Radar is an electronic system that measures the range and bearing of objects by transmitting an electromagnetic pulse at the object and listening for the echo.
- Acronym for “Radio Detection And Ranging”.
- The system consists of a transmitter producing electromagnetic waves, a transmitting antenna, a receiving antenna, and a receiver and processor to determine the properties of the object.
- Radio waves from the transmitter reflect off the object and return to the receiver, giving information about the object.
- Determine the range, angle, or velocity of objects.
- Used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations, and terrain.
In aviation, many types of radar are in use:
- Area Radars, Surveillance Radars, and Approach Radars allow controllers to track aircraft within their area of responsibility
- Precision Approach Radars (PAR) enables controllers to provide precision approach guidance to aircraft landing in instrument conditions
- Surface Movement Radar enables controllers to track the movement of aircraft and vehicles on an aerodrome surface
- Weather Radar gives pilots situational awareness of hazardous weather, especially thunderstorms
- Radio Altimeters accurately measure the height of an aircraft above the surface
- Secondary Surveillance Radar enables aircraft to pass additional information, such as identification and flight level, back to the interrogating radar
Source : wiki, skybrary
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