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

作　　者：李鹏远 陈正宇 葛奎 赵祥伟 王虎[4] LI Pengyuan;CHEN Zhengyu;GE Kui;ZHAO Xiangwei;WANG Hu(College of Surveying and Geo-Informatics,Tongji University,Shanghai 200092,China;China Energy Engineering Group Jiangsu Power Design Institute Co.,Ltd.,Nanjing 211102,China;China Energy Engineering Group Anhui Power Design Institute Co.,Ltd.,Hefei 230601,China;Chinese Academy of Surveying and Mapping,Beijing 100830,China)

机构地区：[1]同济大学测绘与地理信息学院,上海200092 [2]中国能源建设集团江苏省电力设计院有限公司,江苏南京211102 [3]中国能源建设集团安徽省电力设计院有限公司,安徽合肥230601 [4]中国测绘科学研究院,北京100830

出　　处：《无线电工程》2024年第4期962-970,共9页Radio Engineering

基　　金：国家自然科学基金(42274044);国家重大研发计划(2022YFB3903902,2022YFB3903900)。

摘　　要：为分析北斗卫星导航系统(Beidou Navigation Satellite System,BDS)B1C/B2a新信号的服务水平,基于混合差分的方法,结合全球均匀分布的观测站数据解算得到BDS精密钟差,进一步估计宽窄巷未校准相位延迟(Uncalibrated Phase Delay,UPD)。使用二次差法对所估计的BDS-3钟差精度进行评估分析,验证估计产品的准确性;通过UPD产品长期序列来研究其稳定性;将估计的钟差和UPD等产品应用于精密单点定位浮点解和固定解(Precise Point Positioning-Ambiguity Resolution,PPP-AR)进行验证。根据数据处理结果可知,地球静止轨道(Geosynchronous Earth Orbit,GEO)、倾斜地球同步轨道(Inclined Geosynchronous Satellite Orbit,IGSO)和中地球轨道(Medium Earth Orbit,MEO)3种轨道类型的估计卫星钟差平均精度分别为0.209、0.095、0.087 ns;BDS-3宽巷UPD长期序列标准差(Standard Deviations,STD)均在0.04周以内,窄巷UPD一天内的最大变化不超过0.15周,BDS-2宽窄巷UPD的稳定性略差于BDS-3;全球范围内均匀挑选的测站PPP浮点解的平均定位精度在北(North,N)、东(East,E)、天(Up,U)各方向分别为2.21、3.50、6.01 cm,经模糊度固定后,固定解分别提升至1.11、1.26、3.50 cm,提升了49.8%、64.0%、41.8%,验证了估计钟差和UPD方法的正确性与新信号良好的服务性能。To analyze the service performance of the Beidou Navigation Satellite System(BDS)new signal(B1C/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 

分 类 号：P228[天文地球—大地测量学与测量工程]