| Zugriffsnummer | 52588 |
| Dokumenttyp | Konferenzartikel |
| Peer Review | unbekannt |
| Sprache | Englisch |
| Titel | Comparing Frequency Transfer via GNSS and Fiber in a Common-clock Configuration |
| Autor(in); Institution |
Elmaghraby, Ahmed; Gottfried Wilhelm Leibniz Universität Hannover, Hannover, GERMANY
Krahwinkel, Thomas; Gottfried Wilhelm Leibniz Universität Hannover, Hannover, GERMANY
Schön, Steffen; Gottfried Wilhelm Leibniz Universität Hannover, Hannover, GERMANY
Kniggendorf, Ann-Kathrin; 4.3, Quantenoptik und Längeneinheit, PTB-Braunschweig
Kuhl, Alexander; 4.3, Quantenoptik und Längeneinheit, PTB-Braunschweig
Mukherjee, Shambo; 4.3, Quantenoptik und Längeneinheit, PTB-Braunschweig
Kronjäger, Jochen; 4.3, Quantenoptik und Längeneinheit, PTB-Braunschweig
Piester, Dirk; 4.4, Zeit und Frequenz, PTB-Braunschweig
|
| Quelle/Jahr | Proceedings of the 55th Annual Precise Time and Time Interval Systems and Applications Meeting:(2024), 105 - 116 |
| DOI | |
| URL | |
| Verlag | Manassas, VA: Institute of Navigation (ION) |
| Konferenzangaben | 55th Annual Precise Time and Time Interval Systems and Applications Meeting, Long Beach, Calif., 22-25, Januar, 2024, USA |
| Freie Schlagworte | GNSS ; Optical fibre ; Frequency transfer ; Common clock |
| Zusammenfassung | Realizing a clock-based geodetic network with a relative uncertainty level of 10-18 has been a significant objective for the scientific community. This network can be utilized for realizing more accurate geodetic reference frames and for testing the fundamental laws of physics, such as the theory of relativity. Typically, optical fibers are connecting optical clocks in such a network. For the last decades, Global Navigation Satellite Systems (GNSSs) have built a trustful and easy-setup method for frequency and time transfer. However, recently optical fiber link networks showed better frequency instability. In this study, we investigate the limits of GNSS-based frequency transfer links with the help of an optical fiber link as ground truth. Therefore, we analyze the GNSS data acquired in a dedicated common-clock experiment over a 52 km baseline. We focus on developing two algorithms to estimate the receiver clock differences, hence the frequency instability. These are the single difference (SD) approach with ambiguity fixing as a common view technique, and precise point positioning as an all in-view technique. We discuss the frequency instability achieved by the optical fiber link as well. We evaluate further the performance by computing the modified Allan deviation for both cases. The results show that the ambiguity-fixed solution of SD-CV improves the relative frequency instability via GNSS to reach the order of 3–5 · 10-17 at one day averaging time. In the optical fiber link, which is the basis of the common clock setup, the round-trip instability shows better performance for all averaging times. |
| Themenbereich der Metrologie | Zeit und Frequenz |
| Innovationscluster | Quantentechnologie |
| Geschäftsfelder | Grundlagen der Metrologie |
| Forschungsprojekt | DFG SFB 1464 TerraQ; BMBF QR.X (16KISQ017); 187/774-1 FUGG |
| Förderinformationen (1) |
Förderername: Deutsche Forschungsgemeinschaft (DFG)
Förderer ID: 0000 0001 2096 9829 Förderer ID Typ: ISNI Förderprogramm: SFB 1464 TerraQ Förderungsnummer: 434617780 |
| Förderinformationen (2) |
Förderername: Bundesministerium für Bildung und Forschung (BMBF)
Förderer ID: 0000 0001 2342 0436 Förderer ID Typ: ISNI Förderprogramm: QR.X (16KISQ017); 187/774-1 FUGG |
Zitierung
Elmaghraby, A., Krahwinkel, T., Schön, S., Kniggendorf, A.-K., Kuhl, A., Mukherjee, S., Kronjäger, J., & Piester, D. (2024). Comparing Frequency Transfer via GNSS and Fiber in a Common-clock Configuration. 55th Annual Precise Time and Time Interval Systems and Applications Meeting, Long Beach, Calif., 22-25, Januar, 2024, USA. https://doi.org/10.33012/2024.19592