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BGAN
The Broadband Global Area Network (BGAN) is a global satellite network with telephony owned by Inmarsat using portable terminals. The terminals are normally used to connect a laptop computer to broadband Internet in remote locations, although as long as line-of-sight to the satellite exists, the terminal can be used anywhere. The value of BGAN terminals is that, unlike other satellite Internet services, which require bulky and heavy satellite dishes to connect, a BGAN terminal is about the size of a laptop and thus can be carried easily. The network is provided by Inmarsat and uses three geostationary satellites called I-4 to provide almost global coverage. Details Downlink speeds of high-end BGAN terminals are up to 492 kbit/s, and upload speeds are up to 492 kbit/s - Best Effort as BGAN Background IP (BIP) is a contended (shared) channel. As with all geosynchronous satellite connections, latency is an issue. Typical latency is 0.6–1.5 seconds round trip for the Backg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
I-4 Satellite
Three I-4 satellites make up the INMARSAT BGAN, FleetBroadband and SwiftBroadband communications network. They provide Internet and telephony connections anywhere on Earth, except in polar regions. Data services Two general types of data service are currently provided: #Streaming #Background Streaming Streaming is a guaranteed delivery style of service. A terminal requests a context of X bandwidth (currently 8, 16, 32, 64, 128, or 256 kbit/s) and, if the current spot beam has enough resources available, it is allocated a guaranteed chunk of the available bandwidth. So if a request is made 8k streaming context, the terminal will, at all times, be able to send data at 8 kbit/s. As a result, streaming is billed based on time usage. Background Background is a best-effort style of service. Each spot beam provides a certain amount of usable bandwidth. The bandwidth which is not in use by Streaming contexts is used for Background contexts. This means that the actual amount of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Satellite Network
Radio communication service or radiocommunication service is according to Article 1.19 of the International Telecommunication Union, International Telecommunication Union's ITU Radio Regulations, Radio Regulations (ITU RR),ITU Radio Regulations, Section III – Radio services, Article 1.19, definition: Radiocommunication service defined as “a service…involving the Signal transmission, transmission, Emission (radiocommunications), emission and/or reception of radio waves for specific telecommunication purposes”. Radiocommunication is sub-divided into space and terrestrial radiocommunication. Space radiocommunication is defined in RR Article 1 as “any radiocommunication involving the use of one or more space stations or the use of one or more reflecting satellites or other objects in space”. Terrestrial radiocommunication is defined as “any radiocommunication other than space radiocommunication or radio astronomy”. Types Section III of Article 1 of the ITU Radio Regu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ethernet
Ethernet () is a family of wired computer networking technologies commonly used in local area networks (LAN), metropolitan area networks (MAN) and wide area networks (WAN). It was commercially introduced in 1980 and first standardized in 1983 as IEEE 802.3. Ethernet has since been refined to support higher bit rates, a greater number of nodes, and longer link distances, but retains much backward compatibility. Over time, Ethernet has largely replaced competing wired LAN technologies such as Token Ring, FDDI and ARCNET. The original 10BASE5 Ethernet uses coaxial cable as a shared medium, while the newer Ethernet variants use twisted pair and fiber optic links in conjunction with switches. Over the course of its history, Ethernet data transfer rates have been increased from the original to the latest , with rates up to under development. The Ethernet standards include several wiring and signaling variants of the OSI physical layer. Systems communicating over Ethernet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Globalstar
Globalstar, Inc. is an American satellite communications company that operates a low Earth orbit (LEO) satellite constellation for satellite phone and low-speed data communications. The Globalstar second-generation constellation consists of 24 low Earth orbiting (LEO) satellites. History The Globalstar project was launched in 1991 as a joint venture of Loral Corporation and Qualcomm. On March 24, 1994, the two sponsors announced the formation of Globalstar LP, a limited partnership established in the U.S., with financial participation from eight other companies, including Alcatel, AirTouch, Deutsche Aerospace, Hyundai, and Vodafone. At that time, the company predicted the system would launch in 1998, based on an investment of $1.8 billion. Globalstar received its US spectrum allocation from the FCC in January 1995 and continued to negotiate with other nations for rights to use the same radio frequencies in their countries. The first satellites were launched in February 1998, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iridium Satellite LLC
Iridium Communications Inc. (formerly Iridium Satellite LLC) is a publicly traded American company headquartered in McLean, Virginia. Iridium operates the Iridium satellite constellation, a system of 66 active satellites and 9 in-orbit spares used for worldwide voice and data communication from hand-held satellite phones and other transceiver units. The nearly polar orbit and communication between satellites via inter-satellite links provide global service availability. History The Iridium communications service was launched on November 1, 1998, formerly known as Iridium SSC. The first Iridium call was made by Vice President of the United States Al Gore to Gilbert Grosvenor, the great-grandson of Alexander Graham Bell and chairman of the National Geographic Society. Motorola provided the technology and major financial backing. The logo of the company represents the Big Dipper. The company derives its name from the chemical element iridium, which has an atomic number of 77, ... [...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] |
SES Broadband
SES Broadband (previously ASTRA2Connect) is a two-way satellite broadband Internet service available across Europe, which launched in March 2007, and uses the Astra series of geostationary satellites. SES Broadband is owned and operated by SES Broadband Services, a subsidiary of SES, based in Betzdorf, Luxembourg. SES Broadband provides high-speed Internet access (at up to 10 Mbit/s) at a flat rate cost to end users, along with Voice over IP, IPTV, and content-on-demand facilities, without any requirement for a landline, cable or terrestrial wireless connection. Until March 2012, SES Broadband was called 'ASTRA2Connect' and the operating company 'ASTRA Broadband Services'. The name was changed in line with the rebranding of parent company SES. Application The SES Broadband service makes broadband Internet access available to homes in rural locations or otherwise beyond the reach of existing terrestrial broadband services. Outside the major European urban centres, there ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
FleetBroadband
FleetBroadband is maritime satellite internet, telephony, SMS texting, and ISDN network for ocean-going vessels using portable domed terminal antennas. These antennas, and corresponding indoor controllers, are used to connect phones and laptop computers from sailing vessels with the rest of the world. All FleetBroadband antennas require line-of-sight to one of three geosynchronous orbit satellites thus allowing the terminal to be used anywhere, including on land. Details The FleetBroadband network was developed by Inmarsat and is composed of three geosynchronous orbiting satellites called I-4s that allow contiguous global coverage, except for the poles. FleetBroadband systems installed on vessels may travel from ocean to ocean without human interaction. Line-of-sight to the ''I-4'' satellites is required for connectivity, which can be achieved even in rough rolling seas. Since the FleetBroadband network uses the L band, rain fade is much less of an issue than VSAT or C B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tripoli, Libya
Tripoli (; ar, طرابلس الغرب, translit= Ṭarābulus al-Gharb , translation=Western Tripoli) is the capital and largest city of Libya, with a population of about 1.1 million people in 2019. It is located in the northwest of Libya on the edge of the desert, on a point of rocky land projecting into the Mediterranean Sea and forming a bay. It includes the port of Tripoli and the country's largest commercial and manufacturing center. It is also the site of the University of Tripoli. The vast barracks, which includes the former family estate of Muammar Gaddafi, is also located in the city. Colonel Gaddafi largely ruled the country from his residence in this barracks. Tripoli was founded in the 7th century BC by the Phoenicians, who gave it the Libyco-Berber name ( xpu, 𐤅𐤉𐤏𐤕, ) before passing into the hands of the Greek rulers of Cyrenaica as Oea ( grc-gre, Ὀία, ). Due to the city's long history, there are many sites of archeological signi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sky News
Sky News is a British free-to-air television news channel and organisation. Sky News is distributed via an English-language radio news service, and through online channels. It is owned by Sky Group, a division of Comcast. John Ryley is the head of Sky News, a role he has held since June 2006. In 2019, Sky News was named Royal Television Society News Channel of the Year, the 12th time it has held the award. The channel and its live streaming world news is available on its website, TV platforms, and online platforms such as YouTube and Apple TV, and various mobile devices and digital media players. A sister channel, Sky News Arabia, is operated as a joint venture with the Abu Dhabi Media Investment Corporation. A channel called Sky News International, simulcasting the UK channel directly but without British advertisements, is available in Europe, the Middle East, Africa, South Asia, Asia Pacific, Australia, and the Americas. Narrated segments (which generally cover lighter issu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
