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RAF Saxa Vord
Remote Radar Head Saxa Vord or RRH Saxa Vord (aka RAF Saxa Vord), is a Royal Air Force radar station located on the island of Unst, the most northern of the Shetland Islands in Scotland. As of July 2019 it is once more a fully operational radar station, after closure in 2006. The station's motto ''Praemoneo de Periculis'' ('Premonition of Peril') reflects its role. RAF Saxa Vord is further north than Saint Petersburg in Russia, and on the same latitude as Anchorage, Alaska. The station was named after Saxa Vord, which is the highest hill on Unst at . It holds the unofficial British record for wind speed, which in 1992 was recorded at — just before the measuring equipment blew away. History Early years The island of Unst has played an important part in the defence of the UK since the outbreak of the Second World War. By 1945, there were two radar sites on the island – one on Saxa Vord hill, and the other at Skaw on the east coast. This latter is the older, being built in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unst
Unst (; sco, Unst; nrn, Ønst) is one of the North Isles of the Shetland Islands, Scotland. It is the northernmost of the inhabited British Isles and is the third-largest island in Shetland after Mainland and Yell. It has an area of . Unst is largely grassland, with coastal cliffs. Its main village is Baltasound, formerly the second-largest herring fishing port after Lerwick and now the location of a leisure centre and the island's airport. Other settlements include Uyeasound, home to Greenwell's Booth (a Hanseatic warehouse) and Muness Castle (built in 1598 and sacked by pirates in 1627); and Haroldswick, location of a boat museum and a heritage centre. Etymology There are three island names in Shetland of unknown and possibly pre-Celtic origin: Unst, Fetlar and Yell. The earliest recorded forms of these three names do carry Norse meanings: ''Fetlar'' is the plural of ''fetill'' and means "shoulder-straps", ''Ǫmstr'' is "corn-stack" and ''í Ála'' is from ''ál'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AMES Type 13
Ames may refer to: Places United States * Ames, Arkansas, a place in Arkansas * Ames, Colorado * Ames, Illinois * Ames, Indiana * Ames, Iowa, the most populous city bearing this name * Ames, Kansas * Ames, Nebraska * Ames, New York * Ames, Oklahoma * Ames, Texas * Ames, West Virginia Europe * Ames, Pas-de-Calais, France * Ames, Spain Acronyms * Air Ministry Experimental Station, used in radar designations * AMES (school), Academy for Math, Engineering, and Science, in Salt Lake City, Utah * Apparent mineralocorticoid excess syndrome Other uses * Ames (automobile), an American brand * Ames Department Stores Inc. Ames Department Stores Inc. was an American chain of discount stores based in Rocky Hill, Connecticut, United States. The company was founded in 1958 with a store in Southbridge, Massachusetts, and at its peak operated 700 stores in 20 states, i ..., a defunct department store chain based in Connecticut * Ames (surname) * Ames family, the family associated ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heraldic Badges Of The Royal Air Force
Heraldic badges of the Royal Air Force are the insignia of certain commands, squadrons, units, wings, groups, branches and stations within the Royal Air Force. They are also commonly known as crests, especially by serving members of the Royal Air Force, but officially they are badges. Each badge must be approved by the reigning monarch of the time, and as such will either have a Tudor Crown (heraldry), King's or St Edward's Crown, Queen's Crown upon the top of the badge, dependent upon which monarch granted approval and the disbandment date of the unit.Most units/squadrons and bases had their badges updated to the Queen's Crown sometime after her accession, (although in some cases many years elapsed before the badge was updated). Most of the flying units were disbanded after the Second World War, so their badges retained the King's Crown. Queen Elizabeth II promulgated an order in October 1954 detailing that all current badges in use, and from that date on, were to use the Queen's ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plessey HF200
The HF200 is a height finder radar designed and first built by Decca Radar in 1957, and continuing sales into the 1970s after the division was purchased by Plessey in 1965. It was one of the company's successful heavy radar projects, winning the contract for many of the ROTOR stations in the UK and additional sales around the world with a total production run of about 40 examples. These served into the 1980s, and in one case, 1993, before 3D radars removed the need for separate height-finders. History Decca Heavy Radar won the contract to build the production models of the Green Garlic radar system developed by the Air Ministry's Telecommunications Research Establishment (TRE) in the early 1950s. This was just prior to the TRE's merger with their British Army counterparts to form the Radar Research Establishment in 1953. Decca's version of the Green Garlic was given the name AMES Type 80 and was among the most powerful radars of its era; the Mark III versions had a detection range ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AMES Type 96
Ames may refer to: Places United States * Ames, Arkansas, a place in Arkansas * Ames, Colorado * Ames, Illinois * Ames, Indiana * Ames, Iowa, the most populous city bearing this name * Ames, Kansas * Ames, Nebraska * Ames, New York * Ames, Oklahoma * Ames, Texas * Ames, West Virginia Europe * Ames, Pas-de-Calais, France * Ames, Spain Acronyms * Air Ministry Experimental Station, used in radar designations * AMES (school), Academy for Math, Engineering, and Science, in Salt Lake City, Utah * Apparent mineralocorticoid excess syndrome Other uses * Ames (automobile), an American brand * Ames Department Stores Inc. Ames Department Stores Inc. was an American chain of discount stores based in Rocky Hill, Connecticut, United States. The company was founded in 1958 with a store in Southbridge, Massachusetts, and at its peak operated 700 stores in 20 states, i ..., a defunct department store chain based in Connecticut * Ames (surname) * Ames family, the family associated ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AMES Type 85
The AMES Type 85, also known by its rainbow code Blue Yeoman, was an extremely powerful early warning (EW) and fighter direction (GCI) radar used by the Royal Air Force (RAF) as part of the Linesman/Mediator radar network. First proposed in early 1958, it was eleven years before they became operational in late 1968, by which time they were already considered obsolete. The Type 85 remained the RAF's primary air defense radar until it was replaced by Marconi Martello sets in the late-1980s as part of the new IUKADGE network. In the 1950s the RAF deployed the ROTOR reporting network, and later improved this system with the AMES Type 80 radar. While these were being built, the carcinotron radar jammer was tested against it and found to completely blank out its display. At first, it was feared the carcinotron would render all long-range radars useless, but over time a number of new concepts emerged to deal with this threat. Among them was the Blue Riband radar, which used a dozen 8&nbs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AMES Type 84
The AMES Type 84, also known as the Microwave Early Warning or MEW, was a 23 cm wavelength early warning radar used by the Royal Air Force (RAF) as part of the Linesman/Mediator radar network. Operating in the L-band gave it improved performance in rain and hail, where the primary AMES Type 85 radar's performance dropped off. It operated beside the Type 85 and RX12874 in Linesman, and moved to the UKADGE system in the 1980s before being replaced during UKADGE upgrades in the early 1990s. The Type 84 had a decade-long development period that saw the system being repeatedly redesigned. It was first conceived in 1951 during the ROTOR program as a megawatt-powered S-band system that would replace the WWII-era Chain Home radars for early warning. But an experimental system developed at the Royal Radar Establishment (RRE) offered similar performance and would be available long before the MEW's 1957 target date. Put into operation as the AMES Type 80 in 1953, the immediate need for M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Linesman/Mediator
Linesman/Mediator was a dual-purpose civil and military radar network in the United Kingdom between the 1960s and 1984. The military side (Linesman) was replaced by the Improved United Kingdom Air Defence Ground Environment (IUKADGE), while the civilian side (Mediator) became the modern public-private National Air Traffic Services (NATS). In the 1950s, the Royal Air Force was installing a radar network known as ROTOR using war-era radars like Chain Home along with new command centres. A new radar, the AMES Type 80, replaced all of the ROTOR radars and command centres with a series of nine Master Control Radars and a number of associated secondary radars. While these installations were in progress in the early 1950s, Compagnie générale de la télégraphie sans fil, CSF introduced the carcinotron, which could output a radio signal at any desired frequency. This made it a very effective Radar jamming and deception, jamming system, and it appeared to render ground-based radars li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radar Jammer
Radar jamming and deception is a form of electronic countermeasures that intentionally sends out radio frequency signals to interfere with the operation of radar by saturating its receiver with noise or false information. Concepts that blanket the radar with signals so its display cannot be read are normally known as jamming, while systems that produce confusing or contradictory signals are known as deception, but it is also common for all such systems to be referred to as jamming. There are two general classes of radar jamming, mechanical and electronic. Mechanical jamming entails reflecting enemy radio signals in various ways to provide false or misleading target signals to the radar operator. Electronic jamming works by transmitting additional radio signals towards enemy receivers, making it difficult to detect real target signals, or take advantage of known behaviors of automated systems like radar lock-on to confuse the system. Various counter-countermeasures can sometimes he ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carcinotron
A backward wave oscillator (BWO), also called carcinotron or backward wave tube, is a vacuum tube that is used to generate microwaves up to the terahertz range. Belonging to the traveling-wave tube family, it is an oscillator with a wide electronic tuning range. An electron gun generates an electron beam that interacts with a slow-wave structure. It sustains the oscillations by propagating a traveling wave backwards against the beam. The generated electromagnetic wave power has its group velocity directed oppositely to the direction of motion of the electrons. The output power is coupled out near the electron gun. It has two main subtypes, the M-type (M-BWO), the most powerful, and the O-type (O-BWO). The output power of the O-type is typically in the range of 1 mW at 1000 GHz to 50 mW at 200 GHz. Carcinotrons are used as powerful and stable microwave sources. Due to the good quality wavefront they produce (see below), they find use as illuminators in terahertz ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Navy
The Royal Navy (RN) is the United Kingdom's naval warfare force. Although warships were used by English and Scottish kings from the early medieval period, the first major maritime engagements were fought in the Hundred Years' War against France. The modern Royal Navy traces its origins to the early 16th century; the oldest of the UK's armed services, it is consequently known as the Senior Service. From the middle decades of the 17th century, and through the 18th century, the Royal Navy vied with the Dutch Navy and later with the French Navy for maritime supremacy. From the mid 18th century, it was the world's most powerful navy until the Second World War. The Royal Navy played a key part in establishing and defending the British Empire, and four Imperial fortress colonies and a string of imperial bases and coaling stations secured the Royal Navy's ability to assert naval superiority globally. Owing to this historical prominence, it is common, even among non-Britons, to ref ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radome
A radome (a portmanteau of radar and dome) is a structural, weatherproof enclosure that protects a radar antenna (radio), antenna. The radome is constructed of material transparent to radio waves. Radomes protect the antenna from weather and conceal antenna electronic equipment from view. They also protect nearby personnel from being accidentally struck by quickly rotating antennas. Radomes can be constructed in several shapes spherical, geodesic dome, geodesic, planar, etc. depending on the particular application, using various construction materials such as fiberglass, polytetrafluoroethylene, polytetrafluoroethylene (PTFE)-coated fabric, and others. When found on fixed-wing aircraft with forward-looking radar, as are commonly used for object or weather detection, the nose cones often additionally serve as radomes. On aircraft used for airborne early warning and control (AEW&C), a rotating radome, often called a "rotodome", is mounted on the top of the fuselage for 360-degr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
