In-depth analysis of UTC information broadcast in GNSS navigation messages

Pinat, E.; Defraigne, Pascale

doi:10.1007/s10291-022-01276-6

Cited by 2 publications

(8 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is related to the fact that at a given point in time different navigation messages may be transmitted from the satellites of a GNSS. The study [13] showed that the magnitude of u b is dependent on the GNSS. Another uncertainty contribution is u l for the link between UTC and UTC(k), which is reported in the BIPM Circular T, section 1.…”

Section: Options For a Calibrated Chain Of Measurements Between Butc ...mentioning

confidence: 99%

“…The users' receiver software can calculate the predicted offset at the moment of reception of the signal. The individual satellites of a particular GNSS might broadcast different information at the same time, but the differences are usually within a few nanoseconds [13].…”

Section: Relating a User Time Scale To Utc Via Gnssmentioning

confidence: 99%

“…The NMI/DI must develop the related uncertainty budget. The combined uncertainty comprises the term u c (see above), and a term u b associated with the broadcast value and described in [13]. It is related to the fact that at a given point in time different navigation messages may be transmitted from the satellites of a GNSS.…”

Section: Options For a Calibrated Chain Of Measurements Between Butc ...mentioning

confidence: 99%

See 2 more Smart Citations

Achieving traceability to UTC through GNSS measurements

et al. 2022

View full text Add to dashboard Cite

Coordinated Universal Time (UTC) is the international reference for time and frequency measurement, and the basis of civil timekeeping world-wide. The reception of signals from Global Navigation Satellite Systems (GNSS) as a source of time and frequency (synchronization and syntonization) has found widespread use in virtually all user sectors, including electrical power supply, telecommunications, and financial institutions. This paper summarizes the concept of metrological traceability and the practices employed in the time and frequency metrology community for achieving it. Practical steps are proposed to ensure that traceability to UTC from GNSS signal reception is available to a wide community of users, addressing different levels of required uncertainty in time and frequency offset from UTC. We suggest some practical measures that can be followed by users, and improvements to the services provided by National Metrology Institutes (NMIs).

show abstract

Section: Options For a Calibrated Chain Of Measurements Between Butc ...mentioning

confidence: 99%

Section: Relating a User Time Scale To Utc Via Gnssmentioning

confidence: 99%

Section: Options For a Calibrated Chain Of Measurements Between Butc ...mentioning

confidence: 99%

See 1 more Smart Citation

Achieving traceability to UTC through GNSS measurements

et al. 2022

View full text Add to dashboard Cite

show abstract

“…This value is generally lower than 100 ns, as the GNSS time scales are all steered to UTC in some way. It is provided as the coefficients of a polynomial of degree zero to two, depending on the constellation and on the navigation signals, as detailed in [10].…”

Section: Introductionmentioning

confidence: 99%

“…In order to provide users and GNSS providers with some information on the predictions of UTC broadcast in the GNSS navigation messages, the BIPM a posteriori estimates the differences between UTC and the broadcast predictions of UTC. This information is available in section 4 'Relations of UTC and TAI with predictions of UTC(k) disseminated by GNSS' of the Circular T [10], presently for GPS and GLONASS only, as shown in figure 1. The reported values are computed from single frequency GNSS measurements collected by receivers calibrated from different sources.…”

Section: Introductionmentioning

confidence: 99%

Monitoring of the offset between UTC and its prediction broadcast by the GNSS

Defraigne,

Pinat,

Petit

et al. 2023

Metrologia

Self Cite

View full text Add to dashboard Cite

We present a new approach to report in the Section 4 of BIPM Circular T daily values of the offset between UTC and the predictions of UTC broadcast by the GNSS, this quantity we name bUTC_GNSS. In this approach, the determination of UTC - bUTC_GNSS is based on data collected by several multi-GNSS stations in selected time laboratories worldwide. Test computations over a 7-month period from July 2022 to January 2023 show that the offset between UTC and bUTCGNSS was between 30 and 50 ns for GLONASS, between 5 and 20 ns for BeiDou, and between -5 and +5 ns for GPS and Galileo. We derive the uncertainty on the reported values, which is 4.1 ns for BeiDou and GPS, 3.7 ns for Galileo and 6.6 ns for GLONASS and show that, over the test period, the reported values of UTC-bUTC_GNSS and the solutions obtained from each multi-GNSS station are all consistent within the 1-sigma uncertainties.

show abstract

In-depth analysis of UTC information broadcast in GNSS navigation messages

Cited by 2 publications

References 6 publications

Achieving traceability to UTC through GNSS measurements

Achieving traceability to UTC through GNSS measurements

Monitoring of the offset between UTC and its prediction broadcast by the GNSS

Contact Info

Product

Resources

About