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The launching station contains four major equipment subsystems: the launcher generator set, the launcher electronics module (LEM), the launcher mechanics assembly (LMA), and the launcher interconnection group (LIG). The generator set consists of a 15 kW, 400 Hz generator that powers the launcher. The LEM is used for th...
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The first fielded variant was the MIM-104A "Standard". It was optimized solely for engagements against aircraft and had very limited capability against ballistic missiles. It had a range of , and a speed in excess of Mach 2. The MIM-104B "anti-standoff jammer" (ASOJ) is a missile designed to seek out and destroy ECM em...
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The MIM-104C PAC-2 missile was the first Patriot missile that was optimized for ballistic missile engagements. The GEM series of missiles (MIM-104D/E) are further refinements of the PAC-2 missile. The PAC-3 missile is a new interceptor, featuring a Ka band active radar seeker, employing "hit-to-kill" interception (in c...
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The first seven of these are in the larger PAC-2 configuration of a single missile per canister, of which four can be placed on a launcher. PAC-3 missile canisters contain four missiles, so that sixteen rounds can be placed on a launcher. The missile canister serves as both the shipping and storage container and the la...
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The PAC-2 family of missiles all have a fairly standard design, the only differences between the variants being certain internal components. They consist of (from front to rear) the radome, guidance section, warhead section, propulsion section, and control actuator section.
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The radome is made of slip-cast fused silica approximately thick, with nickel alloy tip, and a composite base attachment ring bonded to the slip cast fused silica and protected by a molded silicone rubber ring. The radome provides an aerodynamic shape for the missile and microwave window and thermal protection for the ...
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The Patriot guidance section consists primarily of the modular digital airborne guidance system (MDAGS). The MDAGS consists of a modular midcourse package that performs all of the required guidance functions from launch through midcourse and a terminal guidance section. The TVM seeker is mounted on the guidance section...
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The seeker consists of an antenna mounted on an inertial platform, antenna control electronics, a receiver, and a transmitter. The Modular Midcourse Package (MMP), which is located in the forward portion of the warhead section, consists of the navigational electronics and a missile-borne computer that computes the guid...
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The warhead section, just aft of the guidance section, contains the proximity fused warhead, safety-and-arming device, fuzing circuits and antennas, link antenna switching circuits, auxiliary electronics, inertial sensor assembly, and signal data converter.
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The propulsion section consists of the rocket motor, external heat shield, and two external conduits. The rocket motor includes the case, nozzle assembly, propellant, liner and insulation, pyrogen igniter, and propulsion arming and firing unit. The casing of the motor is an integral structural element of the missile ai...
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The Control Actuator Section (CAS) is at the aft end of the missile. It receives commands from the missile autopilot and positions the fins. The missile fins steer and stabilize the missile in flight. A fin servo system positions the fins. The fin servo system consists of hydraulic actuators and valves and an electrohy...
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Patriot was first introduced with a single missile type: the MIM-104A. This was the initial "Standard" missile (still known as "Standard" today). In Patriot's early days, the system was used exclusively as an anti-aircraft weapon, with no capability against ballistic missiles. This was remedied during the late 1980s wh...
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Patriot Advanced Capability (PAC-1), known today as the PAC-1 upgrade, was a software-only upgrade. The most significant aspects of this upgrade were changing the way the radar searched and the way the system defended its assets. Instead of searching low to the horizon, the top of the radar's search angle was lifted to...
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During the 1980s, Patriot was upgraded in relatively minor ways, mostly to its software. Most significant of these was a special upgrade to discriminate and intercept artillery rockets in the vein of the multiple rocket launcher, which was seen as a significant threat from North Korea. This feature has not been used in...
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During the late 1980s, tests began to indicate that, although Patriot was certainly capable of intercepting inbound ballistic missiles, it was questionable whether the MIM-104A/B missile was capable of destroying them reliably. This necessitated the introduction of the PAC-2 missile and system upgrade.
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For the system, the PAC-2 upgrade was similar to the PAC-1 upgrade. Radar search algorithms were further optimized, and the beam protocol while in "TBM search" was further modified. PAC-2 also saw Patriot's first major missile upgrade, with the introduction of the MIM-104C, or PAC-2 missile. This missile was optimized ...
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PAC-2 was first tested in 1987 and reached Army units in 1990, just in time for deployment to the Middle East for the Persian Gulf War. It was there that Patriot was first regarded as a successful ABM system and proof that ballistic missile defense was indeed possible. The complete study on its effectiveness remains cl...
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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.
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There were many more upgrades to PAC-2 systems throughout the 1990s and into the 21st century, again mostly centering on software. However, the PAC-2 missiles were modified significantly—four separate variants became known collectively as guidance enhanced missiles (GEM).
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The main upgrade to the original GEM missile was a new, faster proximity fused warhead. Tests had indicated that the fuse on the original PAC-2 missiles were detonating their warheads too late when engaging ballistic missiles with an extremely steep ingress, and as such it was necessary to shorten this fuse delay. The ...
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Just prior to OIF, it was decided to further upgrade the GEM and PAC-2 missiles. This upgrade program produced missiles known as the GEM-T and the GEM-C, the "T" designator referring to tactical ballistic missiles, and the "C" designator referring to cruise missiles. These missiles were both given a totally new nose se...
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In 2018, Raytheon upgraded GEM-T guidance system with solid-state gallium nitride (GAN) transmitters.
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The PAC-3 upgrade is a significant upgrade to nearly every aspect of the system. It took place in three stages deployed in 1995, 1996 and 2000, and units were designated Configuration 1, 2, or 3.
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New software update known as PDB 5 (PDB standing for "Post Deployment Build") was released in 1999 with initial support for Configuration-3 ground units and PAC-3 missiles. The system itself saw another upgrade of its WCC and the communication setup was given a complete overhaul. Due to this upgrade, PAC-3 operators ca...
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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 h...
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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 no...
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Lockheed Martin proposed an air-launched variant of the PAC-3 missile for use on the F-15C Eagle, the F-22 Raptor and the P-8A Poseidon.
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Lockheed Martin Missiles and Fire Control is the prime contractor on the PAC-3 Missile Segment Enhancement upgrade (MSE) to the Patriot air defense system which will make the missile more agile and extend its range by up to 50%. Patriot's PAC-3 MSE interceptor was selected as the primary interceptor for the new MEADS s...
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The PAC-3 Missile Segment upgrade consists of the PAC-3 MSE missile, a very agile hit-to-kill interceptor, the M903 Launching Station, 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 powerfu...
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The new M903 Launching System has a modular design capable of holding a total of 4 PAC-3 launching canisters (16 missiles), 12 PAC-3 MSE canisters (in 3 rows of 4), or 4 PAC-2 GEM canisters. It can also mix different missiles, such as 6 PAC-3 MSE canisters (in 3 rows of 2) and either two PAC-3 canisters (8 missiles) or...
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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 rada...
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In 2016 Raytheon announced that it had been authorised to bid SkyCeptor, a Stunner derivative, as part of its Polish Patriot bid. In March 2017 it was announced that Poland will acquire 8 Patriot batteries, with the majority of missiles deployed being SkyCeptors and only a small number of Patriot PAC-3 MSE missiles.
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PAC-3 system upgrades continue under the International Engineering Services Program (IESP) which includes all countries that rely on Patriot for integrated air and missile defense (as of 2022, United States of America, The Netherlands, Germany, Japan, Israel, Saudi Arabia, Kuwait, Taiwan, Greece, Spain, South Korea, Un...
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PDB 6 software update was released in 2004. This update allowed Configuration-3 to discriminate targets of all types, including anti-radiation missile carriers, helicopters, unmanned aerial vehicles, and cruise missiles.
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PDB 7 system upgrade was released in 2013; it improves radar search capabilities with a transition to digital signal processing, resulting in much better reliability and 30% longer range comparing to analog circuits. Processing power of the new command and control computer is higher by several orders of magnitude. Oper...
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The PAC-3 Missile Segment Enhancement (MSE) upgrade was fielded in 2015; it includes a new fin design and a more powerful rocket engine.
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In 2017, the AN/MPQ-65 radar was upgraded with active electronically scanned array (AESA) solid-state gallium nitride (GaN) transmitters in place of conventional traveling-wave tubes with a passive array of transmitters; the new radar has been redesignated AN/MPQ-65A. It includes a bolt-on replacement antenna array and...
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During 2018-2023, Raytheon Company will further enhance the system under a modernization task order from the United States Army, resulting in Configuration-3+. The order includes five annual, indefinite delivery/indefinite quantity task order awards with a total contract ceiling of more than $2.3 billion, funded by Pat...
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The PDB 8 upgrade released in 2018 includes redesigned fire control computers which support MSE capabilities, new weapons control computers with increased processing power, and software enhancements to radar search and target detection and identification which help reduce friendly fire incidents. The latest PDB 8.1 sof...
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In the U.S. Army, the Patriot System is designed around the battalion echelon. A Patriot battalion consists of a headquarters battery (which includes the Patriot ICC and its operators), a maintenance company, and between four and six "line batteries", which are the actual launching batteries that employ the Patriot sys...
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Once deployed, the system requires a crew of only three individuals to operate. The Tactical Control Officer (TCO), usually a lieutenant, is responsible for the operation of the system. The TCO is assisted by the Tactical Control Assistant (TCA). Communications are handled by the third crewmember, the communications sy...
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Patriot battalions prefer to operate in a centralized fashion, with the ICC controlling the launches of all of its subordinate launching batteries through the secure UHF PADIL communications network.
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The dismounted Patriot ICC (D-PICC) is a set of equipment which is composed of the same hardware as that at battalion level, but which distributes command and control over the launching batteries, which allows the batteries to disperse over a wider geographic area, with no loss of command and control. D-PICC is deployi...
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Following is the process a PAC-2 firing battery uses to engage a single target (an aircraft) with a single missile:
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Following is the process a PAC-3 firing battery uses to engage a single tactical ballistic missile with two PAC-3 missiles:
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Prior to the First Gulf War, ballistic missile defense was an unproven concept in war. During Operation Desert Storm, in addition to its anti-aircraft mission, Patriot was assigned to shoot down incoming Iraqi Scud or Al Hussein short range ballistic missiles launched at Israel and Saudi Arabia. The first combat use of...
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Throughout the war, Patriot missiles attempted engagement of over 40 hostile ballistic missiles. The success of these engagements, and in particular how many of them were real targets, is still controversial. Postwar video analysis of presumed interceptions by MIT professor Theodore Postol suggests that no Scud was act...
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On February 25, 1991, an Iraqi Al Hussein Scud missile hit the barracks in Dhahran, Saudi Arabia, killing 28 soldiers from the U.S. Army's 14th Quartermaster Detachment.
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A government investigation revealed that the failed intercept at Dhahran had been caused by a software error in the system's handling of timestamps. The Patriot missile battery at Dhahran had been in operation for 100 hours, by which time the system's internal clock had drifted by one-third of a second. Due to the miss...
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The radar system had successfully detected the Scud and predicted where to look for it next. However, the timestamps of the two radar pulses being compared were converted to floating point differently: one correctly, the other introducing an error proportionate to the operation time so far (100 hours) caused by the tru...
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Two weeks earlier, on February 11, 1991, the Israelis had identified the problem and informed the U.S. Army and the PATRIOT Project Office, the software manufacturer. As a stopgap measure, the Israelis had recommended rebooting the system's computers regularly. The manufacturer supplied updated software to the Army on ...
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There had previously been failures in the MIM-104 system at the Joint Defense Facility Nurrungar in Australia, which was charged with processing signals from satellite-based early launch detection systems.
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On February 15, 1991, President George H. W. Bush traveled to Raytheon's Patriot manufacturing plant in Andover, Massachusetts, during the Gulf War, he declared, the "Patriot is 41 for 42: 42 Scuds engaged, 41 intercepted!" The President's claimed success rate was thus over 97% to that point in the war.
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On April 7, 1992 Theodore Postol of the Massachusetts Institute of Technology, and Reuven Pedatzur of Tel Aviv University testified before a House Committee stating that, according to their independent analysis of video tapes, the Patriot system had a success rate of below 10%, and perhaps even a zero success rate. Als...
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In accordance with the standard firing doctrine on average four Patriots were launched at each incoming Scud in Saudi Arabia an average of three Patriots were fired. The large number of missiles fired suggests low confidence in individual missiles and a higher rate of successful interceptions was achieved through brute...
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According to the Zraket testimony there was a lack of high quality photographic equipment necessary to record the interceptions of targets. Therefore, Patriot crews recorded each launch on standard-definition videotape, which was insufficient for detailed analysis. Damage assessment teams videotaped the Scud debris tha...
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Both testimonies state that part of the problems stem from its original design as an anti-aircraft system. Patriot was designed with proximity fused warheads, which are designed to explode immediately prior to hitting a target spraying shrapnel out in a fan in front of the missile, either destroying or disabling the ta...
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In response to the testimonies and other evidence, the staff of the House Government Operations Subcommittee on Legislation and National Security reported, "The Patriot missile system was not the spectacular success in the Persian Gulf War that the American public was led to believe. There is little evidence to prove t...
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A "Fifth Estate" documentary quotes the former Israeli Defense Minister as saying the Israeli government was so dissatisfied with the performance of the missile defense, they were preparing their own military retaliation on Iraq regardless of U.S. objections. That response was canceled only with the ceasefire with Iraq...
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Patriot was deployed to Iraq a second time in 2003, this time to provide air and missile defense for the forces conducting Operation Iraqi Freedom (OIF). Patriot PAC-3, GEM, and GEM+ missiles both had a very high success rate, intercepting Al-Samoud 2 and Ababil-100 tactical ballistic missiles. However, no longer-range...
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The Israeli Air Defense Command operates MIM-104D Patriot (PAC-2/GEM+) batteries with Israeli upgrades. The Israel Defense Forces' designation for the Patriot weapon system is "Yahalom" (, "diamond").
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During Operation Protective Edge, Patriot batteries of the Israeli Air Defense Command intercepted and destroyed two unmanned aerial vehicles launched by Hamas. The interception of a Hamas drone on July 14, 2014, was the first time in the history of the Patriot system's use that it successfully intercepted an enemy air...
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On August 31, 2014, a Syrian unmanned aerial vehicle was shot down by an Israeli Air Defense Command MIM-104D Patriot missile near Quneitra, after it had penetrated Israeli-controlled airspace over the Israeli-occupied Golan Heights. Nearly a month later, on September 23, a Syrian Air Force Sukhoi Su-24 was shot down i...
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On July 17, 2016, two Israeli Patriot missiles missed an incoming drone launched from Syria, according to Russian media. Israeli Air Defence Command fired two Patriot missiles, but did not manage to destroy the target. Russia Today stated that the drone penetrated four kilometers into Israeli airspace, and flew back in...
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On April 27, 2017, another Syrian UAV was shot down by an Israeli Patriot battery which fired two missiles against the target. On September 19, 2017, a Hezbollah intelligence drone was shot down as it tried infiltrating Israel through the Golan border.
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On June 24, 2018, a single Israeli Patriot missile was fired toward a drone which was approaching Israel from Syria. The missile missed its target. The drone turned back to Syria.
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In a similar incident, in the afternoon of July 11, 2018, an Israeli Patriot missile shot down a drone which was approaching Israel from Syria.
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With a third engagement in a few days, in the afternoon of July 13, 2018, an Israeli Patriot missile shot down a drone which was approaching Israel from Syria.
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On July 24, 2018, an Israeli Patriot missile shot down a Syrian Sukhoi Su-22 fighter which had crossed into Israeli airspace.
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On June 6, 2015, a Patriot battery was used to shoot down a Scud missile, fired at Saudi Arabia by Houthi rebels in response to the Saudi Arabian-led intervention in Yemen. Another Scud was fired at an electricity station in Jizan province and intercepted by a Saudi Patriot on August26, 2015.
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Saudi Arabia claims that another long-range ballistic missile was fired toward Mecca and intercepted by a Saudi Patriot on October28, 2016. However; Houthi sources say that the missile's intended target was the air force base in King Abdulaziz International Airport in Jeddah, 65 km (40miles) north-west of Mecca.
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On March 25, 2018, another missile apparently fired from Yemen was intercepted by a Patriot missile over Riyadh. However missile experts via news agencies cast doubt of the effectiveness of the Saudi Arabian Patriot defense, according to the videos; one interceptor explodes just after launch and another does a "U turn"...
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On September 14, 2019, the six battalions of Patriot missile defense systems owned by Saudi Arabia failed to protect its oil facilities from multiple drones and suspected cruise missiles during the Abqaiq–Khurais attack.
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On May 7, 2020, the United States removed two of its four Patriot antimissile batteries from Saudi Arabia, which were securing its oil fields following easing of tensions with Iran. The batteries are said to be replaced by Saudi's own Patriot batteries instead.
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On 27 February 2021, a Patriot battery intercepted a ballistic missile fired by Houthis over Riyadh, as a Formula E race was being held on the outskirts of the city in Diriyah. The race was being attended by Crown Prince Mohammed bin Salman.
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According to Brigadier General Murad Turaiq, the commander of some of the Yemeni forces allied to the Saudi-led coalition currently fighting in Yemen, Patriot air defense systems deployed to Yemen by the United Arab Emirates (UAE) have successfully intercepted two ballistic missiles fired by Houthi forces. General Tura...
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On 16 July 2021, the US Army used a battery of Patriot missiles in the Talisman Sabre exercise in the Shoalwater Bay Training Area in Queensland, Australia. The US Army test fired Patriot PAC2 interceptor missiles and successfully intercepted target drones.
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On 9 March 2022, it was announced that the United States would be sending two Patriot air defense systems to Poland to "proactively counter any potential threat to U.S. and Allied forces and NATO territory", according to the U.S. European Command. These actions were taken as a result of Russia's invasion of Ukraine. Po...
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On 19 December, Ukraine President Zelenskyy has talked about negotiating personally with US President Biden over a potential transfer of Patriot missile systems. He said they offer “a (better) distance, radius of reflection, protection.” Ukrainian Foreign Minister Dmytro Kuleba said that this is the most difficult dipl...
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JAF operates three or four Patriot missile batteries, acquired from Germany. Batteries are in operational deployment.
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In August 2010, the US Defense Security Cooperation Agency announced that Kuwait had formally requested to buy 209 MIM-104E PAC-2 missiles. In August 2012, Kuwait purchased 60 MIM-104F PAC-3 missiles, along with four radars and 20 launchers.
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In November 2012, it was announced the export from the United States of 246 MIM-104E GEM-T and 786 PAC-3 missiles and related equipment. Declared operational in November 2018.
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The Romanian Air Force received its first system of Patriot surface-to-air missiles on Thursday, September 17, 2020.
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The government of Romania signed on November 29, 2017, an agreement to purchase seven Patriot Configuration 3 units, complete with radars, a control station, antennas, launching stations, and power plants.[102] Also included are 56 Patriot MIM-104E Guidance Enhanced Missile TBM (GEM-T) missiles and 168 Patriot Advanced...
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Sweden decided in competition with Aster 30 SAMP/T to request an offer for the Patriot system in November 2017 and in August 2018 an agreement was signed for 4 units and 12 launchers to form 2 battalions. No follow-up orders are to be made.
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The initial cost was to be around 10 billion SEK but the price is deemed much higher the granted funds for the sale is $3.2 Billion, known as "Luftvärnssystem 103" ("Anti-air system 103") in Swedish service, would be delivered in 2021 and 2022. The first Swedish troops were training on the system at Fort Sill in Decemb...
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In 2014, the United Arab Emirates closed a deal (nearly $4 billion) with Lockheed Martin and Raytheon to buy and operate the latest development of the PAC-3 system, as well as 288 of Lockheed's PAC-3 missiles, and 216 GEM-T missiles. The deal is part of the development of a national defense system to protect the Emirat...
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On March 28, 2018 the Ministry of National Defence signed the deal worth $4.75 billion for two Patriot Configuration 3+ batteries for deliveries in 2022. The purchase includes Northrop Grumman's Integrated Air and Missile Defense Battle Command System (IBCS) and four fire units equipped with four AN/MPQ-65 radars, 16 l...
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The North American Aviation P-51 Mustang is an American long-range, single-seat fighter and fighter-bomber used during World War II and the Korean War, among other conflicts. The Mustang was designed in April 1940 by a team headed by James H. Kindelberger of North American Aviation (NAA) in response to a requirement of...
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The Mustang was designed to use the Allison V-1710 engine, which had limited high-altitude performance in its earlier variants. The aircraft was first flown operationally by the RAF as a tactical-reconnaissance aircraft and fighter-bomber (Mustang Mk I). Replacing the Allison with a Rolls-Royce Merlin resulted in the P...
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From late 1943, P-51Bs and P-51Cs (supplemented by P-51Ds from mid-1944) were used by the USAAF's Eighth Air Force to escort bombers in raids over Germany, while the RAF's Second Tactical Air Force and the USAAF's Ninth Air Force used the Merlin-powered Mustangs as fighter-bombers, roles in which the Mustang helped ens...
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At the start of the Korean War, the Mustang, by then redesignated F-51, was the main fighter of the United States until jet fighters, including North American's F-86, took over this role; the Mustang then became a specialized fighter-bomber. Despite the advent of jet fighters, the Mustang remained in service with some ...
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In 1938, the British government established a purchasing commission in the United States, headed by Sir Henry Self. Self was given overall responsibility for RAF production, research, and development, and also served with Sir Wilfrid Freeman, the Air Member for Development and Production. Self also sat on the British A...
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North American Aviation (NAA) was already supplying its T-6 Texan (known in British service as the "Harvard") trainer to the RAF, but was otherwise underused. NAA President "Dutch" Kindelberger approached Self to sell a new medium bomber, the North American B-25 Mitchell. Instead, Self asked if NAA could manufacture P-...
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John Attwood of North American spent much time from January to April 1940 at the British Purchasing Commission's offices in New York discussing the British specifications of the proposed aircraft with British engineers. The discussions consisted of free-hand conceptual drawings of an aircraft with the British officials...
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The British Purchasing Commission stipulated armament of four .303 in (7.7 mm) machine guns (as used on the Tomahawk), a unit cost of no more than $40,000, and delivery of the first production aircraft by January 1941. In March 1940, 320 aircraft were ordered by Freeman, who had become the executive head of the Ministr...
https://en.wikipedia.org/wiki?curid=24710
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The NA-73X, which was designed by a team led by lead engineer Edgar Schmued, followed the best conventional practice of the era, designed for ease of mass manufacturing. The design included several new features. One was a wing designed using laminar flow airfoils, which were developed co-operatively by North American A...
https://en.wikipedia.org/wiki?curid=24710
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The other feature was a new cooling arrangement positioned aft (single ducted water and oil radiators assembly) that reduced the fuselage drag and effects on the wing. Later, after much development, they discovered that the cooling assembly could take advantage of the Meredith effect: in which heated air exited the rad...
https://en.wikipedia.org/wiki?curid=24710
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The prototype NA-73X was rolled out in September 1940, just 102 days after the order had been placed; it first flew on 26 October 1940, 149 days into the contract, an uncommonly short development period, even during the war. With test pilot Vance Breese at the controls, the prototype handled well and accommodated an im...
https://en.wikipedia.org/wiki?curid=24710
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While the USAAC could block any sales it considered detrimental to the interests of the US, the NA-73 was considered to be a special case because it had been designed at the behest of the British. In September 1940, a further 300 NA-73s were ordered by the MAP. To ensure uninterrupted delivery, Colonel Oliver P. Echols...
https://en.wikipedia.org/wiki?curid=24710