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Thaicom 5
Thaicom 5 was a geostationary communications satellite operated by Thaicom. It was used to provide communications services to Asia, Africa, Middle East, Americas, Europe and Australia. Overview Thaicom 5 was constructed by Alcatel Alenia Space, and is based on the Spacebus 3000A satellite bus, with a configuration identical to the Thaicom 3 satellite which it replaced. It was originally ordered as Thaicom 4, but sold to Agrani as Agrani 2 before completion. It was completed in 1997, and stored until June 2005 when it was cancelled and sold back to Thaicom. It was equipped with 25 G/H band (IEEE C band) and 14 J band (IEEE Ku band) transponders, and at launch it had a mass of , with an expected operational lifespan of 12 years. Thaicom 5 began experiencing technical difficulties in December 2019, causing Thaicom to duplicate some channels, including Korean Central Television, to neighboring satellites. Launch The satellite was launched on an Ariane 5ECA carrier rocket, cont ... [...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] |
Americas
The Americas, sometimes collectively called America, are a landmass comprising the totality of North America and South America.''Webster's New World College Dictionary'', 2010 by Wiley Publishing, Inc., Cleveland, Ohio. When viewed as a single continent, the Americas or America is the 2nd largest continent by area after Asia, and is the 3rd largest continent by population. The Americas make up most of the land in Earth's Western Hemisphere and comprise the New World. Along with their Lists of islands of the Americas, associated islands, the Americas cover 8% of Earth's total surface area and 28.4% of its land area. The topography is dominated by the American Cordillera, a long chain of mountains that runs the length of the west coast. The flatter eastern side of the Americas is dominated by large river basins, such as the Amazon basin, Amazon, St. Lawrence River–Great Lakes, Mississippi River System, Mississippi, and Río de la Plata Basin, La Plata basins. Since the Americ ... [...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] |
Thaicom 8
THAICOM 8 () is a Thai satellite of the THAICOM series, operated by Thaicom Public Limited Company, a subsidiary of INTOUCH, and is considered to be the 8th THAICOM satellite headquartered in Bangkok, Thailand. Overview Manufactured by Orbital ATK, the THAICOM 8 communications satellite will serve Thailand, India, and Africa from the 78.5° East geostationary location. It is equipped with 24 active Ku-band transponders for sending high-definition television signals through the satellite to residential dwellings. Launch THAICOM 8 was approved for launch into orbit on 18 March 2014. It was launched at the Cape Canaveral SLC-40 in Florida on 27 May 2016, by SpaceX. The first stage of the Falcon 9 used to launch THAICOM 8 successfully landed on ASDS - Of Course I Still Love You. It was the fourth successful landing of a Falcon 9 Full Thrust. Reuse of the Falcon 9 First Stage The B1023 first stage was later converted into a Falcon Heavy side booster, which performed a stat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thaicom 6
THAICOM 6 () is a Thai satellite of the Thaicom series, operated by Thaicom Public Company Limited, a subsidiary of INTOUCH headquartered in Bangkok, Thailand. THAICOM 6 is colocated with Thaicom 5 at 78.5 degrees East, in geostationary orbit. The total cost for the satellite is . Overview THAICOM 6 is a 3-axis stabilized spacecraft, carrying 18 active C-band transponders and 8 active Ku-band transponders. The Ku-band transponders are both addressed as well as beam-switched to broadband. THAICOM 6 provides communication service to Southeast Asia, Africa and Madagascar with its primary role being DTH service for Thailand. Launch The spacecraft was launched on 6 January 2014, by SpaceX on a Falcon 9 v1.1 launch vehicle. The payload was delivered by SpaceX to a -apogee supersynchronous elliptical transfer orbit that will later be reduced by the satellite builder Orbital Sciences Corporation to an approximately circular geostationary orbit. The supersynchronous transfer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Longitude
Longitude (, ) is a geographic coordinate that specifies the east- west position of a point on the surface of the Earth, or another celestial body. It is an angular measurement, usually expressed in degrees and denoted by the Greek letter lambda (λ). Meridians are imaginary semicircular lines running from pole to pole that connect points with the same longitude. The prime meridian defines 0° longitude; by convention the International Reference Meridian for the Earth passes near the Royal Observatory in Greenwich, south-east London on the island of Great Britain. Positive longitudes are east of the prime meridian, and negative ones are west. Because of the Earth's rotation, there is a close connection between longitude and time measurement. Scientifically precise local time varies with longitude: a difference of 15° longitude corresponds to a one-hour difference in local time, due to the differing position in relation to the Sun. Comparing local time to an absol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
S400 (rocket Engine)
The S400 is a family of pressure fed liquid propelled rocket engines manufactured by ArianeGroup (former Airbus DS) at the Orbital Propulsion Centre in Lampoldshausen, Germany. They burn MMH and MON as propellant, have a thrust range between and and can vary the O/F ratio between 1.50 and 1.80. The chamber and throat are made of a platinum alloy, which uses double cone vortex injectors and uses both film and radiative cooling. The S400 engines are used as primary apogee engines for telecommunication satellite platforms such as the Spacebus of Thales Alenia Space as well as space exploration missions such as Venus Express, ExoMars Trace Gas Orbiter or Jupiter Icy Moons Explorer. The S400 family has had an extensive history in the commercial telecommunication market. Its first launch was aboard the Symphonie 1 in 1974. This was the first commercial three-axis stabilized communications satellite in geostationary orbit with a bipropellant rocket A liquid-propellant rock ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geosynchronous Transfer Orbit
In space mission design, a geostationary transfer orbit (GTO) or geosynchronous transfer orbit is a highly elliptical type of geocentric orbit, usually with a perigee as low as low Earth orbit (LEO) and an apogee as high as geostationary orbit (GEO). Satellites that are destined for geosynchronous orbit (GSO) or GEO are often put into a GTO as an intermediate step for reaching their final orbit. Larson, Wiley J. and James R. Wertz, eds. Space Mission Design and Analysis, 2nd Edition. Published jointly by Microcosm, Inc. (Torrance, CA) and Kluwer Academic Publishers (Dordrecht/Boston/London). 1991. Manufacturers of launch vehicles often advertise the amount of payload the vehicle can put into GTO. Background Geostationary and geosynchronous orbits are very desirable for many communication and Earth observation satellites. However, the delta-v, and therefore financial, cost to send a spacecraft to such orbits is very high due to their high orbital radius. A GTO is an intermediary ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Satmex 6
Eutelsat 113 West A, formerly Satmex-6, is a geostationary communications satellite which is operated by Eutelsat. Originally built for Mexico's Satmex, it was launched in 2006. The satellite was acquired by Eutelsat in its 2014 merger with Satmex, and renamed ''Eutelsat 113 West A'' in May. It is used to provide communications services to the Americas, Hawaii and the Caribbean. Constructed by Space Systems/Loral, Satmex 6 is based on the LS-1300X satellite bus. It is equipped with 36 G/H band (IEEE C band) and 24 J band (IEEE Ku-band) transponders, and at launch it had a mass of , with an expected operational lifespan of 15 years. Arianespace was contracted to launch Satmex 6, using an Ariane 5ECA carrier rocket flying from ELA-3 at the Guiana Space Centre. The launch occurred at 21:09 GMT on 27 May 2006, and placed Satmex 6, along with the Thaicom 5 satellite, into a geosynchronous transfer orbit. At the time, this was the heaviest dual-satellite payload ever launched to geos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Korean Central Television
Korean Central Television (KCTV; ) is a North Korean television service operated by the Korean Central Broadcasting Committee, a state-owned broadcaster in North Korea. It is broadcast terrestrially via the Pyongyang TV Tower in Moranbong-guyok, Pyongyang, streamed via the government-run internet television service Manbang, and also uplinked via satellite. History KCTV was established on 1 September 1953, as Pyongyang Television after the Korean War ended. Kim Il Sung personally envisioned that the time was ripe for television broadcasting in North Korea, but this was not yet to happen. Thus, the young service began an 8-year period of preparation for commencement of television broadcasts, with the help of the national government. The station later was renamed as Central Television Broadcasting System in 1961, and conducted on 1 September the same year its first test broadcasts. The CTBS-DPRK officially began operations on 3 March 1963, at 19:00 (7:00 pm) KST based in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transponder
In telecommunications, a transponder is a device that, upon receiving a signal, emits a different signal in response. The term is a blend of ''transmitter'' and ''responder''. In air navigation or radio frequency identification, a flight transponder is an automated transceiver in an aircraft that emits a coded identifying signal in response to an interrogating received signal. In a communications satellite, a satellite transponder receives signals over a range of uplink frequencies, usually from a satellite ground station; the transponder amplifies them, and re-transmits them on a different set of downlink frequencies to receivers on Earth, often without changing the content of the received signal or signals. Satellite/broadcast communications A communications satellite’s channels are called transponders because each is a separate transceiver or repeater. With digital video data compression and multiplexing, several video and audio channels may travel through a single tr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Agrani
The Agrani river originates near Balwadi (बलवडी) on Khanapur plateau (Khanapur tehsil of Sangli district), near a small tree temple of great Agastya rishi (अगस्त्य ऋषी). After Vajrachounde (वज्रचौंडे) (Tasgaon tehsil), it turns and flows in a southeast direction. In Sangli district, it travels for 62 km (Khanapur tehsil- 22.5 km; Tasgaon tehsil- 14 km; KM tehsil- 25.5 km), after which, in Karnataka near Athani village it finally joins the Krishna River The Krishna River in the Deccan Plateau, Deccan plateau is the third-longest in India, after the Ganga, Ganga and Godavari. It is also the fourth-largest in terms of water inflows and river basin area in India, after the Ganga, Indus and Godav .... Agrani is proved to be lifeline of draught prone Kavathe Mahankal tehsil. The river has also been the subject of a major desilting project. Agrani river rejuvenation project is being implemented under Jalyukt S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
