CR1000 Manual - Campbell Scientific

Section 7. Installation
Figure 58: Mean wind-vector graph
where for polar sensors:
or, in the case of orthogonal sensors:
Resultant mean wind direction, Θu:
Standard deviation of wind direction, σ (Θu), using Campbell Scientific
algorithm:
The algorithm for σ (Θu) is developed by noting (FIGURE. Standard Deviation of
Direction (p. 192) ) that
where
191