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《工程(英文)》 >> 2020年 第6卷 第8期 doi: 10.1016/j.eng.2019.12.005

MGEX轨道与钟差产品的一致性

German Aerospace Center, German Space Operations Center, Weßling 82234, Germany

收稿日期: 2018-10-31 修回日期: 2019-04-18 录用日期: 2019-06-17 发布日期: 2019-12-11

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摘要

国际全球导航卫星系统(GNSS)服务的多GNSS试点项目的分析中心,为全球导航卫星系统,如全球定位系统(GPS)、格洛纳斯卫星导航系统(GLONASS)、伽利略卫星导航系统(Galileo)、北斗卫星导航系统(BeiDou)以及日本区域系统——准天顶卫星导航系统(QZSS)提供轨道和钟差产品。由于改进了太阳辐射压模型和其他更复杂的模型,近年来这些产品的一致性得到了提高。目前,不同分析中心之间GPS轨道一致性为几厘米,GLONASS和Galileo轨道一致性约为1 dm,北斗二号卫星导航系统(BeiDou-2)轨道一致性为几分米,QZSS轨道一致性为数分米。钟差一致性方面,GPS约为2 cm,GLONASS和Galileo约为5 cm,BeiDou-2约为10 cm。在用于精密单点定位的载波相位建模误差方面,各种产品的一致性分别为GPS 2~3 cm、GLONASS 6~14 cm、Galileo 3~10 cm以及BeiDou-2 10~17 cm。

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