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The primary responsibility of Chicago Center is sequencing and separation of over-flights, arrivals, and departures in order to provide safe, orderly, and expeditious flow of aircraft. Chicago Center covers approximately 91,000 square miles (240,000 km 2 ) of the Midwestern United States , including parts of Illinois , Indiana , Michigan ...
A primary radar or primary surveillance radar (PSR) is a conventional radar sensor that illuminates a large portion of space with an electromagnetic wave and detects the waves that reflect from targets within that space. The term thus refers to a radar system used to detect and localize potentially non-cooperative targets.
The secondary radar is a rotating flat antenna, often mounted on top of the primary radar dish, which transmits a narrow vertical fan-shaped microwave beam on a frequency of 1030 MHz in the L band with peak power of 160 - 1500 W. When it is interrogated by this signal, the aircraft's transponder beacon transmits a coded identifying microwave ...
This station first began in 1954 as the first weather radio system in the Chicago area dedicated to the aviation user and continued until 1958 when the aviation broadcast went dark. Ivan Brunk, meteorologist in charge of the Chicago U.S. Weather Bureau (now National Weather Service) office at that time, suggested that the radio service be ...
Terminal Radar Service Area was established as part of a program to create terminal radar stations at selected airports. Because they were not subject to the rulemaking process of 14 CFR Part 91, they do not fit into any existing U.S. classifications of airspace, and have been classified as non-part 71 airspaces.
Secondary surveillance radar antenna (flat rectangle, top) mounted on an ASR-9 primary airport surveillance radar antenna (curved rectangle, bottom).. The need to be able to identify aircraft more easily and reliably led to another wartime radar development, the Identification Friend or Foe (IFF) system, which had been created as a means of positively identifying friendly aircraft from unknowns.
The Airport Movement Area Safety System (AMASS) visually and aurally prompts tower controllers to respond to situations which potentially compromise safety. AMASS is an add-on enhancement to the host Airport Surface Detection Equipment Model 3 (ASDE-3) radar that provides automated aural alerts to potential runway incursions and other hazards.
Chanute Air Force Base, Rantoul, Illinois (closed in 1993) Hanna City Air Force Station , Hanna City, Illinois (closed in 1968; now site of an FAA Long Range Radar ) Scott Air Force Base , Shiloh, Illinois