基于IGU星历的实时卫星钟差加密方法研究

主要介绍了利用IGS提供的超快速观测星历和预报星历进行5 min和30 s实时卫星钟差获取的方法,并对利用这两种星历文件获取的卫星钟差与IGS提供的最终星历做比较,最后得出结论：基于IGS的超快速观测星历采用线性模型预报实时卫星钟差的精度高于基于IGS超快速预报星历采用三次样条函数直接内插获得的实时卫星钟差的精度,可以达到3 ns,能够满足一般实时单点定位的精度要求。

The Research of Real-time Satellite Clock Offset based on the IGS Ephemeris

This paper mainly introduces the use of the ultra-rapid observed file and predicted file provided by IGS satellite ephemeris on the interval of 15 min and 30 s,and compares the satellite clock offset getting by this two methods with the satellite clock offset provided by the IGS final ephemeris file.Finally we can concludes that the accuracy of using linear model based on the observation file higher than the accuracy of using the Cubic-spline interpolation based on the predicted file,which can reach to 3 ns,and can satisfy the accuracy of the general real-time single point positioning.