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The Results of GNSS Time Transfer Analysis

Transactions of IAA RAS, issue 67, 29–34 (2023)

Keywords: Global Navigation Satellite System, space vehicle, system time scale, Universal Time Coordinated, correction for the time scale offset

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Abstract

The paper considers the principles of Global Navigation Satellite Systems GPS, GLONASS, Galileo, BeiDou and Regional Navigation Satellite Systems QZSS, NavIC time scales generating and providing system time scales and Universal Time Coordinated to users. The results of GNSS time transfer analysis for the year of 2022 are presented. The results were obtained on the basis of processing data provided by the Crustal Dynamics Data Information System, Time Department of Bureau International des Poids et Mesures, measuring facilities located at the sites of Russian State Service of Time, Frequency and Determination of the Earth Rotation Parameters and China National Time Service Center. The obtained results show the following: — GPS Time — UTC offset was maintained within ±5 ns, the error of UTC broadcast to users also didn’t exceed 5 ns; — GLONASS Time — UTC offset was maintained within ±4 ns, except for some intervals. At the same time, in GLONASS there still remains the systematic error of GLONASS Time and UTC broadcast to users of about 20 ns at the interval till 12.02.2022 and 35–40 ns after 12.02.2022; — Galileo Time — UTC offset was maintained within ±5 ns; — BeiDou Time — reference time offset was maintained within ±10 ns. However, the values of BeiDou Time — UTC offsets broadcast to users were from 15 ns up to 30 ns; — in Regional Navigation Satellite Systems QZSS (Japan) and NavIC (India) the values of the offsets between system time scales and UTC were maintained within ±10 ns.

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P. P. Bogdanov, A. Y. Feoktistov. The Results of GNSS Time Transfer Analysis // Transactions of IAA RAS. — 2023. — Issue 67. — P. 29–34.

@article{bogdanov2023,
  abstract = {The paper considers the principles of Global Navigation Satellite Systems GPS, GLONASS, Galileo, BeiDou and Regional Navigation Satellite Systems QZSS, NavIC time scales generating and providing system time scales and Universal Time Coordinated to users. The results of GNSS time transfer analysis for the year of 2022 are presented.
The results were obtained on the basis of processing data provided by the Crustal Dynamics Data Information System, Time Department of Bureau International des Poids et Mesures, measuring facilities located at the sites of Russian State Service of Time, Frequency and Determination of the Earth Rotation Parameters and China National Time Service Center.
The obtained results show the following:
— GPS Time — UTC offset was maintained within ±5 ns, the error of UTC broadcast to users also didn’t exceed 5 ns;
— GLONASS Time — UTC offset was maintained within ±4 ns, except for some intervals. At the same time, in GLONASS there still remains the systematic error of GLONASS Time and UTC broadcast to users of about 20 ns at the interval till 12.02.2022 and 35–40 ns after 12.02.2022;
— Galileo Time — UTC offset was maintained within ±5 ns;
— BeiDou Time — reference time offset was maintained within ±10 ns. However, the values of BeiDou Time — UTC offsets broadcast to users were from 15 ns up to 30 ns;
— in Regional Navigation Satellite Systems QZSS (Japan) and NavIC (India) the values of the offsets between system time scales and UTC were maintained within ±10 ns.},
  author = {P.~P. Bogdanov and A.~Y. Feoktistov},
  doi = {10.32876/ApplAstron.67.29-34},
  issue = {67},
  journal = {Transactions of IAA RAS},
  keyword = {Global Navigation Satellite System, space vehicle, system time scale, Universal Time Coordinated, correction for the time scale offset},
  pages = {29--34},
  title = {The Results of GNSS Time Transfer Analysis},
  url = {http://iaaras.ru/en/library/paper/2168/},
  year = {2023}
}

TY  - JOUR
TI  - The Results of GNSS Time Transfer Analysis
AU  - Bogdanov, P. P.
AU  - Feoktistov, A. Y.
PY  - 2023
T2  - Transactions of IAA RAS
IS  - 67
SP  - 29
AB  - The paper considers the principles of Global Navigation Satellite
Systems GPS, GLONASS, Galileo, BeiDou and Regional Navigation
Satellite Systems QZSS, NavIC time scales generating and providing
system time scales and Universal Time Coordinated to users. The
results of GNSS time transfer analysis for the year of 2022 are
presented.  The results were obtained on the basis of processing data
provided by the Crustal Dynamics Data Information System, Time
Department of Bureau International des Poids et Mesures, measuring
facilities located at the sites of Russian State Service of Time,
Frequency and Determination of the Earth Rotation Parameters and
China National Time Service Center.  The obtained results show the
following:  — GPS Time — UTC offset was maintained within ±5 ns, the
error of UTC broadcast to users also didn’t exceed 5 ns;  — GLONASS
Time — UTC offset was maintained within ±4 ns, except for some
intervals. At the same time, in GLONASS there still remains the
systematic error of GLONASS Time and UTC broadcast to users of about
20 ns at the interval till 12.02.2022 and 35–40 ns after 12.02.2022;
— Galileo Time — UTC offset was maintained within ±5 ns;  — BeiDou
Time — reference time offset was maintained within ±10 ns. However,
the values of BeiDou Time — UTC offsets broadcast to users were from
15 ns up to 30 ns;  — in Regional Navigation Satellite Systems QZSS
(Japan) and NavIC (India) the values of the offsets between system
time scales and UTC were maintained within ±10 ns.
DO  - 10.32876/ApplAstron.67.29-34
UR  - http://iaaras.ru/en/library/paper/2168/
ER  -