摘要
对于准同时发射两个波长激光的差分激光雷达,在测量时间内,大气波动对两个波长的激光回波信号的影响可能是不相同的。已有的大气修正方法是基于两个波长激光回波信号受到相同大气波动的基础之上,不适用于这种准同时的工作方式。提出了一种新的大气后向散射系数项修正方法,即利用Klett积分法,分别算出差分吸收激光雷达中两个波长激光的大气后向散射系数,得出大气后向散射系数修正项。这种方法应用于AML-2车载激光雷达测量臭氧的数据处理中,比对实验和大量的外场测量结果表明,这种修正方法是可行的、合理的。
The effect of atmospheric fluctuation on two lidar return signals may be different for quasisimultaneous emission of two lidar wavelengths. The known atmospheric correction methods based on the same atmospheric effects of two laser signals are not suitable for quasi-simultaneous emissions of two lidar wavelengths. A new correction method of atmospheric backscattering is proposed. Two backscattering coefficients are computed respectively for differential absorption lidar by Klett technique, and the backscattering correction is calculated. This method is applied to AML-2 lidar data processing for measuring ozone, and experimental results show that this correction method is feasible and reasonable
出处
《大气与环境光学学报》
CAS
2008年第6期401-406,共6页
Journal of Atmospheric and Environmental Optics
关键词
激光雷达
后向散射系数
大气修正
lidar
backscattering coefficient
atmospheric correction
