The AN/SPG-51 is an American tracking / illumination

fire-control radar A fire-control radar (FCR) is a radar that is designed specifically to provide information (mainly target azimuth, elevation, range and range rate) to a fire-control system in order to direct weapons such that they hit a target. They are someti ...

for

RIM-24 Tartar The General Dynamics RIM-24 Tartar was a medium-range naval surface-to-air missile (SAM), among the earliest SAMs to equip United States Navy ships. The Tartar was the third of the so-called "3 Ts", the three primary SAMs the Navy fielded in the ...

and

RIM-66 Standard The RIM-66 Standard MR (SM-1MR/SM-2MR) is a medium-range surface-to-air missile (SAM), with a secondary role as an anti-ship missile, developed for the United States Navy (USN). A member of the Standard Missile family of weapons, the SM-1 was dev ...

missiles. It is used for target tracking and

Surface-to-air A surface-to-air missile (SAM), also known as a ground-to-air missile (GTAM) or surface-to-air guided weapon (SAGW), is a missile designed to be launched from the ground or the sea to destroy aircraft or other missiles. It is one type of anti-a ...

missile guidance Missile guidance refers to a variety of methods of guiding a missile or a guided bomb to its intended target. The missile's target accuracy is a critical factor for its effectiveness. Guidance systems improve missile accuracy by improving its P ...

as part of the Mk. 73 gun and missile director system, which is part of the

Tartar Guided Missile Fire Control System Tartar may refer to: Places * Tartar (river), a river in Azerbaijan * Tartar, Switzerland, a village in the Grisons * Tərtər, capital of Tartar District, Azerbaijan * Tartar District, Azerbaijan * Tartar Island, South Shetland Islands, Anta ...

. Aircraft tracking is based on

monopulse radar Monopulse radar is a radar system that uses additional encoding of the radio signal to provide accurate directional information. The name refers to its ability to extract range and direction from a single signal pulse. Monopulse radar avoids prob ...

utilizing

Pulse-Doppler radar A pulse-Doppler radar is a radar system that determines the range to a target using pulse-timing techniques, and uses the Doppler effect of the returned signal to determine the target object's velocity. It combines the features of pulse radars and ...

signal processing in MK 74 MOD 14 and MK 74 MOD 15. The MK 74 MOD 15 configuration includes

continuous-wave radar Continuous-wave radar (CW radar) is a type of radar system where a known stable frequency continuous wave radio energy is transmitted and then received from any reflecting objects. Individual objects can be detected using the Doppler effect, which ...

tracking in addition to pulse-Doppler tracking. It provides illumination for

bistatic radar Bistatic radar is a radar system comprising a transmitter and receiver that are separated by a distance comparable to the expected target distance. Conversely, a conventional radar in which the transmitter and receiver are co-located is called ...

operation associated with missile guidance in all configurations. Older systems rely on

conical scanning Conical scanning is a system used in early radar units to improve their accuracy, as well as making it easier to steer the antenna properly to point at a target. Conical scanning is similar in concept to the earlier lobe switching concept used ...

rather than monopulse. In accordance with the

Joint Electronics Type Designation System The Joint Electronics Type Designation System (JETDS), which was previously known as the Joint Army-Navy Nomenclature System (AN System. JAN) and the Joint Communications-Electronics Nomenclature System, is a method developed by the U.S. War Depa ...

(JETDS), the "''AN/SPG-51''" designation represents the 51st design of an Army-Navy electronic device for waterborne fire control radar equipment. The JETDS system also now is used to name all

Department of Defense The United States Department of Defense (DoD, USDOD, or DOD) is an executive department of the U.S. federal government charged with coordinating and supervising the six U.S. armed services: the Army, Navy, Marines, Air Force, Space Force, ...

electronic systems.

Platforms

* (Du Chayla subclass post AAW modernization) *

* * *

* * * * * (DDG conversion with Tartar) ** ** ** ** * *

Variants

* SPG-51: Original Model. * SPG-51B: Upgraded SPG-51 designed for use with Improved Tartar (IT) missile. * SPG-51C: Automatic acquisition and tracking, increased reliability, and improved ECCM capabilities, clutter rejection, and multiple target resolution. * SPG-51D: Klystron replaced with

traveling-wave tube A traveling-wave tube (TWT, pronounced "twit") or traveling-wave tube amplifier (TWTA, pronounced "tweeta") is a specialized vacuum tube that is used in electronics to amplify radio frequency (RF) signals in the microwave range. It was invented ...

to permit the transmission to be chosen from a much wider bandwidth. Increased use of integrated circuitry and digital circuitry. * SPG-51E: Proposed "universal fire control radar" capable of controlling the

RIM-8 Talos Bendix RIM-8 Talos was a long-range naval surface-to-air missile (SAM), among the earliest SAMs to equip United States Navy ships. The Talos used radar beam riding for guidance to the vicinity of its target, and semi-active radar homing (SARH) ...

as well as Tartar. Not built in quantity. File:TARTAR fire control radars mg 5851.jpg, AN/SPG-51 radars of a ''Cassard'' class frigate

References

Notes

External links

MK-74 Guided Missile Fire Control System (GMFCS)
Sea radars Military electronics of the United States {{USN-stub

Platforms

Variants

References

Notes

See Also

External links