Library · IAA RAS

Papers

GNSS Observations Processing at the Institute of Applied Astronomy

V. V. Suvorkin, I. S. Gayazov, S. L. Kurdubov

Transactions of IAA RAS, issue 61, 28–37 (2022)

Keywords: Earth rotation parameters, global navigation satellite systems, observational data processing, software, parameter determination

About the paper Full text

Abstract

from processed observations obtained using various space geodetic methods. The processing of GPS satellite observations was started in 2000 within the EOP service framework using a software package developed at the Institute. The main feature of the package was the formation of triple differences of phase measurements. This approach made it possible to use the package efficiently to determine the minimum necessary set of parameters (EOP, satellite orbit and troposphere parameters) having rather modest computing resources. However, the applied triple difference forming technique, which naturally leads to a significant increase of measurement variances, limited further increase in the accuracy of the results, despite attracting more station observations and improving the models used. Therefore, in 2011 the Institute began the development of a new software package version based on the measurements processing scheme without forming measurement differences. This observation processing scheme allows to determine the most complete set of parameters: EOPs, which are the main product within the service, satellite orbit parameters, tropospheric delay parameters and station and satellite clock correction. The article represents the main characteristics of the new software package used in the EOP service since 2014. It gives a brief overview of the used models which mostly comply with IERS recommendations. Besides, it indicates the features of the preliminary processing and measurements filtering algorithm, parameterization scheme, formation and solution of the normal equations system using the two-group least squares method, as well as the features of the time scale implementation. Using the developed package, GPS and GLONASS satellite observations from global network stations are processed daily within the framework of the EOP service. The article briefly describes the data processing modes and provides the characteristics of the main results. Comparison of the results with the data from international services shows high accuracy of the obtained EOPs, satellite orbits, troposphere parameters and clock corrections.

Citation

Text

BibTeX

RIS

V. V. Suvorkin, I. S. Gayazov, S. L. Kurdubov. GNSS Observations Processing at the Institute of Applied Astronomy // Transactions of IAA RAS. — 2022. — Issue 61. — P. 28–37.

@article{suvorkin2022,
  abstract = {from processed observations obtained using various space geodetic methods. The processing of GPS satellite observations was started in 2000 within the EOP service framework using a software package developed at the Institute. The main feature of the package was the formation of triple differences of phase measurements. This approach made it possible to use the package efficiently to determine the minimum necessary set of parameters (EOP, satellite orbit and troposphere parameters) having rather modest computing resources. However, the applied triple difference forming technique, which naturally leads to a significant increase of measurement variances, limited further increase in the accuracy of the results, despite attracting more station observations and improving the models used. Therefore, in 2011 the Institute began the development of a new software package version based on the measurements processing scheme without forming measurement differences. This observation processing scheme allows to determine the most complete set of parameters: EOPs, which are the main product within the service, satellite orbit parameters, tropospheric delay parameters and station and satellite clock correction.
The article represents the main characteristics of the new software package used in the EOP service since 2014. It gives a brief overview of the used models which mostly comply with IERS recommendations. Besides, it indicates the features of the preliminary processing and measurements filtering algorithm, parameterization scheme, formation and solution of the normal equations system using the two-group least squares method, as well as the features of the time scale implementation.
Using the developed package, GPS and GLONASS satellite observations from global network stations are processed daily within the framework of the EOP service. The article briefly describes the data processing modes and provides the characteristics of the main results. Comparison of the results with the data from international services shows high accuracy of the obtained EOPs, satellite orbits, troposphere parameters and clock corrections.},
  author = {V.~V. Suvorkin and I.~S. Gayazov and S.~L. Kurdubov},
  doi = {10.32876/ApplAstron.61.28-37},
  issue = {61},
  journal = {Transactions of IAA RAS},
  keyword = {Earth rotation parameters, global navigation satellite systems, observational data processing, software, parameter determination},
  pages = {28--37},
  title = {GNSS Observations Processing at the Institute of Applied Astronomy},
  url = {http://iaaras.ru/en/library/paper/2119/},
  year = {2022}
}

TY  - JOUR
TI  - GNSS Observations Processing at the Institute of Applied Astronomy
AU  - Suvorkin, V. V.
AU  - Gayazov, I. S.
AU  - Kurdubov, S. L.
PY  - 2022
T2  - Transactions of IAA RAS
IS  - 61
SP  - 28
AB  - from processed observations obtained using various space geodetic
methods. The processing of GPS satellite observations was started in
2000 within the EOP service framework using a software package
developed at the Institute. The main feature of the package was the
formation of triple differences of phase measurements. This approach
made it possible to use the package efficiently to determine the
minimum necessary set of parameters (EOP, satellite orbit and
troposphere parameters) having rather modest computing resources.
However, the applied triple difference forming technique, which
naturally leads to a significant increase of measurement variances,
limited further increase in the accuracy of the results, despite
attracting more station observations and improving the models used.
Therefore, in 2011 the Institute began the development of a new
software package version based on the measurements processing scheme
without forming measurement differences. This observation processing
scheme allows to determine the most complete set of parameters: EOPs,
which are the main product within the service, satellite orbit
parameters, tropospheric delay parameters and station and satellite
clock correction.  The article represents the main characteristics of
the new software package used in the EOP service since 2014. It gives
a brief overview of the used models which mostly comply with IERS
recommendations. Besides, it indicates the features of the
preliminary processing and measurements filtering algorithm,
parameterization scheme, formation and solution of the normal
equations system using the two-group least squares method, as well as
the features of the time scale implementation.  Using the developed
package, GPS and GLONASS satellite observations from global network
stations are processed daily within the framework of the EOP service.
The article briefly describes the data processing modes and provides
the characteristics of the main results. Comparison of the results
with the data from international services shows high accuracy of the
obtained EOPs, satellite orbits, troposphere parameters and clock
corrections.
DO  - 10.32876/ApplAstron.61.28-37
UR  - http://iaaras.ru/en/library/paper/2119/
ER  -