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Comparison of Onboard Frequency Standards Performance Based on High-Precision Data from the International GNSS Service

A. V. Saltsberg, K. G. Shupen, O. E. Nechaeva

Transactions of IAA RAS, issue 68, 26–35 (2024)

Keywords: GNSS, time-frequency support, atomic frequency standards, satellite time scale, Allan deviation, Hadamar deviation, time deviation, prediction accuracy

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Abstract

The accuracy of the user navigation and time support is largely determined by the properties of the atomic frequency standard operating on board the GNSS satellite. Onboard atomic frequency standards characteristics analyzed during their ground-based testing and flight operation is necessary to operationally account for changes in these characteristics due to aging or the external factors influence, since it allows to increase the accuracy of time synchronization in GNSS. The purpose of this work is to analyze different types of GNSS onboard frequency standards characteristics and to evaluate the potential satellite time clock offset prediction accuracy for various GNSS based on real data. The basis of the methodological approach used to assess the performance characteristics is the analysis of the atomic frequency standard stochastic behavior using Allan, Hadamard deviations or their modified varieties and time deviation. The paper presents the estimates of the characteristics of onboard quantum frequency standards for 2022 based on high-precision a posteriori data. They are compared with the previously obtained results for 2020. The interpretation of the results obtained in terms of analyzing the noise composition inherent in different types of atomic frequency standards is given. The estimates of the potential satellite time clock offset prediction accuracy are obtained. It is shown that a comparative analysis of the performance of atomic frequency standards used in modern GNSS makes it possible to best monitor and account for the behavior of each onboard frequency standard during operation.

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A. V. Saltsberg, K. G. Shupen, O. E. Nechaeva. Comparison of Onboard Frequency Standards Performance Based on High-Precision Data from the International GNSS Service // Transactions of IAA RAS. — 2024. — Issue 68. — P. 26–35.

@article{saltsberg2024,
  abstract = {The accuracy of the user navigation and time support is largely determined by the properties of the atomic frequency standard operating on board the GNSS satellite. Onboard atomic frequency standards characteristics analyzed during their ground-based testing and flight operation is necessary to operationally account for changes in these characteristics due to aging or the external factors influence, since it allows to increase the accuracy of time synchronization in GNSS. The purpose of this work is to analyze different types of GNSS onboard frequency standards characteristics and to evaluate the potential satellite time clock offset prediction accuracy for various GNSS based on real data.
The basis of the methodological approach used to assess the performance characteristics is the analysis of the atomic frequency standard stochastic behavior using Allan, Hadamard deviations or their modified varieties and time deviation. 
The paper presents the estimates of the characteristics of onboard quantum frequency standards for 2022 based on high-precision a posteriori data. They are compared with the previously obtained results for 2020. The interpretation of the results obtained in terms of analyzing the noise composition inherent in different types of atomic frequency standards is given. The estimates of the potential satellite time clock offset prediction accuracy are obtained. It is shown that a comparative analysis of the performance of atomic frequency standards used in modern GNSS makes it possible to best monitor and account for the behavior of each onboard frequency standard during operation.},
  author = {A.~V. Saltsberg and K.~G. Shupen and O.~E. Nechaeva},
  doi = {10.32876/ApplAstron.68.26-35},
  issue = {68},
  journal = {Transactions of IAA RAS},
  keyword = {GNSS, time-frequency support, atomic frequency standards, satellite time scale, Allan deviation, Hadamar deviation, time deviation, prediction accuracy},
  pages = {26--35},
  title = {Comparison of Onboard Frequency Standards Performance Based on High-Precision Data from the International GNSS Service},
  url = {http://iaaras.ru/en/library/paper/2175/},
  year = {2024}
}

TY  - JOUR
TI  - Comparison of Onboard Frequency Standards Performance Based on High-Precision Data from the International GNSS Service
AU  - Saltsberg, A. V.
AU  - Shupen, K. G.
AU  - Nechaeva, O. E.
PY  - 2024
T2  - Transactions of IAA RAS
IS  - 68
SP  - 26
AB  - The accuracy of the user navigation and time support is largely
determined by the properties of the atomic frequency standard
operating on board the GNSS satellite. Onboard atomic frequency
standards characteristics analyzed during their ground-based testing
and flight operation is necessary to operationally account for
changes in these characteristics due to aging or the external factors
influence, since it allows to increase the accuracy of time
synchronization in GNSS. The purpose of this work is to analyze
different types of GNSS onboard frequency standards characteristics
and to evaluate the potential satellite time clock offset prediction
accuracy for various GNSS based on real data.  The basis of the
methodological approach used to assess the performance
characteristics is the analysis of the atomic frequency standard
stochastic behavior using Allan, Hadamard deviations or their
modified varieties and time deviation.   The paper presents the
estimates of the characteristics of onboard quantum frequency
standards for 2022 based on high-precision a posteriori data. They
are compared with the previously obtained results for 2020. The
interpretation of the results obtained in terms of analyzing the
noise composition inherent in different types of atomic frequency
standards is given. The estimates of the potential satellite time
clock offset prediction accuracy are obtained. It is shown that a
comparative analysis of the performance of atomic frequency standards
used in modern GNSS makes it possible to best monitor and account for
the behavior of each onboard frequency standard during operation.
DO  - 10.32876/ApplAstron.68.26-35
UR  - http://iaaras.ru/en/library/paper/2175/
ER  -