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首页> 外文期刊>Advances in space research >Improvement of orbit determination accuracy for Beidou Navigation Satellite System with Two-way Satellite Time Frequency Transfer
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Improvement of orbit determination accuracy for Beidou Navigation Satellite System with Two-way Satellite Time Frequency Transfer

机译：双向卫星时频转换提高北斗导航卫星系统定轨精度

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摘要

The Beidou Navigation Satellite System (BDS) manages to estimate simultaneously the orbits and clock offsets of navigation satellites, using code and carrier phase measurements of a regional network within China. The satellite clock offsets are also directly measured with Two-way Satellite Time Frequency Transfer (TWSTFT). Satellite laser ranging (SLR) residuals and comparisons with the precise ephemeris indicate that the radial error of GEO satellites is much larger than that of IGSO and MEO satellites and that the BDS orbit accuracy is worse than GPS. In order to improve the orbit determination accuracy for BDS, a new orbit determination strategy is proposed, in which the satellite clock measurements from TWSTFT are fixed as known values, and only the orbits of the satellites are solved. However, a constant systematic error at the nanosecond level can be found in the clock measurements, which is obtained and then corrected by differencing the clock measurements and the clock estimates from orbit determination. The effectiveness of the new strategy is verified by a GPS regional network orbit determination experiment. With the IGS final clock products fixed, the orbit determination and prediction accuracy for GPS satellites improve by more than 50% and the 12-h prediction User Range Error (URE) is better than 0.12 m. By processing a 25-day of measurement from the BDS regional network, an optimal strategy for the satellite-clock-fixed orbit determination is identified. User Equivalent Ranging Error is reduced by 27.6% for GEO satellites, but no apparent reduction is found for IGSO/MEO satellites. The SLR residuals exhibit reductions by 59% and 32% for IGSO satellites but no reductions for GEO and MEO satellites.
机译：北斗导航卫星系统（BDS）使用中国区域网络的代码和载波相位测量，可以同时估计导航卫星的轨道和时钟偏移。卫星时钟偏移也可以通过双向卫星时间频率传输（TWSTFT）直接测量。卫星激光测距（SLR）残差以及与精确星历的比较表明，GEO卫星的径向误差远大于IGSO和MEO卫星的径向误差，并且BDS轨道精度比GPS差。为了提高BDS的轨道确定精度，提出了一种新的轨道确定策略，其中将来自TWSTFT的卫星时钟测量值固定为已知值，并且仅解决卫星的轨道。但是，可以在时钟测量结果中找到纳秒级的恒定系统误差，该误差可通过对时钟测量结果和来自轨道确定的时钟估计值求差来获得并进行校正。 GPS区域网络轨道确定实验验证了该新策略的有效性。固定了IGS最终时钟产品后，GPS卫星的轨道确定和预测精度提高了50％以上，并且12小时预测用户范围误差（URE）优于0.12 m。通过处理来自BDS区域网络的25天测量，确定了确定卫星时钟固定轨道的最佳策略。 GEO卫星的用户等效测距误差降低了27.6％，但IGSO / MEO卫星的用户等效测距误差没有明显降低。 IGSO卫星的SLR残留量减少了59％和32％，而GEO和MEO卫星则没有减少。

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  • 来源
    《Advances in space research》 |2016年第7期|1390-1400|共11页
  • 作者

    Chengpan Tang; Xiaogong Hu; Shanshi Zhou; Rui Guo; Feng He; Li Liu; Lingfeng Zhu; Xiaojie Li; Shan Wu; Gang Zhao; Yang Yu; Yueling Cao;

  • 作者单位

    Shanghai Astronomy Observatory, Chinese Academy of Science, Shanghai 200030, China,University of Chinese Academy of Science, Beijing, China;

    Shanghai Astronomy Observatory, Chinese Academy of Science, Shanghai 200030, China,Shanghai Key Laboratory of Space Navigation and Positioning Techniques, Shanghai, China;

    Shanghai Astronomy Observatory, Chinese Academy of Science, Shanghai 200030, China;

    Beijing Navigation Center, Beijing, China;

    Beijing Navigation Center, Beijing, China;

    Beijing Navigation Center, Beijing, China;

    Beijing Navigation Center, Beijing, China;

    Beijing Navigation Center, Beijing, China;

    Beijing Navigation Center, Beijing, China;

    Shanghai Astronomy Observatory, Chinese Academy of Science, Shanghai 200030, China;

    Shanghai Astronomy Observatory, Chinese Academy of Science, Shanghai 200030, China;

    Shanghai Astronomy Observatory, Chinese Academy of Science, Shanghai 200030, China;

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  • 正文语种 eng
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  • 关键词

    Beidou Navigation Satellite System; Two-way Satellite Time Frequency Transfer; Satellite orbit determination; Satellite laser ranging;

    机译：北斗导航卫星系统;两路卫星时间频率转换;卫星轨道确定;卫星激光测距;

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