AN/SPG-62
The two rearward AN/SPG-62 fire-control radars aboard JS Kirishima (DDG-174)
Country of originUnited States
DesignerRaytheon
TypeMissile fire-control
Frequency8–12 GHz (I–J Band)
Power10 kW (average)

The AN/SPG-62 is a continuous wave fire-control radar developed by the United States, and it is currently deployed on warships equipped with the Aegis Combat System.[1] It provides terminal target illumination for the semi-active SM-2MR/ER and ESSM Block 1 surface-to-air missiles.[2][3] It also provides illumination for the active SM-6 if it is used in semi-active mode. The antenna is mechanically steered,[4] uses a parabolic reflector,[5] and operates at 8 to 12 GHz (I–J Band).[2][1] The system is a component of the Mk 99 fire-control system (FCS).[1]

The first units were installed on the cruiser USS Ticonderoga, which was commissioned in 1983. Since then, the SPG-62 has been placed in service with many U.S. and foreign navy ships that have the Aegis Combat System.

The SPG-62's role in Aegis fire control is to illuminate targets in the terminal interception phase. First, the ship's main search radars—either the AN/SPY-1 or the AN/SPY-6—detect and track the target. The Mk 99 FCS then launches surface-to-air missile(s) to intercept. If the interceptor missile uses semi-active radar homing (SM-2 or ESSM Block 1), it will need an external radar to illuminate its target for terminal guidance, which is where the SPG-62 comes into play. The Mk 99 FCS points an SPG-62 toward the target, and it shoots a narrow radar beam that reflects off the target. The interceptor missile's passive receiver homes in on these reflected emissions.[4]

It uses a very narrow beam of radiofrequency (RF) radiation. This accomplishes four things:

  1. Provides very precise target tracking
  2. Gives the AN/SPG-62 a high radar resolution, which makes it more effective in determining if there is one contact or multiple contacts[4]
  3. Enables the AN/SPG-62 to serve as a secondary, rudimentary search radar (in conjunction with the SPY-1 or SPY-6)[4]
  4. Requires a relatively low level of energy to operate (10 kW peak power on average)[1]

Because illumination is only needed for the last few seconds prior to interception,[4] a ship can have more semi-active SAMs in the air than it has SPG-62s. In the event of a saturation attack, the Aegis Combat System can time-share each AN/SPG-62 to serve multiple semi-active interceptors in the air at once.[6]

Users

Navy Ship class # of AN/SPG-62 per ship
 Royal Australian Navy Hobart-class destroyer 2
 Japan Maritime Self-Defense Force Atago-class destroyer 3
Maya-class destroyer 3
Kongō-class destroyer 3
 Republic of Korea Navy Sejong the Great-class destroyer 3
 Royal Norwegian Navy Fridtjof Nansen-class frigate 2
 Spanish Navy Álvaro de Bazán-class frigate 2
F110-class frigate 2
 United States Navy Arleigh Burke-class destroyer 3
Ticonderoga-class cruiser 4

References

  1. 1 2 3 4 "AN/SPG-62 Fire Control Radar". www.globalsecurity.org. Archived from the original on 19 October 2014. Retrieved 3 September 2022.
  2. 1 2 Donaldson, Peter (2008). "Electronic Warfare Handbook 2008". Sandy Doyle. CiteSeerX 10.1.1.174.4209. Archived from the original on 12 April 2022.
  3. ↑ "Evolved Seasparrow Missile (ESSM)". Missile Threat. Archived from the original on 7 June 2019. Retrieved 3 September 2022.
  4. 1 2 3 4 5 "Fire Controlman, Volume 2–Fire-Control Radar Fundamentals" (PDF). Naval Education and Training Professional Development Center. October 2000. Archived (PDF) from the original on 30 October 2014. Retrieved 4 September 2022.
  5. ↑ "Contracts for July 29, 2019". U.S. Department of Defense. Archived from the original on 17 October 2021. Retrieved 4 September 2022.
  6. ↑ "CG-47 Ticonderoga-class". www.globalsecurity.org. Archived from the original on 7 December 2014. Retrieved 5 September 2022.
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