天基光电望远镜极限星等探测能力研究  

Limited magnitude detectivity of space-based opto-electronic telescope

作　　者：彭华峰[1] 陈鲸[1] 张彬[2] 

机构地区：[1]西南电子电信技术研究所,四川成都610041 [2]四川大学电子信息学院,四川成都610064

出　　处：《光电工程》2007年第8期1-5,共5页Opto-Electronic Engineering

摘　　要：从辐射度学和光度学基本原理出发,通过对目标光度信号特征和背景以及CCD噪声光信号特征的分析,导出了天基光电望远镜对空间目标的极限星等探测能力的计算公式。根据该公式,分别研究了有光照和无光照条件下的极限星等探测能力。给出了一组典型参数,在无背景光照条件下得到极限探测星等为14.1个星等,并详细研究了极限探测星等随各参数变化的关系。在有背景光照条件下,研究了极限探测星等随太阳角的变化关系。结果证明,几乎只要有太阳光进入,极限探测星等就急剧下降,因此也证明了天基光电望远镜只能在背光条件下或在地影中工作。Based on the basic principles of radiometry and photometry, the limited detectable magnitude formula of space-based telescope was derived by analyzing the features of target photometry signals and the optical signals of CCD noises. According to the equation, the limited detectable magnitude was studied with illumination and without illumination respectively. By using a set of typical parameters, the limited detectable magnitude was 14.2 without illumination, and then the relationship between the limited detectable magnitude and the parameters was discussed in detail. In the case of illumination, the relationship between magnitude and the sun angle was studied. As a result, the sun illumination has great effect on the limited detectable magnitude. Consequently, the space-based optoelectronic telescope can only work without sun direct illumination.

关 键 词：天基光电望远镜 极限探测星等 探测能力 

分 类 号：TN929.1[电子电信—通信与信息系统]