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Active Electronically Steered Array
An active electronically scanned array (AESA) is a type of phased array antenna, which is a computer-controlled array antenna in which the beam of radio waves can be electronically steered to point in different directions without moving the antenna. In the AESA, each antenna element is connected to a small solid-state transmit/receive module (TRM) under the control of a computer, which performs the functions of a transmitter and/or receiver for the antenna. This contrasts with a passive electronically scanned array (PESA), in which all the antenna elements are connected to a single transmitter and/or receiver through phase shifters under the control of the computer. AESA's main use is in radar, and these are known as active phased array radar (APAR). The AESA is a more advanced, sophisticated, second-generation of the original PESA phased array technology. PESAs can only emit a single beam of radio waves at a single frequency at a time. The PESA must utilize a Butler matrix ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nike-X
Nike-X was an anti-ballistic missile (ABM) system designed in the 1960s by the United States Army to protect major cities in the United States from attacks by the Soviet Union's intercontinental ballistic missile (ICBM) fleet during the Cold War. The X in the name referred to its experimental basis and was supposed to be replaced by a more appropriate name when the system was put into production. This never came to pass; in 1967 the Nike-X program was canceled and replaced by a much lighter defense system known as Sentinel. The Nike-X system was developed in response to limitations of the earlier Nike Zeus system. Zeus' radars could only track single targets, and it was calculated that a salvo of only four ICBMs would have a 90% chance of hitting a Zeus base. The attacker could also use radar reflectors or high-altitude nuclear explosions to obscure the warheads until they were too close to attack, making a single-warhead attack highly likely to succeed. Zeus would have been us ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asagiri-class Destroyer
The is a class of destroyer, serving with the Japan Maritime Self-Defense Force (JMSDF). It was the second class of first-generation general-purpose destroyers of the JMSDF. Background The JMSDF started construction of a since FY1977. This was the first class of under the eight ships / eight helicopters concept. In this concept, each flotilla would be composed of one helicopter destroyer (DDH), five general-purpose destroyers (DD), and two guided-missile destroyers (DDG). However, due to constraints such as budget, the design of the ''Hatsuyuki'' class was compelled to compromise in terms of C4I function, resistance, and durability. Thus, destroyers to be built after FY1983, ''Asagiri'' class were changed to an evolved design with expanded hull and enhanced equipment. Design The hull is an enlarged type of ''Hatsuyuki'' class, and the hull form is of the shelter deck style. Also, as the latter batch of the ''Hatsuyuki'' class, the upper structure is made of steel, but since it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fire-control Radar
A fire-control radar (FCR) is a radar that is designed specifically to provide information (mainly target azimuth, elevation, range and range rate) to a fire-control system in order to direct weapons such that they hit a target. They are sometimes known as targeting radars, or in the UK, gun-laying radars. If the radar is used to guide a missile, it is often known as a target illuminator or illuminator radar. A typical fire-control radar emits a narrow, intense beam of radio waves to ensure accurate tracking information and to minimize the chance of losing track of the target. This makes them less suitable for initial detection of the target, and FCRs are often partnered with a medium-range search radar to fill this role. In British terminology, these medium-range systems were known as tactical control radars. Most modern radars have a track-while-scan capability, enabling them to function simultaneously as both fire-control radar and search radar. This works either by havin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
OPS-24
The OPS-24 is a shipborne three-dimensional air search radar adopting active electronically scanned array (AESA) technology. OPS-24 was developed by the Technical Research and Development Institute (TRDI) of the Ministry of Defence, and manufactured by the Mitsubishi Electric. It is the first AESA radar Radar is a detection system that uses radio waves to determine the distance (''ranging''), angle, and radial velocity of objects relative to the site. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, ... employed on an operational warship, introduced on the , the first ship of the latter batch of the , launched in 1988. It is also being used on the ''Murasame'' and s. References {{Reflist Military radars of Japan Naval radars Mitsubishi_Electric_products,_services_and_standards Japan Maritime Self-Defense Force Military equipment introduced in the 1980s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japan Self-Defense Forces
The Japan Self-Defense Forces ( ja, 自衛隊, Jieitai; abbreviated JSDF), also informally known as the Japanese Armed Forces, are the unified ''de facto''Since Article 9 of the Japanese Constitution outlaws the formation of armed forces, the JSDF cannot be considered a fully-fledged military force. military forces of Japan established in 1954. The self-defence forces consists of the Japan Ground Self-Defense Force, the Japan Maritime Self-Defense Force, and the Japan Air Self-Defense Force. They are controlled by the Ministry of Defense, with the Prime Minister as commander-in-chief. In recent years, the JSDF has engaged in international peacekeeping operations with the United Nations. Tensions with North Korea have reignited debate over the status of the JSDF and its relationship to Japanese society. Since 2010, the JSDF has refocused from countering the former Soviet Union to the People's Republic of China, also since 2022 Russian invasion of Ukraine the JSDF also cons ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kura Test Range
Kura Missile Test Range ( rus, Ракетный полигон Кура́), originally known as ''Kama'', is a Russian intercontinental ballistic missile impact area located in northern Kamchatka Krai in the Russian Far East. It is the destination for ballistic missiles which are test fired from other centers, and was chosen due to its remoteness and distance. It is northeast of the settlement of Klyuchi and the military townlet is called Klyuchi-1, after the nearest settlement. History The range was developed beginning in 1955 and was operational in 1957. The first impact occurred on 21 August 1957, and was followed by 136 impacts through 1964.''SOVIET ANTIBALLISTIC MISSILE ACTIVITY AT KAMCHATKA'', 18 October 1965 (Top Secret, declassified 11 August 2003), Central Intelligence Agency, Washington D.C., 1965. Although the range is a test site for intercontinental ballistic missiles, which are controlled by the Russian Strategic Rocket Forces, the range is administratively under ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sary Shagan
Sary Shagan ( rus, Сары-Шаган; kz, Сарышаған) is an anti-ballistic missile testing range located in Kazakhstan. On 17 August 1956 the Council of Ministers of the Soviet Union authorized plans for an experimental facility for missile defense located at Sary Shagan, on the west bank of Lake Balkhash. The first missile launched from the facility was a V-1000 on 16 October 1958, but the facilities for full-scale testing were not ready until 1961. Sary Shagan remains in use to this day, with the latest known launch on 2 December 2022. The town of Sary Shagan was a closed city until 2005. The administrative center, Priozersk remained a closed city. The length of the site is 480 km. The Sary Shagan range was the intended landing site for the sample return canister of the Russian Fobos-Grunt mission. History The first and only one in Eurasia test site for the development and testing of anti-missile weapons. In USSR, the official name of the test site was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
5N65 Radar
The 5N65 radar ( rus, РЛС 5Н65, NATO: Flat Twin, also RSN-225 ( rus, РСН-225)) was a Soviet military phased array radar initially designed for the S-225 anti-ballistic missile system which was never commissioned. The radar was later installed near the Kura Test Range in Kamchatka in the Russian Far East as a part of 5K17 (GRAU index) tracking and measuring system and was demolished in 2006. S-225 The radar was built as part of the S-225 anti-ballistic missile system (codename of the R&D work: Azov; US name: ABM-X-3), a marginally mobile system designed to defend high status targets against attack by ballistic missiles. Work started on the system in the early 1960s and S-225 was one of three competing systems; A-35 (the one chosen) and "Saturn" were the others. S-225 was designed by A.A. Raspletin, who worked in special design bureau OKB-31, of KB-1 design bureau. The first design was done in 1964 and the first prototype of the system was installed in Sary Shagan in 197 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kwajalein Atoll
Kwajalein Atoll (; Marshallese: ) is part of the Republic of the Marshall Islands (RMI). The southernmost and largest island in the atoll is named Kwajalein Island, which its majority English-speaking residents (about 1,000 mostly U.S. civilian personnel) often use the shortened name, Kwaj . The total land area of the atoll amounts to just over . It lies in the Ralik Chain, southwest of Honolulu, Hawaii. The US Navy has hosted a naval base on Kwajalein Island since World War II. It was the final resting place of the German cruiser '' Prinz Eugen'' after it survived the Operation Crossroads nuclear test in 1946. In the late 1950s, the US Army took over the base as part of their Nike Zeus anti-ballistic missile efforts, and since then the atoll has been widely used for missile tests of all sorts. Today it is part of the Ronald Reagan Ballistic Missile Defense Test Site, with various radars, tracking cameras, missile launchers, and many support systems spread across many island ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sentinel Program
Sentinel was a proposed US Army anti-ballistic missile (ABM) system designed to provide a light layer of protection over the entire United States, able to defend against small ICBM strikes like those expected from China, or accidental launches from the USSR or other states. The system would have seventeen bases, each centered on its Missile Site Radar (MSR) and a computerized command center buried below it. The system was supported by a string of five long-range Perimeter Acquisition Radars (PAR) spread across the US/Canada border area and another in Alaska. The primary weapon was the long-range Spartan missile, with short range Sprint missiles providing additional protection near US ICBM fields and PAR sites. The system would initially have a total of 480 Spartan and 192 Sprint missiles. Sentinel was a response to the rapidly rising costs of the earlier Nike-X concept. Nike-X was designed to handle full-out attacks by the Soviet ICBM force of thousands of missiles, stockpilin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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