Impact of Sample Rate of IGS Satellite Clock on Precise Point Positioning

Both static and kinematic tests were investigated by using IGS 5 min,30 s and 5 s-interval precise satellite clock product in precise point positioning(PPP) solution.Test results show that the sample rate of IGS satellite clock has little effect on the static PPP solution.All the three types of sampling interval of precise satellite clock can satisfy mm-cm level positioning accuracy.A higher sampling rate has no significant improvement for PPP solution.While in kinematic PPP,sample rate of satellite clock has significant impact on the PPP solution,The higher the interval of satellite clock is,the better accuracy achieves.The accuracy of kinematic PPP achieved by using 30 s-interval precise satellite clock is improved by nearly 30%-50% with respect to the solution by using 5 min-interval precise satellite clock.While using 5 s and 30 s-interval satellite clock almost produce the same accuracy of kineamtic solution.