GNSS

In 2022, Galileo, the European GNSS, launched the first phase of its HAS (High Accuracy Service) initiative. With free and global corrections for clock delays and satellite orbits, Galileo HAS provides decimeter positioning accuracy without additional ground networks. This research aims to evaluate the advancements in precise positioning technologies, focusing on the Galileo High Accuracy Service (HAS). The study highlights the importance of precision positioning methods, including Standard Point Positioning (SPP), Real-Time Kinematic (RTK), and Precise Point Positioning (PPP).

The purpose of research is to identify horizontal deformation of the Ukraine territory, using only proven and suitable for geodynamic interpretation GNSS stations. The initial data are observations from 30 GNSS stations for 2017 to 2020. Methodology. The methodology includes the analysis of modern Earth's crust deformations of Ukraine. As a result, for the first time the impact of the coordinates time series created by two different methods: Precise Point Positioning (PPP) and the classical differential method, on determining deformation processes was analysed.

The purpose of this work is to prove the necessity and possibility of returning to the orthometric system of heights in Ukraine and to substantiate the ways of solving this problem. The method of achieving the goal is provided by theoretical studies of existing methods of astronomical and geodetic leveling, modern methods of forecasting neotectonic processes, GNSS accuracy and geometric leveling.

The article presents the aspects of historical development of monitoring of Tereble-Ritska hydroelectric power station (HPP), which led to the need of establishing an automated system of geodetic monitoring (ASGM) of deformations of the water pipeline and other structures. Since 2018, the system has been automated and the instrumental part continues to be expanded. Thus, as of 2022, the instrumental part of ASGM includes 3 main components, namely: linear-angular measurements with the determination of meteorological parameters, satellite GNSS measurements, and piezometric measurements.

The purpose of this work is to show the prospects and the need to continue work in Ukraine on the creation of anti-aircraft systems and astronomical geodetic leveling (a combination of astronomical and high-precision geometric leveling), using GNSS and instruments that provide accurate measurements of deviations of the temple 0.1 geodynamic landfills and man-made, which create for the construction of a height foundation for the construction and operation of extremely important facilities.

The emergence of satellite observations was marked by their widespread use to determine the velocities and direction of horizontal motions of lithosphere plates (modern kinematics of lithosphere plates), which allowed to research the deformation processes at the global and regional levels. Today, permanent GNSS stations cover a large part of the land area. Since many of these stations have accumulated a large amount of daily observation over 20 years, it is possible to trace the deformation processes of certain areas.

The purpose of the research. Elaboration of practical recommendations concerning creation of a geodesic markup construction base with GNSS technologies, including Real Time Networks (RTN) methods. Methodology. To investigate the accuracy of the recommended solutions, different kinds of research were made, including a practical one. It was conducted on the construction site by marking the axis from two base lines, previously indicated by a GNSS receiver in such a way, so they coincided with the x and y axes of the general site’s plan.

Purpose: This study assumed: experimental determination of the accuracy of measuring relatively short distances, typical for performing survey, planning and marking engineering geodesy works using a dual frequency GNSS receiver under different conditions of observation, and using RTN-technology on mountain area of the Precarpathian region. Methodology: To investigate the accuracy of measuring short distances, seven experiments that differed in mutual position of permanent stations and physical geographical conditions of outside conditions were performed.

The aim. The aims of this study were: to calculate the parameters of horizontal deformation of Earth’s crust of Europe on the basis of annual velocity vectors of the horizontal displacement of permanent GNSS - stations, calculated according to the GNSS - observations during 2000 – 2010; to study the distribution and changes of horizontal deformations and earth's crust in Europe changes from 2000 to 2010 and to establish their relationship with the tectonic structure and the manifestation of seismic activity in the actual region. Methods.

Purpose. The purpose of this study is to determine the horizontal movements of the earth surface in the vicinity of the main waterworks Dniester HPPS and the surrounding area using technologies of satellite monitoring by global navigation satellite system (GNSS). The territory is under the influence of anthropogenic impact of HPPS cyclical operating mode. To assess the accuracy of horizontal displacements of HPPS water intake at points with limited reception of satellite signals using compliant data of satellite and linear-angular measurements.