摘要
介绍了基于现代小卫星技术的天基无源定位系统几个主要技术层次--单星定位、双星定位、编队飞行、卫星星座;论述了各个技术层次的基本概念、特点和关键技术.详细分析了适合我国国情的双星无源定位方案,该方案依靠2颗同轨小卫星,采用到达时间延迟/到达频率延迟(TDOA/FDOA)定位方式,实现对辐射源的实时、精确定位,数值计算结果进一步揭示了定位精度与TDOA/FDOA测量精度的关系;具体研究了卫星编队飞行的天基干涉仪应用方式的可实现性,认为应当通过对TDOA或FDOA的测量实现基于卫星编队飞行的无源定位.
Four applications of the space-based passive position system based on the modern small satellite technology are discussed, which includes positioning with single satellite, the one with twin satellites, the one with formation flying and the one with satellites constellation. In particular, the basic concepts, characteristics and critical technologies for these applications are described in detail. Accordingly, a simple passive positioning scheme with two small satellites in the same orbit is proposed, which measures both time-delay of arrive (TDOA) and frequency-delay of arrive (FDOA) to estimate the position of an emitter. The relationship between the accuracy of positioning and the quality of TDOA/FDOA estimation is analyzed with the aid of numerical results. In addition, the implementation of the passive positioning system with formation flying is discussed, showing that the scheme based on TDOA or FDOA estimator is better than that based on phase interferometer.
出处
《装备指挥技术学院学报》
2003年第3期24-29,共6页
Journal of the Academy of Equipment Command & Technology
