Gallery
Directional (beam) aerials, of radio relay stations.
HF aerial on roof of the Chinese embassy, Berlin.
Fixed station (also. fixed radio station) is a station in the fixed service [ clarification needed ]. [1] Each station is classified by the service in which it operates permanently or temporarily.
Telecommunications in the Falkland Islands includes radio, television, fixed and mobile telephones, and the Internet.
Telecommunications in Lesotho include radio, television, print and online newspapers, fixed and mobile telephones, and the Internet.
Telecommunications in Togo include radio, television, fixed and mobile telephones, and the Internet.
An Earth observation satellite or Earth remote sensing satellite is a satellite used or designed for Earth observation (EO) from orbit, including spy satellites and similar ones intended for non-military uses such as environmental monitoring, meteorology, cartography and others. The most common type are Earth imaging satellites, that take satellite images, analogous to aerial photographs; some EO satellites may perform remote sensing without forming pictures, such as in GNSS radio occultation.
A Maritime Mobile Service Identity (MMSI) is effectively a maritime object's international maritime telephone number, a temporarily assigned UID, issued by that object's current flag state.
As defined by FS-1037C and ITU Radio Regulations, radiodetermination is:
the determination of the position, velocity or other characteristics of an object, or the obtaining of information relating to these parameters, by means of the propagation properties of radio waves
Fixed-satellite 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.
In telecommunications, a fixed service is a radiocommunication service between specified fixed points.
Inter-satellite service is – according to Article 1.22 of the International Telecommunication Union's (ITU) Radio Regulations (RR) – defined as A radiocommunication service providing links between artificial satellites.
A feeder link is – according to Article 1.115 of the International Telecommunication Union´s (ITU) ITU Radio Regulations (RR) – defined as:
A radio link from an earth station at a given location to a space station, or vice versa, conveying information for a space radiocommunication service other than for the fixed-satellite service. The given location may be at a specified fixed point, or at any fixed point within specified areas.
Land station is – according to Article 1.69 of the International Telecommunication Union´s (ITU) ITU Radio Regulations (RR) – defined as "A radio station in the mobile service not intended to be used while in motion."
Maritime mobile-satellite service is – according to Article 1.29 of the International Telecommunication Union's Radio Regulations (RR) – "A mobile-satellite service in which mobile earth stations are located on board ships; survival craft stations and emergency position-indicating radiobeacon stations may also participate in this service", in addition to serving as navigation systems.
Mobile earth station is – according to Article 1.68 of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR) – defined as "An earth station in the mobile-satellite service intended to be used while in motion or during halts at unspecified points."
A land earth station is – according to Article 1.70 of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR) – 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."
Ship earth station is – according to Article 1.78 of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR) – defined as "A mobile earth station in the maritime mobile-satellite service located on board ship."
Land mobile earth station is – according to Article 1.74 of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR) – 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."
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) – 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.
Base earth station is – according to article 1.72 of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR) – 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."
Aeronautical earth station is – according to Article 1.82 of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR) – defined as "An earth station in the fixed-satellite service, or, in some cases, in the aeronautical mobile-satellite service, located at a specified fixed point on land to provide a feeder link for the aeronautical mobile-satellite service."
Aircraft earth station is – according to Article 1.84 of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR) – defined as "A mobile earth station in the aeronautical mobile-satellite service located on board an aircraft."
