Campbell CR850, Operator'S Manual

Page: 192 / 566

Section 7. Installation
192
Figure 58: Mean wind-vector graph
where for polar sensors:
or, in the case of orthogonal sensors:
Resultant mean wind direction, Θ u:
Standard deviation of wind direction, σ ( Θ u), using Campbell Scientific
algorithm:
The algorithm for σ ( Θ u) is developed by noting ( FIGURE. Standard Deviation of
Direction
(p. 193)
) that
where