|
Sevsat
SEVSAT is an acronym for Ship Equip VSAT, a maritime satellite broadband system from the Ship Equip Group with its head office in Norway. Ship Equip is a subsidiary of Inmarsat, a mobile satellite services operator. History SEVSAT was developed from 2000–2003, and was initially based on space segment allocations from Eutelsat and Stratos who had implemented the technology on some of their satellites. In 2004, Stratos closed down their maritime broadband division, and Ship Equip turned to the start-up space segment broker New Wave Broadband and satellite operator Intelsat. These two companies had independently decided to implement technology on the 907 satellite that covered central and northern Europe, where customers of Ship Equip were primarily located. From 2004–2006, while focusing primarily on its local markets in the offshore oil, gas and fisheries segments, the number of SEVSAT customers increased rapidly to over 100 installed systems early in 2006, and 200 syste ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
VSAT
A very-small-aperture terminal (VSAT) is a two-way satellite ground station with a dish antenna that is smaller than 3.8 meters. The majority of VSAT antennas range from 75 cm to 1.2 m. Bit rates, in most cases, range from 4 kbit/s up to 16 Mbit/s. VSATs access satellites in geosynchronous orbit or geostationary orbit to relay data from small remote Earth stations (terminals) to other terminals (in mesh topology) or master Earth station "hubs" (in star topology). VSATs are used to transmit narrowband data (e.g., point-of-sale transactions using credit cards, polling or RFID data, or SCADA), or broadband data (for the provision of satellite Internet access to remote locations, VoIP or video). VSATs are also used for transportable, on-the-move (utilising phased array antennas) or mobile maritime communications. History The concept of the geostationary orbit was originated by Russian theorist Konstantin Tsiolkovsky, who wrote articles on space travel around the beginning of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Finansavisen
''Finansavisen'' is a Norwegian language, Norwegian business newspaper published by Hegnar Media in Oslo, Norway. History and profile ''Finansavisen'' was first published on 1 October 1992 by Trygve Hegnar, who is also editor-in-chief. The paper has its headquarters in Oslo. It has also an associated online edition located at finansavisen.no. It has a right-wing and neoliberal political stance. The 1997 circulation of ''Finansavisen'' was 11,477 copies. The paper had a circulation of 23,274 copies in 2006. In 2013 the circulation of the paper was 24,742 copies. References External links Official website {{Authority control 1992 establishments in Norway Publications established in 1992 Norwegian-language newspapers Business newspapers Newspapers published in Oslo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cisco Routers
Cisco Systems, Inc., commonly known as Cisco, is an American-based multinational digital communications technology conglomerate corporation headquartered in San Jose, California. Cisco develops, manufactures, and sells networking hardware, software, telecommunications equipment and other high-technology services and products. Cisco specializes in specific tech markets, such as the Internet of Things (IoT), domain security, videoconferencing, and energy management with leading products including Webex, OpenDNS, XMPP, Jabber, Duo Security, and Cisco Jasper, Jasper. Cisco is one of the List of largest technology companies by revenue, largest technology companies in the world ranking 74 on the Fortune 100 with over $51 billion in revenue and nearly 80,000 employees. Cisco Systems was founded in December 1984 by Leonard Bosack and Sandy Lerner, two Stanford University computer scientists who had been instrumental in connecting computers at Stanford. They pioneered the concept o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Digital-to-analog Converter
In electronics, a digital-to-analog converter (DAC, D/A, D2A, or D-to-A) is a system that converts a digital signal into an analog signal. An analog-to-digital converter (ADC) performs the reverse function. There are several DAC architectures; the suitability of a DAC for a particular application is determined by figures of merit including: resolution, maximum sampling frequency and others. Digital-to-analog conversion can degrade a signal, so a DAC should be specified that has insignificant errors in terms of the application. DACs are commonly used in music players to convert digital data streams into analog audio signals. They are also used in televisions and mobile phones to convert digital video data into analog video signals. These two applications use DACs at opposite ends of the frequency/resolution trade-off. The audio DAC is a low-frequency, high-resolution type while the video DAC is a high-frequency low- to medium-resolution type. Due to the complexity a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Satellite Navigation
A satellite navigation or satnav system is a system that uses satellites to provide autonomous geo-spatial positioning. It allows satellite navigation devices to determine their location (longitude, latitude, and altitude/elevation) to high precision (within a few centimetres to metres) using time signals transmitted along a line of sight by radio from satellites. The system can be used for providing position, navigation or for tracking the position of something fitted with a receiver (satellite tracking). The signals also allow the electronic receiver to calculate the current local time to a high precision, which allows time synchronisation. These uses are collectively known as Positioning, Navigation and Timing (PNT). One set of critical vulnerabilities in satellite communications are the signals that govern positioning, navigation and timing (PNT). Failure to properly secure these transmissions could not only disrupt satellite networks but wreak havoc on a host of dependent s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Modem
A modulator-demodulator or modem is a computer hardware device that converts data from a digital format into a format suitable for an analog transmission medium such as telephone or radio. A modem transmits data by Modulation#Digital modulation methods, modulating one or more carrier wave signals to encode digital information, while the receiver Demodulation, demodulates the signal to recreate the original digital information. The goal is to produce a Signal (electronics), signal that can be transmitted easily and decoded reliably. Modems can be used with almost any means of transmitting analog signals, from light-emitting diodes to radio. Early modems were devices that used audible sounds suitable for transmission over traditional telephone systems and leased lines. These generally operated at 110 or 300 bits per second (bit/s), and the connection between devices was normally manual, using an attached telephone handset. By the 1970s, higher speeds of 1,200 and 2,400 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ku Band
The Ku band () is the portion of the electromagnetic spectrum in the microwave range of frequencies from 12 to 18 gigahertz (GHz). The symbol is short for "K-under" (originally german: Kurz-unten), because it is the lower part of the original NATO K band, which was split into three bands (Ku, K, and Ka) because of the presence of the atmospheric water vapor resonance peak at 22.24 GHz, (1.35 cm) which made the center unusable for long range transmission. In radar applications, it ranges from 12 to 18 GHz according to the formal definition of radar frequency band nomenclature in IEEE Standard 521–2002. Ku band is primarily used for satellite communications, most notably the downlink used by direct broadcast satellites to broadcast satellite television, and for specific applications such as NASA's Tracking Data Relay Satellite used for International Space Station (ISS) communications and SpaceX Starlink satellites. Ku band satellites are also used for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
C Band (IEEE)
The C band is a designation by the Institute of Electrical and Electronics Engineers (IEEE) for a portion of the electromagnetic spectrum in the microwave range of frequencies ranging from 4.0 to 8.0 gigahertz (GHz). However, the U.S. Federal Communications Commission C band proceeding and auction, designated 3.7–4.2 GHz as C band. The C band is used for many satellite communications transmissions, some Wi-Fi devices, some cordless telephones, as well as some Radar and weather radar systems. Use in satellite communication The communications C band was the first frequency band that was allocated for commercial telecommunications via satellites. The same frequencies were already in use for terrestrial microwave radio relay chains. Nearly all C-band communication satellites use the band of frequencies from 3.7 to 4.2 GHz for their downlinks, and the band of frequencies from 5.925 to 6.425 GHz for their uplinks. Note that by using the band from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sunnmørsposten
''Sunnmørsposten'' () is a newspaper published by Polaris Media in Ålesund, Norway. History and profile In its early days, ''Sunnmørsposten'' competed with several other local newspapers, including '' Aalesunds Avis'' (1917–1957), '' Aalesunds blad'' (1871–1895), ''Aalesunds Handels- og Sjøfartstidende'' (1857–1904), ''Aalesunds Socialdemokrat'' (1908–1910), and ''Arbeidernes blad'' (1898). Until May 2006 ''Sunnmørsposten'' was published in broadsheet format. At the time of its transition to compact format, it was one of the last newspapers in Norway to be published in broadsheet. Published in compact format ( tabloid) six days a week, the paper consists of two sections; one for local news, sports and classified ads, and one for culture, weather, opinions and editorials and obituaries. On Saturdays they print a third weekend-section. Mecom owned ''Sunnmorsposten'' until February 2009 when it was sold to the Polaris Media. In 2012 ''Sunnmorsposten'' launched a pro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Space Segment
The space segment of an artificial satellite system is one of its three operational components (the others being the user and ground segments). It comprises the satellite or satellite constellation and the uplink and downlink satellite links. The overall design of the payload, satellite, ground segment, and end-to-end system is a complex task. Satellite communications payload design must be properly coupled with the capabilities and interaction with the spacecraft bus that provides power, stability and environmental support to the payload. Telecommunications satellites Geostationary Earth orbit (GEO) supports businesses in satellite television and radio broadcasting, as well as data and mobile communications. The medium Earth orbit (MEO) and low Earth orbit (LEO) configurations can also be used for various applications. A communications satellite is composed of a communications payload (repeater and antenna) and supporting spacecraft bus (including solar arrays and batteries, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vizada
Vizada is a worldwide satellite communications service provider which operates earth ground stations that connect satellite communications to terrestrial telecommunications and IP networks. Vizada provides both mobile and fixed satellite telecommunications to a wide array of markets including merchant shipping, defense and government, fishing and yachting, oil and gas, mining, and non-governmental organizations. The product offering covers maritime, land, and aeronautical services. In 2011, the Vizada Group was acquired by EADS, to be integrated as a subsidiary of Astrium. History Vizada has a long history which includes the acquisitions and reorganizations of several leading global telecommunications entities including France Telecom and Telenor, as well as vertically-specialized companies such as Sait Communications and TDCom. 1940s: The company was involved in maritime communications from World War II, when it began operating a network of radio communications in Europe. 19 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
