|
Aeronautical Mobile-satellite Service
Aeronautical mobile-satellite service (short: AMSS; | also: ''aeronautical mobile-satellite radiocommunication service'') is – according to ''Article 1.35'' of the International Telecommunication Union's (ITU) Radio Regulations (RR) – defined as ''«A mobile-satellite service in which mobile earth stations are located on board aircraft; survival craft stations and emergency position-indicating radiobeacon stations may also participate in this service. ''. » ;See also: Classification This ''radiocommunication service'' is classified in accordance with ''ITU Radio Regulations'' (article 1) as follows: Mobile service (article 1.24) * Aeronautical mobile service (article 1.32) **Aeronautical mobile-satellite service *** Aeronautical mobile-satellite (R)° service (article 1.36) *** Aeronautical mobile-satellite (OR)°° service (article 1.37) (R)° = abbreviation to route flights (route)(OR)°° = abbreviation to flights others than on routes (off-route) Freque ... [...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 – Operatio ... [...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] |
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 s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Survival Craft Station
Survival craft station (also: survival craft radio station) is – according to ''Article 1.65'' of the International Telecommunication Union´s (ITU) radio regulationsITU Radio Regulations, Section IV. Radio Stations and Systems – Article 1.65, definition: ''survival craft station'' / ''survival craft radio station'' – defined as ''A mobile station in the maritime mobile service or the aeronautical mobile service Aeronautical mobile service (short: AMS; also: aeronautical mobile radiocommunication service') is – according to ''Article 1.32'' of the International Telecommunication Union's (ITU) Radio Regulations (RR) – defined as "A mobile service ... intended solely for survival purposes and located on any lifeboat, life-craft or other survival equipment''. Each ''station'' shall be classified by the ''service'' in which it operates permanently or temporarily. See also * * References / sources International Telecommunication Union (ITU) {{Radio station IT ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Emergency Position-indicating Radiobeacon Station
An Emergency Position-Indicating Radio Beacon (EPIRB) is a type of emergency locator beacon for commercial and recreational boats, a portable, battery-powered radio transmitter used in emergencies to locate boaters in distress and in need of immediate rescue. In the event of an emergency, such as a ship sinking or medical emergency onboard, the transmitter is activated and begins transmitting a continuous 406 MHz distress radio signal, which is used by search-and-rescue teams to quickly locate the emergency and render aid. The signal is detected by satellites operated by an international consortium of rescue services, COSPAS-SARSAT, which can detect emergency beacons anywhere on Earth transmitting on the distress frequency of 406 MHz. The satellites calculate the position or utilize the GPS coordinates of the beacon and quickly passes the information to the appropriate local first responder organization, which performs the search and rescue. As Search and Rescue approach the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mobile Service
Mobile service is – in line to ITU Radio Regulations – a radiocommunication service between mobile and land stations, or between mobile stations (CV). Classification In accordance with ''ITU Radio Regulations'' (article 1) variations of this ''radiocommunication service'' are classified as follows: ;Mobile service: *Mobile-satellite service (article 1.25) * Land mobile service (article 1.26) **Land mobile-satellite service (article 1.27) * Maritime mobile service (article 1.28) **Maritime mobile-satellite service (article 1.29) **Port operations service (article 1.30) **Ship movement service (article 1.31) * Aeronautical mobile service (article 1.32) ** Aeronautical mobile (R)° service (article 1.33) ** Aeronautical mobile (OR)°° service (article 1.33) **Aeronautical mobile-satellite service (article 1.35) *** Aeronautical mobile-satellite (R)° service (article 1.36) *** Aeronautical mobile-satellite (OR)°° service (article 1.37) (R)° = abbreviation to route flights (ro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aeronautical Mobile Service
Aeronautical mobile service (short: AMS; also: aeronautical mobile radiocommunication service') is – according to ''Article 1.32'' of the International Telecommunication Union's (ITU) Radio Regulations (RR) – defined as "A mobile service between aeronautical stations and aircraft stations, or between aircraft stations, in which survival craft stations may participate; emergency position-indicating radiobeacon stations may also participate in this service on designated distress and emergency frequencies." Classification Variations of this radiocommunication service in line to the ITU Radio Regulations article 1 are as follows : Mobile service (article 1.24) *Aeronautical mobile service (article 1.32) ** Aeronautical mobile (R)° service (article 1.33) ** Aeronautical mobile (OR)°° service (article 1.34) **Aeronautical mobile-satellite service (article 1.35) *** Aeronautical mobile-satellite (R)° service (article 1.36) *** Aeronautical mobile-satellite (OR)°° service ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aeronautical Mobile-satellite (R) Service
Aeronautical mobile-satellite (R)° service (short: AMS(R)S; | also: ''aeronautical mobile-satellite (R) radiocommunication service'') is – according to ''Article 1.36'' of the International Telecommunication Union's (ITU) Radio Regulations (RR) – defined as «''An aeronautical mobile-satellite service reserved for communications relating to safety and regularity of flights, primarily along national or international civil air routes''.» ;See also: Classification This ''radiocommunication service'' is classified in accordance with ''ITU Radio Regulations'' (article 1) as follows: Mobile service (article 1.24) * Aeronautical mobile service (article 1.32) ** Aeronautical mobile-satellite service (article 1.35) ***Aeronautical mobile-satellite (R)° service *** Aeronautical mobile-satellite (OR)°° service (article 1.37) (R)° – abbreviation to route flights (route) (OR)°° – abbreviation to flights others than on routes (off-route) Frequency allocation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aeronautical Mobile-satellite (OR) Service
Aeronautical mobile-satellite (OR)°° service (short: AMS(R)S; | also: ''aeronautical mobile-satellite (R) radiocommunication service'') is – according to ''Article 1.37'' of the International Telecommunication Union's (ITU) Radio Regulations (RR) – defined as «''An aeronautical mobile-satellite service reserved for communications relating to safety and regularity of flights, primarily outside national or international civil air route The atmosphere of Earth is the layer of gases, known collectively as air, retained by Earth's gravity that surrounds the planet and forms its planetary atmosphere. The atmosphere of Earth protects life on Earth by creating pressure allowing for ...s''.» ;See also: Classification This ''radiocommunication service'' is classified in accordance with ''ITU Radio Regulations'' (article 1) as follows: Mobile service (article 1.24) * Aeronautical mobile service (article 1.32) ** Aeronautical mobile-satellite service (article 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frequency Allocation
Frequency allocation (or spectrum allocation or spectrum management) is the allocation and regulation of the electromagnetic spectrum into radio frequency bands, normally done by governments in most countries. Because radio propagation does not stop at national boundaries, governments have sought to harmonise the allocation of RF bands and their standardization. ITU definition The International Telecommunication Union defines frequency allocation as being of "a given frequency band for the purpose of its use by one or more terrestrial or space radiocommunication services or the radio astronomy service under specified conditions".ITU Radio Regulations, Section IV. Radio Stations and Systems – Article 1.16, definition: allocation (of a frequency band). ''Frequency allocation'' is also a special term, used in national frequency administration. Other terms are: Bodies Several bodies set standards for frequency allocation, including: * International Telecommunication U ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
