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Active Electronically Scanned Array
An active electronically scanned array (AESA) is a type of phased array antenna, which is a computer-controlled antenna array 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 matri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ILA Berlin 2012 PD 193-2
Ila or ILA may refer to: Government * Ila Detention and Security Prison, a prison in Bærum, Norway * Israel Land Administration * Israel Land Authority, the successor agency to the Israel Land Administration Organizations * Idaho Library Association * Illinois Library Association * Immersive Light and Art, an arts organisation in Adelaide, Australia * Indian Laser Association * Indian Library Association * Institute of Landscape Architects, in UK * Institute for Legislative Action (NRA-ILA), political lobbying arm of the National Rifle Association of America * International Law Association * International Linguistic Association * International Longevity Alliance, an international nonprofit organization promoting life extension * International Longshoremen's Association, North American labor union * Iowa Library Association Places * Ila, China, former name of Huiyuan in Xinjiang * Ila, Georgia, a community in United States * Ila, Osun, a local government area in Nigeria * Ila, Tr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beamforming
Beamforming or spatial filtering is a signal processing technique used in sensor arrays for directional signal transmission or reception. This is achieved by combining elements in an antenna array in such a way that signals at particular angles experience constructive interference while others experience destructive interference. Beamforming can be used at both the transmitting and receiving ends in order to achieve spatial selectivity. The improvement compared with omnidirectional reception/transmission is known as the directivity of the array. Beamforming can be used for radio or sound waves. It has found numerous applications in radar, sonar, seismology, wireless communications, radio astronomy, acoustics and biomedicine. Adaptive beamforming is used to detect and estimate the signal of interest at the output of a sensor array by means of optimal (e.g. least-squares) spatial filtering and interference rejection. Techniques To change the directionality of the array when ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
EL/M-2075
The EL/M-2075 Phalcon is an airborne early warning and control (AEW&C) active electronically scanned array radar system developed by Israel Aerospace Industries (IAI) and Elta Electronics Industries of Israel. Its primary objective is to provide intelligence to maintain air superiority and conduct surveillance. It was surpassed by newer versions—the EL/W-2085 and the EL/W-2090. Design and features The EL/M-2075 is a solid-state L-band conformal array radar system for use on a Boeing 707 and other aircraft. Phalcon, as the complete AEW mission suite is referred to, is intended for airborne early warning, tactical surveillance of airborne and surface targets and intelligence gathering. It also integrates the command and control capabilities needed to employ this information. The system uses six panels of phased-array elements: two on each side of the fuselage, one in an enlarged nosecone and one under the tail. Each array consists of 768 liquid-cooled, solid-state transmitting ... [...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 narrow beam radars, targeting radars, tracking 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 se ... [...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 system that uses radio waves to determine the distance ('' ranging''), direction ( azimuth and elevation angles), and radial velocity of objects relative to the site. It is a radiodetermination method used to detect and track ... 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 {{Naval combat systems 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 are the military forces of Japan. Established in 1954, the JSDF comprises 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. Since the end of the Cold War, and particularly into the 21st century, increased tensions with North Korea, China, and Russia have reignited debate over the status of the JSDF and their relationship to Japanese society. The JSDF have prioritized greater cooperation and partnership with Australia, India, Taiwan, South Korea, Singapore, the United Kingdom, the United States, and NATO, as well as acquiring new equipment and hardware. History Establishment Japan surrendered to the Allied Powers on 15 August 1945, and officially exchanged instruments of surrender in Tokyo Bay on 2 September, after which Japan underwent a U.S.-led military occupation for seven years, until 28 April 1952. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kura Test Range
Kura Missile Test Range (), 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 Plesetsk Cosmodrome, and consequently is par ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sary Shagan
Sary Shagan (; ) 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 defence 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, with the latest known launch on 2 December 2022. The town of Sary Shagan was a closed city until 2005. The administrative centre, 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 State Research and Testing Site No. 10 USSR Ministry of D ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
5N65 Radar
The 5N65 radar (, NATO: Flat Twin, also RSN-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 1971, at site 53 (). The radar was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kwajalein Atoll
Kwajalein Atoll (; Marshallese language, Marshallese: ) is part of the Marshall Islands, 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, 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 ''German cruiser Prinz Eugen, 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 camera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
