Publication Date:
2023-04-27
Description:
The feasibility of BeiDou satellite navigation System (BDS-3) based real-time orbit determination (RTOD) of low earth orbit (LEO) satellites using new onboard B1C and B2a signals is assessed from the Haiyang-2D (HY-2D) satellite. In this study, the achievable accuracy and convergence time of RTOD for the HY-2D using onboard BDS-3 and GPS observations are analyzed. For the HY-2D orbit, the three-dimensional (3D) and radial accuracies can reach 31.8 cm and 7.5cm with only BDS-3 observations, around 50% better than the corresponding accuracies with GPS. The better performance of the BDS-3 in RTOD for the HY-2D is attributed to the high quality of its broadcast ephemeris. When random parameters are used to absorb ephemeris errors, substantial improvement is seen in the accuracy of HY-2D orbit with either BDS-3 or GPS. The 3D RMS of HY-2D orbit errors with BDS-3 and GPS are enhanced to 23.1 cm and 33.6 cm, and the RMS of the radial components are improved to 6.1 cm and 13.3 cm, respectively. The convergence time is 41.6 and 75.5 minutes for the RTOD with BDS-3 and GPS, while it is reduced to 39.2 and 27.4 minutes after the broadcast ephemeris errors are absorbed by random parameters. Overall, the achievable accuracy of RTOD with BDS-3 reaches decimeter level, which is even better than that with GPS, making real-time navigation using onboard BDS-3 observations a feasible choice for future remote sensing missions.
Language:
English
Type:
info:eu-repo/semantics/conferenceObject
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