Vaisala AWS330 - Manual (Page 35)

Chapter 4 _______________________________________________________________ Installation
VAISALA _______________________________________________________________________ 33
Selecting Location
Ambient Measurements
Finding a suitable site for the weather station is important for getting
representative ambient measurements. The site should represent the
general area of interest. For further information, refer to the local
recommendations and WMO Guide to Meteorological Instruments and
Methods of Observation, WMO-No. 8.
Allow sufficient clearance especially for the wind sensors. The mast
should not be located next to a building or any other object that might
affect the airflow.
Avoid the following installation sites to ensure correct measurements:
rooftops, sides of buildings, shaded areas, steep slopes, heat sources,
swamps, high vegetation, and places that might hold water after rains.
In general, there should be at least 150 m of open area to all directions
from the mast. The minimum distance between the mast and obstacles is
ten times the height of an obstacle. Refer to Figure 3 below.
1012-170
Figure 3 Recommended Mast Location in Open Area