18 relations: Communications satellite, Fixed-satellite service, Frequency allocation, International Telecommunication Union, Military communications, NATO, Ofcom, Parabolic antenna, Rain fade, Satellite, Satellite space segment, SICRAL 1B, Skynet (satellite), Super high frequency, Syracuse (satellite), Wideband Global SATCOM, X band, XTAR.
A communications satellite is an artificial satellite that relays and amplifies through the use of a transponder, radio telecommunications signals, between a source and a receiver.
Fixed-satellite service (short: FSS) is – in line to ITU Radio Regulations – a radio-communication 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.
Use of radio frequency bands of the electromagnetic spectrum is regulated by governments in most countries, in a Spectrum management process known as frequency allocation or spectrum allocation.
The International Telecommunication Union (ITU; Union Internationale des Télécommunications), originally the International Telegraph Union (Union Télégraphique Internationale), is a specialized agency of the United Nations (UN) that is responsible for issues that concern information and communication technologies.
Military communications or military signals involve all aspects of communications, or conveyance of information, by armed forces.
The North Atlantic Treaty Organization (NATO; Organisation du traité de l'Atlantique Nord; OTAN), also called the North Atlantic Alliance, is an intergovernmental military alliance based on the North Atlantic Treaty which was signed on 4 April 1949.
The Office of Communications (Y Swyddfa Gyfathrebiadau), commonly known as Ofcom, is the government-approved regulatory and competition authority for the broadcasting, telecommunications and postal industries of the United Kingdom.
A parabolic antenna is an antenna that uses a parabolic reflector, a curved surface with the cross-sectional shape of a parabola, to direct the radio waves.
Rain fade refers primarily to the absorption of a microwave radio frequency (RF) signal by atmospheric rain, snow or ice, and losses which are especially prevalent at frequencies above 11 GHz.
In the context of spaceflight, a satellite is an artificial object which has been intentionally placed into orbit.
The space segment of an artificial satellite system is one of its three operational components (the others being the user and control segments).
SICRAL 1B is a communications satellite built by Thales Alenia Space.
Skynet is a family of military communications satellites, now operated by Astrium Services on behalf of the UK Ministry of Defence, which provide strategic communication services to the three branches of the British Armed Forces and to NATO forces engaged on coalition tasks.
Super high frequency (SHF) is the ITU designation for radio frequencies (RF) in the range between 3 GHz and 30 GHz.
Syracuse (Système de Radiocommunication utilisant un satellite, satellite based radiocommunication system) is a series of French military communications satellites.
The Wideband Global SATCOM system (WGS) is a high capacity satellite communications system planned for use in partnership by the United States Department of Defense (DoD) and the Australian Department of Defence.
The X band is a segment of the microwave radio region of the electromagnetic spectrum.
XTAR, LLC is a commercial satellite operator exclusively providing services in the X band frequency range, which is the communications cornerstone of today's military, diplomatic, humanitarian and emergency disaster response operations.