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SkyTerra-1
SkyTerra (SKYT), formerly Mobile Satellite Ventures (MSV or MSVLP), was a Reston, Virginia company that developed telecommunications systems that integrate satellite and terrestrial radio communication technologies into one system. In March 2010, the company was acquired by Harbinger Capital Partners and under the leadership of CEO Sanjiv Ahuja became part of a new company called LightSquared. The company placed its first satellite, SkyTerra-1, in orbit on November 14, 2010. LightSquared has since then went bankrupt and emerged from bankruptcy as Ligado Networks. History The Corporation was founded in 1988 as American Mobile Satellite Corporation (AMSC), a consortium of several organizations originally dedicated to satellite broadcasting of telephone, fax, and data signals. Its acquisition of ARDIS was completed on March 31, 1998. On April 24, 2000, the company changed its name to Motient Corporation, with its stock traded on the NASDAQ National Market under the symbol "MTNT". MSV ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boeing 702
Boeing 702 is a communication satellite bus family designed and manufactured by the Boeing Satellite Development Center, and flown from the late-1990s into the 2020s. It covers satellites massing from to with power outputs from 3 to 18 kW and can carry up to approximately 100 high-power transponders. The baseline Boeing 702 is compatible with several orbital launch systems, including Atlas V, Ariane 5, Delta IV, Falcon 9, Proton, and the Sea Launch-operated Zenit 3SL. Platform versions After the introduction of the original 702 in 1997, the platform has been continually updated. New members of the platform have been introduced through the years, which allowed the common systems and approaches to span the whole range of mass and power for geosynchronous orbit satellites. The family currently spans four different members: the 702HP for high-power applications, the 702HP-GEO for mobile-telephone services, the 702MP for medium-power requirements and the 702SP for small satell ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reston, Virginia
Reston is a census-designated place in Fairfax County, Virginia and a principal city of the Washington metropolitan area. As of the 2020 U.S. Census, Reston's population was 63,226. Founded in 1964, Reston was influenced by the Garden City movement that emphasized planned, self-contained communities that intermingled green space, residential neighborhoods, and commercial development. The intent of Reston's founder, Robert E. Simon, was to build a town that would revolutionize post–World War II concepts of land use and residential/corporate development in suburban America. In 2018, Reston was ranked as the Best Place to Live in Virginia by ''Money'' magazine for its expanses of parks, lakes, golf courses, and bridle paths as well as the numerous shopping and dining opportunities in Reston Town Center. History In the early days of Colonial America, the land on which Reston sits was part of the Northern Neck Proprietary, a vast grant by King Charles II to Lord Thomas Fairfax t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Motient
TerreStar Corporation (TSTR), formerly Motient Corp. (MNCP - 2000–2007) and ''American Mobile Satellite Corp.'' (AMSC - 1988–2000), was the controlling shareholder of ''TerreStar Networks Inc.'', ''TerreStar National Services, Inc.'' and ''TerreStar Global Ltd.'', and a shareholder of SkyTerra Communications. ''TerreStar Networks'' was a Reston, Virginia-based company that operated integrated satellite and terrestrial telecommunications systems. The company declared bankruptcy in 2010 and is now owned by Dish Network. XM Satellite Radio was a spin-off of American Mobile Satellite Corp. TerreStar-1 Arianespace launched TerreStar-1 on the morning of July 1, 2009. With a launch mass of 6,910 kg, it has been deemed "the largest commercial telecommunications satellite ever launched." It was built by Space Systems/Loral and was launched from the Guiana Space Center with an Ariane 5 rocket in French Guiana. TerreStar-1 with the plan of providing mobile voice, messaging and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mobile-satellite Service
Mobile-satellite service (MSS, or mobile-satellite radiocommunication service) is – according to Article 1.25 of the International Telecommunication Union's Radio Regulations – "A radiocommunication service * between mobile earth stations and one or more space stations, or between space stations used by this service; or * between mobile earth stations by means of one or more space stations. This service may also include feeder links necessary for its operation." Details Most commercial voice and some data mobile satellite services are provided by systems operating in the L-band by Iridium, Inmarsat, Globalstar and Thuraya. The L-band spectrum allocated for MSS is between 1.5 and 2.5 GHz, with the upper portion often referred to as the S-band. Constellations of low earth orbiting (LEO) satellites are used by Iridium (66 satellites) and Globalstar (48 satellites). Inmarsat and Thuraya currently use 4 (i4) and 2 geostationary satellites respectively, their L-band services are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MEXSAT
The Mexican Satellite System, also known as MEXSAT, is a network of three satellites bought by the Mexican government's Ministry of Communications and Transportation. The three satellites are named Mexsat-1, Mexsat-2, and Mexsat-3. Subsequently, they have also been named Centenario, Morelos III and Bicentenario respectively. Mexsat-1 and Mexsat-2 are twin satellites for mobile communication devices and will operate in the electromagnetic frequencies of the L and Ku bands. Mexsat-3 will operate in the range of the extended C and Ku bands. Together these three satellites will form the whole system, operated by the Ministry of Communications and Transportation. The system is expected to meet the telecommunications needs of the whole country. Two control centres have been built in Hermosillo from which the new satellites will be operated. They were inaugurated by the then-president Felipe Calderón on 29 November 2012. History On 20 August 2009, the National Security Program of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Proton-M
The Proton-M, (Протон-М) GRAU index 8K82M or , is an expendable Russian heavy-lift launch vehicle derived from the Soviet-developed Proton. It is built by Khrunichev, and launched from sites 81 and 200 at the Baikonur Cosmodrome in Kazakhstan. Commercial launches are marketed by International Launch Services (ILS), and generally use Site 200/39. The first Proton-M launch occurred on 7 April 2001. Proton flew its most recent mission on 13 December 2021, launching two Ekspress communication satellites into geostationary orbit. As of August 2020, a number of Roscosmos and other Russian government missions remain on Proton launch manifest. Vehicle description The Proton-M launch vehicle consists of three stages; all of them powered by liquid rocket engines using the hypergolic propellant combination of dinitrogen tetroxide as the oxidizer, and unsymmetrical dimethylhydrazine for fuel. The first stage is unique in that it consists of a central cylindrical oxidizer tank ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Launch Services
International Launch Services, Inc. (ILS) is a joint venture with exclusive rights to the worldwide sale of commercial Angara and Proton rocket launch services. Proton launches take place at the Baikonur Cosmodrome in Kazakhstan while Angara is launched from the Plesetsk and Vostochny Cosmodrome in Russia. Ownership ILS was formed in 1995 as a private spaceflight partnership between Lockheed Martin (LM), Khrunichev and Energia. ILS initially co-marketed non-military launches on both the American Atlas and the Russian Proton expendable launch vehicles. With the Atlas V launch of the SES Astra 1KR satellite on 20 April 2006, ILS had made 100 launches, 97 of which were successful. In September 2006, Lockheed-Martin announced its intention to sell its ownership interests in Lockheed Khrunichev Energia International, Inc. (LKEI) and International Launch Services, Inc. (ILS) to Space Transport Inc. Space Transport Inc. was formed specifically for this transaction by Mario Lemme, who ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baikonur Cosmodrome
The Baikonur Cosmodrome ( kk, Байқоңыр ғарыш айлағы, translit=Baiqoñyr ğaryş ailağy, ; russian: Космодром Байконур, translit=Kosmodrom Baykonur, ) is a spaceport in an area of southern Kazakhstan leased to Russia. The Cosmodrome is the world's first spaceport for orbital and human launches and the largest (in area) operational Spaceport, space launch facility. All crewed Russian spaceflights are launched from Baikonur. The spaceport is in the Kazakh Steppe, desert steppe of Baikonur, about east of the Aral Sea and north of the river Syr Darya. It is near the Tyuratam railway station and is about above sea level. The spaceport is currently leased by the Government of Kazakhstan, Kazakh Government to the Russian Federation until 2050 and is managed jointly by the Roscosmos State Corporation, Roscosmos and the Russian Aerospace Forces. The shape of the area leased is an ellipse, measuring east–west by north–south, with the cosmodrome at ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cell Site
A cell site, cell tower, or cellular base station is a cellular-enabled mobile device site where antennas and electronic communications equipment are placed (typically on a radio mast, tower, or other raised structure) to create a cell, or adjacent cells, in a cellular network. The raised structure typically supports antenna and one or more sets of transmitter/receivers transceivers, digital signal processors, control electronics, a GPS receiver for timing (for CDMA2000/IS-95 or GSM systems), primary and backup electrical power sources, and sheltering. Multiple cellular providers often save money by mounting their antennas on a common shared mast; since separate systems use different frequencies, antennas can be located close together without interfering with each other. Some provider companies operate multiple cellular networks and similarly use colocated base stations for two or more cellular networks, ( CDMA2000 or GSM, for example). Some cities require that cell sites b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Federal Communications Commission
The Federal Communications Commission (FCC) is an independent agency of the United States federal government that regulates communications by radio, television, wire, satellite, and cable across the United States. The FCC maintains jurisdiction over the areas of broadband access, fair competition, radio frequency use, media responsibility, public safety, and homeland security. The FCC was formed by the Communications Act of 1934 to replace the radio regulation functions of the Federal Radio Commission. The FCC took over wire communication regulation from the Interstate Commerce Commission. The FCC's mandated jurisdiction covers the 50 states, the District of Columbia, and the territories of the United States. The FCC also provides varied degrees of cooperation, oversight, and leadership for similar communications bodies in other countries of North America. The FCC is funded entirely by regulatory fees. It has an estimated fiscal-2022 budget of US $388 million. It has 1,482 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mobile Phone
A mobile phone, cellular phone, cell phone, cellphone, handphone, hand phone or pocket phone, sometimes shortened to simply mobile, cell, or just phone, is a portable telephone that can make and receive calls over a radio frequency link while the user is moving within a telephone service area. The radio frequency link establishes a connection to the switching systems of a mobile phone operator, which provides access to the public switched telephone network (PSTN). Modern mobile telephone services use a cellular network architecture and, therefore, mobile telephones are called ''cellular telephones'' or ''cell phones'' in North America. In addition to telephony, digital mobile phones ( 2G) support a variety of other services, such as text messaging, multimedia messagIng, email, Internet access, short-range wireless communications (infrared, Bluetooth), business applications, video games and digital photography. Mobile phones offering only those capabilities are known as fea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thuraya
Thuraya ( ar, الثريا, Gulf Arabic pron.: ; from the Arabic name for the constellation of the Pleiades, ''Thurayya'') is a United Arab Emirates-based regional mobile-satellite service (MSS) provider. The company operates two geosynchronous satellites and provides telecommunications coverage in more than 161 countries in Europe, the Middle East, North, Central and East Africa, Asia and Australia. Thuraya's L-band network delivers voice and data services. Thuraya is the mobile satellite services subsidiary of Yahsat, a global satellite operator based in the United Arab Emirates, fully owned by Mubadala Investment Company. The geostationary nature of the service implies high round trip times from satellite to earth leading to a noticeable lag being present during voice calls. Services * Voice communications with satellite phones or fixed terminals * Short message service * 60 kbit/s downlink and 15 kbit/s uplink "GMPRS" mobile data service on Thuraya satellite phones * 444 kbi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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