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Sensors 2017, 17(6), 1233; doi:10.3390/s17061233

Performance of BDS-3: Measurement Quality Analysis, Precise Orbit and Clock Determination

1
GNSS Research Center, Wuhan University, Wuhan 430079, China
2
Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China
*
Author to whom correspondence should be addressed.
Received: 12 March 2017 / Revised: 25 May 2017 / Accepted: 25 May 2017 / Published: 28 May 2017
(This article belongs to the Section Remote Sensors)
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Abstract

Since 2015, China has successfully launched five experimental BeiDou global navigation system (BDS-3) satellites for expanding the regional system to global coverage. An initial performance assessment and characterization analysis of the BDS-3 is presented. Twenty days of tracking data have been collected from eleven monitoring stations. The tracking characteristics and measurement quality are analyzed and compared with the regional BDS (BDS-2) in terms of observed carrier-to-noise density ratio, pseudo-range multipath, and noise. The preliminary results suggest that the measurement quality of BDS-3 outperforms the BDS-2 for the same type of satellites. In addition, the analysis of multipath combinations reveals that the problem of satellite-induced code biases found in BDS-2 seems to have been solved for BDS-3. Precise orbit and clock determination are carried out and evaluated. The orbit overlap comparison show a precision of 2–6 dm in 3D root mean square (RMS) and 6–14 cm in the radial component for experimental BDS-3 satellites. External validations with satellite laser ranging (SLR) show residual RMS on the level of 1–3 dm. Finally, the performance of the new-generation onboard atomic clocks is evaluated and results confirm an increased stability compared to BDS-2 satellite clocks. View Full-Text
Keywords: BeiDou; multipath combination; code pseudo-range; precise orbit determination; clock stability BeiDou; multipath combination; code pseudo-range; precise orbit determination; clock stability
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Xie, X.; Geng, T.; Zhao, Q.; Liu, J.; Wang, B. Performance of BDS-3: Measurement Quality Analysis, Precise Orbit and Clock Determination. Sensors 2017, 17, 1233.

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