Wind measurement masts are indispensable structures for acquiring data for the wind energy industry and play a central role in assessing the profitability and efficiency of wind projects. As wind turbines have been built taller in recent decades, wind measurement masts must also grow accordingly in order to analyze the wind conditions at these heights. Wind measurement masts are particularly susceptible to vibrations due to their height, slender structure, and exposed position. These vibrations can affect the stability of the mast and reduce the accuracy of the meteorological instruments. For this reason, a 150 m guyed lattice mast at the WiValdi research wind farm was instrumented with 84 uniaxial accelerometers to investigate the structural dynamic behavior of the mast. All measurement components for recording the data were attached to the mast along its entire height of 150 m to minimize the cable paths. The sensors were placed not only on the entire lattice structure itself, but also on the individual booms where the anemometers are located. By simultaneously measuring the weather data, varying environmental parameters can be directly correlated with the modal parameters. This paper aims to provide insights into the preparatory work, installation of the whole measurement chain, and analysis of the measurement data. The results are presented in the form of eigenfrequencies, damping ratios, and mode shapes as functions of varying wind speeds and ambient temperatures over a period of approx. 2 years.