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Skynet (satellite)
Skynet is a family of military communications satellites, now operated by Airbus Defence and Space on behalf of the United Kingdom's Ministry of Defence (MoD). They provide strategic and tactical communication services to the branches of the British Armed Forces, the British intelligence agencies, some UK government departments and agencies, and to allied governments. Since 2015 when Skynet coverage was extended eastward, and in conjunction with an Anik G1 satellite module over America, Skynet offers near global coverage. The Skynet contract allow Airbus Defence and Space to sell surplus bandwidth, through the Skynet partner programme, to NATO and allied governments, including the Five Eyes intelligence alliance members (Australia, Canada, New Zealand, the United Kingdom and the United States). As of 2020, seven Skynet satellites are operating, plus Anik G1. The Skynet 1 to 4 series were developed and operated by the Signals Research and Development Establishment, Royal Sign ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Space Debris
Space debris (also known as space junk, space pollution, space waste, space trash, or space garbage) are defunct human-made objects in space—principally in Earth orbit—which no longer serve a useful function. These include derelict spacecraft—nonfunctional spacecraft and abandoned launch vehicle stages—mission-related debris, and particularly numerous in Earth orbit, fragmentation debris from the breakup of derelict rocket bodies and spacecraft. In addition to derelict human-made objects left in orbit, other examples of space debris include fragments from their disintegration, erosion and collisions or even paint flecks, solidified liquids expelled from spacecraft, and unburned particles from solid rocket motors. Space debris represents a risk to spacecraft. Space debris is typically a negative externality—it creates an external cost on others from the initial action to launch or use a spacecraft in near-Earth orbit—a cost that is typically not taken into account n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RAF Gan
Royal Air Force Station Gan, commonly known as RAF Gan, is a former Royal Air Force station on Gan island, the southern-most island of Addu Atoll, which is part of the larger groups of islands which form the Maldives, in the middle of the Indian Ocean. Its motto is ''En Route'', which signifies its importance as a strategic staging post for enabling RAF aircraft to reach their onward destinations at their bases in the Far East. Following the departure of the Royal Air Force (RAF) in 1976, the former RAF Gan airfield was developed into a civilian airport, and is now known as Gan International Airport. History The area was originally established as a military base for the Royal Navy (RN) in . Royal Navy engineers began constructing airstrips on Gan island from crushed coral in August 1941 for the Fleet Air Arm (FAA). During World War II, in 1942, the Royal Air Force (RAF) had its bases in the islands of Addu Atoll, Maldives. The RAF first had a presence on Hithadoo in 1942, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RAF Bahrain
Muharraq Airfield is a military base located adjacent to Bahrain International Airport. It is run by the United States Navy (USN) and usually ships supplies in and out of the airport with many of them from other countries as well. The USN, the United States Marine Corps (USMC), the Ministry of Interior, and others run the security at the airfield. Often referred to as the nearby city of Manama, Muharraq Airfield was the last stop for most US troops headed to join the NATO forces in Afghanistan. It was previously established by the Royal Air Force as RAF Bahrain (later changed to RAF Muharraq) in April 1943 and remained in use until 1971 when Bahrain declared independence. History The Royal Air Force's history with Bahrain can be traced back to 1924, with flights originating from Shaibah Air Base in Iraq. The perceived strategic importance of Bahrain by the British led to the signing of a civil air agreement with the King of Bahrain in 1934. The Royal Air Force established a base ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Watt
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). : ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Satellite Dish
A satellite dish is a dish-shaped type of parabolic antenna designed to receive or transmit information by radio waves to or from a communication satellite A communications satellite is an artificial satellite that relays and amplifies radio telecommunication signals via a transponder; it creates a communication channel between a source transmitter and a receiver at different locations on Earth. C .... The term most commonly means a dish which receives direct-broadcast satellite television from a direct broadcast satellite in geostationary orbit. History Parabolic antennas referred to as "dish" antennas had been in use long before satellite television. The term ''satellite dish'' was coined in 1978 during the beginning of the satellite television industry, and came to refer to dish antennas that send and/or receive signals from communications satellites. Taylor Howard of San Andreas, California, adapted an ex-military dish in 1976 and became the first person to receive s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Singapore Naval Base
His Majesty's Naval Base, Singapore, also Her Majesty's Naval Base, Singapore (HMNB Singapore), alternatively known as the Singapore Naval Base, Sembawang Naval Base and HMS Sembawang, was situated in Sembawang at the North Region, Singapore, northern tip of Singapore and was both a Royal Navy Stone frigate, shore establishment and a cornerstone of British defence policy (the Singapore strategy) in the Far East between the World Wars. From 1921 to 1941 it was a base of the China Station and from 1941 to 1958 it was a base for the Far East Fleet. Today, it is a commercial dockyard but British military activity still exists at the British Defence Singapore Support Unit (BDSSU). History Through the 19th Century, the British Government relied on four Imperial fortress colonies as primary bases for the Royal Navy and British Army for control of the World's oceans. These were Bermuda and Halifax, Nova Scotia (military control of the latter was handed to the Canadian militia follow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Akrotiri And Dhekelia
Akrotiri and Dhekelia, officially the Sovereign Base Areas of Akrotiri and Dhekelia (SBA),, ''Periochés Kyríarchon Váseon Akrotiríou ke Dekélias''; tr, Ağrotur ve Dikelya İngiliz Egemen Üs Bölgeleri is a British Overseas Territory on the island of Cyprus. The areas, which include British military bases and installations, as well as other land, were retained by the British under the 1960 treaty of independence, signed by the United Kingdom, Greece, Turkey and representatives from the Greek and Turkish Cypriot communities, which granted independence to the (then) Crown colony of Cyprus. The territory serves an important role as a station for signals intelligence and provides a vital strategic part of the United Kingdom surveillance-gathering network in the Mediterranean and the Middle East. History The Sovereign Base Areas were created in 1960 by the London and Zürich Agreements, when Cyprus achieved independence from the British Empire, as recorded by the Unite ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RAF Oakhanger
RAF Oakhanger is a Royal Air Force station in Hampshire split over three operational sites; with accommodation in nearby Bordon. The main site and operations centre is located near the village of Oakhanger, the two other sites being nearby. The parent station for administrative purposes was RAF Odiham. History RAF Oakhanger was the home of No. 1001 Signal Unit, responsible for supporting satellite communications services for the British Armed Forces worldwide. The unit was made up of four sub-units: Space Operations, Ground Operations, Telemetry and Control, and Support; with subordinate detachments based at RAF Rudloe Manor, RAF Colerne and RAF Defford. Command and Control of the system was conducted from Oakhanger, with a planning unit based at Rudloe Manor, co-located with No. 1 Signal Unit and Controller Defence Communication Network. The Colerne and Defford detachments provided a ground anchoring capability for the communications spacecraft. The Defford detachment was m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philco Ford
Philco (an acronym for Philadelphia Battery Company) is an American electronics industry, electronics manufacturer headquartered in Philadelphia. Philco was a pioneer in battery, radio, and television production. In 1961, the company was purchased by Ford Motor Company, Ford and, from 1966, renamed "Philco-Ford". Ford sold the company to GTE in 1974, and it was purchased by Philips in 1981. In North America, the Philco brand is currently owned by Philips. In other markets, the Philco International brand is owned by Electrolux. In the early 1920s, Philco made storage batteries, "socket power" battery eliminator units (plug-in transformers), and battery chargers. With the invention of the rectifier tube, which made it practical to power radios by electrical outlets, in 1928, Philco entered the radio business. They followed other radio makers such as RCA, Atwater-Kent, Zenith Electronics, Freshman Masterpiece, FADA Radio (Frank A. D'Andrea Radio), and AH Grebe into the battery-powere ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marconi Company
The Marconi Company was a British telecommunications and engineering company that did business under that name from 1963 to 1987. Its roots were in the Wireless Telegraph & Signal Company founded by Italian inventor Guglielmo Marconi in 1897, which underwent several changes in name after mergers and acquisitions. The company was a pioneer of wireless long distance communication and mass media broadcasting, eventually becoming one of the UK's most successful manufacturing companies. In 1999, its defence equipment manufacturing division, Marconi Electronic Systems, merged with British Aerospace (BAe) to form BAE Systems. In 2006, financial difficulties led to the collapse of the remaining company, with the bulk of the business acquired by the Swedish telecommunications company, Ericsson. History Naming history *1897–1900: The Wireless Telegraph & Signal Company *1900–1963: Marconi's Wireless Telegraph Company *1963–1987: Marconi Company Ltd *1987–1998: GEC-Marconi Ltd ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Defense Satellite Communications System
The Defense Satellite Communications System (DSCS) is a United States Space Force satellite constellation that provides the United States with military communications to support globally distributed military users. Beginning in 2007, DSCS is being replaced by the Wideband Global SATCOM system. A total of 14 DSCS-III satellites were launched between the early 1980s and 2003. Two satellites were launched aboard the Space Shuttle ''Atlantis'' in 1985 during the STS-51-J flight. As of 14 September 2021, six DSCS-III satellites were still operational. DSCS operations are currently run by the 4th Space Operations Squadron out of Schriever Space Force Base. Background DSCS went through three major phases — IDCSP (Interim Defense Communication Satellite Program), DSCS-II, and DSCS-III. Since the first launch, DSCS has been the "workhorse" of military satellite communications. All DSCS III satellites have exceeded their 10-year design life. The National Science Foundation use ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
