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VLBI Intensive Sessions Scheduling Optimization to Determine the Universal Time Correction

Transactions of IAA RAS, issue 51, 73—81 (2019)

Keywords: VLBI intensive session scheduling, Universal Time сorrection

Abstract

VLBI intensive measurements provide significant contribution to the Universal Time correction (ΔUT1) computation. Since the variation of this parameter is pretty rapid and the parameter is very important for the accuracy of Global Navigation Satellite Systems observations, it is necessary to provide regular and accurate computations of the Universal Time сorrection ΔUT1. Used the algorithms of VLBI sessions scheduling, such as covariance matrix optimization and sky covering are described in the present paper. Some improvements (namely the genetic algorithm and the source replacement) of the covariance matrix optimization algorithm are proposed for the intensive sessions case. Simulation of the VLBI intensive sessions for the Universal Time correction (ΔUT1) computation was carried out and the standard deviation of ΔUT1 estimation was computed for each algorithm in case of the Quasar VLBI Network.

Citation

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RIS

A. A. Kudelkin, S. L. Kurdubov. VLBI Intensive Sessions Scheduling Optimization to Determine the Universal Time Correction // Transactions of IAA RAS. — 2019. — Issue 51. — P. 73—81.

@article{kudelkin2019,
  abstract = {VLBI intensive measurements provide significant contribution to the Universal Time correction (ΔUT1) computation. Since the variation of this parameter is pretty rapid and the parameter is very important for the accuracy of Global Navigation Satellite Systems observations, it is necessary to provide regular and accurate computations of the Universal Time сorrection ΔUT1.
Used the algorithms of VLBI sessions scheduling, such as covariance matrix optimization and sky covering are described in the present paper. Some improvements (namely the genetic algorithm and the source replacement) of the covariance matrix optimization algorithm are proposed for the intensive sessions case. Simulation of the VLBI intensive sessions for the Universal Time correction (ΔUT1) computation was carried out and the standard deviation of ΔUT1 estimation was computed for each algorithm in case of the Quasar VLBI Network.},
  author = {A.~A. Kudelkin and S.~L. Kurdubov},
  doi = {10.32876/ApplAstron.51.73-81},
  issue = {51},
  journal = {Transactions of IAA RAS},
  keyword = {VLBI intensive session scheduling, Universal Time сorrection},
  pages = {73—81},
  title = {VLBI Intensive Sessions Scheduling Optimization to Determine the Universal Time Correction},
  url = {http://iaaras.ru/en/library/paper/2013/},
  year = {2019}
}

TY  - JOUR
TI  - VLBI Intensive Sessions Scheduling Optimization to Determine the Universal Time Correction
AU  - Kudelkin, A. A.
AU  - Kurdubov, S. L.
PY  - 2019
T2  - Transactions of IAA RAS
IS  - 51
SP  - 73
AB  - VLBI intensive measurements provide significant contribution to the
Universal Time correction (ΔUT1) computation. Since the variation of
this parameter is pretty rapid and the parameter is very important
for the accuracy of Global Navigation Satellite Systems observations,
it is necessary to provide regular and accurate computations of the
Universal Time сorrection ΔUT1.  Used the algorithms of VLBI sessions
scheduling, such as covariance matrix optimization and sky covering
are described in the present paper. Some improvements (namely the
genetic algorithm and the source replacement) of the covariance
matrix optimization algorithm are proposed for the intensive sessions
case. Simulation of the VLBI intensive sessions for the Universal
Time correction (ΔUT1) computation was carried out and the standard
deviation of ΔUT1 estimation was computed for each algorithm in case
of the Quasar VLBI Network.
DO  - 10.32876/ApplAstron.51.73-81
UR  - http://iaaras.ru/en/library/paper/2013/
ER  -