摘要
天文定位技术抗干扰性强,隐蔽性好,误差不随时间积累,在陆基、海基、空天基平台上应用广泛。近些年,低轨巨星座技术迅猛发展,为导航技术的发展提供了契机。本文提出了一种基于低轨卫星光学观测的定位算法,以星间角距作为基本观测量,详细推导了定位模型,分析了影响定位精度的主要误差源,给出了误差传播公式。基于星链星座的仿真试验表明,本文算法平均定位精度可达30.5 m,其中北向、东向、天向平均定位精度分别为4.3、6.3、29.5 m。本文算法不仅保留了传统天文定位技术的优点,而且无须水平基准,为小型化、快速化和自动化天文导航装备的研制提供了一种思路,具有潜在的应用价值。
Celestial positioning is widely used in land-based,sea-based,air-based and space-based platforms for its advantages of strong anti-interference,good concealment and non-accumulated error with time.In recent years,the rapid development of low-orbit giant constellation technology has provided an opportunity for the development of navigation technology.In this paper,we propose a positioning algorithm based on optical observation of low-Earth orbiter(LEO).First of all,the angles between the LEO and stars are considered as the basic observation,and the positioning model is derived in details.Then,the main error sources impacting on the positioning accuracy is analyzed,and the error propagation formulas are given.At last,the simulation experiments based on the Starlink constellation are conducted,the results of which show that the average positioning accuracy of this algorithm can totally reaches 30.5 m,with 4.3 m in north direction,6.3 m in east direction and 29.5 m in vertical direction.The algorithm not only owns the advantages of traditional celestial positioning,but also gets rid of horizontal datum,providing a new way to develop the miniaturized,fast and automated celestial navigation equipment without the need of horizontal reference.
作者
朱容蔚
詹银虎
李广云
ZHU Rongwei;ZHAN Yinhu;LI Guangyun(Troops 61243,Urumqi 830000,China;Institute of Surveying and Mapping,Information Engineering University,Zhengzhou 450001,China)
出处
《测绘学报》
EI
CSCD
北大核心
2024年第7期1278-1287,共10页
Acta Geodaetica et Cartographica Sinica
基金
国家自然科学基金(42074013)
河南省优秀青年科学基金(242300421151)。
关键词
天文定位
低轨卫星
星间角距
精度分析
astronomical positioning
low-orbiting satellites
inter-satellite angular separation
precision analysis
