Vaisala WAT12 - Manual (Page 14)

User's Guide ________________________________________________________
12 _____________________________________________________M210309EN-A
In general, any object of height (h) will not remarkably
disturb wind measurement at a minimum distance of 10
× h.
There should be at least 150 m open area in all directions
from the mast. Refer to Figure 2 on page 11.
0204-041
Figure 3 Recommended Mast Length on Top of a
Building
The recommended minimum length (marked with the letter
h in Figure 3 above) for the mast that is installed on top of a
building is 1.5 times the height of the building (H). When
the diagonal (W) is less than the height (H), the minimum
length of the mast is 1.5
× W.