在反演大气消光系数过程中,一个值得探讨的问题就是消光系数边界值的选择问题。提出了一种基于横向Steffensen型3阶方法求解大气气溶胶消光系数边界值的新算法,并将该方法应用于仿真信号和实际观测到的回波信号中求解大气消光系数,证明了所提算法的真实可靠性。结果表明,所提算法迭代速度快,经过较少的迭代次数就可收敛到消光系数的边界值,能够较准确地反演大气消光系数。

During the inversion of atmospheric extinction coefficient, choosing the boundary value of the extinction coefficient is critical. In this study, a new method based on lateral Steffensen-like third-order method is proposed for determining the boundary value of atmospheric aerosol extinction coefficient. To confirm the method reliability, the proposed method is applied to both simulated and actual measured echo signals. Results show that the proposed method has high iterative speed and converges to the boundary value of extinction coefficient after a few iterations, which can invert atmospheric extinction coefficient more accurately.