节点文献
基于STK平台空间目标光散射特性仿真
Simulate Characteristics of the Light Scattering from the Spatial Target Based on STK
【作者】 金岩；
【导师】 吴振森；
【作者基本信息】 西安电子科技大学 ， 光学， 2008， 硕士
【摘要】 本文研究了目标的激光和可见光谱散射特性,结合STK软件系统数值仿真了运动空间目标的可见光谱散射特性。以粗糙面电磁散射理论为基础,从可见光谱双向反射分布函数角度,测量分析了卫星包覆材料和太阳能板的反射率谱,计算了空间目标可见光谱散射强度,讨论了卫星表面的BRDF值与入射波长、表面材料特性的影响。测量了不同材料空间目标模型材料表面的光谱BRDF,数值计算了简单目标和组合目标的激光和可见光谱散射强度空间分布,分析了不同包覆材料对可见光谱散射强度和激光散射强度角分布。论文介绍了大型仿真软件STK系统,以场景生成技术为基础,阐述了数据可视化的实现过程。推导了空间目标的各个坐标系的转换矩阵公式以及欧拉角和四元数的转换矩阵,将空间运动目标轨道和姿态数据转换成了可以在STK软件当中应用的数据。将目标光散射软件模块嵌入到STK系统中,计算了不同观测点测算到的空间运动目标可见光谱散射强度,分析了不同包覆材料对于空间运动目标的光散射强度的影响,初步实现了基于STK平台下空间运动目标光散射特性的演示与仿真。
【Abstract】 The laser and scattering characteristics of visible band from a target is investigated, and that of objects moving in space is simulated with the STK software system. Based on the theory of electromagnetic scattering from the rough surface, from the view of the bidirectional reflection distribution function(BRDF), with the measurement and analysis of the reflection index of the coating material of satellite and the material of the solar energy plate, the scattering intensity of visible band from a spatial space target is calculated, based on which the influence of the incidence wavelength and the characteristics of the surface material on the value of BRDF of the satellite surface. With the measurement of the BRDF of visible spectra of different material on a spatial target, the angular distribution of scattering intensity of laser and visible spectrum of targets, both simple and complex, are numerical calculated, and also the influence of characteristics of the different material on the angular distribution of scattering intensity is analyzed. With STK, the software of large scene rending, the procedure of the data visualization is implemented. The formulas of the transition matrix between different coordinate systems and the transition matrix of Euler angle and quaternion numbers are deduced. The data of the orbit and attitude of the spatial target are transited for the use in Skate software, module of spatial scattering by target is embedded into STK. Based on STK the scattering intensities of the spatial moving target in visible bands are calculated at different stations. The demonstration and simulation of spatial scattering characteristics by a moving target in space based on STK is implemented roughly.