GPS系列卫星广播星历轨道和钟的精度分析

Precision Analysis on Orbit and Clock of GPS Satellites Broadcast Ephemeris

指出了在对GPS广播星历精度进行比较分析之前必须处理好的一些关键问题;统计了短期内(连续两周)所有GPS卫星的广播星历轨道误差及钟误差,并着重从卫星自身角度对其精度加以分析。分析结果表明,当前广播星历的轨道精度已经达到2 m,钟差精度达到10 ns左右;不同类型卫星的精度状况有所差异,主要体现在其稳定性方面,Block IIR卫星优于Block IIA卫星,铷钟卫星短期稳定性优于铯钟卫星。

We pointd out several key issues, which should be well resolved sion analysis of GPS broadcast ephemeris. Statistical analysis of both the accuracy were presented with a test of a period of two weeks, mainly from ellite itself. The orbital accuracy reached 2-3 m, and the clock precision nanoseconds. In addition, The precision varies from satellites to satelli Block IIR were superior to that of Block IIA, while rubidium clocks were b clocks, especially in the acpect of stability.