北斗三号PPP-B2b服务的卫星定轨精度评估  

Accuracy evaluation on satellite orbit determination of BDS-3 PPP-B2b service

作　　者：姜蔚 陈向东 邢云剑 董杰 丛睿昊 JIANG Wei;CHEN Xiangdong;XING Yunjian;DONG Jie;CONG Ruihao(State Grid Location Based Service Co.,Ltd.,Beijing 102209,China)

机构地区：[1]国网思极位置服务有限公司,北京102209

出　　处：《全球定位系统》2023年第1期32-36,共5页Gnss World of China

摘　　要：随着北斗三号全球卫星导航系统(BDS-3)的成功组网,新启用的B2b信号由于承载着精密单点定位(PPP)服务而备受关注,但该信号的应用尚未普及,为探究PPP-B2b信号的服务性能,针对自研板卡接收的B1C和PPP-B2b导航电文数据,以德国地学研究中心(GFZ)提供的精密星历产品及其插值结果为参考基准,计算卫星定轨结果与参考基准的互差序列和均方根误差(RMSE),评估广播星历和PPP-B2b精密改正轨道的轨道精度.结果表明:广播轨道在径向(R)、切向(T)、法向(N)的精度均值分别为0.19 m、0.65 m和0.89 m;精密改正轨道在R、T、N的精度均值分别为0.13 m、0.32 m和0.29 m;自研板卡接收的PPP-B2b信号满足PPP的应用要求,为下一步开发基于PPP-B2b信号的相关产品提供数据参考.With the successful networking of the BeiDou-3 Navigation Satellite System, the B2b, a new signal, can provide precise point positioning(PPP)service, which has attracted more and more attention.However, its application was not yet widespread. To explore the performance of the PPP-B2b service signal,we calculated the results of satellite orbit determination based on the B1C and PPP-B2b navigation message data received by our original-designed board. The simulation results compared with that based on the precision ephemeris products and their interpolation results provided by the German Geoscience Research Center. Two error indices(the cross-difference sequence and the root mean square error)were calculated to evaluate the orbit accuracy after broadcast ephemeris and PPP-B2b precise orbit correction. The results show that the broadcast orbit accuracy is generally 0.19 m, 0.65 m and 0.89 m in the radial(R), tangential(T)and normal(N)directions. The average accuracy of precise orbit correction is generally 0.13 m, 0.32 m and 0.29m in the R、 T 、N directions, respectively. The PPP-B2b service signal received by our original-designed board can satisfy the application requirements of precise point positioning. This would provide data reference for the next development of related products based on PPP-B2b signal.

关 键 词：北斗三号全球卫星导航系统(BDS-3) 18参数模型 PPP-B2b Neville插值 轨道精度评估 

分 类 号：P228.4[天文地球—大地测量学与测量工程]