Modelling and Assessment of Single-Frequency PPP Time Transfer with BDS-3 B1I and B1C Observations

Modelling and Assessment of Single-Frequency PPP Time Transfer with BDS-3 B1I and B1C Observations

Blog Article

BDS-3 is now providing global positioning, navigation and timing (PNT) services.BDS-3 has new B1C, B2a and B2b signals compared to BDS-2.This work presents two single-frequency (SF) PPP time transfer models using BDS-3, B1C and B1I observations, and studies the performance of BDS-3 SF PPP time transfer by using 30-day data of 10 globally distributed stations from a multi-GNSS experiment (MGEX).We found that the ionospheric constraint SF PPP (SF1) time transfer model outperforms the Cleaning / Dishwashing Aprons method of SF PPP with the receiver clock offset at first epoch as the datum (SF2).

Importantly, the statistical uncertainty of SF1 was less than 1 nanosecond, with (0.75, 0.71) ns in the average scheme for all time-links, using both B1I and B1C observations, respectively.The frequency stability of SF1 with B1C observations was improved from 1.

73% to 13.04% in the short-term and from 0.88% to 17.49% in the long term, compared CINNAMON QUILLS to that of B1I for all time-links.

Hence, SF1 with B1C observations was recommended for SF PPP time transfer.