Goal. The purpose of the work is research and analysis of the accuracy of determining the coordinates of spheres during geodetic work on laser scanning.
 Methods. The study of the accuracy of measurements of the laser scanner was carried out by the method of direct measurements. During the research, the reference value of the displacement of the sphere was measured using a laser interferometer. The measurements were performed to determine the measurement errors of various measured values of the laser scanner: horizontal angle, vertical angle and distance. Processing of scans and determination of sphere coordinates was carried out in the FARO Scene Lt software complex. Processing of measurement results was carried out by methods of mathematical statistics using MS Excel.
 Scientific novelty. A study of the sensitivity of the laser scanner for determining minor displacements of reference targets, using spheres as an example, was carried out. Work with sensitivity studies in determining the coordinates of reference targets, as a component of the error in determining their coordinates, we did not find.
 Practical significance. The conducted studies will allow determining the optimal ranges of location of reference targets during scanning to ensure the highest accuracy of determining their coordinates. However, it has been experimentally proven that this method cannot be used to determine the full accuracy characteristics of a laser scanner in determining the coordinates of reference targets, since the influence of some systematic errors, such as the eccentricity of the component parts of the laser scanner, is excluded in the measurements.
 The results. According to the research results, it is possible to draw a conclusion about the most appropriate location of reference targets in the form of spheres to achieve the highest accuracy of determining their coordinates. As can be seen from the research, it is desirable to place the spheres at a distance of approximately 5 m from the NLS. At shorter distances (about 2 m), the accuracy of determining the coordinates of the spheres begins to be affected by the growing errors of measuring distances by the scanner, at large distances (from 10 m), the errors of measuring the height coordinates of the spheres increase. The results presented in the paper require further research. These studies should be performed for other types of reference targets and with the use of other models of laser scanners, which is the goal of further research by the authors.