The

Emerson Electric Emerson Electric Co. is an American multinational corporation headquartered in Ferguson, Missouri. The ''Fortune'' 500 company manufactures products and provides engineering services for industrial, commercial, and consumer markets.

AN/APQ-153 was an I band

radar Radar is a detection system that uses radio waves to determine the distance ('' ranging''), angle, and radial velocity of objects relative to the site. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, we ...

system developed for the

Northrop F-5 The Northrop F-5 is a family of supersonic light fighter aircraft initially designed as a privately funded project in the late 1950s by Northrop Corporation. There are two main models, the original F-5A and F-5B Freedom Fighter variants and t ...

E fighter aircraft. Required to fit into the tight confines of the originally radar-less F-5, the system offered relatively simple air-to-air modes and a short detection range. The AN/APQ-157 was a similar system with dual displays and controls for the twin-seat F-5F trainer. Many of the F-5s still flying have been upgraded to the improved AN/APQ-159. The APQ-153 was a relatively simple Pulse-Doppler radar intended to improve gunnery on the F-5. It offered four modes of operation; AA1 and AA2 air-to-air target search at different ranges, "dogfight" which locked onto the closest target and offered ranging and gun cueing, and finally a missile bore-sight cueing mode that calculated the engagement envelope of the

AIM-9 Sidewinder The AIM-9 Sidewinder (where "AIM" stands for "Air Intercept Missile") is a short-range air-to-air missile which entered service with the US Navy in 1956 and subsequently was adopted by the US Air Force in 1964. Since then the Sidewinder has prove ...

and gave the pilot directional cues to help them fly into the envelope. The antenna was necessarily small, a parabolic dish that was stabilized to account for maneuvering. This was connected to a small

B-Scope A radar display is an electronic device to present radar data to the operator. The radar system transmits pulses or continuous waves of electromagnetic radiation, a small portion of which backscatter off targets (intended or otherwise) and retur ...

display in the cockpit.

External links

AN/APQ-153/-157 fire-control radars (United States)
{{DEFAULTSORT:AN APQ-153 Aircraft radars Military radars of the United States Radars of the United States Air Force Emerson Electric radars