Long Range Discrimination Radar

Last updated
AN/SPY-7
Country of origin United States
Type Active electronically scanned array early-warning radar
Frequency S band
Other NamesLong Range Discrimination Radar (LRDR)

The Long Range Discrimination Radar(LRDR) in Alaska is part of the United States's Ground-Based Midcourse Defense anti-ballistic missile system. The main contractor is Lockheed Martin, under a US$784 million contract from the Missile Defense Agency in October 2015. [1]

Contents

LRDR is a gallium nitride (GaN)-based, solid-state active electronically scanned array (AESA) early-warning radar [1] that allows for continuous coverage, even when it is undergoing maintenance. [2] The radar consists of individual solid state radar blocks that can be combined to scale up the size of the radar. The multi-purpose GaN device used on the prototype version of the LRDR is from the Japanese electronics company Fujitsu, according to Lockheed Martin. [3]

Construction in Alaska for the LRDR was scheduled to begin in 2019, [1] tentatively at Clear Space Force Station in central Alaska. [4] Each AESA's dimensions are 60 feet high by 60 feet wide; the field of view is 220 degrees. [5]

In late February 2021, the Missile Defense Agency said that the radar installation was underway, with Initial Operational Capability to be achieved in 2021. [6] Testing for Full Operational Capability is expected by 2023. [5]

In mid-August 2023, the Flight Test Other-26 (FTX-26) was cancelled due to an anomaly with the live ballistic missile target. When operational, the LRDR will be tied into the Ground-Based Midcourse Defense system and the Command and Control, Battle Management and Communications system. [7]

AN/SPY-7(V)1

The AN/SPY-7(V)1 is the official designation of an LRDR-derivative used with the Aegis Ballistic Missile Defense System. On 30 July 2018, the Japanese government approved a plan to purchase two pairs of AN/SPY-7(V)1 for the Aegis Ashore facility and will be installed in Yamaguchi Prefecture and Akita Prefecture. The first operation is expected to start from 2025, by Japan Ground Self Defense Force. [8]

Missile Defense Agency has also decided to use AN/SPY-7(V)1 for the Aegis Ashore to be installed in Hawaii. Derivatives of the AN/SPY-7(V)1 will be used on the River-class destroyer and the Spanish F-110 frigate. [9]

In September 2020, AN/SPY-7(V)1 was chosen by Canada as the primary radar for its future River-class destroyer along with CMS-330 Combat Management System with Aegis Combat System. [10]

Lockheed Martin promoted this version of radar as the AN/SPY-1 refurbishment program to the US Navy to extend the lifespan of the Ticonderoga-class cruiser and Arleigh Burke-class destroyer to beyond the 2040s. [11] In December 2021, the AN/SPY-6 AESA radar from Raytheon was selected to retrofit Flight IIA Arleigh Burke destroyers; the same radar is used on Flight III ships. [12] [13]

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References

  1. 1 2 3 Alaska's Long Range Discrimination Radar on Track for 2020 [ dead link ], Jen Judson, DefenseNews.com, 16 August 2016
  2. ↑ "Long Range Discrimination Radar (LRDR)".
  3. ↑ Lockheed Martin Demonstrates Next Generation Aegis Ashore Solution Lockheed Martin, Jan 11 2018
  4. ↑ Department of Defense Identifies Planned Site of Future Long Range Discrimination Radar (LRDR), DoD press release NR-193-15, 22 May 2015, accessed 17 August 2016
  5. 1 2 C. Todd Lopez, DOD News (7 Dec 2021) Long-Range Discrimination Radar Reshapes Adversaries' Calculus for Attacks Against U.S. Homeland
  6. ↑ MDA says Alaska-based missile defense radar will be operational in 2021, Jen Judson, DefenseNews, 2021-03-03
  7. ↑ Missile Defense Agency cancels test of Long-Range Discrimination Radar, Jen Judson, Defense News, 2023-09-02
  8. ↑ On the result of component selection of the Aegis system (Aegis Ashore) on land deployment(Japanese) Ministry of Defense Japan, 30 July 2018
  9. ↑ "U.S. Government Designates Lockheed Martin's Latest Generation Radar: AN/SPY-7(V)1 - Nov 14, 2019". Media - Lockheed Martin. Retrieved 2019-12-24.
  10. ↑ "Lockheed Martin Signs SPY-7 Radar Contract for CSC Frigate". 11 November 2020.
  11. ↑ Lockheed Martin Advocates Accelerating Aegis, SPY-1 Upgrades USNI.org January 10, 2017
  12. ↑ "U.S. Navy's SPY-6 Family of Radars". www.raytheonmissilesanddefense.com. Raytheon. 12 July 2020. Retrieved 12 July 2020.
  13. ↑ Justin Katz Raytheon to start backfitting destroyers with SPY-6 radar. Breaking Defense (11 Jan 2022)

See Also

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