曙暮光影响的大气偏振模式建模方法研究  

Skylight Polarization Patterns Modelling Method Under Influence of Twilight

作　　者：韦坤 范之国[1] 金海红[1,2] 桂策定 董万卷 Wei Kun;Fan Zhiguo;Jin Haihong;Gui Ceding;Dong Wanjuan(School of Computer Science and Information Engineering,Hefei University of Technology,Hefei 230601,Anhui,China;School of Electronic and Information Engineering,Anhui Jianzhu University,Hefei 230601,Anhui,China)

机构地区：[1]合肥工业大学计算机与信息学院,安徽合肥230601 [2]安徽建筑大学电子与信息工程学院,安徽合肥230601

出　　处：《激光与光电子学进展》2024年第5期88-97,共10页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(61571177)。

摘　　要：针对现有大气偏振模式理论模型单独考虑太阳或月亮的影响,无法充分描述晴朗天气下黎明和黄昏过渡期间天空偏振模式的问题,提出了一种曙暮光影响的大气偏振模式建模方法。该方法引入太阳和月亮的影响,以太阳和月亮位置求解的Stokes矢量为基础,同时考虑了实际天空中大气粒子多次散射的因素,对Stokes矢量优化;分析太阳和月亮对大气偏振模式的影响,确定了太阳和月亮的影响权重;利用偏振角表征大气偏振模式。结果表明,所提模型的仿真结果与实测偏振角具有相同的分布和变化特性,且保持着较高的相似度,能够有效地表征曙暮光影响的大气偏振模式。Existing theoretical models of skylight polarization patterns have problems that only consider the influence of the sun or the moon alone and could not adequately describe the polarization patterns of the sky during the transition between dawn and dusk in clear weather.Therefore,a modelling method of skylight polarization patterns under the influence of twilight is proposed.The method introduces the influence of the sun and the moon and calculates the Stokes vectors using the position of the sun and the moon.Considering the factors of multiple scattering of atmospheric particles in the actual sky,the influence weights of the sun and the moon are determined by Stokes vector optimization.In addition,the obtained angle of polarization is used to characterize the skylight polarization patterns.The experimental results show that the simulation results of the proposed model and the measured angle of polarization have the same distribution and variation characteristics,and maintain a high degree of similarity,which can effectively characterize the skylight polarization patterns influenced by twilight.

关 键 词：大气偏振模式 曙暮光 Stokes矢量 偏振角 偏振光导航 

分 类 号：P427.1[天文地球—大气科学及气象学]