BDS-3 precision analysis of precise point positioning
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摘要: 2020年7月31日,北斗三号全球卫星导航系统(BDS-3)正式开通. BDS-3增加播发B1C、B2a新信号,结合原有北斗二号(BDS-2)的B1I、B2I、B3I信号,5个频点形成7种消电离层组合,进行双频精密单点定位(PPP)研究,结果表明所有组合PPP定位精度在厘米级.
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关键词:
- 北斗三号(BDS-3) /
- 精密单点定位(PPP) /
- 消电离层组合
Abstract: The construction of the third-generation of Chinese BeiDou navigation system (BDS-3) was officially completed the construction on July 31, 2020. The BDS-3 provided new signals, B1C and B2a. Combining with B1I, B2I, and B3I signals from the second-generation of Chinese BeiDou novigation system (BDS-2), the article formed seven ionosphere-free combinations between different frequency to conduct dual frequency Precise Point Positioning (PPP) research. Results show that the positioning accuracy of all PPP combinations is on the order of centimeters. -
表 1 BDS-3公开服务信号体制
频点 信号 中心频率/MHz 调制方式 信息速率/bps 兼容互操作 B1 B1C_data 1 575.420 BOC (1, 1) 50 GPS L1 B1C_pilot QMBOC (6, 1, 4/33) 0 Galileo E1 B1I 1 561.098 BPSK (2) 50(MEO/IGSO), 500(GE0) − B2 B2a_data 1 176.450 QPSK (10) 100 GPS L5 B2a_pilot 0 Galileo E5a B3 B3I 1 268.520 BPSK (2) 50(MEO/IGSO), 500(GE0) − 表 2 具体的PPP策略
项目 策略 电离层延迟 消电离层组合 对流层延迟 UNB3m 模型 频点 单频(B1I, B2I,B3I, B1C, B2a) 卫星天线PCO与PCV IGS_Atx_14 卫星截止高度角/(°) 5 固体潮 IERS2010 海洋潮 IERS2010 极潮 IERS2010 天线相位缠绕 Wu mode 接收机钟差 白噪声估计 站坐标参考 SNX周解文件 -
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