类柱体空间目标的星等计算模型研究  

Star Magnitude Computing Model of Space Targets like Prism

作　　者：谈斌[1,2] 姚东升[1] 向春生[3] 张己化 

机构地区：[1]石家庄军械工程学院,石家庄050003 [2]乌鲁木齐21信箱,乌鲁木齐841700 [3]中国科学院光电技术研究所,成都610209

出　　处：《光电工程》2008年第7期33-37,共5页Opto-Electronic Engineering

摘　　要：针对类似柱体的空间目标的视亮度计算模型,从空间目标的等效视星等的一般计算公式出发,利用面元模型,详细推导了类似棱柱的空间目标的光照有效反射面积,基于圆柱可由棱柱近似的思想,直接得到了类圆柱体目标的有效反射面积计算模型;为了使星等亮度模型易于求解,采用卫星工具包(STK)提供模型计算中涉及的太阳、目标和地面三者的时空关系,给出了基于STK的星等计算过程,并进行了实例计算和分析,结果表明本文的星等模型易于利用STK实现,且类圆柱体模型比经验模型具有更高的分辨率。将计算结果与其它计算方法比较,所得结果更为细致。On the basis of the traditional magnitude arithmetic of space targets, the computing models of star magnitude of space targets like prism were researched. First, a more detailed arithmetic was deduced to compute effective optical reflective area of space targets like prism by adopting a facet model. For the column could be approximated by prism, the effective optical reflective area of space targets like column was obtained directly. In order to simplify the solving of the model, Satellite Tool Kit （STK） was used to provide relationship among sun. space object and observation station in the magnitude models, and the process of computation was given. The proposed new computing model was verified with other model and some analyses, and the results show that the models are easily solved with STK and the new column model has higher resolution than the experience model.

关 键 词：星等模型 卫星工具包 有效反射面积 空间目标 

分 类 号：V557.5[航空宇航科学与技术—人机与环境工程]