> For the complete documentation index, see [llms.txt](https://brightwind.gitbook.io/brighthub-user-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://brightwind.gitbook.io/brighthub-user-docs/reference-user-manual/setup-tab/interference-structures.md).

# Interference Structures

### Interference Structures Tab

<figure><img src="/files/oFCeu3RkQJ7hsTTIq88H" alt=""><figcaption></figcaption></figure>

The Interference Structures tab is used to provide details of any physical structures which may interfere with measurements, in particular lightening finials, guy wires or aviation lights.\
\
To **add an interference structure:**

1. Modify the default entry in the **Interference Structures** table which has an autogenerated structure UUID.\
   This row must be filled in before an additional interference structure can be added.
2. For subsequent interference structures, click 'Add Interference Structure'.
3. Select the Structure Type from the dropdown menu (lightning finial, aviation light, guy wires, other).
4. Fill in the Orientation from Mast Centre in degrees, Orientation Reference, Distance from Mast Centre, Diameter of Interference Structure, Date From and Date To.
5. In order to save the details of an interference structure, the structure must be mapped to affected measurement points.\
   To **Map Measurements to Interference Structures** select the relevant Measurements and Interference Structures and click 'Map Structure'.\
   For lightning rods at the top of a mast, the interference structure should be mapped to the closest anemometers.

This information may help to inform adjustments and filters applied to the data in the event of external structures significantly impacting the measurements taken by an instrument.


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