Search
• Papers

## Development of the Geocentric Coordinate System of the Republic of Uzbekistan

Transactions of IAA RAS, issue 59, 19–25 (2021)

Keywords: satellite geodetic network, GPS, ITRF2014, station velocity

### Abstract

To date, in most of the territory of the Republic of Uzbekistan with a developed infrastructure, a satellite geodetic network (SGS) has been built, based on measurements of global navigation satellite systems, including a network of reference geodetic points (RGP), a satellite geodetic network of zero class (SGS-0) and a first-class satellite geodetic network (SGS-1). Significant improvements in positioning technology, which allow determining coordinates at the centimeter level of accuracy, have set the task of modernizing the country's coordinate system for an ever-expanding user base in the field of geodesy, mapping, design, agriculture and other fields. One of the areas of research is the creation of a semi-dynamic coordinate system in which coordinates are given for a certain epoch and a model of modern tectonic movements of the Earth's surface is known. The purpose of this work is to determine the local field of horizontal velocities of movements of the Earth's crust in the region. Observation data of GPS points for the period 2005–2018 were processed using the GAMIT / GLOBK v.10.71 software package. The analysis included three main steps: estimating the coordinates and velocities of stations using daily phase measurements and standard models recommended by IERS Conventions (2010) (IERS conventions, 2010), connecting the regional network to the ITRF2014 global reference system using the Kalman filter, and determining local displacements with respect to the “stable” Eurasian plate using the rotated ITRF2014 EURA frame using the ITRF2014 angular velocity. The repeatability error of the horizontal coordinates was obtained at the level of 1.0–3.2 mm and 3.2–6.5 mm for the height. The total motion of points relative to the Eurasian plate in ITRF2014 (Altammimi, 2016) was about 27 mm / year to the northeast. Local field of vectors of horizontal velocities was constructed. The velocity values in the region are in the range from 2.3 mm to 11.0 mm per year. Moreover, the zones of maximum displacements are located along the Western Tien Shan lineament and in the Fergana Valley.

### Citation

Text
BibTeX
RIS
D. Sh. Fazilova, M. D. Makhmudov, B. T. Khalimov. Development of the Geocentric Coordinate System of the Republic of Uzbekistan // Transactions of IAA RAS. — 2021. — Issue 59. — P. 19–25. @article{fazilova2021, abstract = {To date, in most of the territory of the Republic of Uzbekistan with a developed infrastructure, a satellite geodetic network (SGS) has been built, based on measurements of global navigation satellite systems, including a network of reference geodetic points (RGP), a satellite geodetic network of zero class (SGS-0) and a first-class satellite geodetic network (SGS-1). Significant improvements in positioning technology, which allow determining coordinates at the centimeter level of accuracy, have set the task of modernizing the country's coordinate system for an ever-expanding user base in the field of geodesy, mapping, design, agriculture and other fields. One of the areas of research is the creation of a semi-dynamic coordinate system in which coordinates are given for a certain epoch and a model of modern tectonic movements of the Earth's surface is known. The purpose of this work is to determine the local field of horizontal velocities of movements of the Earth's crust in the region. Observation data of GPS points for the period 2005–2018 were processed using the GAMIT / GLOBK v.10.71 software package. The analysis included three main steps: estimating the coordinates and velocities of stations using daily phase measurements and standard models recommended by IERS Conventions (2010) (IERS conventions, 2010), connecting the regional network to the ITRF2014 global reference system using the Kalman filter, and determining local displacements with respect to the “stable” Eurasian plate using the rotated ITRF2014 EURA frame using the ITRF2014 angular velocity. The repeatability error of the horizontal coordinates was obtained at the level of 1.0–3.2 mm and 3.2–6.5 mm for the height. The total motion of points relative to the Eurasian plate in ITRF2014 (Altammimi, 2016) was about 27 mm / year to the northeast. Local field of vectors of horizontal velocities was constructed. The velocity values in the region are in the range from 2.3 mm to 11.0 mm per year. Moreover, the zones of maximum displacements are located along the Western Tien Shan lineament and in the Fergana Valley.}, author = {D.~Sh. Fazilova and M.~D. Makhmudov and B.~T. Khalimov}, doi = {10.32876/ApplAstron.59.19-25}, issue = {59}, journal = {Transactions of IAA RAS}, keyword = {satellite geodetic network, GPS, ITRF2014, station velocity}, pages = {19--25}, title = {Development of the Geocentric Coordinate System of the Republic of Uzbekistan}, url = {http://iaaras.ru/en/library/paper/2102/}, year = {2021} } TY - JOUR TI - Development of the Geocentric Coordinate System of the Republic of Uzbekistan AU - Fazilova, D. Sh. AU - Makhmudov, M. D. AU - Khalimov, B. T. PY - 2021 T2 - Transactions of IAA RAS IS - 59 SP - 19 AB - To date, in most of the territory of the Republic of Uzbekistan with a developed infrastructure, a satellite geodetic network (SGS) has been built, based on measurements of global navigation satellite systems, including a network of reference geodetic points (RGP), a satellite geodetic network of zero class (SGS-0) and a first-class satellite geodetic network (SGS-1). Significant improvements in positioning technology, which allow determining coordinates at the centimeter level of accuracy, have set the task of modernizing the country's coordinate system for an ever-expanding user base in the field of geodesy, mapping, design, agriculture and other fields. One of the areas of research is the creation of a semi-dynamic coordinate system in which coordinates are given for a certain epoch and a model of modern tectonic movements of the Earth's surface is known. The purpose of this work is to determine the local field of horizontal velocities of movements of the Earth's crust in the region. Observation data of GPS points for the period 2005–2018 were processed using the GAMIT / GLOBK v.10.71 software package. The analysis included three main steps: estimating the coordinates and velocities of stations using daily phase measurements and standard models recommended by IERS Conventions (2010) (IERS conventions, 2010), connecting the regional network to the ITRF2014 global reference system using the Kalman filter, and determining local displacements with respect to the “stable” Eurasian plate using the rotated ITRF2014 EURA frame using the ITRF2014 angular velocity. The repeatability error of the horizontal coordinates was obtained at the level of 1.0–3.2 mm and 3.2–6.5 mm for the height. The total motion of points relative to the Eurasian plate in ITRF2014 (Altammimi, 2016) was about 27 mm / year to the northeast. Local field of vectors of horizontal velocities was constructed. The velocity values in the region are in the range from 2.3 mm to 11.0 mm per year. Moreover, the zones of maximum displacements are located along the Western Tien Shan lineament and in the Fergana Valley. DO - 10.32876/ApplAstron.59.19-25 UR - http://iaaras.ru/en/library/paper/2102/ ER -