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Astra 5B
Astra 5B (now called Astra 3C) is one of the Astra communications satellites owned and operated by SES. It was launched as SES' 56th satellite in March 2014, to the newest of the Astra orbital positions for direct-to-home (DTH) satellite television, at 31.5° East for DTH, DTT and cable use in Eastern Europe,. The satellite replaced the Astra 1G satellite at 31.5° East, which was itself filling in at that position after the loss of the Astra 5A satellite (originally called Sirius 2) in 2009, Astra 2C was first used at 31.5° East to replace Astra 5A, with Astra 1G positioned there in 2010. Astra 5B was the third satellite to be launched of four ordered together by SES from Astrium (now Airbus Defence and Space) in 2009.''SES Selects Astrium To Build Four D ... [...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] |
Ka Band
The Ka band (pronounced as either "kay-ay band" or "ka band") is a portion of the microwave part of the electromagnetic spectrum. The designation "Ka-band" is from Kurz-above, which stems from the German word ''kurz,'' meaning "short". There is no standard definition of Ka-band. IEEE Standard letter designations for Radar Bands define the nominal frequency range for Ka band in the range 27–40 gigahertz (GHz) in Tables 1 and 2 of IEEE Standard 521 i.e. wavelengths from slightly over one centimeter down to 7.5 millimeters. The ITU however approves Ka-band satellite networks in the 17.3-31 GHz frequency range, with most Ka-band satellite networks having uplinks in the 27.5–31 GHz and downlinks in the 17.7–21.2 GHz range. The band is called Ka, short for "K-above" because it is the upper part of the original (now obsolete) NATO K band, which was split into three bands because of the presence of the atmospheric water vapor resonance peak at 22.24 G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astra 28
Astra (Latin for "stars") may refer to: People * Astra (name) Places * Astra, Chubut, a village in Argentina * Astra (Isauria), a town of ancient Isauria, now in Turkey * Astra, one suggested name for a hypothetical fifth planet that became the asteroid belt Entertainment * Astra (Marvel Comics), the name of two otherwise unrelated Marvel Comics characters from 1977 and 1999, respectively * Astra (DC Comics) *Astra (2000 film), an Indian Kannada-language action drama film * ''Astra'' (2012 film), a Bengali film * Australian Subscription Television and Radio Association * ASTRA Awards, annual awards presented by the Australian subscription television industry * Astra, a character in the TV series ''Ultraman Leo'' Music * Astra Chamber Music Society, a Melbourne, Australia concert organization, formed in 1951 * Astra (band), an American psychedelic and progressive rock band * ''Astra'' (album), a 1985 release by Asia * ''Astra'', a 1990 composition by Charles Wuorinen Sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astra 2F
Astra 2F is one of the Astra communications satellites owned and operated by SES S.A., launched in September 2012 to the Astra 28.2°E orbital position. The satellite provides free-to-air and encrypted direct-to-home (DTH) digital television and satellite broadband services for Europe and Africa. Astra 2F is the first of three "second generation" satellites for the 28.2° East position which replace the first generation Astra 2A, Astra 2B and Astra 2D satellites previously positioned there. The second, Astra 2E, was launched in 2013 and the third, Astra 2G, was launched in 2014. Some parts of the construction of Astra 2F by Astrium (now Airbus Defence and Space) in Stevenage, United Kingdom could be seen in the BBC2 documentary programme, ''How To Build... A Satellite'' broadcast on 27 November 2011. Astra 2F was successfully launched from Kourou in French Guiana on 28 September 2012, at 21:18:07 UTC by an Ariane 5ECA launch vehicle from Centre Spatial Guyanais. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astra 2C
Astra 2C is one of the Astra communications satellites owned and operated by SES. Designed to join Astra 2A and Astra 2B at the Astra 28.2°E orbital position providing digital television and radio broadcast services to the United Kingdom and Ireland, the satellite was first used after launch in 2001 at 19.2° East for pan-European coverage. The satellite provides one broadcast beam with horizontal and vertical polarisation, across a single footprint covering the areas of Central and Eastern Europe, Scandinavia, the Iberian Peninsula and Canary Islands. TV signals can be received with a 50 cm dish across the majority of the British Isles with a 60 cm dish required in the extreme north and west. Astra 2C can also provide backup capacity, substituting for one or more transponders across the 10.70-12.20 GHz broadcast range used by Astra satellites in the Astra 19.2°E and Astra 28.2°E orbital positions. History Although originally intended for Astra 28.2° ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sirius (satellite)
Sirius was a constellation of communications satellites operated at 5.0° East in geostationary orbit (GEO) by NSAB (later SES Sirius, and now a non-autonomous part of SES, owner and operator of the Astra satellites). They carried digital satellite television to the countries of Scandinavia, Baltic states, Eastern Europe and Africa, including the Viasat pay TV system, along with several pay TV packages for Eastern Europe, the TopTV package for Africa, a number of Ukrainian channels and the national Latvian and Lithuanian channel service free-to-air. Satellites Sirius 4 A fourth satellite, Sirius 4, was ordered in 2005 and launched at 22:39:47 UTC on 17 November 2007. It carries 52 active Ku-band transponders and two active Ka-band transponders. Sirius 4 was built by Lockheed Martin Space Systems based upon the A2100AX design. Among the services carried are Viasat and Viasat Ukraine which has used the Sirius satellites for their digital platform since its laun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astra 5A
Astra 5A was one of the Astra communications satellites owned and operated by SES at the Astra 31.5°E. Launched in 1997 to the 5° East position by NSAB (Nordiska Satelit AB) (later SES Sirius, and now a non-autonomous part of SES) as Sirius 2, operation of the satellite was transferred to SES in April 2008 and the craft renamed and moved to 31.5° East to open up a new orbital position for the company for the development of markets in Central and Eastern Europe and the Middle East. Astra 5A failed in orbit in 2009. Sirius 2 / GE-1E Sirius 2 is a 32 transponder satellite, used for direct-to-home (DTH) transmissions as well as video and data communication services. Sirius 2 has two DTH beams, each with 13 transponders used for transmission of TV channels to homes equipped with parabolic antennas. One of the beams transmits to the Nordic area and the other towards central and southern Europe. GE AMERICOM, later SES Americom, operates 13 of the transponders in the Europea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astra 1G
Astra 1G was one of the Astra communications satellites owned and operated by SES. History SES ordered its Hughes 601HP satellite, in 1994 for Astra 1G. Astra 1G was retired to a graveyard orbit in 2023. Accessed 29 June 26 2023 Launch Astra-1G was launched on 2 December 1997 at 23:10:37 , by a / DM-2M launch vehicle, from[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Satellite Television
Satellite television is a service that delivers television programming to viewers by relaying it from a communications satellite orbiting the Earth directly to the viewer's location.ITU Radio Regulations, Section IV. Radio Stations and Systems – Article 1.39, definition: ''Broadcasting-satellite service'' The signals are received via an outdoor parabolic antenna commonly referred to as a satellite dish and a low-noise block downconverter. A satellite receiver decodes the desired television program for viewing on a television set. Receivers can be external set-top boxes, or a built-in television tuner. Satellite television provides a wide range of channels and services. It is usually the only television available in many remote geographic areas without terrestrial television or cable television service. Different receivers are required for the two types. Some transmissions and channels are unencrypted and therefore free-to-air, while many other channels are transmitted with enc ... [...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] |
Astra (satellites)
Astra is the brand name for a number of geostationary communication satellites, both individually and as a group, which are owned and operated by SES, a global satellite operator based in Betzdorf, in eastern Luxembourg. The name is also used to describe the pan-European broadcasting system provided by these satellites, the channels carried on them, and even the reception equipment. At the time of the launch of the first Astra satellite, Astra 1A in 1988, the satellite's operator was known as Société Européenne des Satellites ("European Satellite Company"). In 2001 SES Astra, a newly formed subsidiary of SES, operated the Astra satellites and in September 2011, SES Astra was consolidated back into the parent company, which by this time also operated other satellite families such as AMC, and NSS. Astra satellites broadcast 2,600 digital television channels (675 in high definition) via five main satellite orbital positions to households across Asia, Australia, Africa, Am ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
