Blind sectors

Obstructions such as funnels and masts near the radar antenna may obstruct the radar beam and cause radar shadows or ‘blind sectors’.

Blind sectorsIf the obstruction is relatively narrow, there will be a reduction of the radar beam intensity, although it may not block the entire beam. However, for wider obstructions, there may be a total block of the radar beam in the shadow area. There may also be multiple echoes which extend behind the obstruction. Blind sector effects can normally be minimized by careful selection of the radar antenna’s location prior to installation. Targets will not be detected if they are within the blind sector.

1. Antenna.

2. Blind sector.

3. Obstruction (superstructure, funnels, masts, etc.).