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中文摘要：
紫外探测具有灵敏度高、虚警率低等特点,空间目标紫外特性分析对空间目标探测具有重要意义.针对空间目标紫外特性提出了一种精确建模方法.根据空间目标的背景辐射环境及表面材料属性,引入区域分解与网格划分的思想,利用双向反射分布函数建立了空间目标紫外特性的数学模型.通过矢量坐标变换,确定了背景辐射源、探测器与目标的相对位置关系.以资源一号卫星和风云三号卫星为例,进行了目标紫外特性的仿真分析,计算获得了目标在探测器入瞳处的紫外辐照度随时间的变化关系.仿真结果验证了建模方法的正确性.
英文摘要：
Ultraviolet detection has advantages of high sensitivity and low false alarm rate.Analysis of ultraviolet characteristics has great significance for space target detection.An accurate modeling method is proposed for the ultraviolet characteristics of space target.Based on the background environment and material properties of space target,region and grid division are generated,and the mathematical model of ultraviolet characteristics of space target is established by introducing bidirectional reflectance distribution function.The position relations of target,detector and background radiation source are determined by coordinate transformation algorithm.The calculation flow for ultraviolet characteristics of space target is derived.Finally,the observed ranges and irradiation distributions of Ziyuan-1 and Fengyun-3 satellite are calculated by the given parameters.The simulation results demonstrate the validity of the modeling method.
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