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Physikalisch-Technische Bundesanstalt

StructureDiv. 4 Optics4.4 Time and Frequency > 4.42 Dissemination of Time
Dissemination of Time
Working Group 4.42



Working Group 4.42 is involved in studies on the improvement of time transfer methods. Recently carrier-phase two-way satellite time and frequency transfer (TWSTFT) was successfully demonstrated over a very long baseline of 9,000 km, established between the National Institute of Information and Communications Technology (NICT) and PTB. The necessary equipment was provided by NICT. The most important result was that a short-term instability for frequency transfer of 2 × 10−13 at 1 s was achieved. The graph below shows the relative frequency instability obtained using the different methods of time transfer. More details can be found in Metrologia 51 (2014) 253-262.





Head of Working Group Dr. Andreas Bauch
Phone: +49-531 592-4420
Fax: +49-531 592-4479
E-Mail: andreas.bauch@ptb.de

Office Martina Bäumler
Phone: +49-531 592-4419
Fax: +49-531 592-4479
E-Mail: martina.baeumler@ptb.de

Address Physikalisch-Technische Bundesanstalt
Arbeitsgruppe 4.42
Bundesallee 100
38116 Braunschweig

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