全球定位系统2025，Vol.50Issue(3)：31-37,7.DOI:10.12265/j.gnss.2024189
北斗三号组合和非组合PPP模型对时间传递的影响
Impact of ionosphere-free and uncombined PPP models of BDS-3 on time transfer
摘要
Abstract
With the continuous development of GNSS,the research on high-precision time transfer based on precise point positioning(PPP)technology has become one of the key technologies in the field of time and frequency.In this paper,the receiver clock offset of the BeiDou-3 system is taken as the research object,and the influence of ionospheric-free and uncombined PPP models on time transfer is analyzed.Firstly,the differences between the two PPP mathematical models are derived,and the observation data of two external hydrogen atomic clocking stations BRUX and USN7 of day of year 79～81 in 2024 are selected for analysis.The results show that the receiver clock difference calculated by the two PPP models fluctuates within 0.15 ns,and the corrected Allan variance value is similar.For the BRUX and USN7 time link analysis,the time transfer results fluctuate within 0.8 ns within three days,the Allan variance values of the two models for solving the clock offset correction are approximate.In summary,although the two PPP models have different theoretical models for the numerical solution of the clock offset,there is no significant difference between the two models in terms of the clock offset solution and time transfer,the uncombined model can be used for time transfer and has more advantages in retaining ionospheric information.关键词
时间传递/接收机钟差/精密单点定位(PPP)/无电离层(IF)组合模型/非组合模型Key words
time transfer/receiver clock offset/precise point positioning(PPP)/ionospheric-free(IF)model/uncombined model分类
天文与地球科学引用本文复制引用
卞逸驰,王生亮,肖恭伟,岳利民,王宁波,杨一博..北斗三号组合和非组合PPP模型对时间传递的影响[J].全球定位系统,2025,50(3):31-37,7.基金项目
国家重点研发计划(2023YFC2206100) （2023YFC2206100）
中国国家铁路集团有限公司科技研究开发计划(L2022X004) （L2022X004）
山西省高等学校科技创新计划(2024L225) （2024L225）
山西省基础研究计划(自由探索类)青年项目(202203021212284) （自由探索类）
