| 引用本文: | 倪少杰,王耀鼎,封欣,等.北斗卫星伪距信号质量评估及偏差校正.[J].国防科技大学学报,2017,39(4):87-91.[点击复制] |
| NI Shaojie,WANG Yaoding,FENG Xin,et al.Quality assessment and error correction of BeiDou satellite pseudorange signal[J].Journal of National University of Defense Technology,2017,39(4):87-91[点击复制] |
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| 北斗卫星伪距信号质量评估及偏差校正 |
| 倪少杰1, 王耀鼎1, 封欣2, 王飞雪1 |
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(1. 国防科技大学 电子科学与工程学院， 湖南 长沙 410073;2. 中国卫星导航定位应用管理中心， 北京 100088)
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| 摘要: |
| 针对北斗卫星信号存在系统性伪距偏差的问题，从多路径角度评估北斗三频信号的质量，验证了该项偏差与卫星轨道类型、卫星仰角及信号频率有关。为消除这一系统性偏差的影响，采用连续分段线性函数建立北斗三频伪距偏差校正模型。与现有的改正模型所不同，所提模型不仅采用了更长时间范围内的北斗实测数据，更为重要的是它顾及了改正数的精度信息。基于动态精密单点定位的实验结果表明，采用所提方法修正后，接收机定位性能有明显提升。 |
| 关键词: 北斗卫星导航系统 伪距偏差 多路径 随机模型 精密单点定位 |
| DOI：10.11887/j.cn.201704013 |
| 投稿日期：2016-01-26 |
| 基金项目:国家自然科学基金资助项目（61403413） |
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| Quality assessment and error correction of BeiDou satellite pseudorange signal |
| NI Shaojie1, WANG Yaoding1, FENG Xin2, WANG Feixue1 |
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(1. College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China;2. China National Administration of GNSS and Applications, Beijing 100088, China)
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| Abstract: |
| Regarding the problem of systematic pseudorange bias in BeiDou navigation system application, the pseudorange observations quality of Beidou triple frequency was analyzed from the multipath angle. The analysis results verified that the bias was related to the type of satellite orbit, satellite elevation angle and the signal frequency. In order to eliminate the effects of this systematic bias, a correction model for triple-frequency pseudorange bias was established with the continuous piecewise linear function. Compared with the traditional correction model, the proposed model used the Beidou measured data from a longer range and considered the accuracy of information of corrections. The correctness and superiority of the proposed model were verified by the experimental results on the basis of the dynamic precise point positioning. |
| Keywords: BeiDou navigation satellite system pseudorange error multipath stochastic model precise point positioning |
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