Recent and Future Activities at Leibniz University Hannover in GNSS Frequency Transfer

authored by
Thomas Krawinkel, Steffen Schön, Andreas Bauch

Frequency transfer (FT) based on Global Navigation Satellite System (GNSS) precise point positioning (PPP) enables global comparison of local time scales that are each connected to a GNSS receiver. We use our in-house PPP software to examine the current limits of this technique and extend the classical analysis approach to new GPS and Galileo signals. We also investigate the impact of receiver clock modeling (RCM). For this, we carried out a dedicated experiment at Germany's national metrology institute, the Physikalisch-Technische Bundesanstalt (PTB), where four geodetic receivers - operating in a controlled environment - were connected to one single GNSS antenna and the same UTC(PTB) signal. The link instability of two receivers of the same type is better as compared with the use of receivers of different types. Overall, Galileo signals lead to better FT performance than GPS signals. When using the latter, with modern L2C signals we obtain FT instabilities that are at least comparable to those based on legacy L2 P-code observations. The application of RCM especially improves the short-term link instability. Therefore, this should be studied more in-depth in the future since it can be a valuable approach in GNSS-based FT.

Institute of Geodesy
QUEST-Leibniz Research School
CRC 1464: Relativistic and Quantum-Based Geodesy (TerraQ)
Conference contribution
No. of pages
Publication date
Publication status
Peer reviewed
ASJC Scopus subject areas
Electronic, Optical and Magnetic Materials, Instrumentation, Atomic and Molecular Physics, and Optics
Electronic version(s) (Access: Closed)

Details in the research portal "Research@Leibniz University"