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对两点标定法求解气溶胶消光后向散射比Sa(z)的可行性进行了研究。讨论了利用两点标定法反演气溶胶消光后向散射比的精度和两标定点之间距离的关系:当两点之间的距离大于1km时,利用两点标定法得到的气溶胶消光后向散射比是可靠的。对比分析了两标定点间的距离大小及两种不同的迭代方法对两标定点之间气溶胶消光后向散射比反演结果的影响。并对两点标定法用于气溶胶消光后向散射比反演时,预先对反演结果进行误差估计的可行性进行了探讨。实际反演结果表明,利用两点标定法进行气溶胶消光后向散射比的反演,当两标定点之间的距离大于1km且标定点的气溶胶消光系数的误差为5%时,反演得到两标定点之间气溶胶消光后向散射比的误差一般不会超过6%。
The feasibility of solving the aerosol extinction backscattering ratio Sa (z) by two point calibration method was studied. The relationship between the precision of backscattering ratio and the distance between two calibration points using aerosol backscattering by two-point calibration is discussed. When the distance between two points is more than 1km, the aerosol obtained by the two-point calibration is extinct Scattering ratio is reliable. The distance between two calibration points and the influence of two different iterative methods on the inversion of aerosol backscattering ratio between the two calibration points were analyzed. When the two-point calibration method is used to backscatter backscatter of aerosol extinction, the feasibility of estimating the error of the inversion result in advance is discussed. The actual inversion results show that inversion of aerosol backscattering ratio using two-point calibration method can be inversed when the distance between two calibration points is more than 1km and the error of aerosol extinction coefficient at calibration point is 5% The error between the backscattering ratio of aerosol extinction between the two calibration points is generally not more than 6%.