BIPM calibration scheme for UTC time links — BIPM pilot expermiment to strenghen Asia-Europe very long baselines

Jiang, Z.; Petit, Gérard; Arias, F.; Lewandowski, W.; Tisserand, L.

doi:10.1109/fcs.2011.5977734

Cited by 15 publications

(17 citation statements)

References 7 publications

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“…Here, the least squares search method of LAMBDA can be used to obtain the fixed solution for the DD ambiguities (Δ∇N ij f ix ) [18], as shown in Equation (3).…”

Section: Double-differenced Ambiguity Resolution and Fixed Sd Ambigui...mentioning

confidence: 99%

Real‐time and dynamic time transfer method based on double‐differenced real‐time kinematic mode

Zhang

et al. 2021

IET Radar Sonar & Navi

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In this study, a real-time and dynamic time transfer method based on double-differenced (DD) real-time kinematic (RTK) mode is proposed. First, the method forms the DD observations of Global Navigation Satellite System (GNSS) to fix the DD ambiguity, and then, all of the fixed single-differenced (SD) ambiguities are recovered while defining the SD ambiguity datum; finally, the method uses the SD observations to realise the time transfer by using the fixed SD ambiguities. Five different baseline links were used for the validations. The results demonstrated that the DD-RTK method can be used for both kinematic positioning and precise time transfers, and it provides for much better accuracy and stability than the un-differenced precise point positioning method because it is operated by the broadcast ephemeris, which is more convenient for real-time applications. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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“…Here, the least squares search method of LAMBDA can be used to obtain the fixed solution for the DD ambiguities (Δ∇N ij f ix ) [18], as shown in Equation (3).…”

Section: Double-differenced Ambiguity Resolution and Fixed Sd Ambigui...mentioning

confidence: 99%

Real‐time and dynamic time transfer method based on double‐differenced real‐time kinematic mode

Zhang

et al. 2021

IET Radar Sonar & Navi

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“…Compared with the former two techniques, the link calibration based on GPS shows the characteristics of portable and low cost. It is also well adapted to the current structure of time links evaluated by the Bureau International des Poids et Mesures (BIPM) in the realisation of UTC [2, 3].…”

Section: Introductionmentioning

confidence: 99%

“…During the recent years, time link calibration based on GPS has been extensively studied among the time laboratories. The calibration set‐up and the procedures have been discussed in depth [2, 3]. The approach of the calibration approach can either be operated in GPS common view (CV) or all in view (AV) mode with the code observation, which only provides the nanosecond accuracy level almost limited to the observations [3–6].…”

Section: Introductionmentioning

confidence: 99%

“…Since the GPS carrier phase (CP) is more precise than the code observation, the CP is utilised in order to improve the calibration uncertainty recently [7–11]. However, the previous researches using CP technique were mainly focused on the specific implementation procedures in the process of time link calibration, but the exact mechanism of how GPS CP approach works in the case of time link calibration data processing remains still unclear [2, 3, 11].…”

Section: Introductionmentioning

confidence: 99%

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Study of time link calibration based on GPS carrier phase observation

Zhang

Gao

et al. 2018

IET Radar, Sonar & Navigation

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“…However for improving the uB, the link calibration is needed. The conventional receiver-calibration suffers from the higher uB while the link calibration [Esteban et al, 2011;Jiang et al, 2011Jiang et al, , 2012 exhibits the potential benefits to reduce the uB which is the dominant part in the uncertainty of UTC-UTC(K) issued in BIPM (Bureau International des Poids et Mesures) Circular T.…”

Section: Introductionmentioning

confidence: 99%

Time and frequency transfer system using GNSS receiver

2014

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Global Positioning System (GPS) time and frequency transfer is one of the most useful ways for the comparison of remote clocks, and the comparison results are very important for the calculation of International Atomic Time and UTC (Coordinated Universal Time). For the timing laboratories, it is necessary to calibrate and periodically evaluate their time transfer system to ensure the accuracy and long-term stability of their time and frequency comparison results. Once the calibration is achieved, it can be used as a standard for traceable time and frequency measurements. In this paper, we demonstrate Global Navigation Satellite System receiver calibration campaign between the National Time and Frequency Standard Laboratory of Telecommunication Laboratories in Taiwan and the Measurement Standards Laboratory in New Zealand. Two calibration strategies, receiver calibration and the link calibration, are adopted in this work. The receiver calibration is used for evaluating the performance of the proposed system in domestic traceability network in Taiwan. The link calibration is used for minimizing the total uncertainty budget in calculating UTC. Experimental results indicate that the expanded time and frequency uncertainty of the proposed system (with a coverage factor of k = 2) are less than 25 ns and 1.1 × 10 À13 , respectively, after 1 day of averaging. The accuracy of GPS time link is reported to be better than 2 ns in long-baseline link (10,000 km) in Asia-Pacific Zone.

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BIPM calibration scheme for UTC time links — BIPM pilot expermiment to strenghen Asia-Europe very long baselines

Cited by 15 publications

References 7 publications

Real‐time and dynamic time transfer method based on double‐differenced real‐time kinematic mode

Real‐time and dynamic time transfer method based on double‐differenced real‐time kinematic mode

Study of time link calibration based on GPS carrier phase observation

Time and frequency transfer system using GNSS receiver

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