GNSS observations

The purpose of this work is to build 3D models of components of zenith tropospheric delay (ZTD) according to the surface measurements of meteorological values obtained at 100 points, which is almost evenly distributed throughout Ukraine. Method. Saastamoinen formulas calculated dry and wet components of the zenith tropospheric delay. According to the obtained results, the fields of dry and wet components of tropospheric delay were compiled, the fields of their change were constructed using a different number of studied points.

The main goal of our research is to show the need to use modern methods of processing GNSS observations time series by non-classical error theory of measurements (NETM), which is characterized by large sample sizes n > 500. The errors of high-precision observations, for the most part, cannot be represented by the classical law of Gaussian distribution. With the increase in sample size, the empirical error distribution will increasingly deviate from the classical Gaussian error theory of measurements (CETM).

Aim. This article analyses the modern usage of GNSS data for solving problems in geodynamics and examines the level of data suitability for estimation of regional motion and deformations of the Earth’s surface according to their accuracy and the overall time of observation during which the representative estimation results can be provided. Method.

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.

The correlation between the measurement data of geodetic coordinates and data that describe the local state of the earth’s surface and near-earth space was researched. To identify the possible connection between the oscillating components of geodetic coordinates integrals calculated autocorrelation and cross correlation functions of integrals for a given period of time. Graphics autocorrelation function and investigated integrals are presented.

Purpose. Today various methods of automatic deformation’s monitoring of engineering buildings of hydroelectric power plants (HPPs) are widely used. Namely, the method of GNSS measurements. Like all geodetic methods to study deformations, the method of GNSS measurements has several advantages and disadvantages. Since hydro power plants in most cases are located in complex terrain, it leads to a limited passing signal to receivers, which worsens the results. In addition to these conditions, simultaneously measured by three or more receivers, vectors are burdened with systematic errors.