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.
出处
《光学与光电技术》
2013年第2期52-55,共4页
Optics & Optoelectronic Technology
关键词
天文导航
星等
信噪比
调制度
短波红外
celestial navigation
star magnitude
SNR
modulation depth
SWIR
