Wind speed measurement offsets

See also: Wind speed measurement offsets.

Wind speed measurements by a sonic anemometer may be biased by systematic deviation, which needs to be eliminated (e.g., for a proper assessment of tilt angles). You can get such offsets from the calibration certificate of your units, or you can assess it easily by recording the 3 wind components from the anemometer enclosed in a box with still air (zero-wind test). Any systematic deviation from zero of a wind component is a good estimate of such bias.