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Missile Defense Agency
The Missile Defense Agency (MDA) is a component of the Federal government of the United States, United States government's United States Department of Defense, Department of Defense responsible for developing a comprehensive Missile defense, defense against ballistic missiles. It had its origins in the Strategic Defense Initiative (SDI) which was established in 1983 by Ronald Reagan and which was headed by James A. Abrahamson, Lt. General James Alan Abrahamson. Under the Strategic Defense Initiative's Innovative Sciences and Technology Office headed by physicist and engineer Dr. James Ionson, the investment was predominantly made in basic research at national laboratories, universities, and in industry. These programs have continued to be key sources of funding for top research scientists in the fields of high-energy physics, advanced materials, nuclear research, supercomputing/computation, and many other critical science and engineering disciplines—funding which indirectly suppo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Strategic Defense Initiative
The Strategic Defense Initiative (SDI) was a proposed missile defense system intended to protect the United States from attack by ballistic nuclear missiles. The program was announced in 1983, by President Ronald Reagan. Reagan called for a system that would render nuclear weapons obsolete, and to end the doctrine of mutual assured destruction (MAD), which he described as a " suicide pact". Elements of the program reemerged in 2019 under the Space Development Agency (SDA). The Strategic Defense Initiative Organization (SDIO) was set up in 1984 within the US Department of Defense to oversee development. Advanced weapon concepts, including lasers, particle-beam weapons, and ground and space-based missile systems were studied, along with sensor, command and control, and computer systems needed to control a system consisting of hundreds of combat centers and satellites spanning the globe. The US held a significant advantage in advanced missile defense systems through decades ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aegis Ballistic Missile Defense System
The Aegis ballistic missile defense system (Aegis BMD or ABMD), also known as ''Sea-Based Midcourse'', is a Missile Defense Agency program under the United States Department of Defense developed to provide missile defense against short and intermediate-range ballistic missiles. The program is part of the United States national missile defense strategy and European NATO missile defense system. Aegis BMD is an expansion of the Aegis combat system deployed on warships, designed to intercept ballistic missiles in mid-course phase (i.e., after the rocket burn has completed but prior to reentry into the atmosphere). Aegis BMD-equipped vessels can engage potential threats using the Standard Missile 3 mid-course interceptors and the Standard Missile 2 and Standard Missile 6 terminal-phase interceptors.Aegis BMD web page , |
Intermediate-range Ballistic Missile
An intermediate-range ballistic missile (IRBM) is a ballistic missile with a range (aeronautics), range between (), categorized between a medium-range ballistic missile (MRBM) and an intercontinental ballistic missile (ICBM). Classifying ballistic missiles by range is done mostly for convenience. In principle there is little difference between a high-performance IRBM and a low-performance ICBM, because decreasing payload mass can increase the range over the ICBM threshold. The range definition used here is used within the U.S. Missile Defense Agency. History The progenitor for the IRBM was the Aggregate (rocket family)#A4b/A9, A4b rocket, winged for increased range and based on the famous V-2 rocket, V-2, Vergeltung, or "Reprisal", officially called Aggregate series, A4, rocket designed by Wernher von Braun. The V-2 was widely used by Nazi Germany at the end of World War II to bomb English and Belgian cities. The A4b was the prototype for the upper stage of the Aggregate (rock ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rodong-1
The Hwasong-7} () is a single- stage, mobile liquid propellant medium-range ballistic missile developed by North Korea. Developed in the mid-1980s, it is a scaled-up adaptation of the Soviet R-17 Elbrus missiles, more commonly known by its NATO reporting name "Scud". The inventory is estimated to be around 200–300 missiles. US Air Force National Air and Space Intelligence Center estimates that as of June 2017 fewer than 100 launchers were operationally deployed. It influenced the design of Pakistan's Ghauri-1 missile, as well as the Iranian Shahab-3. Overview It is believed North Korea obtained R-17 designs from Egypt, and possibly modified designs from China, allowing them to reverse-engineer them into a larger and longer-distance weapon. United States reconnaissance satellites first detected this type in May 1990 at the Musudan-ri test launch facility, in northeastern North Korea. In the same year, North Korea began producing Hwasong-7, and eight years later, Hwasong-7 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North Korea
North Korea, officially the Democratic People's Republic of Korea (DPRK), is a country in East Asia. It constitutes the northern half of the Korea, Korean Peninsula and borders China and Russia to the north at the Yalu River, Yalu (Amnok) and Tumen River, Tumen rivers, and South Korea to the south at the Korean Demilitarized Zone, Korean Demilitarized Zone (DMZ). The country's western border is formed by the Yellow Sea, while its eastern border is defined by the Sea of Japan. North Korea, like South Korea, claims to be the sole legitimate government of the entire peninsula and List of islands of North Korea, adjacent islands. Pyongyang is the capital and largest city. The Korean Peninsula was first inhabited as early as the Lower Paleolithic period. Its Gojoseon, first kingdom was noted in Chinese records in the early 7th century BCE. Following the unification of the Three Kingdoms of Korea into Unified Silla, Silla and Balhae in the late 7th century, Korea was ruled by the G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Speed Of Sound
The speed of sound is the distance travelled per unit of time by a sound wave as it propagates through an elasticity (solid mechanics), elastic medium. More simply, the speed of sound is how fast vibrations travel. At , the speed of sound in air is about , or in or one mile in . It depends strongly on temperature as well as the medium through which a sound wave is propagating. At , the speed of sound in dry air (sea level 14.7 psi) is about . The speed of sound in an ideal gas depends only on its temperature and composition. The speed has a weak dependence on frequency and pressure in dry air, deviating slightly from ideal behavior. In colloquial speech, ''speed of sound'' refers to the speed of sound waves in Earth's atmosphere, air. However, the speed of sound varies from substance to substance: typically, sound travels most slowly in gases, faster in liquids, and fastest in solids. For example, while sound travels at in air, it travels at in water (almost 4.3 times a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hypersonic Weapon
A hypersonic weapon is a weapon capable of maneuvering at hypersonic speed, defined as above Mach 5, or above 5 times the speed of sound. Below Mach 1, weapons would be characterized as subsonic, and above Mach 1, as supersonic. At extremely high speeds, air in the shock wave is ionized into a plasma, which makes control and communication difficult. Categorization There are three main categories of hypersonic weapon: # Boost-glide weapons, which glide and maneuver at hypersonic speeds following boosting by rocket propulsion. Examples include ballistic missiles fitted with hypersonic glide vehicle warheads. # Airbreathing weapons, typically hypersonic cruise missiles which maintain hypersonic speed by engines such as scramjets. # Gun-launched weapons, projectiles fired from either a conventional artillery or prospective railguns. Existing weapon systems such as ballistic missiles already travel at hypersonic speeds (and may actually reach their target sooner w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iran
Iran, officially the Islamic Republic of Iran (IRI) and also known as Persia, is a country in West Asia. It borders Iraq to the west, Turkey, Azerbaijan, and Armenia to the northwest, the Caspian Sea to the north, Turkmenistan to the northeast, Afghanistan to the east, Pakistan to the southeast, and the Gulf of Oman and the Persian Gulf to the south. With a Ethnicities in Iran, multi-ethnic population of over 92 million in an area of , Iran ranks 17th globally in both List of countries and dependencies by area, geographic size and List of countries and dependencies by population, population. It is the List of Asian countries by area, sixth-largest country entirely in Asia and one of the world's List of mountains in Iran, most mountainous countries. Officially an Islamic republic, Iran is divided into Regions of Iran, five regions with Provinces of Iran, 31 provinces. Tehran is the nation's Capital city, capital, List of cities in Iran by province, largest city and financial ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arrow-3 Jan-03-2013 (c)
The Arrow 3 or ''Hetz 3'' (, or ) is an Spaceflight, exoatmospheric Hypersonic speed, hypersonic anti-ballistic missile, jointly funded, developed and produced by Israel and the United States. Undertaken by Israel Aerospace Industries (IAI) and Boeing, it is overseen by the Ministry of Defense (Israel), Israeli Ministry of Defense's "''Homa''" (, , "Defensive wall, rampart") administration and the U.S. Missile Defense Agency. It provides exo-atmospheric interception of ballistic missiles (during the space-flight portion of their trajectory), including intercontinental ballistic missiles (ICBMs) carrying nuclear, chemical, biological or conventional warheads. With divert motor capability, its kill vehicle can switch directions dramatically. It can also be adapted for an anti-satellite role: it has sensors that can pivot 90 degrees in order to detect approaching satellites. The missile's reported flight range is up to . According to the chairman of the Israel Space Agency, Israel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
THAAD Launcher
Terminal High Altitude Area Defense (THAAD), formerly Theater High Altitude Area Defense, is an American anti-ballistic missile defense system designed to intercept and destroy short-, medium-, and intermediate-range ballistic missiles in their terminal phase (descent or reentry). The THAAD interceptor carries no warhead, instead relying on its kinetic energy of impact to destroy the incoming missile. THAAD was developed after the experience of Iraq's Scud missile attacks during the Gulf War in 1991. Originally a United States Army program, THAAD has come under the umbrella of the Missile Defense Agency. The Navy has a similar program, the sea-based Aegis Ballistic Missile Defense System, which also has a land component ("Aegis Ashore"). THAAD was originally scheduled for deployment in 2012, but initial deployment took place in May 2008. THAAD has been deployed in the United Arab Emirates (UAE), Israel, Romania, and South Korea. On 17 January 2022, THAAD made its first oper ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boeing YAL-1
The Boeing YAL-1 airborne laser testbed was a modified Boeing 747-400F with a megawatt-class chemical oxygen iodine laser (COIL) mounted inside. It was primarily designed to test its feasibility as a missile defense system to destroy tactical ballistic missiles (TBMs) while in boost phase. The aircraft was designated YAL-1A in 2004 by the U.S. Department of Defense. The YAL-1 with a low-power laser was test-fired in flight at an airborne target in 2007. A high-energy laser was used to intercept a test target in January 2010, and the following month, successfully destroyed two test missiles. Funding for the program was cut in 2010 and the program was canceled in December 2011. It made its final flight on February 14, 2012, to Davis–Monthan Air Force Base near Tucson, Arizona, to be kept in storage at the "boneyard" operated by the 309th Aerospace Maintenance and Regeneration Group. It was ultimately scrapped in September 2014 after all usable parts were removed. Develop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kinetic Energy Interceptor
The Kinetic Energy Interceptor (KEI) was a planned U.S. missile defense program whose goal was to design, develop, and deploy kinetic energy-based, mobile, ground and sea-launched missiles that could intercept and destroy enemy ballistic missiles during their boost, ascent and midcourse phases of flight. The KEI consisted of the Interceptor Component (kinetic projectile), the Mobile Launcher Component, and the Command, Control, Battle Management, and Communications (C2BMC) component. On 7 May 2009, the KEI program was canceled due primarily to financial reasons. First stage rocket motor tests There were five first-stage rocket motor tests planned to be carried out by Alliant Techsystems (ATK) in Promontory, Utah. The second test firing of a KEI first stage rocket motor was conducted on 14 June 2007. The static firing included a full duration burn and a demonstration of the thrust vector control nozzle. The fourth test firing of the first-stage rocket motor was completed on Nov ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
