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Mobile Earth Station
Mobile earth station (also: ''mobile earth radio station'') is – according to ''Article 1.68'' of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR)ITU Radio Regulations, Section IV. Radio Stations and Systems – Article 1.68, definition: ''mobile earth station / mobile earth radio station'' – defined as «''An earth station in the mobile-satellite service intended to be used while in motion or during halts at unspecified points''.» Each ''station'' shall be classified by the ''service'' in which it operates permanently or temporarily. ;See also: Classification In accordance with ''ITU Radio Regulations'' (article 1) this type of ''radio station'' might be classified as follows: Earth station (article 1.63) *Mobile earth station *Land earth station (article 1.70) of the fixed-satellite service (article 1.21) or mobile-satellite service **Land mobile earth station (article 1.74) of the land mobile-satellite service (article 1.27) *Base earth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
One News Satellite Ute, Mt Allan Fire, NZ 2010
1 (one, unit, unity) is a number representing a single or the only entity. 1 is also a numerical digit and represents a single unit of counting or measurement. For example, a line segment of ''unit length'' is a line segment of length 1. In conventions of sign where zero is considered neither positive nor negative, 1 is the first and smallest positive integer. It is also sometimes considered the first of the infinite sequence of natural numbers, followed by 2, although by other definitions 1 is the second natural number, following 0. The fundamental mathematical property of 1 is to be a multiplicative identity, meaning that any number multiplied by 1 equals the same number. Most if not all properties of 1 can be deduced from this. In advanced mathematics, a multiplicative identity is often denoted 1, even if it is not a number. 1 is by convention not considered a prime number; this was not universally accepted until the mid-20th century. Additionally, 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Telecommunication Union
The International Telecommunication Union is a specialized agency of the United Nations responsible for many matters related to information and communication technologies. It was established on 17 May 1865 as the International Telegraph Union, making it the oldest UN agency. The ITU was initially aimed at helping connect telegraphic networks between countries, with its mandate consistently broadening with the advent of new communications technologies; it adopted its current name in 1932 to reflect its expanded responsibilities over radio and the telephone. On 15 November 1947, the ITU entered into an agreement with the newly created United Nations to become a specialized agency within the UN system, which formally entered into force on 1 January 1949. The ITU promotes the shared global use of the radio spectrum, facilitates international cooperation in assigning satellite orbits, assists in developing and coordinating worldwide technical standards, and works to improve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ITU Radio Regulations
The ITU Radio Regulations (short: RR) is a basic document of the International Telecommunication Union (ITU) that regulates on law of nations scale radiocommunication services and the utilisation of radio frequencies. It is the supplementation to the ITU Constitution and Convention and in line with the ITU International Telecommunication Regulations (ITR). The ITU RR comprise and regulate the part of the allocated electromagnetic spectrum (also: radio frequency spectrum) from 9 kHz to 275 GHz. Structure The current approved version of the ITU Radio Regulations (addition 2012) is structured as follows: Volume 1 – Articles * CHAPTER I – Terminology and technical characteristics **Section I – General terms (article 1.1-1.15) **Section II – Specific terms related to frequency management (article 1.16-1.18) **Section III – Radiocommunication services (article 1.19-1.60) **Section IV – Radio stations and systems (article 1.61-1.115) **Section V – Opera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Earth Station
A ground station, Earth station, or Earth terminal is a terrestrial radio station designed for extraplanetary telecommunication with spacecraft (constituting part of the ground segment of the spacecraft system), or reception of radio waves from astronomical radio sources. Ground stations may be located either on the surface of the Earth, or in its atmosphere. Earth stations communicate with spacecraft by transmitting and receiving radio waves in the super high frequency (SHF) or extremely high frequency (EHF) bands (e.g. microwaves). When a ground station successfully transmits radio waves to a spacecraft (or vice versa), it establishes a telecommunications link. A principal telecommunications device of the ground station is the parabolic antenna. Ground stations may have either a fixed or itinerant position. Article 1 § III of the International Telecommunication Union (ITU) Radio Regulations describes various types of stationary and mobile ground stations, and thei ... [...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 service ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Earth Station
A ground station, Earth station, or Earth terminal is a terrestrial radio station designed for extraplanetary telecommunication with spacecraft (constituting part of the ground segment of the spacecraft system), or reception of radio waves from astronomical radio sources. Ground stations may be located either on the surface of the Earth, or in its atmosphere. Earth stations communicate with spacecraft by transmitting and receiving radio waves in the super high frequency (SHF) or extremely high frequency (EHF) bands (e.g. microwaves). When a ground station successfully transmits radio waves to a spacecraft (or vice versa), it establishes a telecommunications link. A principal telecommunications device of the ground station is the parabolic antenna. Ground stations may have either a fixed or itinerant position. Article 1 § III of the International Telecommunication Union (ITU) Radio Regulations describes various types of stationary and mobile ground stations, and thei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Land Earth Station
A land earth station (also: land earth radio station) is – according to ''Article 1.70'' of the International Telecommunication Union´s (ITU) ITU Radio Regulations (RR)ITU Radio Regulations, Section IV. Radio Stations and Systems – Article 1.70, definition: ''land earth station / land earth radio station'' – defined as ''«An earth station in the fixed-satellite service or, in some cases, in the mobile-satellite service, located at a specified fixed point or within a specified area on land to provide a feeder link for the mobile-satellite service.''» Each ''station'' shall be classified by the ''service'' in which it operates permanently or temporarily. ;See also: Classification In accordance with ''ITU Radio Regulations'' (article 1) this type of ''radio station'' might be classified as follows: Earth station (article 1.63) * Mobile earth station (article 1.68) of the mobile-satellite service (article 1.25) *Land earth station ** Land mobile earth station (article 1.7 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fixed-satellite Service
Fixed-satellite service (short: FSS | also: fixed-satellite radiocommunication service) is – according to ''article 1.21'' of the International Telecommunication Union's (ITU) Radio Regulations (RR) – defined as ''A radiocommunication service between earth stations at given positions, when one or more satellites are used; the given position may be a specified fixed point or any fixed point within specified areas; in some cases this service includes satellite-to-satellite links, which may also be operated in the inter-satellite service; the fixed-satellite service may also include feeder links for other space radiocommunication services.'' Classification This ''radiocommunication service'' is classified in accordance with ''ITU Radio Regulations'' (article 1) as follows: Fixed service (article 1.20) * (article 1.21) *Inter-satellite service (article 1.22) *Earth exploration-satellite service (article 1.51) ** Meteorological-satellite service (article 1.52) ; Frequenc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Land Mobile Earth Station
Land mobile earth station (also: ''land mobile earth radio station'') is – according to ''Article 1.74'' of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR)ITU Radio Regulations, Section IV. Radio Stations and Systems – Article 1.74, definition: ''land mobile earth station / land mobile earth radio station'' – defined as «''A mobile earth station in the land mobile-satellite service capable of surface movement within the geographical limits of a country or continent''.» ;See also: Classification In accordance with ''ITU Radio Regulations'' (article 1) this type of ''radio station'' might be classified as follows: Earth station (article 1.63) * Mobile earth station (article 1.68) of the mobile-satellite service (article 1.25) * Land earth station (article 1.70) of the fixed-satellite service (article 1.21) or mobile-satellite service **Land mobile earth station * Base earth station (article 1.72) of the fixed-satellite service * Coast earth s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Land Mobile-satellite Service
Land mobile-satellite service (short: LMSS; also: Land mobile-satellite radiocommunication service') is – according to ''Article 1.27'' of the International Telecommunication Union's (ITU) Radio Regulations (RR) – defined as ''«A mobile-satellite service in which mobile earth stations are located on land.»'' ;See also: Classification Variations of this radiocommunication service in line to the ITU Radio Regulations article 1 are as follows : Mobile service (article 1.24) * Mobile-satellite service (article 1.25) **Land mobile-satellite service (article 1.27) Frequency allocation The allocation of radio frequencies is provided according to ''Article 5'' of the ITU Radio Regulations (edition 2012).''ITU Radio Regulations, CHAPTER II – Frequencies, ARTICLE 5 Frequency allocations, Section IV – Table of Frequency Allocations'' In order to improve harmonisation in spectrum utilisation, the majority of service-allocations stipulated in this document were incorporated ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Base Earth Station
Base earth station (also: ''base earth radio station'') is – according to ''article 1.72'' of the International Telecommunication Union´s (ITU) ITU Radio Regulations (RR)ITU Radio Regulations, Section IV. Radio Stations and Systems – Article 1.72, definition: ''base earth station / base earth radio station'' – defined as «''An earth station in the fixed-satellite service or, in some cases, in the land mobile-satellite service, located at a specified fixed point or within a specified area on land to provide a feeder link for the land mobile-satellite service''.» Each ''station'' shall be classified by the ''service'' in which it operates permanently or temporarily. ;See also: Classification In accordance with ''ITU Radio Regulations'' (article 1) this type of ''radio station'' might be classified as follows: Earth station (article 1.63) * Mobile earth station (article 1.68) of the mobile-satellite service (article 1.25) * Land earth station (article 1.70) of the fixed- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coast Earth Station
Coast earth station, also called the coast earth radio station is – according to ''article 1.76'' of the International Telecommunication Union´s (ITU) ITU Radio Regulations (RR)ITU Radio Regulations, Section IV. Radio Stations and Systems – Article 1.76, definition: '' coast earth station / coast earth radio station'' – defined as «''An earth station in the fixed-satellite service or, in some cases, in the maritime mobile-satellite service, located at a specified fixed point on land to provide a feeder link for the maritime mobile-satellite service''.» Each ''radio station'' shall be classified by the ''service'' in which it operates permanently or temporarily. Classification In accordance with ''ITU Radio Regulations'' (article 1) this type of ''radio station'' might be classified as follows: Earth station (article 1.63) * Mobile earth station (article 1.68) of the mobile-satellite service (article 1.25) * Land earth station (article 1.70) of the fixed-satellite servic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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