全球定位系统2025，Vol.50Issue(3)：38-47,10.DOI:10.12265/j.gnss.2024222
基于北斗三号B2b改正数的时间传递与定位性能分析
Evaluation of time transfer and positioning based on BDS-3 B2b correction products
摘要
Abstract
The demand for real-time positioning and time synchronization is increasing in environments such as marine and aerial settings.However,post-processing precision products suffer from long latency,and real-time correction products transmitted over networks are prone to interruptions due to network instability,which severely limits both real-time time synchronization and positioning accuracy.Therefore,this paper investigates time transfer and positioning technologies based on BeiDou-3 Navigation Satellite System(BDS-3)B2b correction products.We design two clock synchronization and positioning experiments and systematically analyze the satellite orbit and clock bias performance of BDS-3 B2b correction products,as well as the time transfer and positioning accuracy compared to existing network-based real-time correction products and ultra-rapid products.The experimental results show that the satellite clock bias accuracy of BDS-3 B2b correction products is better than that of real-time correction products but worse than ultra-rapid products.The satellite orbit accuracy is inferior to other products.For static PPP positioning based on BDS-3 B2b correction products,the 3D positioning accuracy is better than 5 cm,slightly inferior to other products,but the convergence time for single BDS mode is longer.The PPP time transfer accuracy for one day based on BDS-3 B2b correction products is better than 0.11 ns,and the frequency stability is better than 4.1×10-15 for a 6 000 s interval,with only minor differences compared to other products.Thus,the PPP time transfer technology based on BDS-3 B2b correction products can achieve subnanosecond-level time transfer and centimeter-level positioning in environments without network access.关键词
北斗三号(BDS-3)/GPS/时间传递/精密单点定位(PPP)/B2bKey words
BDS-3/GPS/time transfer/precise point positioning(PPP)/B2b分类
天文与地球科学引用本文复制引用
梁子涵,张杰,钟世明,韩金阳,路润民,崔潜..基于北斗三号B2b改正数的时间传递与定位性能分析[J].全球定位系统,2025,50(3):38-47,10.基金项目
武汉市知识创新专项项目(2023010201010082) （2023010201010082）
国家自然科学基金(42174222) （42174222）
中国科学院科研仪器研制项目(YJKYYQ20190062) （YJKYYQ20190062）
