Application of Independently Estimated DCB and Ionospheric TEC in Single-Frequency PPP

摘要: Precise Point Positioning technology is one of the most interesting research topics within GNSS positioning and navigation community in last decade for a number reasons: simplified operation, cost-effectiveness no base stations required. With availability dual-frequency receivers precise GPS products, PPP has demonstrated capable providing centimeter to decimeter level point accuracy globally. As single-frequency PPP, deceases, particularly height component. One dominant factor this degradation effect unmodeled ionospheric delay. This paper investigates technique using data as are widely used tools tracking, geo-referencing. Since error biggest source receiver based on system, an mitigation method named POLY model regional reference station network introduced reason that it can provide independent DCB TEC. In addition, three other different methods, Klobuchar model, GIM GRAPHIC algorithm, assessed their compared. Numerical results show offers better performance than method, which able approximately 0.5 m static over 24 h observation period.