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- 2018
北斗全球卫星导航系统试验卫星测距信号质量分析
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Abstract:
目前，北斗全球卫星导航系统有5颗试验卫星发射试验信号。试验卫星数据质量分析是北斗全球系统信号体制验证的重要内容。基于单测站北斗试验卫星观测数据，采用伪距相位差组合和伪距多径组合方法，初步分析了试验卫星民用信号以及Bs频点信号伪距测量噪声和多径误差。结果表明，倾斜同步轨道卫星伪距测量精度优于中轨道卫星；在各导航信号中，B2a+b信号伪距测量精度最高，具有最优的抗多径性能；B1C信号伪距测量精度最低，抗多径性能最差；Bs信号伪距测量精度较差，但优于B1C信号，且其伪距多径存在一个与高度角相关的系统误差，在高度角最大时可达0.5 m
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