Impact of Sample Rate of IGS Satellite Clock on Precise Point Positioning
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摘要: 使用IGS 5 min、30 s以及CODE最新发布的5 s间隔的精密卫星钟差产品分别进行了静态和动态精密单点定位(PPP)试验。结果表明,使用三种不同采样间隔的精密卫星钟差对静态PPP定位结果的影响很小,均能满足mm至cm级的静态定位精度,采样率更高的精密卫星钟差改正对静态定位结果无显著改善;对动态PPP定位,三种采样间隔的精密卫星钟差均能满足cm至dm级的定位精度,使用30 s间隔的精密卫星钟差较使用5 min间隔的精密卫星钟差,其定位精度提高了30%~50%,而使用5 s间隔的精密卫星钟差同使用30 s间隔的精密卫星钟差获得的定位精度基本一致。Abstract: 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.
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Keywords:
- precise satellite clock error /
- sampling rate /
- precise point positioning /
- accuracy
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