The ultrasonic anemometer is a great tool to catch wind gust. The sampling rate is 1Hz which makes this device to be a proper supplement for DynaRoot or DynaTree users or any other cases when measuring wind gusts is essential.
An instrument for measuring wind velocity at or near the tree to be evaluated. The closer to the better, but, depending on wind velocity DynaRoot may provide reliable data even with measurements taken several kilometres/miles away. The anemometer provides wind velocity data of sufficient frequency, Ideally the anemometer should be clear of buildings or other objects that may obstruct the wind, at a height of at least 10m.