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The antenna system of a typical air traffic control radar, the ASR-9. The curved reflector antenna on the bottom is the primary surveillance radar (PSR), and the flat antenna on top of it is the secondary surveillance radar (SSR). In operation the antenna rotates about a vertical axis, sweeping a vertical fan-shaped beam of microwaves around ...
This information is displayed on the radar screen beside the aircraft's icon for use by the air traffic controller. The transponder code is assigned to the aircraft by the air traffic controller before takeoff. Controllers use the term "squawk" when they are assigning a transponder code, e.g., "Squawk 7421".
The radar system was designed to meet, or exceed the need of a terminal Air Traffic Control Automation facility through the year 2005. The ASR-9 utilized a dual beam antenna, a dual channel antenna, a linear-wide range receiver and new digital processing equipment.
SSR antenna of Deutsche Flugsicherung at Neubrandenburg, in Mecklenburg/Western Pomerania Transponder in a private aircraft squawking 2000. Secondary surveillance radar (SSR) [1] is a radar system used in air traffic control (ATC), that unlike primary radar systems that measure the bearing and distance of targets using the detected reflections of radio signals, relies on targets equipped with ...
The information from the signal is sent to an Air Traffic Control tower, or a Radar Approach Control (RAPCON) with a digital tag that describes the location, heading, and speed at which the aircraft is moving. The overall operation of the ASR-11 is similar to that of the ASR-9, with relatively few differences between the two radar systems.
AN/APG-33 Hughes Aircraft X band fire control radar for Northrop F-89A Scorpion Lockheed F-94A/B Starfire and Avro Canada CF-100 Canuck; AN/APG-34 gun aiming radar for Lockheed F-104C Starfighter; AN/APG-35 fire control radar for Douglas F3D Skyknight; AN/APG-36 fire control radar for McDonnell F2H-2N Banshee and North American F-86D Sabre
Long range air traffic control and surveillance; 'L' for 'long'. Widely used for long range early warning radars as they combine good reception qualities with reasonable resolution. S: 2–4 GHz: 7.5–15 cm: Moderate range surveillance, Terminal air traffic control, long-range weather, marine radar; 'S' for 'sentimetric', its code-name during ...
Air traffic control uses primary and secondary radars. Primary radars are a "classical" radar which reflects all kind of echoes, including aircraft and clouds. Secondary radar emits pulses and listens for special answer of digital data emitted by an Aircraft Transponder as an answer.