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Long-term comparisons between two-way satellite and geodetic time transfer systems

机译:双向卫星和大地时间传输系统之间的长期比较

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摘要

Global Positioning System (GPS) observations recorded in the United States and Europe were used to evaluate time transfer capabilities of GETT (geodetic time transfer). Timing estimates were compared with two-way satellite time and frequency transfer (TWSTFT) systems. A comparison of calibrated links at the U.S. Naval Observatory, Washington, D.C., and Colorado Springs, CO, yielded agreement of 2.17 ns over 6 months with a standard deviation of 0.73 ns. An uncalibrated link between the National Institute of Standards and Technology (NIST) and Physikalisch-Technische Bundesanstalt, Braunschweig, Germany, has a standard deviation of 0.79 ns over the same time period.
机译:在美国和欧洲记录的全球定位系统(GPS)观测值用于评估GETT(大地时间传递)的时间传递能力。将定时估计与双向卫星时间和频率传输(TWSTFT)系统进行了比较。在华盛顿特区的美国海军天文台和科罗拉多州的科罗拉多斯普林斯进行的校准链路比较,在6个月内产生了2.17 ns的一致性,标准偏差为0.73 ns。美国国家标准技术研究院(NIST)与德国不伦瑞克物理技术联合会之间的未经校准链接在同一时间段内的标准偏差为0.79 ns。

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