空间电子技术2025，Vol.22Issue(2)：28-35,8.DOI:10.3969/j.issn.1674-7135.2025.02.003
基于低轨Ka频段卫星导航技术研究
Low earth orbit satellite navigation technology for Ka frequency band
摘要
Abstract
With the advancement of technology and the emergence of new needs,the bottleneck of real-time high-precision positioning of GNSS system at the institutional level is becoming increasingly apparent,and the current high-precision enhancement technology based on GNSS still cannot break through the limitations of the system itself,and the convergence time of 1min and the positioning accuracy of 10m have reached the upper limit.With the rise of large-scale LEO satellite constellations in recent years,the Ka-band for LEO communication has shown great potential in the field of navigation.In this paper,aiming at the technical status of Ka-band low-orbit navigation system,the potential performance advantages of Ka-band in the field of low-orbit navigation such as antenna gain,code tracking accuracy,ionospheric error are analyzed through simulation.Secondly,the influencing factors of Ka-band positioning accuracy are analyzed and calculated,and the conclusion of the three-digit positioning accuracy of Ka-band navigation signal users is 0.0475 m.Navigation enhancement based on Ka-band signals is expected to break through the bottleneck of the current GNSS system and achieve real-time high-precision positioning with convergence time of seconds and positioning accuracy of centimeters,which is the development trend of navigation system in the future and provides reference for the development of low-orbit navigation augmentation system in China in the future.关键词
低轨卫星导航增强系统/实时高精度定位/Ka频段Key words
LEO satellite navigation augmentation system/Real time high-precision positioning/Ka frequency band引用本文复制引用
佟孟霖,蒙艳松,张明欢,严涛,王方舟,田广宇,边朗,王瑛,张立新..基于低轨Ka频段卫星导航技术研究[J].空间电子技术,2025,22(2):28-35,8.基金项目
中国空间技术研究院西安分院杰出青年人才基金(编号:Y23-RCFYJQ2-04) （编号:Y23-RCFYJQ2-04）
