【摘要】 大气偏振模式中包含了丰富的空间方位、地表特性以及大气层结构参数等信息,在偏振光导航、遥感探测等领域都具有重要的研究价值,但经典的理想大气偏振模式仿真模型同实际分布模式之间存在明显差异,不能准确表征混浊大气偏振模式的全局分布特性。因此,提出了一种混浊大气偏振模式的建模方法,该方法以三维天球大气模型为基础,用Monte Carlo方法模拟太阳光在大气中的传输过程,实现了对混浊大气偏振模式全局分布的建模。实验表明,建模仿真结果同混浊大气偏振模式的分布规律一致,偏振度分布模式同实际分布高度吻合,偏振角分布模式同实际分布模式具有相同的分布和变化特性,利用该模型可对混浊大气的偏振模式分布与变化特性进行分析和预测。更多还原

【Abstract】 Atmospheric polarization pattern contains a plenty of informations,such as informations of the spatial orientation,characteristics of earth′s surface,structure parameters of the atmosphere,et al,which has important research value in polarotactic navigation,remote sensing,and other fields.However,the real celestial polarization pattern in the turbid atmosphere is quitely different from simulation results of existing classical models,which cannot represent the atmospheric polarization pattern in turbid atmosphere.A turbid simulation model of atmospheric polarization pattern is proposed.This new model can be set up by using the three dimension(3D)celestial sphere model to describe the real atmosphere,using the Monte Carlo program of polarized light transport to simulate radiation transfer of the sunlight in the atmosphere.The experiments show that this model is consistent with the real polarization pattern in turbid atmosphere.Specifically the degree of polarization distribution highly accords with the real degree of polarization distribution.And the angle of polarization distribution can reflect the distribution and change feature of the real angle of polarization accurately.In conclusion,this model can be used to analyze and predict the distribution and change feature of the real atmospheric polarization pattern in turbid atmosphere.更多还原