| Zugriffsnummer | 46632 |
| Dokumenttyp | Konferenzartikel |
| Peer Review | unbekannt |
| Sprache | Englisch |
| Titel | Recent and future activities at Leibniz University Hannover in GNSS frequency transfer |
| Autor(in); Institution |
Krawinkel, Thomas; Leibniz Universität, Institut für Erdmessung, Hannover, GERMANY
Schön, Steffen; Leibniz Universität, Institut für Erdmessung, Hannover, GERMANY
Bauch, Andreas; 4.4, Zeit und Frequenz, PTB-Braunschweig
|
| Quelle/Jahr | 2021 Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS):(2021), 1 - 4 |
| Availability | [online only] |
| ISSN | 2327-1949 (ONLINE) ; 1075-6787 (PRINT) |
| ISBN | 978-1-6654-3935-0 (ONLINE) ; 978-1-6654-3936-7 (PoD) |
| Verlag | Piscataway, NJ: IEEE |
| Konferenzangaben | Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS), Virtual Conference, 07-17, July, 2021 |
| Freie Schlagworte | GNSS frequency transfer ; GNSS precise point positioning (PPP) ; Kalman filter ; Collaborative Research Centre “Terra Q Relativistic and Quantum based Geodesy ; PTB, Germany ; Observatoire de Paris (OP), France |
| Zusammenfassung | Within the frame of the Collaborative Research Centre "Terra Q Relativistic and Quantum based Geodesy" it is our goal to push the limits of GNSS frequency transfer (F T) to the 10-17 instability range. In the past, we focused more on short term effects. Now our refined approach of multi GNSS precise point positioning (PPP) is extended to long term analysis to achieve this goal. The performance was validated by an analyzing GNSS data simultaneously recorded at two national metrology institutes for nine consecutive days: Physikalisch Technische Bundesanstalt (PTB), Germany, Observatoire de Paris (OP), France were connected to their local realization of UTC. Our in house state of the art PPP software based on a linearized Kalman filter computes an optimal continuous solution by means of fixed interval forward backward smoothing. We used legacy ionosphere free GPS pseudorange and carrier phase observations, combined from L1(C/A) and L2(W), final IGS satellite orbit and clock products, the VMF3 troposphere model, and accounted for tidal and loading effects. The frequency instability of this link reaches the 10-16 range at an averaging time of ca.14 hours, hence it is comparable to the results documented in recent literature. We will also present results from an experiment at PTB that will start soon, where four geodetic GNSS receivers will be connected to UTC(PTB) recording data from one single antenna, i.e. common-clock zero-baseline configuration. This enables the investigation of the limits of GNSS FT with state-of the-art equipment, also regarding new GNSS signals like GPS L1C, L2C and Galileo AltBOC. Furthermore, we will analyze potential benefits of receiver clock modeling in GNSS FT. |
| Themenbereich der Metrologie | Zeit und Frequenz |
| Förderinformationen (1) |
Förderername: Deutsche Forschungsgemeinschaft (DFG)
Förderer ID: 0000 0001 2096 9829 Förderer ID Typ: ISNI Förderprogramm: SFB1464 Förderungsnummer: 434617780 |
Zitierung
Krawinkel, T., Schön, S., & Bauch, A. (2021). Recent and future activities at Leibniz University Hannover in GNSS frequency transfer. Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS), Virtual Conference, 07-17, July, 2021.