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1. 国防科技大学电子科学学院,湖南 长沙 410073
2. 卫星导航技术重点实验室,湖南 长沙 410073
[ "吴政城(1999- ),男,国防科技大学硕士生,主要研究方向为卫星导航" ]
[ "倪少杰(1978- ),男,博士,国防科技大学研究员,主要研究方向为导航与时空技术、卫星载荷与导航终端设计" ]
[ "刘文祥(1981- ),男,博士,国防科技大学副研究员,主要研究方向为星基导航与定位技术" ]
[ "肖伟(1992- ),男,博士,国防科技大学讲师,主要研究方向为卫星导航" ]
[ "李宗楠(1990- ),女,博士,国防科技大学讲师,主要研究方向为北斗/GNSS、低轨卫星的实时高精度定轨定位技术研究及应用、多源信息融合高精度定位方向" ]
网络出版日期:2023-12,
纸质出版日期:2023-12-20
移动端阅览
吴政城, 倪少杰, 刘文祥, 等. 基于遗传算法选星的高中低轨导航混合星座完好性监测技术[J]. 天地一体化信息网络, 2023,4(4):61-70.
Zhengcheng WU, Shaojie NI, Wenxiang LIU, et al. Integrity Monitoring Technology of Mixed Constellation of High, Medium and Low Orbit Navigation Based on Genetic Algorithm Star Selection[J]. Space-integrated-ground information networks, 2023, 4(4): 61-70.
吴政城, 倪少杰, 刘文祥, 等. 基于遗传算法选星的高中低轨导航混合星座完好性监测技术[J]. 天地一体化信息网络, 2023,4(4):61-70. DOI: 10.11959/j.issn.2096-8930.2023043.
Zhengcheng WU, Shaojie NI, Wenxiang LIU, et al. Integrity Monitoring Technology of Mixed Constellation of High, Medium and Low Orbit Navigation Based on Genetic Algorithm Star Selection[J]. Space-integrated-ground information networks, 2023, 4(4): 61-70. DOI: 10.11959/j.issn.2096-8930.2023043.
低轨卫星在通信、导航、遥感等领域应用广泛,对满足通信需求、提升导航定位精度具有重要意义。完好性监测技术是卫星导航系统安全与可靠运行的重要保障,随着低轨技术的成熟发展与海量低轨卫星的逐步应用,亟待开展高中低轨混合星座条件下系统及用户的完好性监测技术研究。提出一种基于遗传算法选星的高中低轨导航混合星座完好性监测技术,在传统最佳几何精度因子选星法的基础上,通过引入遗传算法,构造基于卫星几何观测矩阵特征斜率线性加权的适应度因子,以实现用户保护水平向保护限值的快速收敛。相较于传统算法,此算法通过优化选星的方式,进一步提升了接收机的完好性。在CAT I精密条件下,对于“北斗+StarNet-1”星座,此算法全球范围可用性水平平均增强了 5.60%,对于东半球中纬地区和东半球低纬地区增强效果最佳,全球范围可用性水平分别增强了7.01%和6.42%。
Low-orbit satellites are widely used in communication
navigation
remote sensing and other fields
which is of great significance to meet the needs of communication and improve the accuracy of navigation and positioning.Integrity technology is an important guarantee for the safe and reliable operation of satellite navigation system.With the mature development of low orbit technology and the gradual application of a large number of low orbit satellites
it is urgent to develop the system integrity monitoring technology under the condition of mixed constellation of high and low orbits.This paper proposed a hybrid constellation integrity monitoring technology for high
middle and low orbit navigation based on genetic algorithm for star selection.On the basis of the traditional optimal geometric accuracy factor selection method
genetic algorithm was introduced to construct a fitness factor based on the linear weighted feature slope of the satellite geometric observation matrix
so as to achieve rapid convergence of user protection level to protection limit.This method further improved the integrity of the receiver by optimizing the way of star selection.Under the accuracy requirement of CAT I
for the "BeiDou+StarNet-1" constellation
the global availability level of the proposed algorithm was 5.60%
and the enhancement effect was the best for the mid-latitude and low-latitude of the Eastern Hemisphere
which were increased by 7.01% and 6.42%
respectively.
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