GPS广播星历位置、速度和钟差精度分析

ANALYSIS OF PRECISION OF POSITION VELOCITY AND CLOCK OF GPS SATELLITES BROADCAST EPHEMERIS

讨论了广播星历精度分析预处理的关键问题,统计了10 d卫星位置、速度和钟差误差。结果表明,卫星轨道各方向误差均小于2 m,卫星钟差均值和均方根均小于8 ns,卫星速度偏差小于0.5 m/s,空间测距误差小于2.5 m。相对于2006年的统计结果,精度有了一定程度的提高。

The accuracy of satellite position, velocity and clock errors of global positioning system（GPS） broadcast ephemeris were analyzed in the paper. The results reveal orbits errors are less than 2 m, mean value and rootmean-square （RMS） of satellite clocks are less than 8 ns, velocity errors less than 0.5 m/s and signal-in-space range error（SISRE） less than 2.5 m. Compared with the consquence in 2006, positions, velocities and clocks are improved.