摘要
为了提高天基空间目标光学散射特性的计算精度,提出了一种天基空间目标光学散射特性的精确建模与验证方法。综合考虑目标的背景辐射环境、表面材料属性、几何结构尺寸、运行轨道要素等因素,通过有限元分析和矢量坐标变换,利用双向反射分布函数建立了目标光学散射特性的数学模型。基于目标光学散射特性测量平台,进行了低温真空环境下目标光学散射特性数学模型的实验验证。结果表明,目标散射辐照度的理论建模结果与实验测量结果基本一致,均方误差优于9.57%。实验结果验证了建模方法的正确性。
An accurate modeling and verification method is proposed to improve the calculation precision of space-based optical scattering characteristics of space objects. Further, a mathematical model is established for space-based optical scattering characteristics using the bidirectional reflectance distribution function via finite element analysis and vector coordinate transformation based on the object background radiation, surface material properties, geometric dimension, and orbit elements. Subsequently, this model is experimentally verified in a low-temperature and vacuum environment using the measurement platform of the optical scattering characteristics;the modeling data agrees well with the measured data, and the mean square errors are lower than 9.57%, demonstrating the validity of the proposed method.
作者
孙成明
袁艳
吕群波
Sun Chengming;Yuan Yan;Lu Qunbo(Academy of Opto-Electronics,Chinese Academy of Sciences,Beijing 100094,China;Key Laboratory of Computational Optical Imaging Technology,Chinese Academy of Sciences,Beijing 100094,China;Key Laboratory of Precision Opto-Mechatronics Technology,Ministry of Education,Beihang University,Beijing 100191,China)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2019年第11期346-352,共7页
Acta Optica Sinica
基金
国家自然科学基金(61635002)
教育部长江学者和创新团队发展计划(IRT0705)
关键词
散射
空间目标
散射特性
双向反射分布函数
scattering
space object
scattering characteristics
bidirectional reflectance distribution function
