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Sub-10 –16 accuracy GNSS frequency transfer with IPPP
GPS Solutions ( IF 4.9 ) Pub Date : 2021-01-02 , DOI: 10.1007/s10291-020-01062-2
Gérard Petit

Precise point positioning (PPP) using dual-frequency GNSS code and phase measurements has been the technique of choice for time and frequency transfer for more than a decade. Several analysis centers providing the satellite orbit and clock products used in PPP now make use of ambiguity resolution methods that preserve the integer nature of the carrier phase ambiguities, thus allowing the development of integer ambiguity PPP techniques (IPPP). By comparison with independent highly stable time transfer techniques not GNSS based, we show that IPPP provides time transfer stability and frequency transfer accuracy with improved long-term performance of order 7 × 10–16/T, where T is the duration in days of continuous phase measurements, thus reaching the sub − 10–16 level after one week of averaging. This method can readily be put into operation between any two locations equipped with such GNSS receivers which have become ubiquitous equipment in scientific institutes. The analysis procedure is described in some detail, summarizing lessons learned from many years of experience and pointing out the necessary checks and the practical points that are needed to ensure that optimal results will be obtained.



中文翻译:

具有IPPP的Sub-10 –16精度GNSS频率传输

十多年来,使用双频GNSS代码和相位测量的精确点定位(PPP)已成为时间和频率传输的首选技术。一些提供PPP中使用的卫星轨道和时钟产品的分析中心现在利用模糊度解析方法来保留载波相位模糊度的整数性质,从而允许开发整数模糊度PPP技术(IPPP)。通过与非基于GNSS的独立高度稳定的时间传输技术进行比较,我们表明IPPP提供了时间传输稳定性和频率传输精度,并改善了7×10 –16 / T量级的长期性能,其中T是连续天数的持续时间相位测量,从而达到sub − 10 –16平均一周后的水平。这种方法可以很容易地在装有这种GNSS接收器的任何两个位置之间进行操作,这些位置已成为科研机构中的普遍设备。详细介绍了分析过程,总结了从多年经验中汲取的经验教训,并指出了必要的检查和确保获得最佳结果所需的实践要点。

更新日期:2021-01-02
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