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Synchronization of Station Clocks by Observing the Crab Nebula Pulsar

S. Kurdubov, D. Marshalov, A. Melnikov, I. Bezrukov, E. Nosov, I. Gayazov

Transactions of IAA RAS, issue 62, 15–20 (2022)

Keywords: pulsar, PSR B0531 + 21, giant pulses, clock synchronization, dispersion compensation

Abstract

This work is devoted to the study of the possibility of high-precision synchronization of remote clocks based on VLBI observations of giant pulses (GR) from a pulsar in the Crab Nebula. Based on the analysis of past observations of PSR B0531+21, the possibility of using these pulses for solving the synchronization problem is theoretically shown. The paper proposes an algorithm for observing and processing PSR B0531+21 pulsar giant pulses, which provides high-precision synchronization of remote observation sites. A special observation session was planned and carried out on 5 radio telescopes of the “Quasar” VLBI network in the L, S and X frequency bands. Observation data processing was performed in accordance with the proposed algorithm. A coherent elimination of the influence of the interstellar medium was carried out with a refinement of its dispersion parameter. A search for giant pulses was performed in the mode of processing records from individual radio telescopes and the subsequent joint determination of the time difference of pulses arrival at radio telescopes by the cross-correlation method. The proposed synchronization technique was successfully tested. As a result of processing the observational data, giant pulses were detected in the L and S frequency bands. The average number of detected pulses on the RT-32 radio telescopes in L band was 36 pulses per minute and 12 pulses per minute on RT-13 radio telescopes in S band, respectively. Estimates of the interstellar dispersion are obtained from powerful pulses. As a result of cross-correlation of signals of individual pulses from different radio telescopes, the discrepancies of the station clocks were calculated. The accuracy of the proposed clock synchronization method is estimated. The fundamental possibility of synchronizing clocks by observing giant pulses from a pulsar has been shown experimentally.

Citation

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S. Kurdubov, D. Marshalov, A. Melnikov, I. Bezrukov, E. Nosov, I. Gayazov. Synchronization of Station Clocks by Observing the Crab Nebula Pulsar // Transactions of IAA RAS. — 2022. — Issue 62. — P. 15–20.

@article{kurdubov2022,
  abstract = {This work is devoted to the study of the possibility of high-precision synchronization of remote clocks based on VLBI observations of giant pulses (GR) from a pulsar in the Crab Nebula. Based on the analysis of past observations of PSR B0531+21, the possibility of using these pulses for solving the synchronization problem is theoretically shown.
The paper proposes an algorithm for observing and processing PSR B0531+21 pulsar giant pulses, which provides high-precision synchronization of remote observation sites. A special observation session was planned and carried out on 5 radio telescopes of the “Quasar” VLBI network in the L, S and X frequency bands. Observation data processing was performed in accordance with the proposed algorithm. A coherent elimination of the influence of the interstellar medium was carried out with a refinement of its dispersion parameter. A search for giant pulses was performed in the mode of processing records from individual radio telescopes and the subsequent joint determination of the time difference of pulses arrival at radio telescopes by the cross-correlation method.
The proposed synchronization technique was successfully tested. As a result of processing the observational data, giant pulses were detected in the L and S frequency bands. The average number of detected pulses on the RT-32 radio telescopes in L band was 36 pulses per minute and 12 pulses per minute on RT-13 radio telescopes in S band, respectively. Estimates of the interstellar dispersion are obtained from powerful pulses. As a result of cross-correlation of signals of individual pulses from different radio telescopes, the discrepancies of the station clocks were calculated. The accuracy of the proposed clock synchronization method is estimated. The fundamental possibility of synchronizing clocks by observing giant pulses from a pulsar has been shown experimentally.},
  author = {S. Kurdubov and D. Marshalov and A. Melnikov and I. Bezrukov and E. Nosov and I. Gayazov},
  doi = {10.32876/ApplAstron.62.15-20},
  issue = {62},
  journal = {Transactions of IAA RAS},
  keyword = {pulsar, PSR B0531 + 21, giant pulses, clock synchronization, dispersion compensation},
  pages = {15--20},
  title = {Synchronization of Station Clocks by Observing the Crab Nebula Pulsar},
  url = {http://iaaras.ru/en/library/paper/2128/},
  year = {2022}
}

TY  - JOUR
TI  - Synchronization of Station Clocks by Observing the Crab Nebula Pulsar
AU  - Kurdubov, S.
AU  - Marshalov, D.
AU  - Melnikov, A.
AU  - Bezrukov, I.
AU  - Nosov, E.
AU  - Gayazov, I.
PY  - 2022
T2  - Transactions of IAA RAS
IS  - 62
SP  - 15
AB  - This work is devoted to the study of the possibility of high-
precision synchronization of remote clocks based on VLBI observations
of giant pulses (GR) from a pulsar in the Crab Nebula. Based on the
analysis of past observations of PSR B0531+21, the possibility of
using these pulses for solving the synchronization problem is
theoretically shown.  The paper proposes an algorithm for observing
and processing PSR B0531+21 pulsar giant pulses, which provides high-
precision synchronization of remote observation sites. A special
observation session was planned and carried out on 5 radio telescopes
of the “Quasar” VLBI network in the L, S and X frequency bands.
Observation data processing was performed in accordance with the
proposed algorithm. A coherent elimination of the influence of the
interstellar medium was carried out with a refinement of its
dispersion parameter. A search for giant pulses was performed in the
mode of processing records from individual radio telescopes and the
subsequent joint determination of the time difference of pulses
arrival at radio telescopes by the cross-correlation method.  The
proposed synchronization technique was successfully tested. As a
result of processing the observational data, giant pulses were
detected in the L and S frequency bands. The average number of
detected pulses on the RT-32 radio telescopes in L band was 36 pulses
per minute and 12 pulses per minute on RT-13 radio telescopes in S
band, respectively. Estimates of the interstellar dispersion are
obtained from powerful pulses. As a result of cross-correlation of
signals of individual pulses from different radio telescopes, the
discrepancies of the station clocks were calculated. The accuracy of
the proposed clock synchronization method is estimated. The
fundamental possibility of synchronizing clocks by observing giant
pulses from a pulsar has been shown experimentally.
DO  - 10.32876/ApplAstron.62.15-20
UR  - http://iaaras.ru/en/library/paper/2128/
ER  -