论述了GPS监测站伪距观测量评定广播星历精度的基本方法。
This paper discusses the essential method of using GPS pseudorange data to assess the precision of broadcast ephemeris.
通过对可观测性能分析，得出了这样的结论：仅用伪距和伪距变化率为观测量的组合系统对姿态角误差的可观测性较差。
Observability analysis shows that the integration system, in which only GPS pseudo range and delta pseudo range are the observable, can not assure favorable observability of the attitude error angles.
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