What is it used for?
Search radars emit pulses of short radio waves that are reflected by objects such as ships or planes, and detect their return. The data are analyzed to create a visual image of the volume covered by the radar. The resulting radar video is usually displayed in a series of azimuth values (360 degrees) as a sequence of sectors. Radar video may contain a number of anomalous returns, especially during highly stable atmospheric conditions. Anomalies are also sometimes found at coastal sites, causing radar “sea returns” that are similar in appearance to ground clutter.