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AMC-21
AMC-21, or GE-21, is an American communications satellite operated by SES S.A., formerly SES World Skies and SES Americom. It was launched in August 2008 and is expected to remain in service for approximately 15 years. It is currently located at 125° West longitude. Spacecraft and mission design AMC-21 is based on a STAR-2 satellite bus that provides 4.4 kilowatts of power for the communications payload. The platform will support a 15-year on-orbit mission life. It carries 24 Ku-band transponders at 36 MHz, which will be used to broadcast television signals to Canada, United States, Mexico, the Caribbean, and Central America. Manufacture Thales Alenia Space was the prime contractor for AMC-21, and provided the satellite's communications payload. The STAR-2 bus was subcontracted to Orbital Sciences Corporation, as were integration and testing of the satellite. As prime contractor, Thales Alenia Space delivered the completed satellite to SES Americom. Launch AMC-21 w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ELA-3
ELA-3 () is a launch complex at the Guiana Space Centre in French Guiana. The complex was first used in June 1996 in support of the now retired Ariane 5 Ariane 5 is a retired European heavy-lift space launch vehicle operated by Arianespace for the European Space Agency (ESA). It was launched from the Guiana Space Centre (CSG) in French Guiana. It was used to deliver payloads into geostationar ... rocket. It is currently being refurbished to support Vega E launches. The complex is in size. Launch history Launch graph Launch chart References {{Ariane Guiana Space Centre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SES Americom
SES Americom was a major commercial satellite operator of North American geosynchronous satellites based in the United States. The company started as RCA Americom in 1975 before being bought by General Electric in 1986 and then later acquired by SES in 2001. In September 2009, SES Americom and SES New Skies merged into SES World Skies. History RCA American Communications (RCA Americom) was founded in 1975 as an operator of RCA Astro Electronics-built satellites. The company's first satellite; Satcom 1, was launched on 12 December 1975. Satcom 1 was one of the earliest geostationary satellites. Satcom 1 was instrumental in helping early cable TV channels (such as Superstation TBS and CBN) to become initially successful, because these channels distributed their programming to all of the local cable TV headends using the satellite. Additionally, it was the first satellite used by broadcast TV networks in the United States, like American Broadcasting Company (ABC), NBC, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ariane 5
Ariane 5 is a retired European heavy-lift space launch vehicle operated by Arianespace for the European Space Agency (ESA). It was launched from the Guiana Space Centre (CSG) in French Guiana. It was used to deliver payloads into geostationary transfer orbit (GTO), low Earth orbit (LEO) or further into space. The launch vehicle had a streak of 82 consecutive successful launches between 9 April 2003 and 12 December 2017. Since 2014, Ariane 6, a direct successor system, first launched in 2024. The system was designed as an expendable launch vehicle by the ''Centre national d'études spatiales'' (CNES), the French government's space agency, in cooperation with various European partners. Despite not being a direct derivative of its predecessor launch vehicle program, it was classified as part of the Ariane rocket family. Aérospatiale, and later ArianeGroup, was the prime contractor for the manufacturing of the vehicles, leading a multi-country consortium of other European con ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SES (company)
SES S.A. is a Luxembourgish communications satellite operator supplying video and data connectivity worldwide to broadcasters, content and internet service providers, mobile and fixed network operators, governments and institutions.''ACCELERATING BEYOND FRONTIERS'' SES Company Brochure. October 2017. Accessed 30 March 2018 SES owns and operate over 70 satellites in two different orbits: geostationary orbit (GEO) and medium Earth orbit (MEO). These include European Astra (satellite), Astra TV satellites, the O3b and O3b mPOWER data satellites and others with names including SES Americom, AMC, Ciel Satellite Group, Ciel, SES World Skies, NSS, QuetzSat 1, Quetzsat, Al Yah Satellite Communications, YahSat and List of SES satellites, SES. In April 2024, SES announced the ac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
GEOStar-2
The STAR-2 Bus is a fully redundant, flight-proven, spacecraft bus designed for geosynchronous missions. It is a satellite platform, designed and developed by Thomas van der Heyden for the Indonesian Cakrawarta satellite program in the early 1990s, now manufactured by Northrop Grumman Innovation Systems with an apogee kick motor to place a communications satellite into geostationary orbit, a thruster to provide the satellite with orbital station-keeping for a 15-year mission, and solar arrays to provide the satellite payload with 5 kW of electrical power. Advantages NGIS's GEOStar-2 bus design is unique within the satellite industry. NGIS's GEOStar-2 bus provides an affordable low-to-medium power satellite platform that is ideal for missions of this size. Rather than being a less efficient version of a larger, heavier product, NGIS's GEOStar-2 bus is designed specifically for the 1000 to 5550 watts payload class. Design The GEOStar-2 bus satellite is a modular, mass ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AMC-18
AMC-18 is a geostationary Lockheed Martin A2100A communications satellite owned by SES Americom. It was launched on 8 December 2006 from Centre Spatial Guyanais aboard an Ariane 5 ECA launch vehicle and is situated at 83° West longitude, providing coverage of North America with twenty-four C-band transponders of 12–18 watts each. Future users in May 2007 include The CW Television Network, NASA TV and Canadian Broadcasting Corporation, among other services. AMC-18 is used by thousands of terrestrial radio stations for network feeds using ground equipment from Starguide, X-Digital Systems, Wegener and International Datacasting. Major tenants are Cumulus Media Networks Satellite Services (which includes Citadel Media, Westwood One Networks, Talk Radio Network, WOR Radio Network and others), Skyview Networks (which includes ABC News, ABC Radio, California News Network, Arizona News Network, numerous Professional and Collegian Sports networks, and others), Orbital Media Networks ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orbital Sciences Corporation
Orbital Sciences Corporation (commonly referred to as Orbital) was an American company specializing in the design, manufacture, and launch of small- and medium- class space and launch vehicle systems for commercial, military and other government customers. In 2014, Orbital merged with Alliant Techsystems (ATK) to create a new company called Orbital ATK, which in turn was purchased by Northrop Grumman in 2018. Orbital was headquartered in Dulles, Virginia and publicly traded on the New York Stock Exchange with the ticker symbol ORB. Orbital's primary products were satellites and launch vehicles, including low Earth orbit (LEO), geosynchronous Earth orbit and planetary spacecraft for communications, remote sensing, scientific and defense missions; ground- and air-launched launch vehicles that delivered satellites into orbit; missile defense systems that were used as interceptor and target vehicles; and human-rated space systems for Earth orbit, lunar and other missions. Orbital ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Superbird-C2
Superbird-C2, known as Superbird-7 before launch, is a geostationary communications satellite operated by JSAT Corporation and designed and manufactured by Mitsubishi Electric (MELCO) on the DS2000 satellite bus. It had a launch weight of , a 15-year design life and was the first commercial communications satellite built in Japan. Its payload is composed of 28 Ku-band transponders with a total bandwidth of 828 MHz. It was originally ordered by Space Communications Corporation (SCC), owned by the Mitsubishi Group keiretsu, also the parent company of MELCO, but it was later merged and absorbed by JSAT Corporation. By the time of the actual launch it was a fully used Superbird-C2 as a replacement for Superbird-C to provide communications services to Japan, East Asia and the Pacific Ocean. History In April 2005, Space Communications Corporation (SCC) issued an Request for proposal (RFP) for Superbird-7, a spacecraft destined to replace the aging Superbird-C. On 28 Jun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Communications Satellite
A communications satellite is an artificial satellite that relays and amplifies radio telecommunication signals via a Transponder (satellite communications), transponder; it creates a communication channel between a source transmitter and a Radio receiver, receiver at different locations on Earth. Communications satellites are used for television, telephone, radio, internet, and military applications. Many communications satellites are in geostationary orbit above the equator, so that the satellite appears stationary at the same point in the sky; therefore the satellite dish antennas of ground stations can be aimed permanently at that spot and do not have to move to track the satellite. Others form satellite constellations in low Earth orbit, where antennas on the ground have to follow the position of the satellites and switch between satellites frequently. The radio waves used for telecommunications links travel by Line-of-sight propagation, line of sight and so are obstructe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Satellite Bus
A satellite bus (or spacecraft bus) is the main body and structural component of a satellite or spacecraft, in which the payload and all scientific instruments are held. Bus-derived satellites are less customized than specially-produced satellites, but have specific equipment added to meet customer requirements, for example with specialized sensors or transponders, in order to achieve a specific mission. They are commonly used for geosynchronous satellites, particularly communications satellites, but are most commonly used in spacecraft which occupy low Earth orbit missions. Examples Some satellite bus examples include: * Boeing DS&S 702 * Lockheed Martin Space Systems A2100 * Moog Inc. SL-OMV, Meteor, Meteorite * * INVAP ARSAT-3K * Airbus D&S Eurostar * ISRO's I-1K, I-2K, I-3K, I-4K, I-6K, and Indian Mini Satellite bus * NASA Ames MCSB * SSL 1300 * family * Orbital ATK Star Bus family, inc GEOStar * Mitsubishi Electric DS2000 * Spacecraft bus of the Jam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Communications Satellite
A communications satellite is an artificial satellite that relays and amplifies radio telecommunication signals via a Transponder (satellite communications), transponder; it creates a communication channel between a source transmitter and a Radio receiver, receiver at different locations on Earth. Communications satellites are used for television, telephone, radio, internet, and military applications. Many communications satellites are in geostationary orbit above the equator, so that the satellite appears stationary at the same point in the sky; therefore the satellite dish antennas of ground stations can be aimed permanently at that spot and do not have to move to track the satellite. Others form satellite constellations in low Earth orbit, where antennas on the ground have to follow the position of the satellites and switch between satellites frequently. The radio waves used for telecommunications links travel by Line-of-sight propagation, line of sight and so are obstructe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
