In this thesis, we test the performance of a tilt compensator in GNSS instruments that allow high-quality position determination without the need to level the instrument. We wanted to find out whether the use of a compensator affects the accuracy of the RTK measurement and whether it can help to improve the coordinate determination. Based on the research questions, two experiments were carried out in which the coordinates determined from RTK measurements with and without the use of tilt compensation were compared with reference values, and the resulting differences were analysed. In the first experiment, we found that tilt compensation can affect the results of the RTK survey. The second experiment showed that for field RTK measurements, tilt compensation can help to improve the results. The analysis of the results did not lead to a unique conclusion as the results depended on the instrument that was used. Despite these findings, the use of tilt compensation makes sense when we want to determine the coordinates of a point over which we cannot centre the instrument, or when the tilt allows us to have better conditions for taking the measurement.
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