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Use of GLONASS for International Time Keeping

W. Lewandowski, F. Arias, J. Nawrocki, P. Nogas'

Transactions of IAA RAS, issue 20, 358–366 (2009)

Keywords: radiointerferometry with very long baselines, GLONASS, GPS, international time metrology, P-code signal, calibration of time receivers, uncertainty, P-code links, C/A-code links, accuracy, time links, TAI calculation, GLONASS time (GLNT)

Abstract

Although not finished and not so widely known as the GPS, the Russian Global Navigation Satellite System (GLONASS) provides interesting opportunities for international time metrology. Its P-code signal shows an outstanding performance. It especially allows calibration of GLONASS time receivers with an uncertainty below 1 ns. We compared the GLONASS and GPS links measured with the same 3S GPS/GLONASS receivers. For short- and middle-distance time transfers, the GLONASS P-code links show an accuracy of about 1 ns, which is better than that of the GPS C/A-code links. For very long distance links, the accuracy of the P-code links is about 3 ns, which is similar to that of the GPS C/A-code links. This is probably because of the lower accuracy of the IGS GLONASS precise orbit data due to the limited number of world-wide tracking points. It is proposed that GLONASS time links be calculated monthly, initially as back-up links for TAI calculation, and later as possible official time links. We discuss also the behavior of GLONASS time (GLNT)

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W. Lewandowski, F. Arias, J. Nawrocki, P. Nogas'. Use of GLONASS for International Time Keeping // Transactions of IAA RAS. — 2009. — Issue 20. — P. 358–366.

@article{lewandowski2009,
  abstract = {Although not finished and not so widely known as the GPS, the Russian Global Navigation Satellite System (GLONASS) provides interesting opportunities for international time metrology. Its P-code signal shows an outstanding performance. It especially allows calibration of GLONASS time receivers with an uncertainty below 1 ns. We compared the GLONASS and GPS links measured with the same 3S GPS/GLONASS receivers. For short- and middle-distance time transfers, the GLONASS P-code links show an accuracy of about 1 ns, which is better than that of the GPS C/A-code links. For very long distance links, the accuracy of the P-code links is about 3 ns, which is similar to that of the GPS C/A-code links. This is probably because of the lower accuracy of the IGS GLONASS precise orbit data due to the limited number of world-wide tracking points. It is proposed that GLONASS time links be calculated monthly, initially as back-up links for TAI calculation, and later as possible official time links. We discuss also the behavior of GLONASS time (GLNT)},
  author = {W. Lewandowski and F. Arias and J. Nawrocki and P. Nogas'},
  issue = {20},
  journal = {Transactions of IAA RAS},
  keyword = {radiointerferometry with very long baselines, GLONASS, GPS, international time metrology, P-code signal, calibration of time receivers, uncertainty, P-code links, C/A-code links, accuracy, time links, TAI calculation, GLONASS time (GLNT)},
  pages = {358--366},
  title = {Use of GLONASS for International Time Keeping},
  url = {http://iaaras.ru/en/library/paper/652/},
  year = {2009}
}

TY  - JOUR
TI  - Use of GLONASS for International Time Keeping
AU  - Lewandowski, W.
AU  - Arias, F.
AU  - Nawrocki, J.
AU  - Nogas', P.
PY  - 2009
T2  - Transactions of IAA RAS
IS  - 20
SP  - 358
AB  - Although not finished and not so widely known as the GPS, the Russian
Global Navigation Satellite System (GLONASS) provides interesting
opportunities for international time metrology. Its P-code signal
shows an outstanding performance. It especially allows calibration of
GLONASS time receivers with an uncertainty below 1 ns. We compared
the GLONASS and GPS links measured with the same 3S GPS/GLONASS
receivers. For short- and middle-distance time transfers, the GLONASS
P-code links show an accuracy of about 1 ns, which is better than
that of the GPS C/A-code links. For very long distance links, the
accuracy of the P-code links is about 3 ns, which is similar to that
of the GPS C/A-code links. This is probably because of the lower
accuracy of the IGS GLONASS precise orbit data due to the limited
number of world-wide tracking points. It is proposed that GLONASS
time links be calculated monthly, initially as back-up links for TAI
calculation, and later as possible official time links. We discuss
also the behavior of GLONASS time (GLNT)
UR  - http://iaaras.ru/en/library/paper/652/
ER  -