Movement of airflow, air is called wind. It is made up of many random changes in air small scale fluctuation superimposed on the rules of large scale flow of a three dimensional vector.

Ground meteorological observation in the measurement of the wind is a two-dimensional vector (horizontal motion), expressed in wind direction and speed.

Wind direction is to point to to the wind, the wind most refers to the stipulated time period appear frequency up to the wind. Artificial observation, the wind with 16 bearing method; Automatic observation, wind in degrees (°) for the unit.

Wind speed is refers to the horizontal distance per unit time of air. Wind speed in meters per second (m/s), for the unit in a decimal places. Maximum wind speed refers to the maximum in a certain period of time the 10-minute mean wind speed value. Maximum wind speed (wind) refers to a certain period of time the maximum instantaneous wind speed. The instantaneous wind speed refers to the average wind speed in three seconds.

The average wind quantity refers to the average within a prescribed time period, there are three seconds, two minutes and the average of ten minutes.

Artificial observation, measure average wind speed and wind direction at most. Equipped with a recording instrument to continuous recording of wind speed and style.

Automatic observation, the measured average average wind speed, wind direction, wind speed, maximum wind speed.

Electric got wind instruments are mainly to the anemometer, the wind data processing apparatus, an island locations automatically anemometers, light wind direction and wind cup anemometer, single wing wind-direction sensors wind speed sensor, etc.