Placing mast - DKE110F

DKE110F User Guide

Document code
M211788EN
Revision
E
Language
English
Product
DKE110F
Document type
User guide

To obtain representative ambient measurements, it is important to find a suitable location for the mast. Usually, this is a steady and dry place that represents the general area of interest. For further information, see local recommendations and the World Meteorological Organization (WMO) recommendations.

Always make a detailed siting plan according to local requirements. Vaisala recommends that you always consult a local civil engineer for this purpose.

Allow sufficient clearance for the wind sensors. Do not locate the mast next to a building or any other object that may affect the airflow. The following figures provide general guidelines for the mast location.

Figure 1. Recommended mast location in open area. In general, there should be at least 150 meters (500 feet) of open area to all directions from the mast. The minimum distance between the mast and any obstacles is 10 times the height of the obstacle.
Figure 2. Recommended mast height on top of building. The recommended minimum height (h in the following figure) for a mast 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 times W.

The position of the wind mast should be representative of the touchdown zone and take‑off area. Consider the surrounding obstacles and soil surface because they may affect wind measurements. By using frangible masts, such as DKE110F, wind sensors can be installed closer to the runway.