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Tatsfield Receiving Station
The Tatsfield Receiving Station – known formally as the ''BBC Engineering Measurement and Receiving Station'' – was a radio broadcasting signals-receiving and frequency-measuring facility operated by the British Broadcasting Corporation (BBC) on the North Downs just south of London in the United Kingdom. The station was in operation between 1929 and 1974. Functions The Tatsfield station’s work included: *Measuring to high degrees of accuracy the frequencies of BBC radio and TV transmitters. It is important that broadcast transmitters remain on their assigned frequency in order to avoid interfering with other users of the radio spectrum. A particularly high level of frequency stability is required in the case of several transmitters carrying the same programme on a single frequency in a synchronised network. *Measuring the frequencies of foreign transmitters, exchanging such information with similar receiving stations abroad, in cooperation initially with the Internati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radio Broadcasting
Radio broadcasting is transmission of audio (sound), sometimes with related metadata, by radio waves to radio receivers belonging to a public audience. In terrestrial radio broadcasting the radio waves are broadcast by a land-based radio station, while in satellite radio the radio waves are broadcast by a satellite in Earth orbit. To receive the content the listener must have a broadcast radio receiver (''radio''). Stations are often affiliated with a radio network which provides content in a common radio format, either in broadcast syndication or simulcast or both. Radio stations broadcast with several different types of modulation: AM radio stations transmit in AM ( amplitude modulation), FM radio stations transmit in FM (frequency modulation), which are older analog audio standards, while newer digital radio stations transmit in several digital audio standards: DAB (digital audio broadcasting), HD radio, DRM ( Digital Radio Mondiale). Television broadcasting ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Open-source Intelligence
Open-source intelligence (OSINT) is the collection and analysis of data gathered from open sources (covert and publicly available sources) to produce actionable intelligence. OSINT is primarily used in national security, law enforcement, and business intelligence functions and is of value to analysts who use non-sensitive intelligence in answering classified, unclassified, or proprietary intelligence requirements across the previous intelligence disciplines. OSINT sources can be divided up into six different categories of information flow: *Media, print newspapers, magazines, radio, and television from across and between countries. *Internet, online publications, blogs, discussion groups, citizen media (i.e. – cell phone videos, and user created content), YouTube, and other social media websites (i.e. – Facebook, Twitter, , etc.). This source also outpaces a variety of other sources due to its timeliness and ease of access. *Public government data, public government repo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World War II
World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposing military alliances: the Allies and the Axis powers. World War II was a total war that directly involved more than 100 million personnel from more than 30 countries. The major participants in the war threw their entire economic, industrial, and scientific capabilities behind the war effort, blurring the distinction between civilian and military resources. Aircraft played a major role in the conflict, enabling the strategic bombing of population centres and deploying the only two nuclear weapons ever used in war. World War II was by far the deadliest conflict in human history; it resulted in 70 to 85 million fatalities, mostly among civilians. Tens of millions died due to genocides (including the Holocaust), starvation, ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
London Borough Of Bromley
The London Borough of Bromley () is the southeasternmost of the London boroughs that make up Greater London, bordering the ceremonial county of Kent, which most of Bromley was part of before 1965. The borough's population is an estimated 332,336. It is named after Bromley, its principal town; other major towns are Penge, Hayes, West Wickham, Chislehurst, Beckenham and Orpington. The local authority is Bromley London Borough Council. Geography The borough is the largest in Greater London by area and occupies . The majority of the borough is Metropolitan Green Belt, including nearly all of the land south of the A232-A21 route between West Wickham and Pratt's Bottom. Consequently, it is also perhaps the most rural borough and contains more of the North Downs than any other, as that escarpment is broad between Bromley and Banstead. This is also reflected in its population density, which is the lowest of the 32 London boroughs. Most of the population lives in the north and west of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kent
Kent is a county in South East England and one of the home counties. It borders Greater London to the north-west, Surrey to the west and East Sussex to the south-west, and Essex to the north across the estuary of the River Thames; it faces the French department of Pas-de-Calais across the Strait of Dover. The county town is Maidstone. It is the fifth most populous county in England, the most populous non-Metropolitan county and the most populous of the home counties. Kent was one of the first British territories to be settled by Germanic tribes, most notably the Jutes, following the withdrawal of the Romans. Canterbury Cathedral in Kent, the oldest cathedral in England, has been the seat of the Archbishops of Canterbury since the conversion of England to Christianity that began in the 6th century with Saint Augustine. Rochester Cathedral in Medway is England's second-oldest cathedral. Located between London and the Strait of Dover, which separates England from mainla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Keston
Keston is a village in Greater London, England, located within the London Borough of Bromley, Greater London. Prior to 1965 it was withing the historic county of Kent. It is part suburban, part rural in nature and lies on the edge of Hayes Common, just beyond the London conurbation to the south of Bromley Common. It includes the small hamlet of Nash to the southwest. The northern, more suburban part of Keston is sometimes referred to as Keston Mark. History Flint implements and pit dwellings on Keston and Hayes Commons show occupation of the area back to at least 3000 B.C., and there are Iron Age encampments in Holwood Park and on Keston Common. In the valley below the village are the ruins of a complex of 3rd century AD Roman tombs and mausolea () connected with the nearby 1st - 4th century AD Roman villa excavated 1967-1992 (). Sited closer to the original Keston Court than the main village itself, Keston's small medieval church is unusual in that does not have a dedicat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
M25 Motorway
The M25 or London Orbital Motorway is a major road encircling most of Greater London. The motorway is one of the most important roads in the UK and one of the busiest. Margaret Thatcher opened the final section in 1986, making the M25 the longest ring road in Europe upon opening. The Dartford Crossing completes the orbital route but is not classed as motorway; it is classed as a trunk road and designated as the A282. In some cases, including notable legal contexts such as the Communications Act 2003, the M25 is used as a ''de facto'' alternative boundary for Greater London. In the 1944 ''Greater London Plan'', Patrick Abercrombie proposed an orbital motorway around London. This evolved into the London Ringways project in the early 1960s, and by 1966, planning had started on two projects, London Ringways#Ringway 3, Ringway 3 to the north and London Ringways#Ringway 4, Ringway 4 to the south. By the time the first sections opened in 1975, it was decided the ringways would be com ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ordnance Survey
, nativename_a = , nativename_r = , logo = Ordnance Survey 2015 Logo.svg , logo_width = 240px , logo_caption = , seal = , seal_width = , seal_caption = , picture = , picture_width = , picture_caption = , formed = , preceding1 = , dissolved = , superseding = , jurisdiction = Great BritainThe Ordnance Survey deals only with maps of Great Britain, and, to an extent, the Isle of Man, but not Northern Ireland, which has its own, separate government agency, the Ordnance Survey of Northern Ireland. , headquarters = Southampton, England, UK , region_code = GB , coordinates = , employees = 1,244 , budget = , minister1_name = , minister1_pfo = , chief1_name = Steve Blair , chief1_position = CEO , agency_type = , parent_agency = , child1_agency = , keydocument1 = , website = , footnotes = , map = , map_width = , map_caption = Ordnance Survey (OS) is the national mapping agency for Great Britain. The agency's name indicates its original military purpose (se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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