朱轶群,吴继忠

• 1:温州市勘察测绘研究院
• 2:南京工业大学测绘科学与技术学院

摘要(Abstract)：

准天顶卫星系统目前利用QZS-2～QZS-4 3颗卫星播发L6E信号,为东亚和大洋洲地区用户提供实时的增强服务。该文分析了L6E信号结构及轨道和钟差的计算模型,研究了目前L6E信号的覆盖范围和可用性,评估了L6E改正数恢复的卫星轨道和钟差及其用于动态PPP的精度水平。结果表明:我国用户在使用15°截止高度角时L6E信号仍有100%的可用性;L6E改正数恢复的GPS和GLONASS卫星轨道的3D RMS平均值分别为5.3和13.9 cm,卫星钟差的STD平均值分别为0.14和0.22 ns,利用GPS卫星的轨道和钟差进行的动态PPP可以获得水平优于10 cm、高程优于15 cm的精度,在加入GLONASS卫星后,东方向和高程方向定位误差和收敛时间均有明显改善。

关键词(KeyWords)： 准天顶卫星系统;增强服务;L6信号;SSR改正;精密单点定位

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目（41974214）

作者(Author): 朱轶群,吴继忠

DOI: 10.16251/j.cnki.1009-2307.2021.02.006

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