Radar display
Videos
A radar display is an electronic device that presents radar data to the operator. The radar system transmits pulses or continuous waves of electromagnetic radiation, a small portion of which backscatt
An airport surveillance radar display
Chain Home is the canonical A-scope system. This image shows several target "blips" at ranges between 15 and 30 miles from the station. The large blip on the far left is the leftover signal from the radar's own transmitter; targets in this area could not be seen. The signal is inverted to make measurement simpler.
The L-scope was basically two A-scopes placed side by side and rotated vertically. By comparing the signal strength from two antennas, the rough direction of the blip could be determined. In this case there are two blips, a large one roughly centred and a smaller one far to the right.
This image shows a modern PPI display in use, with the islands and ground surrounding the ship in green.
Plan position indicator
Videos
A plan position indicator is a type of radar display that represents the radar antenna in the center of the display, with the distance from it and height above ground drawn as concentric circles. As t
Image of a thunderstorm line (in dBZ) seen on a 0.7-degree elevation PPI (NOAA)
A photograph of an H2S PPI display taken during an attack on Cologne. The annotations were added later for post-attack analysis. The Rhine River can clearly be seen.