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Telecommunications In Antarctica
Telecommunications in Antarctica is provided by the organization that have established research stations on the continent. Antarctica is not formally designated by the International Telecommunication Union (ITU) in any of the world zones. Communication infrastructure is provided through service providers in each country that administers each base. Telephone communication United States bases * Telephones – main lines in use: 0 (note: information for US bases only, 2001) * Telephones – mobile cellular: Argentine bases have GSM networks provided by Argentinean carriers Claro and Movistar; Iridium system in use * Telephone system ** ''general assessment:'' local systems at some research stations ** ''domestic:'' N/A ** ''international:'' via satellite from some research stations Australian and New Zealand stations Five locations (Casey Station (AU), Davis Station (AU), Macquarie Island Station (AU), Mawson Station (AU) and Scott Base (NZ)) all have telephone connections that enab ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antarctica
Antarctica () is Earth's southernmost and least-populated continent. Situated almost entirely south of the Antarctic Circle and surrounded by the Southern Ocean, it contains the geographic South Pole. Antarctica is the fifth-largest continent, being about 40% larger than Europe, and has an area of . Most of Antarctica is covered by the Antarctic ice sheet, with an average thickness of . Antarctica is, on average, the coldest, driest, and windiest of the continents, and it has the highest average elevation. It is mainly a polar desert, with annual precipitation of over along the coast and far less inland. About 70% of the world's freshwater reserves are frozen in Antarctica, which, if melted, would raise global sea levels by almost . Antarctica holds the record for the lowest measured temperature on Earth, . The coastal regions can reach temperatures over in summer. Native species of animals include mites, nematodes, penguins, seals and tardigrades. Where vegetation o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spark NZ
Spark New Zealand Limited is a New Zealand telecommunications company providing fixed-line telephone services, a mobile phone network, internet access services, and (through its Spark Digital division) ICT services to businesses. It was known as Telecom New Zealand until it was rebranded with its current name in 2014. It has operated as a publicly traded company since 1990. Spark is the second-largest wireless carrier in New Zealand, with 2.3 million subscribers as of July 2017. Spark is one of the largest companies by value on the New Zealand Exchange (NZX). As of 2007, it was the 39th largest telecommunications company in the OECD. The company is part of New Zealand Telecommunications Forum. Telecom New Zealand was formed in 1987 from a division of the New Zealand Post Office, and privatised in 1990. In 2008, Telecom was operationally separated into three divisions under local loop unbundling initiatives by central government – Telecom Retail; Telecom Wholesale; and Ch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asuka Station (Antarctica)
The is a permanent Japanese Antarctic unmanned observation base. It is located on Queen Maud Land and was opened in 1985. See also * List of Antarctic research stations * List of Antarctic field camps Many Antarctic research stations support satellite field camps which are, in general, seasonal camps. The type of field camp can vary – some are permanent structures used during the annual Antarctic summer, whereas others are little more than te ... References Japanese Antarctic Program Princess Ragnhild Coast Outposts of Queen Maud Land 1985 establishments in Antarctica {{QueenMaudLand-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Artigas Base
The General Artigas Station ( es, Base Científica Antártica Artigas), also referred to as the Artigas Base is the larger of the two Uruguayan scientific research stations in Antarctica, the other one being Elichiribehety Base. It is one of the 68 bases in Antarctica. Organization The Artigas Base depends on the Uruguayan Antarctic Institute Plans & Operations Direction which is ruled by an Interministerial Council, with delegates of MoD, Foreign Affairs and ministry of Education and Culture. Uruguay, a Consultative member of Antarctic Treaty since 7 October 1985, has a permanent, active and autonomous activity as a National Governmental Program in Antarctic. It comes to effect operating an all year round station in King George Island, South Shetland, and seasonally at Antarctic Peninsula, and onboard its vessel, where performs scientific activity based on SCAR & Treaty needs and recommendations, supported by own logistic sea and air transport, and operating under COMNAP g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Almirante Brown Antarctic Base
Brown Station ( es, Estación Científica Almirante Brown, or more often ''Base Brown'' or ''Estación Brown'') is an Argentine Antarctic base and scientific research station named after Admiral William Brown, the father of the Argentine Navy. It is located on Sanavirón Peninsula along Paradise Harbor, Danco Coast, in Graham Land, Antarctic Peninsula. Brown is one of 13 research bases in Antarctica operated by Argentina. From 1951 to 1984 it served as a permanent base; since then it is open during the summer season only. History Brown Station dates to 6 April 1951, when Argentina established the ''Almirante Brown'' Naval Detachment at Paradise Harbor. The Argentine Antarctic Institute took over the station in 1964–65, creating one of the most complete biology laboratories on the Antarctic Peninsula. It included a main house of ; two folding fuel tanks; and an additional building exclusive for scientific research, equipped with three labs, photography workshop, emer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amateur Radio Satellite
An amateur radio satellite is an artificial satellite built and used by amateur radio operators. It forms part of the Amateur-satellite service. These satellites use amateur radio frequency allocations to facilitate communication between amateur radio stations. Many amateur satellites receive an OSCAR designation, which is an acronym for Orbiting Satellite Carrying Amateur Radio. The designation is assigned by AMSAT, an organization which promotes the development and launch of amateur radio satellites. Because of the prevalence of this designation, amateur radio satellites are often referred to as OSCARs. These satellites can be used free of charge by licensed amateur radio operators for voice ( FM, SSB) and data (AX.25, packet radio, APRS) communications. Currently, over 18 fully operational amateur radio satellites are in orbit. They may be designed to act as repeaters, as linear transponders, and as store and forward digital relays. Amateur radio satellites have helpe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
High Frequency
High frequency (HF) is the ITU designation for the range of radio frequency electromagnetic waves (radio waves) between 3 and 30 megahertz (MHz). It is also known as the decameter band or decameter wave as its wavelengths range from one to ten decameters (ten to one hundred meters). Frequencies immediately below HF are denoted medium frequency (MF), while the next band of higher frequencies is known as the very high frequency (VHF) band. The HF band is a major part of the shortwave band of frequencies, so communication at these frequencies is often called shortwave radio. Because radio waves in this band can be reflected back to Earth by the ionosphere layer in the atmosphere – a method known as "skip" or " skywave" propagation – these frequencies are suitable for long-distance communication across intercontinental distances and for mountainous terrains which prevent line-of-sight communications. The band is used by international shortwave broadcasting stations ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amateur Radio
Amateur radio, also known as ham radio, is the use of the radio frequency spectrum for purposes of non-commercial exchange of messages, wireless experimentation, self-training, private recreation, radiosport, contesting, and emergency communications. The term "amateur" is used to specify "a duly authorised person interested in radioelectric practice with a purely personal aim and without pecuniary interest;" (either direct monetary or other similar reward) and to differentiate it from commercial broadcasting, public safety (such as police and fire), or professional two-way radio services (such as maritime, aviation, taxis, etc.). The amateur radio service (''amateur service'' and '' amateur-satellite service'') is established by the International Telecommunication Union (ITU) through the Radio Regulations. National governments regulate technical and operational characteristics of transmissions and issue individual station licenses with a unique identifying call sign, which mus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Allan Hills
The Allan Hills are a group of hills at the end of the Transantarctic Mountains System, located in Oates Land and Victoria Land regions of Antarctica. They are mainly ice free and about long, lying just north-west of the Coombs Hills near the heads of Mawson Glacier and Mackay Glacier. They were mapped by the New Zealand party (1957–58) of the Commonwealth Trans-Antarctic Expedition and named for Professor R. S. Allan of the University of Canterbury, New Zealand. Allan Hills is referred to as the ''Allan Nunatak'', and mapped north of Carapace Nunatak, in the memoirs of the Scott Base Leader Adrian Hayter. Both names are in the USGS listing. Meteorites According to William A. Cassidy, describing the 1976–1977 ANSMET meteorite collecting season, "Looking across the Mackay Glacier at the great sky-blue patches of ice beyond Mount Brooke, we were looking for the first time at ice that had a tremendous upstream collecting area. We were looking at Meteorite Heaven... Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Starlink
Starlink is a satellite internet constellation operated by SpaceX, providing satellite Internet access coverage to 45 countries. It also aims for global mobile phone service after 2023. SpaceX started launching Starlink satellites in 2019. As of December 2022, Starlink consists of over 3,300 mass-produced small satellites in low Earth orbit (LEO), which communicate with designated ground transceivers. In total, nearly 12,000 satellites are planned to be deployed, with a possible later extension to 42,000. SpaceX announced reaching more than one million subscribers in December 2022. The SpaceX satellite development facility in Redmond, Washington houses the Starlink research, development, manufacturing, and orbit control teams. The cost of the decade-long project to design, build, and deploy the constellation was estimated by SpaceX in May 2018 to be at least US$10 billion. SpaceX expects more than $30 billion in revenue by 2025 from its satellite constellation, while revenues ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HTTP
The Hypertext Transfer Protocol (HTTP) is an application layer protocol in the Internet protocol suite model for distributed, collaborative, hypermedia information systems. HTTP is the foundation of data communication for the World Wide Web, where hypertext documents include hyperlinks to other resources that the user can easily access, for example by a mouse click or by tapping the screen in a web browser. Development of HTTP was initiated by Tim Berners-Lee at CERN in 1989 and summarized in a simple document describing the behavior of a client and a server using the first HTTP protocol version that was named 0.9. That first version of HTTP protocol soon evolved into a more elaborated version that was the first draft toward a far future version 1.0. Development of early HTTP Requests for Comments (RFCs) started a few years later and it was a coordinated effort by the Internet Engineering Task Force (IETF) and the World Wide Web Consortium (W3C), with work later moving to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Email
Electronic mail (email or e-mail) is a method of exchanging messages ("mail") between people using electronic devices. Email was thus conceived as the electronic ( digital) version of, or counterpart to, mail, at a time when "mail" meant only physical mail (hence '' e- + mail''). Email later became a ubiquitous (very widely used) communication medium, to the point that in current use, an email address is often treated as a basic and necessary part of many processes in business, commerce, government, education, entertainment, and other spheres of daily life in most countries. ''Email'' is the medium, and each message sent therewith is also called an ''email.'' The term is a mass noun. Email operates across computer networks, primarily the Internet, and also local area networks. Today's email systems are based on a store-and-forward model. Email servers accept, forward, deliver, and store messages. Neither the users nor their computers are required to be online simult ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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