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Hispasat 1D
The Hispasat 1D, since 2016 called Hispasat 30W-4 is a Spanish communications satellite launched in 2002 operated by Hispasat. Together with the Hispasat 1C it formed a Satellite constellation, constellation in order to strengthen communication ties between the American continent (particularly South America) and the Iberian Peninsula for both governmental and private uses. The end of the service life of the constellation was scheduled for 2017 (after more than 15 years in active) however as of 2022 the Hispasat 1D is still active. Body The Hispasat 1D was built by Alcatel Space. It is based in the Spacebus-3000B2 Satellite bus, bus. The satellite has a dry mass of 1,345 kg (increased to 3,250 kg at launch). It is shaped as a rectangular prism whose lateral faces allocate four Silicon retractable solar panels capable of providing 7 kW (end of life) directly to the two sets of regulated power supplies. When fully deployed it has a Radar cross-section, RCS of 17.6 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hispasat
Hispasat is the operating company for a number of Spanish communications satellites that cover the Americas, Europe and North Africa from orbital positions 30.0° West and 61.0° West. It was formed in 1989 and its activities include provision of communication services in the commercial and government sectors (corporate networks, advanced telecommunications services, telephony, videoconferencing, etc.). Hispasat's fleet of satellites broadcast more than 1250 television channels and radio stations to more than 30 million homes, as well as providing services such as broadband to mobile telephones and landlines. The first Hispasat satellite sent into orbit was Hispasat 1A, which was launched on 11 September 1992 on board an Ariane 4 launch vehicle from the Centre Spatial Guyanais near Kourou in French Guiana. It was put into geostationary orbit at 30° West, which is the location of all their subsequent satellites serving Spain and Europe. The Amazonas satellites (61° West) wer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monomethylhydrazine
Monomethylhydrazine (mono-methyl hydrazine, MMH) is a highly toxic, volatile hydrazine derivative with the chemical formula . It is used as a rocket propellant in bipropellant rocket engines because it is hypergolic with various oxidizers such as nitrogen tetroxide () and nitric acid (). As a propellant, it is described in specification MIL-PRF-27404. MMH is a hydrazine derivative that was once used in the orbital maneuvering system (OMS) and reaction control system (RCS) engines of NASA's Space Shuttle, which used MMH and MON-3 (a mixture of nitrogen tetroxide with approximately 3% nitric oxide). This chemical is toxic and carcinogenic, but it is easily stored in orbit, providing moderate performance for very low fuel tank system weight. MMH and its chemical relative unsymmetrical dimethylhydrazine (UDMH) have a key advantage that they are stable enough to be used in regeneratively cooled rocket engines. The European Space Agency (ESA) has attempted to seek new options in terms o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arganda Del Rey
Arganda del Rey () is a municipality and city of Spain located in the Community of Madrid. Geography Located in the central part of the Iberian Peninsula, the city lies at roughly 613 metres above sea level, not far from the junction of the Jarama and Manzanares rivers. It has been ascribed either to the Comarca de Alcalá or the Alcarria de Alcalá natural regions. It is connected to Madrid by metro line 9, which upon exiting Madrid's city limits has sections that are both above and under ground. History The first permanent dwelling does not date back to the Arab presence in the Iberian Peninsula as it has been suggested. archaeological Remains from the earlier Roman era have been found, and some philologists argue that the name of the municipality comes from the Latin ''area canda'' ("white area"). In the Roman texts of Ptolemy several cities are mentioned as pre-Roman habitations (Carpetanos) with Alternia (Arganda) among them. In the 11th century, Arganda was the home ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Space Launch Delta 45
The Space Launch Delta 45 (SLD 45) is a unit of the United States Space Force. The Space Launch Delta 45 is assigned to Space Systems Command and headquartered at Patrick Space Force Base, Florida. The wing also controls Cape Canaveral Space Force Station. The 45th Space Delta is responsible for all space launch operations from the East Coast. It manages the Eastern Range, including launch activities for the Space Force, Department of Defense (DoD), NASA, and other private space corporations. Operations The 45th Space Delta is one of two space launch wings for the U.S. Space Force, being responsible for executing military, intelligence, civil, and commercial space launches using the Eastern Range. Primary launch vehicles include the Atlas V, Delta IV, Delta IV Heavy, Pegasus, Minotaur, Falcon 9, Falcon Heavy, and Boeing X-37 rockets. It also supports U.S. Navy Trident II D5 ballistic missile tests and evaluation. The 45th Space Delta is the host wing for Patrick Space Force ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cape Canaveral Space Force Station
Cape Canaveral Space Force Station (CCSFS) is an installation of the United States Space Force's Space Launch Delta 45, located on Cape Canaveral in Brevard County, Florida. Headquartered at the nearby Patrick Space Force Base, the station is the primary launch site for the Space Force's Eastern RangeCAST 1999, p. 1-12. with three launch pads currently active (Space Launch Complexes 37B, 40, and 41). The facility is south-southeast of NASA's Kennedy Space Center on adjacent Merritt Island, with the two linked by bridges and causeways. The Cape Canaveral Space Force Station Skid Strip provides a runway close to the launch complexes for military airlift aircraft delivering heavy and outsized payloads to the Cape. A number of American space exploration pioneers were launched from CCSFS, including the first U.S. Earth satellite (1958), first U.S. astronaut (1961), first U.S. astronaut in orbit (1962), first two-man U.S. spacecraft (1965), first U.S. unmanned lunar land ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atlas II
Atlas II was a member of the Atlas family of launch vehicles, which evolved from the successful Atlas missile program of the 1950s. The Atlas II was a direct evolution of the Atlas I, featuring longer first stage tanks, higher-performing engines, and the option for strap-on solid rocket boosters. It was designed to launch payloads into low earth orbit, geosynchronous transfer orbit or geosynchronous orbit. Sixty-three launches of the Atlas II, IIA and IIAS models were carried out between 1991 and 2004; all sixty-three launches were successes, making the Atlas II a highly reliable space launch system. The Atlas line was continued by the Atlas III, used between 2000 and 2005, and the Atlas V which is still in use. Background In May 1988, the US Air Force chose General Dynamics (now Lockheed Martin) to develop the Atlas II vehicle, primarily to launch Defense Satellite Communications System payloads under the Medium Launch Vehicle II (MLV-II) program. Additional commercial and U.S. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dinitrogen Tetroxide
Dinitrogen tetroxide, commonly referred to as nitrogen tetroxide (NTO), and occasionally (usually among ex-USSR/Russia rocket engineers) as amyl, is the chemical compound N2O4. It is a useful reagent in chemical synthesis. It forms an equilibrium mixture with nitrogen dioxide. Its molar mass is 92.011 g/mol. Dinitrogen tetroxide is a powerful oxidizer that is hypergolic (spontaneously reacts) upon contact with various forms of hydrazine, which has made the pair a common bipropellant for rockets. Structure and properties Dinitrogen tetroxide could be regarded as two nitro groups (-NO2) bonded together. It forms an equilibrium mixture with nitrogen dioxide. The molecule is planar with an N-N bond distance of 1.78Å and N-O distances of 1.19Å. The N-N distance corresponds to a weak bond, since it is significantly longer than the average N-N single bond length of 1.45Å. This exceptionally weak σ bond (amounting to overlapping of the ''sp''2 hybrid orbitals of the two NO2 units) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Airbus Defence And Space
Airbus Defence and Space is the division of Airbus SE responsible for the development and manufacturing of the corporation's defence and space products, while also providing related services. The division was formed in January 2014 during the corporate restructuring of European Aeronautic Defence and Space (EADS), and comprises the former Airbus Military, Astrium, and Cassidian divisions. It is the world's second-largest space company after Boeing and one of the top ten defence companies in the world. Airbus Defence and Space has its corporate headquarters in Taufkirchen, Germany and is led by chief executive officer Michael Schoellhorn. The company has four core arms: * Military Aircraft, managed from Spain and led by Alberto Gutiérrez * Space Systems, managed from France and led by Jean-Marc Nasr * Communication-Intelligence-Security, managed from Germany and led by Evert Dudok * Unmanned Aerial Systems, also managed from Germany and led by Jana Rosenmann. With its pres ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Satellite Constellation
A satellite constellation is a group of artificial satellites working together as a system. Unlike a single satellite, a constellation can provide permanent global or near-global coverage, such that at any time everywhere on Earth at least one satellite is visible. Satellites are typically placed in sets of complementary orbital planes and connect to globally distributed ground stations. They may also use inter-satellite communication. Other satellite groups Satellite constellations should not be confused with: * ''satellite clusters'', which are groups of satellites moving very close together in almost identical orbits (see satellite formation flying); * '' satellite series'' or ''satellite programs'' (such as Landsat), which are generations of satellites launched in succession; * ''satellite fleets'', which are groups of satellites from the same manufacturer or operator that function independently from each other (not as a system). Overview Satellites in Medium Earth orbi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ArianeGroup
ArianeGroup (formerly Airbus Safran Launchers) is an aerospace company based in France. A joint venture between Airbus and Safran, the company was founded in 2015 and is headquartered in Issy-les-Moulineaux. It consists of three core arms: aerospace, defence and security. ArianeGroup is currently developing its next-generation two-stage Ariane 6 launch vehicle, intended to succeed the Ariane 5 rocket, which has been launched more than 110 times. The new vehicle will be offered in two variants that will be capable of carrying between 10,350 and 21,650 Kilogram, kilograms. The first launch of Ariane 6 is expected to occur in 2023. If the company's task is to develop and manufacture the launch vehicles, Arianespace acts as the launch service provider for them. Meanwhile, another subsidiary, ArianeWorks, is tasked with developing next-generation technologies like the reusable Themis rocket booster. ArianeGroup also notably manufactures France's M51 (missile), M51 thermonuclear weap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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