Satellite navigation systems have wide application in traffic and many other contemporary activities, while also being increasingly used for scientific research purposes. In maritime traffic, satellite navigation methods are basic means of positioning and navigation. The effect of atmospheric electricity to the dispersion of position derived from satellite navigation systems is well known and it is important in maritime activities where high positional accuracy is required. In satellite technology, the value of Total Electron Content (TEC) is often used as a measure of atmospheric electricity. It is a number of free electrons contained within column of 1m2 cross section between satellite and surface of the Earth. Scientific research of the coupling between lithosphere dynamics and electrical properties of the atmosphere is at its early developing stage. Specifically, the influence of volcanic activity to the atmospheric electricity in not well understood yet. Because of that, the effects of volcanic activity to the positional accuracy of satellite derived position are not known. The goal of dissertation is by implementing statistical approach to analyze coupling between volcanic activity and dispersion of position derived from satellite navigation systems, to determine qualitative and quantitative relationship of those objects of research. To that end, the activity of total of 6 volcanoes are analyzed across period between 2000 and 2021 in a context of positional accuracy in their vicinity. The volcanic activity is represented by spectral radiance measured from satellites. The dispersion of position is determined from the data of GNSS (Global Navigation Satellite System) reference stations, while as a method of calculating position, the single frequency, single point positioning is chosen, with modelled ionospheric correction but without using differential services or other means or methods of improving positional accuracy. The positional accuracy is analyzed through 24-hours arithmetic mean of error, mean squared error and standard deviation of error of calculated position in vicinity of volcano. As a possible explanatory parameter for derived results, 24-hour arithmetic mean and standard deviation of total electron content above volcanic area is analyzed. The research determined the user positional statistical balance in the function of volcanic activity and the corresponding distribution of TEC values. The results of comparison of positional accuracy across used statistical indicators during active and inactive volcanic periods show important quantitative differences among different volcanoes, but also pretty consistent qualitative pattern — the improvement of positional accuracy near active volcanoes for 5 or 6 of 6 analyzed volcanoes, depending on statistical indicator used. The volcanic aerosol injected into stratospheric region is hypothesized to be a basic cause that limits the amplitude of total electron content within ionosphere above active volcanic area, consequently reducing single frequency positional errors from GPS (Global Positioning System). Results also show decreasing of positional accuracy by increasing user distance from active volcano and also reducing accuracy with decreased volcanic activity levels. The specifics of statistical modelling are derived from highly stohasic nature of results, and such results also point to the basic matter of fact — volcanic activity is found to be a secondary factor that effects accuracy of position derived from satellite navigation systems. It only comes after the primary forcing effects on the ionosphere and positional accuracy, such as solar and cosmic rays' activity. It is also shown that those primary forcing effects represent important factor that makes the analyzing of volcanic activity driven effects difficult and thus, reducing their influence to the analysis comes as a great challenge. Final discussion of results has shown the need to expand the future research efforts to the effects of volcanic activity on other GNSS systems and in particular on more accurate methods of positioning using satellite navigation systems.