光雷达和大气参数进行了计算机模拟。模拟结果表明,对于大气后向散射比的测量,夜晚大气高度25km、白天8km以下可以达到5%的精度;大气视线风速测量范围为±40m/s,测量精度在夜晚大气高度5km、白天4km以下时优于5%。
Iodine molecule 1107 ~ 1108 absorption line between a spectral transmittance peak. The iodine molecular filter based on this spectral transmittance peak strongly suppresses the Rayleigh scattering of atmospheric molecules and has little effect on the Mie scattering of atmospheric aerosols. Hyperspectral resolution Lidar constructed with this iodine molecular filter separates atmospheric molecular scattering and aerosol scattering, enabling the measurement of atmospheric backscattering and atmospheric wind fields. The measurement principle and measurement precision are deduced in detail, and the computer simulation is carried out by using reasonable laser radar and atmospheric parameters. The simulation results show that for atmospheric backscattering measurements, the nighttime atmospheric altitude is 25km and the accuracy below 5km can reach 5% during the daytime. Atmospheric sight wind speed measurement range is ± 40m / s, measurement accuracy is 5km at night and 4km daylight Better than 5%.