Performance of BDS-3: Measurement Quality Analysis, Precise Orbit and Clock Determination.
Performance of BDS-3: Measurement Quality Analysis, Precise Orbit and Clock Determination.
复制标题
北斗三号性能：测量质量分析、精准定轨和时钟确定
DOI：
10.3390/s17061233
复制
发表时间：
2017-05-28
期刊：
影响因子：
--
通讯作者：
Wang B
中科院分区：
文献类型：
--
作者：
Xie X;Geng T;Zhao Q;Liu J;Wang B
自2015年以来，中国成功发射了五颗北斗全球导航系统（BDS-3）试验卫星，将区域系统扩展到全球覆盖范围。BDS-3的初步性能评估和表征分析。从11个监测站收集了20天的跟踪数据。分析了其跟踪特性和测量质量，并与区域BDS（BDS-2）在观测载噪密度比、伪距多径和噪声方面进行了比较。初步结果表明，BDS-3的测量质量优于BDS-2的同类型的卫星。此外，多径组合的分析表明，卫星引起的代码偏差的问题，发现在BDS-2似乎已经解决了BDS-3。进行了精确的轨道和时钟测定并进行了评价。轨道重叠比较表明，BDS-3实验卫星的三维均方根精度为2-6 dm，径向分量精度为6-14 cm。卫星激光测距（SLR）的外部验证表明，残留RMS水平为1-3 dm。最后，对新一代星载原子钟的性能进行了评估，结果证实与BDS-2卫星钟相比，其稳定性有所提高。
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.