航天器工程2024，Vol.33Issue(1)：1-10,10.DOI:10.3969/j.issn.1673-8748.2024.01.001
PULSAR低轨卫星导航星座性能分析研究
Study on Performance of PULSAR Low Earth Orbit Constellation Satellite for Navigation
张弓 1马福建 1聂欣 1陈秋丽 1李平 1张旭 1王腾2
作者信息
- 1. 中国空间技术研究院通信与导航卫星总体部,北京 100094
- 2. 中国星网网络系统研究院有限公司,北京 100029
- 折叠
摘要
Abstract
Low earth orbit(LEO)navigation satellite system is currently the focus of attention in the field of satellite navigation.In this paper,the LEO navigation constellation named PULSAR proposed by Xona Space Systems,i.e.,a company in the United States,is selected for analysis.Firstly,its development plan and latest progress are introduced.Then,the characteristics and positioning performance of PULSAR constellation at different construction stages are comprehen-sively analyzed from the aspects of ground coverage,space-based global navigation satellite sys-tem(GNSS)monitoring capability,inter satellite link construction and the number of occultation events.The results show that in the stage of full service capability,the PULSAR constellation can provide global coverage capability of more than 8 folds(95%),with a position dilution of precision(PDOP)of better than 3.5(95%),and has the meter level independent positioning ca-pability.Combined with GNSS,the convergence time of precise point positioning(PPP)can be significantly reduced by about 90%.In the meanwhile,with the support of onboard navigation receiver,it can meet the needs of the enhancement of GNSS spatial-temporal accuracy and the monitoring of space weather and integrity.The relevant conclusions obtained can provide valuable reference for the construction of LEO navigation satellite system in China.关键词
修娜空间系统/低轨星座/卫星导航/星座特性Key words
Xona Space Systems/LEO constellation/satellite navigation/constellation characte-ristics分类
天文与地球科学引用本文复制引用
张弓,马福建,聂欣,陈秋丽,李平,张旭,王腾..PULSAR低轨卫星导航星座性能分析研究[J].航天器工程,2024,33(1):1-10,10.
