Time comparisons between USNO and PTB: a model for the determination of the time offset between GPS time and the future Galileo system time
Time comparisons between USNO and PTB: a model for the determination of the time offset between GPS time and the future Galileo system time
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DOI：
10.1109/freq.2004.1418476
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发表时间：
2004-08
期刊：
影响因子：
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通讯作者：
A. Bauch;Dirk Piester;A. Moudrak;G. Petit
中科院分区：
文献类型：
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作者：
A. Bauch;Dirk Piester;A. Moudrak;G. Petit
除其他措施外，应通过广播两个系统时间（伽利略系统时间（GST）和 GPS 时间（GPST））之间的实际差异来确保伽利略和 GPS 两个卫星导航系统的互操作性。 PTB 时间尺度 UTC(PTB) 的属性在许多方面与 GST 的预期相似。因此，UTC(PTB)-GPST差可以被认为代表GST-GPST差。 UTC(PTB)-GPST 借助两种方法确定：与 USNO 的 TWSTFT 链接，以及通过 GPS 时间接收器接收 GPS 空间信号 (SIS) 来恢复 GPST。所有链路和接收器均已校准。因此，在理想的世界中，所有链接都应该给出相同的结果。在现阶段的数据分析中，我们注意到通过与USNO链接获得的UTC(PTB)-GPST差值与通过双频大地测量接收机接收GPS SIS获得的差值之间存在约7纳秒的差异。
The interoperability of the two satellite navigation systems Galileo and GPS shall be assured by, among other measures, broadcasting the actual difference between the two system times, Galileo system time (GST) and GPS time (GPST). The properties of PTB's time scale UTC(PTB) are in many aspects similar to what is expected for GST. Thus, the difference UTC(PTB)-GPST can be considered to be representative for the GST-GPST difference. UTC(PTB)-GPST was determined with the help of two methods, a TWSTFT link with USNO, and the restitution of GPST from the reception of the GPS signal-in-space (SIS) with GPS time receivers. All links and receivers were calibrated. Therefore, in an ideal world, all links should give the same result. At the current stage of data analysis, we notice a difference of about 7 ns between the UTC(PTB)-GPST difference obtained via the link with USNO and the one obtained from reception of GPS SIS with the dual frequency geodetic receiver.