GPS卫星星历的精度分析

PRECISION ANALYSIS OF GPS SATELLITE EPHEMERIDES

利用全球GPS永久性跟踪站WUHN(武汉)站在SA取消前后五天的广播星历文件计算得到在视卫星的位置和钟差,与事后IGS精密星历提供的卫星位置和钟差进行比较分析,说明SA取消对广播星历的影响。

This paper compares the position and clock offset of the satellites insight obtained from the broadcast ephemerides file five days prior and posterior to the cancel of SA policy on WUHN station with that provided by final IGS precise ephemerides. by which the position precision of GPS satellite is prior to 5cm and the precision of clock offset can be achieved to 0.1-0.2ns.