Abstract: | Two Geodetic Time Transfer terminals (GeTT) were installed at the Physikalisch-Technische Bundesanstali (PTB), Braunschweig, Germany and at the U.S. Naval Observatory (USNO), Washington, DC. The receivers store GPS Carrier Phase (GPS CP) data as well US GPS Pseudorange (GPS PR) observations from both frequencies. This time and frequency transfer experiment over the Atlantic has now been running for more than 2 years. Comparisons of the results from our GPS-based time series with other, independent methods like Common View (CV) and Two-Way Satellite Time and Frequency Transfer (TWSTFT) allows one to study the long-term stability of these techniques. The analysis of GPS data gives differences between two clocks with a high sampling rate (300 seconds or even less). Therefore, GPS permits the possibility of comparing two clocks nearly continuously over intercontinental distances. High-quality GPS products, e.g. satellite orbits, are necessary to get good results for the clock estimation. We will compare the time transfer results using the final and the rapid products from the Center for Orbit Determination in Europe (CODE), one of the analysis centers of the International GPS Service (IGS). Using the rapid products the time transfer results are available at approximately 1800 UT the day after the observations. The final solution is usually available I week later. |
Published in: |
Proceedings of the 32th Annual Precise Time and Time Interval Systems and Applications Meeting November 28 - 30, 2000 Hyatt Regency Reston Town Center Reston, Virginia |
Pages: | 67 - 78 |
Cite this article: | Dach, R., Schildknecht, T., Springer, T., Dudle, G., Prost, L., "A Transatlantic GeTT Time Transfer Experiment - Latest Results," Proceedings of the 32th Annual Precise Time and Time Interval Systems and Applications Meeting, Reston, Virginia, November 2000, pp. 67-78. |
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