|
Star One C1
Star One C1 is a Brazilian communications satellite. It was launched on 14 November 2007 by an Ariane 5ECA carrier rocket, as part of a dual-payload launch with Skynet 5B. It was built by Thales Alenia Space, based on the Spacebus-3000B3 satellite bus. It is operated by Star One, a subsidiary of Embratel. Overview It was launched atop an Ariane 5-ECA rocket at 22:06 UTC on November 14, 2007. This launch had previously been delayed from November 9 due to a problem with the rocket, and then from November 12 due to a problem with the launch pad. Star One C1 was built by Thales Alenia Space based on a Spacebus 3000 B3 platform. It has 28 C-band transponders, 14 Ku-band transponders and one X-band transponder, and weighed about at launch. See also * Star One (satellite operator) * Star One C2 Star One C2 is a Brazilian communications satellite. It was launched on 18 April 2008 22:17 UTC by an Ariane 5ECA carrier rocket, as part of a dual-payload launch with Vinasat-1. It was ... [...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] |
J Band (NATO)
The NATO J band is the designation given to the radio frequencies from 10 to 20 GHz (equivalent to wavelength In physics and mathematics, wavelength or spatial period of a wave or periodic function is the distance over which the wave's shape repeats. In other words, it is the distance between consecutive corresponding points of the same ''phase (waves ...s between 3 and 1.5 cm). Since 1992 frequency allocations, allotment and assignments are in line to NATO Joint Civil/Military Frequency Agreement (NJFA). However, in order to identify military radio spectrum requirements, e.g. for crises management planning, training, Electronic warfare activities, or in military operations, this system is still in use. References Radio spectrum {{Wireless-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spacecraft Launched In 2007
A spacecraft is a vehicle that is designed to fly and operate in outer space. Spacecraft are used for a variety of purposes, including communications, Earth observation, meteorology, navigation, space colonization, planetary exploration, and transportation of humans and cargo. All spacecraft except single-stage-to-orbit vehicles cannot get into space on their own, and require a launch vehicle (carrier rocket). On a sub-orbital spaceflight, a space vehicle enters space and then returns to the surface without having gained sufficient energy or velocity to make a full Earth orbit. For orbital spaceflights, spacecraft enter closed orbits around the Earth or around other celestial bodies. Spacecraft used for human spaceflight carry people on board as crew or passengers from start or on orbit (space stations) only, whereas those used for robotic space missions operate either autonomously or telerobotically. Robotic spacecraft used to support scientific research are spa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Communications Satellites In Geostationary Orbit
Communication is commonly defined as the transmission of information. Its precise definition is disputed and there are disagreements about whether unintentional or failed transmissions are included and whether communication not only transmits meaning but also creates it. Models of communication are simplified overviews of its main components and their interactions. Many models include the idea that a source uses a coding system to express information in the form of a message. The message is sent through a channel to a receiver who has to decode it to understand it. The main field of inquiry investigating communication is called communication studies. A common way to classify communication is by whether information is exchanged between humans, members of other species, or non-living entities such as computers. For human communication, a central contrast is between verbal and non-verbal communication. Verbal communication involves the exchange of messages in linguistic form ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Star One C3
Star One C3 is a communications satellite operated by Star One, a subsidiary of Embratel. It was built by Orbital Sciences Corporation based on the STAR-2 satellite bus, and was launched on 10 November 2012 21:05 UTC by an Ariane 5ECA carrier rocket, as part of a dual-payload launch with Eutelsat 21B. Star One C3 will replace Brasilsat B3 in the 75° W position. The launch mass was 3226.6 kg. See also * Star One (satellite operator) * Star One C1 * Star One C2 Star One C2 is a Brazilian communications satellite. It was launched on 18 April 2008 22:17 UTC by an Ariane 5ECA carrier rocket, as part of a dual-payload launch with Vinasat-1. It was built by Thales Alenia Space, based on the Spacebus-3000B3 ... References External links Arianespace launch press kitStar One C3 coverage mapsas files. Star One C3 coverage mapson Google Maps. Star One C3 realtime tracking Communications satellites in geosynchronous orbit Spacecraft launched in 2012 Satellites using ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Star One C2
Star One C2 is a Brazilian communications satellite. It was launched on 18 April 2008 22:17 UTC by an Ariane 5ECA carrier rocket, as part of a dual-payload launch with Vinasat-1. It was built by Thales Alenia Space, based on the Spacebus-3000B3 satellite bus. It is operated by Star One, a subsidiary of Embratel, and Bolivarsat. Overview On June 2, 2008, Star One C2 replaced BrasilSat B4 in the task of broadcasting the main Brazilian TV network channels. This position, at 70.0° W, had been once occupied by Brasilsat B1. Since December 2008, Star One C2 transmits the Claro TV pay TV package. The service is supplied by Embratel and Claro companies and operates in Ku band. See also * Star One (satellite operator) Embratel Star One is a Brazilian communication satellite company. It is a subsidiary of Embratel. History Embratel Star One was created in December 2000, as an arm of Embratel in the area of operation and administration of satellites. S ... * Star One C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rocket
A rocket (from , and so named for its shape) is a vehicle that uses jet propulsion to accelerate without using any surrounding air. A rocket engine produces thrust by reaction to exhaust expelled at high speed. Rocket engines work entirely from propellant carried within the vehicle; therefore a rocket can fly in the vacuum of space. Rockets work more efficiently in a vacuum and incur a loss of thrust due to the opposing pressure of the atmosphere. Multistage rockets are capable of attaining escape velocity from Earth and therefore can achieve unlimited maximum altitude. Compared with airbreathing engines, rockets are lightweight and powerful and capable of generating large accelerations. To control their flight, rockets rely on momentum, airfoils, auxiliary reaction engines, gimballed thrust, momentum wheels, deflection of the exhaust stream, propellant flow, spin, or gravity. Rockets for military and recreational uses date back to at least 13th-century China. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Embratel
Embratel is a major Brazilian telecommunications company headquartered in Rio de Janeiro. The company was the long distance arm of Telebras until it was bought by the U.S. company MCI Communications for 2.65 billion reais during the 1998 break-up of Telebras. However, MCI Communications went bankrupt in 2003. Since 2003, it is owned by América Móvil, the Mexican telecommunications giant. Embratel is a major player in both voice and data communication in Brazil. The company owns a fully digitized microwave communications and fiber optic networks as well as eight domestic communication satellites. The company is a member of the Intelsat and Inmarsat organizations and it owns four fiber optics submarine cable systems - UNISUR, Americas II, Atlantis-2 and Columbus III. In 2013, Embratel started to sponsor the tennisman Thomaz Bellucci. Embratel's stock was traded on BM&F Bovespa. In Heraldry Some of the company's equipment is represented on the coat of arms of Tanguá ... [...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] |
Skynet 5B
Skynet 5B is a military communications satellite operated by Astrium Services, formerly Paradigm Secure Communications, on behalf of the British Ministry of Defence. It was the second of four Skynet 5 satellites to be launched. Spacecraft The Skynet 5B spacecraft is a Eurostar 3000S satellite, constructed by Astrium Astrium was a European aerospace company and subsidiary of the European Aeronautic Defence and Space Company (EADS), headquartered in Paris. It designed, developed and manufactured civil and military space systems and provided related services .... At launch it had a mass of approximately , with a design life of 15 years. Its solar arrays will generate a minimum of 6 kilowatts to power its UHF and X-band communications systems. The Skynet 5 constellation was originally intended to consist of two satellites, the other of which, Skynet 5A, was launched earlier in 2007. By the time of Skynet 5B's launch, a decision had been made to launch the backup spacecraft, Sk ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
I Band (NATO)
The NATO I band is the obsolete designation given to the radio frequencies from 8,000 to 10,000 MHz (equivalent to wavelengths between 3.75 and 3 cm) during the Cold War The Cold War was a period of global Geopolitics, geopolitical rivalry between the United States (US) and the Soviet Union (USSR) and their respective allies, the capitalist Western Bloc and communist Eastern Bloc, which lasted from 1947 unt ... period. Since 1992, frequency allocations, allotment and assignments are in line with the NATO Joint Civil/Military Frequency Agreement (NJFA). However, in order to identify military radio spectrum requirements, e.g. for crisis management planning, training, electronic warfare activities, or in military operations, this system is still in use. References Radio spectrum Microwave bands {{Wireless-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
X-band
The X band is the designation for a band of frequency, frequencies in the microwave radio region of the electromagnetic spectrum. In some cases, such as in communication engineering, the frequency range of the X band is set at approximately 7.0–11.2 GHz. In radar engineering, the frequency range is specified by the Institute of Electrical and Electronics Engineers (IEEE) as 8.0–12.0 GHz. The X band is used for radar, satellite communication, and wireless networking, wireless computer networks. Radar X band is used in radar applications, including continuous wave, continuous-wave, pulsed, single-polarization (waves), polarization, dual-polarization, synthetic aperture radar, and phased arrays. X-band radar frequency sub-bands are used in civilian, civil, armed force, military, and government institutions for weather radar, weather monitoring, air traffic control, Vessel Traffic Service, maritime vessel traffic control, Fire-control radar, defense tracking, and R ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
