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AN/SPG-51

{{use mdy dates|date=October 2021}}

{{Infobox Radar

|name = AN/SPG-51

|image = USS Richard E Byrd (DDG 23) aft.jpg

|caption = The superstructure of the {{USS|Richard E. Byrd|DDG-23}} showing the ship's radars, 1983. There are two AN/SPG-51 directors shown directly in the center of the image.

|country = United States

|introdate =

|number =

|type = Pulse-Doppler radar, Missile fire-control

|frequency = * Illuminator: 10.25-10.5 GHz

  • Tracking Radar: 5.45 GHz - 5.825 GHz{{efn|All data in infobox is for SPG-51D unless otherwise stated}}

|range = Tracking Radar: {{cvt|100|nmi|km}}

|altitude =

|diameter =

|azimuth = 360° at 12°/s{{efn|name=unknown-version|It is uncertain as to which version of the SPG-51 this performance figure comes from.}}

|elevation = -30° to 83°{{cite journal |journal=Electronic Progress |date=Winter 1974 |volume=16 |issue=4 |page=4 |title=Mechanically-Scanning Antennas |last1=Winter |first1=Charles F.|bibcode=1974ElPr...16....2W }}{{efn|name=unknown-version}}

|precision = Fire control quality three-dimensional data

|power = * Illuminator: 4000 W

  • Tracking Radar:
  • 1600 W average
  • 81 kW peak

|manufacturer=Raytheon

|PRF = * 4100 pps (surface)

  • 9600-16700 pps (air)

| beamwidth = * Illuminator: 0.9° (horizontal), 0.9° (vertical)

  • Tracking Radar: 1.6° (horizontal), 1.6° (vertical)

| pulsewidth = Tracking Radar: 2.1-3.2 μs

}}

The AN/SPG-51 is an American tracking / illumination fire-control radar for RIM-24 Tartar and RIM-66 Standard missiles. It is used for target tracking and Surface-to-air missile guidance as part of the Mk. 73 gun and missile director system, which is part of the Tartar Guided Missile Fire Control System.{{Cite book |url=https://www.worldcat.org/oclc/655668873 |title=Jane's weapon systems. 1972-73: 4th ed. |date=1972 |publisher=Jane's Yearbooks |others=Ronald Thomas Pretty, Dennis Henry Ross Archer |isbn=0-354-00105-1 |location=London |pages=540 |oclc=655668873}}

Aircraft tracking is based on monopulse radar utilizing Pulse-Doppler radar signal processing in MK 74 MOD 14 and MK 74 MOD 15. The MK 74 MOD 15 configuration includes continuous-wave radar tracking in addition to pulse-Doppler tracking. It provides illumination for bistatic radar operation associated with missile guidance in all configurations. Older systems rely on conical scanning rather than monopulse.

Platforms

={{Navy|France}}=

  • {{sclass|T 47|destroyer}} (Du Chayla subclass post AAW modernization){{Cite book |last=Jordan |first=John |url=https://www.worldcat.org/oclc/13010345 |title=An illustrated guide to modern destroyers |date=1986 |publisher=Prentice Hall |isbn=0-13-450776-2 |location=New York, N.Y. |oclc=13010345 |pages=58, 70, 77, 79, 134}}{{Cite book |url=https://www.worldcat.org/oclc/5798981 |title=The World's navies |date=1979 |publisher=David and Charles |others=Christopher Chant |isbn=0-7153-7689-6 |location=Newton Abbot [England] |oclc=5798981|pages=63,92-93,104,122,229,231,241}}
  • {{sclass|Cassard|frigate}}{{Cite book |url=https://www.worldcat.org/oclc/14161346 |title=Combat fleets of the world : their ships, aircraft, and armament, 1986/87 |date=1986 |publisher=Naval Institute Press |others=Jean Labayle Couhat, United States Naval Institute |isbn=0-85368-860-5 |edition=6th |location=Annapolis, Md. |pages=13,123,420,643 |oclc=14161346}}

={{Navy|West Germany}}=

  • {{sclass|Lutjens|destroyer}}

={{Navy|Italy}}=

  • {{sclass|Audace|destroyer}}
  • {{sclass|Durand de la Penne|destroyer}}{{Cite book |url=https://www.worldcat.org/oclc/652063550 |title=Jane's fighting ships, 2009-2010 2009/2010 |date=2009 |publisher=Jane's Information Group |others=Stephen Saunders |isbn=978-0-7106-2888-6 |edition=112th |location=Coulsdon |pages=395 |oclc=652063550}}
  • {{sclass|Impavido|destroyer}}

={{navy|Japan}}=

  • {{sclass|Amatsukaze|destroyer}}
  • {{sclass|Hatakaze|destroyer}}
  • {{sclass|Tachikaze| destroyer}}

={{Navy|Australia}}=

  • {{sclass|Perth|destroyer}}

={{Navy|Netherlands}}=

  • {{sclass|Tromp|frigate}}

= {{naval|Spain}} =

  • {{sclass|Baleares|frigate}}

={{navy|US}}=

  • {{sclass|Albany|cruiser}}{{cite book |title=NAVEDTRA 10199-C: Gunner's Mate M 3 & 2 |publisher=Naval Education and Training Support Command |year=1977 |page=147 |url=https://books.google.com/books?id=Qk8IadGw51cC}}
  • {{sclass|Brooke|frigate}}
  • {{sclass|California|cruiser}}{{Cite book |url=https://www.worldcat.org/oclc/20284225 |title=Jane's strategic weapons systems |date=1989 |publisher=Jane's Information Group |others=Duncan Lennox, Roger Loasby, Jane's Information Group |isbn=0-7106-0880-2 |edition=1st |location=Coulsdon, Surry, Eng. |pages=405 |oclc=20284225}}
  • {{sclass|Charles F. Adams|destroyer}}
  • {{sclass|Forrest Sherman|destroyer}} (DDG conversion with Tartar)
  • {{USS|Decatur|DDG-31}}
  • {{USS|John Paul Jones|DDG-32}}
  • {{USS|Parsons|DDG-33}}
  • {{USS|Somers|DDG-34}}
  • {{sclass|Kidd|destroyer}}
  • {{sclass|Virginia|cruiser}}

Variants

  • SPG-51: Original Model.
  • SPG-51B: Upgraded SPG-51 designed for use with Improved Tartar (IT) missile.{{Cite journal |date=1965-07-01 |title=Evaluating the DDG |url=https://www.usni.org/magazines/proceedings/1965/july/evaluating-ddg |access-date=2023-02-18 |language=en |journal=Proceedings of the U.S. Naval Institute|volume=91|issue=7|page=749}}
  • 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 to permit the transmission to be chosen from a much wider bandwidth. Increased use of integrated circuitry and digital circuitry.{{cite report |url=https://archive.org/details/DTIC_ADC016190 |title=Reliability of Naval Radar Systems |last1=Hemenway |first1=D.F. |last2=Navid |first2=B.N. |publisher=Naval Research Laboratory |location=Washington D.C. |date=September 1978 |pages=83–88}}
  • SPG-51E: Proposed "universal fire control radar" capable of controlling the RIM-8 Talos as well as Tartar.{{Cite book |last=Friedman |first=Norman |url=https://www.worldcat.org/oclc/8262709 |title=Naval radar |date=1981 |publisher=Naval Institute Press |isbn=0-87021-967-7 |location=Annapolis, Md. |pages=179–180 |oclc=8262709}} Not built in quantity.{{Cite book |last=Friedman |first=Norman |url=https://www.worldcat.org/oclc/20098065 |title=The Naval Institute guide to world naval weapons systems |date=1989 |publisher=Naval Institute Press |others=United States Naval Institute |isbn=0-87021-793-3 |location=Annapolis, Md. |pages=201 |oclc=20098065}}

File:TARTAR fire control radars mg 5851.jpg|AN/SPG-51 radars of a Cassard class frigate

References

{{Reflist}}

Notes

{{Notelist}}

See Also

{{Portal|Electronics}}

External links

  • [http://www.fas.org/man/dod-101/sys/ship/weaps/mk-74.htm MK-74 Guided Missile Fire Control System (GMFCS)]
  • [http://www.globalsecurity.org/military/systems/ship/systems/an-spg-51.htm AN/SPG-51D Missile Director Radar]

Category:Sea radars

Category:Military electronics of the United States

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