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Alouette 1
''Alouette 1'' is a deactivated Canadian satellite that studied the ionosphere. Launched in 1962, it was Canada's first satellite, and the first satellite constructed by a country other than the Soviet Union or the United States. Canada was the fourth country to operate a satellite, as the British ''Ariel 1'', constructed in the United States by NASA, preceded ''Alouette 1'' by five months. The name "Alouette" came from the French for "skylark" and the French-Canadian folk song of the same name. A key device on ''Alouette'' were the radio antennas consisting of thin strips of beryllium copper bent into a slight U-shape and then rolled up into small disks in a fashion similar to a measuring tape. When triggered, the rotation of the satellite created enough centrifugal force to pull the disk away from the spacecraft body, and the shaping of the metal caused it to unwind into a long spiral. The result was a stiff circular cross-section antenna known as a "STEM", for "storable tub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Defence Research And Development Canada
Defence Research and Development Canada (DRDC; french: Recherche et développement pour la défense Canada, ''RDDC'') is a special operating agency of the Department of National Defence (DND), whose purpose is to provide the Canadian Armed Forces (CAF), other government departments, and public safety and national security communities with knowledge and technology. DRDC has approximately 1,400 employees across eight research centres within Canada. History After the First World War, national research and development in Canada was organized under the National Research Council (NRC). The NRC was founded in 1925 based on a wartime British recommendation to establish military laboratories in Canada, but by that time the main priorities were developing domestic university and industrial research and civilian projects.Turner, p.15 Greater interest in military applied research arrived in 1935Turner, p.16 when Major-General Andrew McNaughton became President of the NRC.;Turner, p.17 in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Measuring Tape
A tape measure or measuring tape is a flexible ruler used to measure length or distance. It consists of a ribbon of cloth, plastic, fibre glass, or metal strip with linear measurement markings. It is a common measuring tool. Its design allows for a measure of great length to be easily carried in pocket or toolkit and permits one to measure around curves or corners. Today it is ubiquitous, even appearing in miniature form as a keychain fob, or novelty item. Surveyors use tape measures in lengths of over 100 m. Types There are two basic types of tape measures with cases: spring return pocket tape measures and long tape measures. Spring return pocket tape measures will generally fit in a pocket. They are small; the case is up to about three inches across. The tape is returned to the case by a spring mechanism. Pocket tape measures have a tape in length and across. A second tape measure design is what is called the long tape. These are cased tape measures with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thor-Agena
Thor-Agena was a series of orbital launch vehicles. The launch vehicles used the Douglas-built Thor first stage and the Lockheed-built Agena second stages. They are thus cousins of the more-famous Thor-Deltas, which founded the Delta rocket family. The first attempted launch of a Thor-Agena was in January 1959. The first successful launch was on 28 February 1959, launching ''Discoverer 1''. It was the first two-stage launch vehicle to place a satellite into orbit. Missions Among other uses, the clandestine CORONA program used Thor-Agena from June 1959 until January 1968 to launch United States military reconnaissance satellites operated by the Central Intelligence Agency (CIA). During this program, Thor-Agena launch vehicles were used in 145 launch attempts, now known to have been part of satellite surveillance programs. Also, ''Alouette 1,'' Canada's first satellite, was launched on a Thor-Agena B. 1963 Mystery Cloud On 28 February 1963, a Thor-Agena launch vehicle car ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canadian Air And Space Museum
The Canadian Air and Space Conservancy (formerly the Toronto Aerospace Museum and the Canadian Air and Space Museum) was an aviation museum that was located in Toronto, Ontario, featuring artifacts, exhibits and stories illustrating a century of Canadian aviation heritage and achievements. The museum was located in a hangar that once housed the original de Havilland Canada aircraft manufacturing building, but in September 2011 the museum and all of the other tenants in the building were evicted by the landlord, the Crown Corporation, PDP (Downsview Park). The site was slated for redevelopment as a new sports centre but after closing the museum the development was placed on hold. The museum is developing a new location and its collections are currently not available for public viewing. Located in what is now known as Downsview Park, the hangar was later appropriated by the Royal Canadian Air Force as a part of RCAF Station Downsview, and then later as CFB Toronto, which was closed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North York
North York is one of the six administrative districts of Toronto, Ontario, Canada. It is located directly north of York, Old Toronto and East York, between Etobicoke to the west and Scarborough to the east. As of the 2016 Census, it had a population of 869,401. North York was created as a township in 1922 out of the northern part of the former township of York, a municipality that was located along the western border of Old Toronto. Following its inclusion in Metropolitan Toronto in 1953, it was one of the fastest-growing parts of the region due to its proximity to Old Toronto. It was declared a borough in 1967, and later became a city in 1979, attracting high-density residences, rapid transit, and a number of corporate headquarters in North York City Centre, its central business district. In 1998, North York was amalgamated with the rest of Metropolitan Toronto to form the new city of Toronto and has since been a secondary economic hub of the city outside Downtown Toronto. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
De Havilland Canada
De Havilland Aircraft of Canada Limited is an aircraft manufacturer with facilities formerly based in the Downsview area of Toronto, Ontario, Canada. The original home of de Havilland Canada was the home of the Canadian Air and Space Museum located in what is now Downsview Park. The aircraft company was created in 1928 by the British de Havilland Aircraft Company to build Moth aircraft for the training of Canadian airmen, and subsequently after the Second World War, designed and produced indigenous designs. In the 1980s, the government of Canada under Prime Minister Brian Mulroney privatized DHC and in 1986 sold the aircraft company to then Seattle-based Boeing. DHC was eventually acquired by Montreal-based Bombardier Aerospace in 1992. In 2006, Viking Air of Victoria, British Columbia, purchased the type certificates for all the original out-of-production de Havilland designs (DHC-1 to DHC-7). In November 2018, Viking Air's holding company, Longview Aviation Capital, announce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SPAR Aerospace
SPAR Aerospace was a Canadian aerospace company. It produced equipment for the Canadian Space Agency to be used in cooperation with NASA's Space Shuttle program, most notably the Canadarm, a remote manipulator system. The company went through a series of changes through mergers and acquisition activities, and is now part of MDA. History The company was originally formed in 1967 in Brampton, Ontario through a management buyout of de Havilland Canada’s Special Products division and Avro Canada's Applied Research unit. This provided the name Special Products/Applied Research, or SPAR for short. Special Products was best known for the construction of the Alouette 1 satellite, which made Canada the fourth spacefaring nation. The company was initially involved in spacecraft applications. Larry Clarke led the formation of the company and was its first president. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ottawa
Ottawa (, ; Canadian French: ) is the capital city of Canada. It is located at the confluence of the Ottawa River and the Rideau River in the southern portion of the province of Ontario. Ottawa borders Gatineau, Quebec, and forms the core of the Ottawa–Gatineau census metropolitan area (CMA) and the National Capital Region (NCR). Ottawa had a city population of 1,017,449 and a metropolitan population of 1,488,307, making it the fourth-largest city and fourth-largest metropolitan area in Canada. Ottawa is the political centre of Canada and headquarters to the federal government. The city houses numerous foreign embassies, key buildings, organizations, and institutions of Canada's government, including the Parliament of Canada, the Supreme Court, the residence of Canada's viceroy, and Office of the Prime Minister. Founded in 1826 as Bytown, and incorporated as Ottawa in 1855, its original boundaries were expanded through numerous annexations and were ultimately ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hertz
The hertz (symbol: Hz) is the unit of frequency in the International System of Units (SI), equivalent to one event (or cycle) per second. The hertz is an SI derived unit whose expression in terms of SI base units is s−1, meaning that one hertz is the reciprocal of one second. It is named after Heinrich Rudolf Hertz (1857–1894), the first person to provide conclusive proof of the existence of electromagnetic waves. Hertz are commonly expressed in multiples: kilohertz (kHz), megahertz (MHz), gigahertz (GHz), terahertz (THz). Some of the unit's most common uses are in the description of periodic waveforms and musical tones, particularly those used in radio- and audio-related applications. It is also used to describe the clock speeds at which computers and other electronics are driven. The units are sometimes also used as a representation of the energy of a photon, via the Planck relation ''E'' = ''hν'', where ''E'' is the photon's energy, ''ν'' is its freq ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Watt (unit)
The watt (symbol: W) is the unit of power or radiant flux in the International System of Units (SI), equal to 1 joule per second or 1 kg⋅m2⋅s−3. It is used to quantify the rate of energy transfer. The watt is named after James Watt (1736–1819), an 18th-century Scottish inventor, mechanical engineer, and chemist who improved the Newcomen engine with his own steam engine in 1776. Watt's invention was fundamental for the Industrial Revolution. Overview When an object's velocity is held constant at one metre per second against a constant opposing force of one newton, the rate at which work is done is one watt. : \mathrm In terms of electromagnetism, one watt is the rate at which electrical work is performed when a current of one ampere (A) flows across an electrical potential difference of one volt (V), meaning the watt is equivalent to the volt-ampere (the latter unit, however, is used for a different quantity from the real power of an electrical circuit). : \m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Megahertz
The hertz (symbol: Hz) is the unit of frequency in the International System of Units (SI), equivalent to one event (or Cycle per second, cycle) per second. The hertz is an SI derived unit whose expression in terms of SI base units is s−1, meaning that one hertz is the reciprocal of one second. It is named after Heinrich Hertz, Heinrich Rudolf Hertz (1857–1894), the first person to provide conclusive proof of the existence of electromagnetic waves. Hertz are commonly expressed in metric prefix, multiples: kilohertz (kHz), megahertz (MHz), gigahertz (GHz), terahertz (THz). Some of the unit's most common uses are in the description of periodic waveforms and musical tones, particularly those used in radio- and audio-related applications. It is also used to describe the clock speeds at which computers and other electronics are driven. The units are sometimes also used as a representation of the photon energy, energy of a photon, via the Planck relation ''E'' = ''hν'', ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Winkfield
Winkfield is a village and civil parish in the Bracknell Forest unitary authority of Berkshire, England. Geography According to the 2011 Census, the parish had a population of 14,998. The parish includes the hamlets of Winkfield, Maidens Green, Winkfield Row, Burleigh, Winkfield Street, Chavey Down, Woodside, Cranbourne and Swinley, part of the village of North Ascot and the Bracknell suburbs of Forest Park, Martins Heron and The Warren. The parish used to be slightly larger – additionally covering what is now Bullbrook, Crown Wood and Harmans Water – and is said to have been one of the largest in England. History There is evidence of human occupation in Winkfield in prehistoric times. From the Late Iron Age, this evidence becomes more substantial, although there is as yet no hard evidence of settlement until the early Medieval era. Winkfield was recorded in the Domesday Book of 1086 as ''Wenesfelle'', and was recorded to have 20 households and 20 ploughlands ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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