ABSTRACT
There are two types of instruments that measure the wind: one type evaluates wind velocity, and the other wind direction. On the ground, anemometers are used to measure wind velocity . They are installed 10 meters above the ground, and far from any obstacles (buildings, trees, etc.). The most commonly used are accumulative anemometers, made up of three or four horizontal arms, each with a hemispherical cup at the end. This device is attached to a recording system to form a wind recording instrument called an anemograph. To measure wind velocity at tropospheric altitudes, a balloon filled with hydrogen, which rises in the atmosphere, is used. From the balloon’s rising speed and its horizontal displacement over time, wind velocity can be easily calculated. Wind direction is determined using a wind vane or a windsock. Wind direction is given based on cardinal points.
