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Secondary Surveillance Radar
Secondary surveillance radar (SSR)''Secondary Surveillance Radar'', Stevens M.C. Artech House, is a radar system used in air traffic control (ATC), that unlike primary radar systems that measure the bearing and distance of targets using the detected reflections of radio signals, relies on targets equipped with a radar Transponder (aviation), transponder, that reply to each interrogation signal by transmitting encoded data such as an identity code, the aircraft's altitude and further information depending on its chosen mode. SSR is based on the military identification friend or foe (IFF) technology originally developed during World War II; therefore, the two systems are still compatible. Monopulse secondary surveillance radar (MSSR), Secondary surveillance radar#Mode S, Mode S, TCAS and ADS-B are similar modern methods of secondary surveillance. Overview Primary radar The rapid World War II, wartime development of radar had obvious applications for air traffic control (ATC) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ssr Coelpin
SSR may refer to: Businesses, entertainment and products * Solid State Records, a Christian record label * Chevrolet SSR, a Chevrolet small truck * Disney's Saratoga Springs Resort & Spa * Small Screen Rendering, a technology part of Opera Mini * ''Sonic and the Secret Rings'', a 2007 platform video game * ''Stephen's Sausage Roll'', a 2016 puzzle video game * Sirius Satellite Radio, a satellite radio service operating in North America * Strategic Scientific Reserve, a fictional organization in Marvel Comics and precursor to the fictional organization S.H.I.E.L.D. * SSR Wheels, a Japanese wheel manufacturer Geographical locations * Soviet Socialist Republic, see Republics of the Soviet Union * Slovak Soviet Republic (1919), a very short-lived communist state in south and eastern Slovakia * Slovak Socialist Republic, the official name of Slovakia from 1969 to 1990 *Second Spanish Republic Railways * Sabah State Railway, a railway in Malaysia * Southern Shorthaul Railroad, an Aus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Altimeter Setting
Altimeter setting is the value of the atmospheric pressure used to adjust the scale of a pressure altimeter so that it indicates the height of an aircraft above a known reference surface. This reference can be the mean sea level pressure ( QNH), the pressure at a nearby surface airport (QFE), or the " standard pressure level" of which gives pressure altitude and is used to maintain one of the standard flight levels. The setting of a sensitive pressure altimeter is shown in thKollsman window The QNH altimeter setting is one of the data included in METAR messages. An alternative setting is QFE or SPS/STD: *QNH - is the barometric altimeter setting that causes an altimeter to read aircraft elevation above mean sea level - ''altitude'' ( AMSL - above mean sea level) in ISA temperature conditions in the vicinity of the airfield that reported the QNH value. *QFE - is the barometric altimeter setting that causes an altimeter to read zero when at the reference datum of a particular a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cyclic Redundancy Check
A cyclic redundancy check (CRC) is an error-detecting code commonly used in digital networks and storage devices to detect accidental changes to digital data. Blocks of data entering these systems get a short ''check value'' attached, based on the remainder of a polynomial division of their contents. On retrieval, the calculation is repeated and, in the event the check values do not match, corrective action can be taken against data corruption. CRCs can be used for error correction (see bitfilters). CRCs are so called because the ''check'' (data verification) value is a ''redundancy'' (it expands the message without adding information) and the algorithm is based on ''cyclic'' codes. CRCs are popular because they are simple to implement in binary hardware, easy to analyze mathematically, and particularly good at detecting common errors caused by noise in transmission channels. Because the check value has a fixed length, the function that generates it is occasionally used as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MIT Lincoln Laboratory
The MIT Lincoln Laboratory, located in Lexington, Massachusetts, is a United States Department of Defense federally funded research and development center chartered to apply advanced technology to problems of national security. Research and development activities focus on long-term technology development as well as rapid system prototyping and demonstration. Its core competencies are in sensors, integrated sensing, signal processing for information extraction, decision-making support, and communications. These efforts are aligned within ten mission areas. The laboratory also maintains several field sites around the world. The laboratory transfers much of its advanced technology to government agencies, industry, and academia, and has launched more than 100 start-ups. History Origins At the urging of the United States Air Force, the Lincoln Laboratory was created in 1951 at the Massachusetts Institute of Technology (MIT) as part of an effort to improve the U.S. air defense syste ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fade Regions
Fade or Fading may refer to: Science and technology * Fading, a loss of signal strength at a radio receiver * Color fade, the alteration of color by light * Fade (audio engineering), a gradual change in sound volume * Brake fade, in vehicle braking systems, a reduction in stopping power after repeated use * FADE, a type of anti-piracy software Arts and entertainment Film and television * Fade (filmmaking), a cinematographic technique * ''Fade'' (2008 film), a film starring Sarah Lassez, Michael T. Weiss, and Devon Odessa * ''The Fades'' (TV series), a 2011 UK supernatural drama series * "Fade" (''Smallville''), a television episode Literature * ''Fade'' (novel), a 1988 novel by Robert Cormier * ''The Fade'', a 2007 novel by Chris Wooding * Fade, a humanoid race of monsters from Robert Jordan's 1990-2013 fantasy novel series The Wheel of Time. Music * Dynamics (music), the variation or change in volume in a piece of music Performers * Fade (band), a Japanese alternative ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antenna (hogtrough)
Antenna (: antennas or antennae) most commonly refers to: * Antenna (zoology), one of a pair of appendages used for sensing in arthropods * Antenna (radio), or aerial, an electronic device that transmits, receives, or detects radio waves ** Antenna types Antenna, antennas, antennae or antena may also refer to: Broadcasting companies and channels * Antenna Group or ANT1 Group, a media company and broadcaster in Greece * Antenna TV, an American TV channel * Antena 1 (other), several channels * Antena 2 (other), several channels * Antena 3 (other), several channels * Antena Internațional, an international TV channel for Romanians * Antena Radio Jelah, Bosnian radio station * Antena Sarajevo, Bosnian radio station * Antena Stars, a Romanian television channel * Radio Antena M, Montenegrin radio station Film and television * ''Antenna'' (film), a 1970 Dutch short film * ''Antenna'' (TV series), a Australian TV program for children * Antenna ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mode A & C Reply
Mode ( meaning "manner, tune, measure, due measure, rhythm, melody") may refer to: Arts and entertainment * MO''D''E (magazine), a defunct U.S. women's fashion magazine * ''Mode'' magazine, a fictional fashion magazine which is the setting for the ABC series ''Ugly Betty'' * ''Mode'' (video game), a 1996 video game * Mode Records, a record label * Mode Media, a defunct digital media company * ''Mode'' (book series), a quartet of novels by Piers Anthony * Modern Organization for Dance Evolvement, known as MODE, a 1970s modern dance organisation in New York * ''Mode'', a defunct Indonesian women's magazine Music * Mode (music), a system of musical tonality involving a type of scale coupled with a set of characteristic melodic behaviors ** Modus (medieval music) *** Gregorian mode, a system of modes used in Gregorian chant (as opposed to ancient Greek modes or Byzantine octoechos) * "Mode", a song by PRhyme from the 2015 soundtrack '' Southpaw: Music from and Inspired by th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sum & Control
Sum most commonly means the total of two or more numbers added together; see addition. Sum can also refer to: Mathematics * Sum (category theory), the generic concept of summation in mathematics * Sum, the result of summation, the addition of a sequence of numbers * 3SUM, a term from computational complexity theory * Band sum, a way of connecting mathematical knots * Connected sum, a way of gluing manifolds * Digit sum, in number theory * Direct sum, a combination of algebraic objects ** Direct sum of groups ** Direct sum of modules ** Direct sum of permutations ** Direct sum of topological groups * Einstein summation, a way of contracting tensor indices * Empty sum, a sum with no terms * Indefinite sum, the inverse of a finite difference * Kronecker sum, an operation considered a kind of addition for matrices * Matrix addition, in linear algebra * Minkowski addition, a sum of two subsets of a vector space * Power sum symmetric polynomial, in commutative algebra * Prefix s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Interrogation
Interrogation (also called questioning) is interviewing as commonly employed by law enforcement officers, military personnel, intelligence agencies, organized crime syndicates, and terrorist organizations with the goal of eliciting useful information, particularly information related to suspected crime. Interrogation may involve a diverse array of techniques, ranging from developing a congenial rapport with the subject to torture. Techniques Deception Deception can form an important part of effective interrogation. In the United States, there is no law or regulation that forbids the interrogator from lying about the strength of their case, from making misleading statements or from implying that the interviewee has already been implicated in the crime by someone else. See case law on trickery and deception (''Frazier v. Cupp''). In 2021, Illinois became the first state to ban police officers from lying to minors during interrogations. As noted above, traditionally the issue of de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Icon (computing)
In computing, an icon is a pictogram or ideogram displayed on a computer screen in order to help the user navigate a computer system. It can serve as an electronic hyperlink or file shortcut to access the program or data. The user can activate an icon using a mouse, pointer, finger, or voice commands. Their placement on the screen, also in relation to other icons, may provide further information to the user about their usage. In activating an icon, the user can move directly into and out of the identified function without knowing anything further about the location or requirements of the file or code. Icons as parts of the graphical user interface of a computer system, in conjunction with window (computing), windows, Menu (computing), menus and a pointing device (mouse), belong to the much larger topic of the history of the graphical user interface that has largely supplanted the text-based interface for casual use. Overview The computing definition of "icon" can include three ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flight Level
In aviation, a flight level (FL) is an aircraft's altitude as determined by a pressure altimeter using the International Standard Atmosphere. It is expressed in hundreds of feet or metres. The altimeter setting used is the ISA sea level pressure of 1013 hPa or 29.92 inHg. The actual surface pressure will vary from this at different locations and times. Therefore, by using a standard pressure setting, every aircraft has the same altimeter setting, and vertical clearance can be maintained during cruise flight. Background Flight levels are used to ensure safe vertical separation between aircraft. Historically, altitude has been measured using an altimeter, essentially a calibrated barometer. An altimeter measures ambient air pressure, which decreases with increasing altitude following the barometric formula. It displays the corresponding altitude. If aircraft altimeters were not calibrated consistently, then two aircraft could be flying at the same altitude even thou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ARINC
Aeronautical Radio, Incorporated (ARINC), established in 1929, was a major provider of transport communications and systems engineering solutions for eight industries: aviation, airports, defense, government, healthcare, networks, security, and transportation. ARINC had installed computer data networks in police cars and railroad cars and also maintains the standards for line-replaceable units. ARINC was formerly headquartered in Annapolis, Maryland, and had two regional headquarters in London, established in 1999 to serve the Europe, Middle East, and Africa region, and Singapore, established in 2003 for the Asia Pacific region. ARINC had more than 3,200 employees at over 120 locations worldwide. The sale of the company by Carlyle Group to Rockwell Collins was completed on December 23, 2013, and from November 2018 onward operates as part of Collins Aerospace. History ARINC was incorporated in 1929 as Aeronautical Radio, Incorporated. It was chartered by the Federal Radio Co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
