天文导航光电测星能力的计算方法  

Calculation Method of Star Sensing Capability Provided by Optronic Sensor for Celestial Navigation Devices

作　　者：陆光宇[1] 李忠[2] 

机构地区：[1]海军装备部电子部,北京100841 [2]华中光电技术研究所-武汉国家光电实验室,湖北武汉430223

出　　处：《光学与光电技术》2013年第2期52-55,共4页Optics & Optoelectronic Technology

摘　　要：天文导航可全面地提供位置、航向、姿态和速度等核心导航信息,特别是在复杂电磁环境下,发挥着独特的重要作用。测星能力是天文导航设备的核心指标之一,提出了光电通道测星的信噪比和调制度的计算公式和参数选取说明,给出了短波红外测星设备的计算实例和实测结果,结果表明短波红外测星可显著延长测星时段。Celestial navigation devices play an important role in navigation applications thanks to their ability to provide criti- cal navigation information such as position, course, attitude and speed, particularly in complex electromagnetic environment. Star sensing capability is one of key performance indications for celetial navigation devices. In this paper, formulae are derived for calculation of optronic channel star sensing SNR, and parameter selection method is proposed. It is shown by calculation and practical measurement on a SWlR star sensing device that the time interval for star sensing can be significantly prolonged by using SWIR star sensing technique.

关 键 词：天文导航 星等 信噪比 调制度 短波红外 

分 类 号：V448[航空宇航科学与技术—飞行器设计]