无线电工程2024，Vol.54Issue(4)：962-970,9.DOI:10.3969/j.issn.1003-3106.2024.04.020
北斗三号B1C/B2a新信号精密卫星产品估计及PPP-AR性能研究
Estimation of New B1C/B2a Signals Precision Satellite Products of BDS-3 and Study of PPP-AR Performance
摘要
Abstract
To analyze the service performance of the Beidou Navigation Satellite System(BDS)new signal(BIC/B2a),the precise clock offset of BDS-3 is solved by combining data of global uniformly distributed observation stations based on the mixed-difference method,and the wide lane and narrow lane Uncalibrated Phase Delay(UPD)is further estimated.The accuracy of estimated BDS-3 clock offset is evaluated and analyzed by using the quadratic difference method to illustrate the precision of the estimated clock product.The stability of the UPD product is investigated by their long-term series.Finally,the estimated products are applied to the Precise Point Positioning(PPP)and Precise Point Positioning-Ambiguity Resolution(PPP-AR)for validation.According to the data processing results,the average accuracy of the estimated satellite clock offset for Geosynchronous Earth Orbit(GEO),Inclined Geosynchronous Satellite Orbit(IGSO)and Medium Earth Orbit(MEO)orbit are 0.209,0.095,0.087 ns,respectively.The Standard Deviation(STD)of the long-term sequences of BDS-3 wide lane UPD is within 0.04 cycles.The maximum variation of BDS-3 narrow lane UPD within one day does not exceed 0.15 cycles.The stability of BDS-2 wide and narrow lane UPD is slightly worse than that of BDS-3.The average positioning accuracy of the PPP float solutions for the uniformly selected stations in global is 2.21,3.50,6.01 cm in the direction of North(N),East(E),and Up(U),respectively,and the fixed solutions are improved to 1.11,1.26,3.50 cm after the ambiguity is fixed,which is improved by 49.8％,64.0％,and 41.8％,respectively,verifying the correct estimation method of the clock offset and UPD with good service performance of the BDS-3 new signal.关键词
北斗三号/卫星钟差/未校准相位延迟/精密单点定位/模糊度固定Key words
BDS-3/real-time clock offset estimation/UPD/PPP/AR分类
天文与地球科学引用本文复制引用
李鹏远,陈正宇,葛奎,赵祥伟,王虎..北斗三号B1C/B2a新信号精密卫星产品估计及PPP-AR性能研究[J].无线电工程,2024,54(4):962-970,9.基金项目
国家自然科学基金(42274044) （42274044）
国家重大研发计划(2022YFB3903902,2022YFB3903900)National Natural Science Foundation of China(42274044) （2022YFB3903902,2022YFB3903900）
Key Project of China National Programs for Research and Development(2022YFB3903902,2022YFB3903900) （2022YFB3903902,2022YFB3903900）
