Testing of Geodetic Laser Instruments Under Conditions of Air Turbulence

The main aim of this paper was to test the usefulness of a laser station and laser tracker to industrial metrology indoors under turbulent air conditions and to estimate the accuracy of this devices with the values declared by the manufacturer. In this work, only the analysis of the impact of air turbulence to determine the angle of laser wave propagation is discussed, and other meteorological parameters (pressure, humidity) and particles of pollutants (dust, smoke) are ignored. The influence of perturbations such as air turbulence on measurement precision by these devices is analyzed. As a result of the theoretical analysis own formula for predicting the size of the spatial variation of the laser beam has been derived. Finally, an experimental setup and method for measuring the turbulence structure coefficient Cn are described.