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Missile Approach Warning
A missile approach warning system (MAW) is part of the avionics package on some military aircraft. A sensor detects attacking missiles. Its automatic warning cues the pilot to make a defensive maneuver and deploy the available countermeasures to disrupt missile tracking. Guided surface-to-air missile (SAM) systems were developed during World War II and began to make their presence felt in the 1950s. In response, electronic countermeasures (ECM) and flying tactics were developed to overcome them. They proved to be quite successful provided that a reliable and timely threat warning was given. The infrared seeking missile threat Analysis of aircraft losses due to enemy action since the 1960s shows that at least 70% of all losses were attributed to passive heat seeking i.e. Infrared (IR) guided missiles. This might be surprising given that radar guided SAM systems have longer engagement ranges, are faster, have higher maneuvering potential, carry larger warheads and are equipped ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
A Typhoon F2 Fighter Ignites Its Afterburners Whilst Taking Off From RAF Coningsby MOD 45147957
A, or a, is the first letter and the first vowel of the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is ''a'' (pronounced ), plural ''aes''. It is similar in shape to the Ancient Greek letter alpha, from which it derives. The uppercase version consists of the two slanting sides of a triangle, crossed in the middle by a horizontal bar. The lowercase version can be written in two forms: the double-storey a and single-storey ɑ. The latter is commonly used in handwriting and fonts based on it, especially fonts intended to be read by children, and is also found in italic type. In English grammar, " a", and its variant " an", are indefinite articles. History The earliest certain ancestor of "A" is aleph (also written 'aleph), the first letter of the Phoenician alphabet, which consisted entirely of consonants (for that reason, it is also called an abjad to distinguish it fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Infrared
Infrared (IR), sometimes called infrared light, is electromagnetic radiation (EMR) with wavelengths longer than those of visible light. It is therefore invisible to the human eye. IR is generally understood to encompass wavelengths from around 1 millimeter (300 GHz) to the nominal red edge of the visible spectrum, around 700 nanometers (430 THz). Longer IR wavelengths (30 μm-100 μm) are sometimes included as part of the terahertz radiation range. Almost all black-body radiation from objects near room temperature is at infrared wavelengths. As a form of electromagnetic radiation, IR propagates energy and momentum, exerts radiation pressure, and has properties corresponding to both those of a wave and of a particle, the photon. It was long known that fires emit invisible heat; in 1681 the pioneering experimenter Edme Mariotte showed that glass, though transparent to sunlight, obstructed radiant heat. In 1800 the astronomer Sir William Herschel discove ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AN/AAR-47 Missile Approach Warning System
The AN/AAR-47 Missile Warning System is a Missile Approach Warning system used on slow moving aircraft such as helicopters and military transport aircraft to notify the pilot of threats and to trigger the aircraft's countermeasures systems. Its main users are the U.S. Army, Navy and Air Force, but is also operated by other countries. Originally developed by Loral (now part of BAE Systems), and later dual-source procured from Loral Infrared & Imaging Systems and Honeywell Electro-Optics Div., both in Lexington, MA,Long Range Acquisition Estimates (FY 91 Base Year Projections) U.S. Government Printing Office, 1990, p. 41. it has been a product of Alliant Techsyst ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ultra Violet
Ultraviolet (UV) is a form of electromagnetic radiation with wavelength from 10 nm (with a corresponding frequency around 30 PHz) to 400 nm (750 THz), shorter than that of visible light, but longer than X-rays. UV radiation is present in sunlight, and constitutes about 10% of the total electromagnetic radiation output from the Sun. It is also produced by electric arcs and specialized lights, such as mercury-vapor lamps, tanning lamps, and black lights. Although long-wavelength ultraviolet is not considered an ionizing radiation because its photons lack the energy to ionize atoms, it can cause chemical reactions and causes many substances to glow or fluoresce. Consequently, the chemical and biological effects of UV are greater than simple heating effects, and many practical applications of UV radiation derive from its interactions with organic molecules. Short-wave ultraviolet light damages DNA and sterilizes surfaces with which it comes into contact. For h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Elisra
Elisra Group is an Israeli manufacturer of high-tech electronic devices, mainly but not exclusively for military use. It makes equipment for electronic communication and surveillance, missile tracking and controlling systems, radar and lidar equipment. The group is composed of three companies: Elisra Electronic Systems, Tadiran Electronic Systems Ltd. and Tadiran Spectralink Ltd. History Previously Elisra was owned 70% by Elbit Systems and 30% by Israel Aerospace Industries (IAI); however, Elbit later acquired IAI's share and Elisra is now a wholly owned subsidiary of Elbit. Elisra Electronic Systems supplies missile warning systems, active jammer systems, laser and IR detection systems for several kinds of aircraft and ground vessels of the Israel Defense Forces (IDF). Tadiran Electronic Systems manufactured the Tadiran Mastiff reconnaissance UAV, used by the IDF during the 1982 Lebanon War The 1982 Lebanon War, dubbed Operation Peace for Galilee ( he, מבצע של� ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alliant Techsystems
Alliant Techsystems Inc. (ATK) was an American aerospace, defense, and sporting goods company with its headquarters in Arlington County, Virginia, in the United States. The company operated in 22 states, Puerto Rico, and other countries. ATK's revenue in the 2014 fiscal year was about US$4.78 billion. On April 29, 2014, ATK announced that it would spin off its Sporting Group and merge its Aerospace and Defense Groups with Orbital Sciences Corporation. The spinoff of the Sporting Group to create Vista Outdoor and the merger leading to the creation of Orbital ATK were completed on February 9, 2015; both companies began operations as separate entities on February 20, 2015. History ATK was launched as an independent company in 1990, when Honeywell spun off its defense businesses to shareholders. The former Honeywell businesses had supplied defense products and systems to the U.S. and its allies for 50 years, including the first electronic autopilot for B-17 aircraft's bombing mi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hensoldt
Hensoldt AG ''(HENSOLDT)'' is a multinational corporation headquartered in Germany which focuses on sensor technologies for protection and surveillance missions in the defence, security and aerospace sectors. The main product areas are radar, optoelectronics and avionics. Hensoldt’s main office is in Taufkirchen near Munich, Germany. On 25 September 2020, HENSOLDT AG was listed in the Prime Standard of the Frankfurt Stock Exchange at an issue price of 12.00 euros. Based on the issue price, the market capitalisation amounted to 1.26 billion euros. History The company originated from the electronics business unit of the defence division of the Airbus Group. At the end of February 2017, Airbus sold this business unit to the US financial investor KKR for 1.1 billion euros.Arno Schuetze and Sabine Siebold (September 5, 2019)KKR to sell or float German defence supplier Hensoldt: sources''Reuters''. Since December 2020, Federal Republic of Germany holds a minimum share, which is ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BAE Systems Electronics, Intelligence & Support
BAE Systems Electronic Systems (ES) is one of three operating groups of BAE Systems Inc., the North American subsidiary of the British global defence contractor BAE Systems PLC. History BAE Systems acquired Lockheed Martin Aerospace Electronic Systems (AES) and Lockheed Martin Control Systems in 2000. BAE Systems Electronic Systems was formed in June 2005 by an internal reorganisation of these businesses. Lockheed had identified AES as a candidate for disposal following a strategic review in 1999. BAE Systems agreed to acquire the group in July and completed its acquisition of AES on 27 November 2000. The group encompassed Sanders Associates, Fairchild Systems and Lockheed Martin Space Electronics & Communications. The purchase of this group by BAE has been described as "precedent setting" given the advanced and classified nature of many of that company's products. In August 2004 BAE acquired Boeing Commercial Electronics for $66 million (£36m). This was an Irving, Texas-b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Northrop Grumman
Northrop Grumman Corporation is an American multinational aerospace and defense technology company. With 90,000 employees and an annual revenue in excess of $30 billion, it is one of the world's largest weapons manufacturers and military technology providers. The firm ranks on the 2022 ''Fortune'' 500 list of America's largest corporations. Northrop Grumman and its industry partners have won the Collier Trophy eight times, most recently for developing the X-47B, the first unmanned, autonomous air system to operate from an aircraft carrier. Northrop Grumman currently leads the development of the B-21 Raider, a long-range, stealth strategic bomber that can drop conventional and nuclear weapons; it will replace Northrop's own B-2 Spirit, the world's only known stealth bomber. Among its other current projects are development and production of the James Webb Space Telescope, an orbiting observatory launched in 2021, and production of the solid rocket boosters for NASA's Sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SELEX Sistemi Integrati
SELEX Sistemi Integrati S.p.A. was an aerospace, defence and security-related electronics manufacturing company headquartered in Rome, Italy and a wholly owned subsidiary of Finmeccanica. It designed and developed systems for homeland security; systems and radar sensors for air defence, battlefield management, naval warfare, coastal and maritime surveillance; air traffic control; and turn-key airport solutions. The company had around 4,500 employees. On 1 January 2013, it merged with its sister companies SELEX Galileo and SELEX Elsag to form Selex ES. History In 1951, Finmeccanica and the United States-based company Raytheon formed Microlambda, a joint venture based in Fusaro near Naples, operating in the field of applied electronics and producing radar systems under licence for land and naval applications. In 1956, a new company, SINDEL, was established with capital provided by Edison (hydroelectric and gas distribution). Several engineers and technicians from Microlambda mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thales Group
Thales Group () is a French multinational company that designs, develops and manufactures electrical systems as well as devices and equipment for the aerospace, defence, transportation and security sectors. The company is headquartered in Paris' business district, La Défense, and its stock is listed on the Euronext Paris. Having been known as Thomson-CSF since its foundation in 1968, the company was rebranded ''Thales'' (named after the Greek philosopher Thales and pronounced , reflecting its pronunciation in French) in December 2000. A communication audit, launched in spring that year, highlighted Thomson-CSF's image deficit, particularly among the young French graduates it was seeking to recruit. The wish to liven up its image as well as the expansion of its business worldwide were cited among the reasons for the change. Thales is partially owned by the French State and operates in more than 56 countries. It had 80,000 employees and generated €18.4 billion in revenues in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solar-blind Technology
Solar-blind technology is a set of technologies to produce images without interference from the Sun. This is done by using wavelengths of ultraviolet light that are totally absorbed by the ozone layer, yet are transmitted in the Earth's atmosphere. Wavelengths from 240 to 280 nm are completely absorbed by the ozone layer. Elements of this technology are ultraviolet light sources, ultraviolet image detectors, and filters that only transmit the range of wavelengths that are blocked by ozone. A system will also have a signal processing system, and a way to display the results (image). Ultraviolet sources Ultraviolet illumination can be produced from longer wavelengths using non-linear optical materials. These can be a second harmonic generator. They must have a suitable birefringence in order to phase match the output frequency doubled UV light. One compound commercially used is L-arginine phosphate monohydrate known as LAP. Research is underway for substances that are very non-li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
