The precise orbit determination (POD) of low earth orbit (LEO) satellites is always a hotspot topic in the field of satellite geodesy. Current gravity field determination, satellite altimetry, and remote sensing measurement depend crucially on the precise orbits of the spacecraft. BeiDou global navigation satellite system (BDS-3) is officially completed in 2020 and offers positioning, navigation, and timing (PNT) service for global users. The onboard BDS measurements from LEO satellites can be used for LEO POD and served as an effective supplement for BDS tracking geometry. In this study, the BDS-3 observations with B1C and B2a signals of HY-2D spacecraft are employed for reduced-dynamic POD. For superior orbit quality, the extended analytical model for solar radiation pressure (SRP) is used for LEO POD, and in-flight calibration of the LEO receiver antenna is carried out to improve the orbit precision. Two weeks of onboard BDS-3 observation were used to assess the BDS-based POD performance. For HY-2D satellite based on BDS-3 instruments, the capability of continuous tracking is at the global level, and almost all the epochs can have 5–7 usable BDS satellites. The mean root-mean-squared (RMS) of the phase residual obtained from the reduced-dynamic POD is 6.5 mm, and that of pseudorange residual is 1.28 m. The internal precision for the entire arc is in good agreement. Moreover, an orbit self-consistency of 0.94 cm, 0.76 cm, and 0.49 cm is displayed in the along-track, cross-track, and radial directions, respectively.
The 1.33 cm 3D RMS of the internal consistency is achieved for the reduced-dynamic orbits. A better than 2 cm RMS has been achieved in the Satellite Laser Ranging (SLR) validation for BDS-3-based LEO orbit solutions. These results could be used for the Chinese subsequent LEO satellite equipped with a BDS-3 receiver.
Precise Orbit Determination of LEO Satellite Using Onboard BDS-3 B1C/B2a Observations
Lect. Notes Electrical Eng.
China Satellite Navigation Conference (CSNC 2022) Proceedings ; Kapitel : 12 ; 134-146
2022-05-05
13 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Precise Orbit Determination of LEO Satellite Using Onboard BDS-3 B1C/B2a Observations
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