In the graduation thesis we present the results of the examination of the quality and operation of the instrument JAVAD TRIUMPH-LS in RTK survey. The test was done according to the instructions of standard ISO 17123-8 at two worksites in different weather conditions and with different ways of installing the instrument on the point. In the first case we have an instrument erected at the bar, but in the second case we use forced centering instrument placed on a pillar. With the test we confirmed the quality of the operation of the instrument JAVAD TRIUMPH-LS, as is provided by the manufacturer, although, it should be noted that in the second case, when we put instrument on the pillars, we get much better repeatability of the results of the determination of coordinates. After multiple test made according to standard ISO 17123-8, we can say, that the instrument JAVAD TRIUMPH-LS, even when we using internal antennas and when we exclude inclinoimeter, which take into account corrections resulting from the inclination, obtain the results as given by the manufacturers. The second part of the graduation thesis was about the reproducibility determination of the coordinates of one point, for the case, when we put the instrument closer to the ground. In this situation, we placed the foil around, which may constitute a source of multipath. In this case we did not find significant differences in determining the coordinates and may, based on the results conclude, that the antenna height does not affect the quality of the final determination of coordinates of points.
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