The USA’s MIM-104 Phased Array Tracking Radar Intercept On Target (PATRIOT) anti-air missile system offers an advanced backbone for medium-range air defense, and short-range ballistic missile defense, to America and its allies. This article covers domestic and foreign purchase requests and contracts for Patriot systems. It also compiles information about the engineering service contracts that upgrade these systems, ensure that they continue to work, and integrate them with wider command and defense systems.
The Patriot missile franchise’s future appears assured. At present, 12 nations have chosen it as a key component of their air and missile defense systems: the USA, Germany, Greece, Japan, Israel, Kuwait, The Netherlands, Saudi Arabia, South Korea, Spain, Taiwan and the UAE. Poland, Qatar, and Turkey have all indicated varying levels of interest, and some existing customers are looking to upgrade their systems.
Timely Defenders: Keeping Patriots in Shape
by Defense Industry Daily staff
https://www.defenseindustrydaily.com/2007-updates-keeping-patriots-in-shape-02968/#more-2968
MIM-104 Patriot
Wikipedia
https://en.wikipedia.org/wiki/MIM-104_Patriot
The MIM-104 Patriot is a surface-to-air missile (SAM) system, the primary of its kind used by the United States Army and several allied nations. It is manufactured by the U.S. defense contractor Raytheon and derives its name from the radar component of the weapon system. The AN/MPQ-53 at the heart of the system is known as the “Phased array Tracking Radar to Intercept on Target” or the bacronym PATRIOT. The Patriot System replaced the Nike Hercules system as the U.S. Army’s primary High to Medium Air Defense (HIMAD) system, and replaced the MIM-23 Hawk system as the U.S. Army’s medium tactical air defense system. In addition to these roles, Patriot has been given the function of the U.S. Army’s anti-ballistic missile (ABM) system, which is now Patriot’s primary mission.
Patriot uses an advanced aerial interceptor missile and high-performance radar systems. Patriot was developed at Redstone Arsenal in Huntsville, Alabama, which had previously developed the Safeguard ABM system and its component Spartan and hypersonic speed Sprint missiles. The symbol for Patriot is a drawing of a Revolutionary War-era Minuteman.
Patriot systems have been sold to Taiwan, Egypt, Germany, Greece, Israel, Japan, Kuwait, the Netherlands, Saudi Arabia, United Arab Emirates, Jordan and Spain. Poland hosts training rotations of a battery of U.S. Patriot launchers. This started in the town of Morąg in May 2010 but was later moved further from the Russian border to Toruń and Ustka due to Russian objections. South Korea also purchased several second-hand Patriot systems from Germany after North Korea test-launched ballistic missiles to the Sea of Japan and proceeded with underground nuclear testing in 2006. On December 4, 2012, NATO authorized the deployment of Patriot missile launchers in Turkey to protect the country from missiles fired in the civil war in neighboring Syria.
The Patriot air defense system achieved its first shoot downs of enemy aircraft in the service of the Israeli Air Defense Command. Israeli MIM-104D batteries shot down two Hamas UAVs during Operation Protective Edge in 2014 and later, on September 23, 2014 an Israeli Patriot battery shot down a Syrian Air Force Sukhoi Su-24 which had penetrated Israeli airspace, achieving the first shoot down of a manned enemy aircraft in the world for the system.
MIM-104F (PAC-3)
PAC-3 missile launcher, note four missiles in each canister
The PAC-3 upgrade is a significant upgrade to nearly every aspect of the system. It took place in three stages, and units were designated Configuration 1, 2, or 3.
The system itself saw another upgrade of its WCC and its software, and the communication setup was given a complete overhaul. Due to this upgrade, PAC-3 operators can now see, transmit, and receive tracks on the Link 16 Command and Control (C2) network using a Class 2M Terminal or MIDS LVT Radio. This capability greatly increases the situational awareness of Patriot crews and other participants on the Link 16 network than are able to receive the Patriot local air picture. The software can now conduct a tailored TBM search, optimizing radar resources for search in a particular sector known to have ballistic missile activity, and can also support a “keepout altitude” to ensure ballistic missiles with chemical warheads or early release submunitions (ERS) are destroyed at a certain altitude. For Configuration 3 units, the Patriot radar was completely redesigned, adding another travelling wave tube (TWT) that increased the radar’s search, detection, tracking, and discrimination abilities. The PAC-3 radar is capable, among other things, of discriminating whether or not an aircraft is manned and which of multiple reentering ballistic objects are carrying ordnance.
The PAC-3 upgrade carried with it a new missile design, nominally known as MIM-104F and called PAC-3 by the Army. The PAC-3 missile evolved from the Strategic Defense Initiative’s ERINT missile, and so it is dedicated almost entirely to the anti-ballistic missile mission. Due to miniaturization, a single canister can hold four PAC-3 missiles (as opposed to one PAC-2 missile per canister). The PAC-3 missile is also more maneuverable than previous variants, due to 180 tiny pulse solid propellant rocket motors mounted in the forebody of the missile (called Attitude Control Motors, or ACMs) which serve to fine align the missile trajectory with its target to achieve hit-to-kill capability. However, the most significant upgrade to the PAC-3 missile is the addition of a Ka band active radar seeker. This allows the missile to drop its uplink to the system and acquire its target itself in the terminal phase of its intercept, which improves the reaction time of the missile against a fast-moving ballistic missile target. The PAC-3 missile is accurate enough to select, target, and home in on the warhead portion of an inbound ballistic missile. The active radar also gives the warhead a “hit-to-kill” (kinetic kill vehicle) capability that completely eliminates the need for a traditional proximity-fused warhead. However, the missile still has a small explosive warhead, called Lethality Enhancer, a warhead which launches 24 low-speed tungsten fragments in radial direction to make the missile cross-section greater and enhance the kill probability. This greatly increases the lethality against ballistic missiles of all types.
The PAC-3 upgrade has effectively quintupled the “footprint” that a Patriot unit can defend against ballistic missiles of all types, and has considerably increased the system’s lethality and effectiveness against ballistic missiles. It has also increased the scope of ballistic missiles that Patriot can engage, which now includes several intermediate range. However, despite its increases in ballistic missile defense capabilities, the PAC-3 missile is a less capable interceptor of atmospheric aircraft and air-to-surface missiles. It is slower, has a shorter range, and has a smaller explosive warhead compared to older Patriot missiles.
Patriot’s PAC-3 interceptor is the primary interceptor for the new MEADS system, which was scheduled to enter service alongside Patriot in 2014. On November 29, 2012, the MEADS detected, tracked, intercepted and destroyed an air-breathing target in its first-ever intercept flight test at White Sands Missile Range, N.M.
Lockheed Martin Missiles and Fire Control is the prime contractor on the PAC-3 Missile Segment upgrade to the Patriot air defense system which will make the missile more agile and extend its range by up to 50%. The PAC-3 Missile Segment upgrade consists of the PAC-3 missile, a very agile hit-to-kill interceptor, the PAC-3 missile canisters (in four packs), a fire solution computer, and an Enhanced Launcher Electronics System (ELES). The PAC-3 Missile Segment Enhancement (MSE) interceptor increases altitude and range through a more powerful dual-pulse motor for added thrust, larger fins that collapse inside current launchers, and other structural modifications for more agility. The U.S. Army accepted the first PAC-3 MSE interceptors on 6 October 2015.
Patriot Advanced Affordable Capability-4 (PAAC-4)
In August 2013, Raytheon and Rafael Advanced Defense Systems began to seek funding for a fourth-generation Patriot intercepting system, called the Patriot Advanced Affordable Capability-4 (PAAC-4). The system aims to integrate the Stunner interceptor from the jointly-funded David’s Sling program with Patriot PAC-3 radars, launchers, and engagement control stations. The two-stage, multimode seeking Stunner would replace single-stage, radar-guided PAC-3 missiles produced by Lockheed Martin. Government and industry sources claim the Stunner-based PAAC-4 interceptors will offer improved operational performance at 20 percent of the $2 million unit cost of the Lockheed-built PAC-3 missiles. The companies are seeking $20 million in U.S. government funding to demonstrate cost and performance claims through a prototype PAAC-4 system. Israeli program officials have said that a previous teaming agreement between Raytheon and Rafael would allow the U.S. company to assume prime contractor status, and produce at least 60 percent of the Stunner missile in the United States. The Missile Defense Agency has said that the U.S. Army is considering use of the Stunner as a potential solution to future U.S. military requirements.
Future
Patriot upgrades continue, with the most recent being new software known as PDB-7.x (PDB standing for “Post Deployment Build”). This software will allow Configuration 3 units to discriminate targets of all types, to include anti-radiation missile carriers, helicopters, unmanned aerial vehicles, and cruise missiles.
The PAC-3 missile is currently being upgraded through the Missile Segment Enhancement (MSE). The MSE upgrade includes a new fin design and a more powerful rocket engine.
Lockheed Martin has proposed an air-launched variant of the PAC-3 missile for use on the F-15C Eagle. Other aircraft, such as the F-22 Raptor and the P-8A Poseidon, have also been proposed.
In the long term, it is expected that existing Patriot batteries will be gradually upgraded with MEADS technology. Because of economic conditions, the U.S. chose to upgrade its Patriot missiles instead of buying the MEADS system.
Raytheon has developed the Patriot guidance enhanced missile (GEM-T), an upgrade to the PAC-2 missile. The upgrade involves a new fuse and the insertion of a new low noise oscillator which increases the seeker’s sensitivity to low radar cross-section targets.
In April 2013, Raytheon received U.S. Army approval for a second recertification, extending the operational life of the worldwide inventory of Patriot missiles from 30 to 45 years.
Missile defense systems by country
Wikipedia
https://en.wikipedia.org/wiki/Missile_defense_systems_by_country
Missile defense systems are a type of missile defense intended to shield a country against incoming missiles, such as intercontinental ballistic missile (ICBMs) or other ballistic missiles. The United States, Russia, France, India and Israel have all developed missile defense systems.
Japan
In 2015, the Japan Air Self Defense Force (JASDF), and also the Japan Ground Self Defense Force (JGSDF), initiated their 51st year of annual live-fire missile launches at McGregor Range, New Mexico in Fort Bliss. The 2014 annual service practice of the PAC-3 Patriot missile demonstrated a 100 percent kill rate before a group which included the commanding general of WSMR, and the 32nd Army Air & Missile Defense Command (AAMDC). Every JASDF Patriot team participated in the annual exercise, which takes several months.
Since 1998, when North Korea launched a Taepodong-1 missile over northern Japan, the Japanese have been jointly developing a new Surface-to-air interceptor known as the Patriot Advanced Capability 3 (PAC-3) with the US. So far tests have been successful, and there are planned 11 locations that the PAC-3 will be installed. A military spokesman said that tests had been done on two sites, one of them a business park in central Tokyo, and Ichigaya – a site not far from the Imperial Palace. Along with the PAC-3, Japan has installed a US-developed ship-based anti-ballistic missile system, which was tested successfully on 18 December 2007. The missile was launched from a Japanese warship, in partnership with the US Missile Defense Agency and destroyed a mock target launched from the coast.
Japan is in consultations with the United States to possibly deploy the Terminal High Altitude Area Defense (THAAD) system and a ground-based version of the Standard Missile-3 interceptors mounted on Aegis destroyers. Japan’s intention is to create a four-stage anti-missile shield.