16 relations: Communications satellite, Fixed-satellite service, Frequency allocation, Ground segment, Hispasat, International Telecommunication Union, Military communications, NATO, Ofcom, Parabolic antenna, Rain fade, Satellite, SICRAL 1B, Space segment, Super high frequency, X band.
A communications satellite is an artificial satellite that relays and amplifies radio telecommunications signals via a transponder; it creates a communication channel between a source transmitter and a receiver at different locations on Earth.
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.
Frequency allocation (or spectrum allocation or spectrum management) is the allocation and regulation of the electromagnetic spectrum into radio frequency bands, which is normally done by governments in most countries.
A ground segment consists of all the ground-based elements of a spacecraft system used by operators and support personnel, as opposed to the space segment and user segment.
Hispasat is the operating company for a number of Spanish communications satellites that cover the Americas, Europe and North Africa from orbital positions 30° west and 61° west.
The International Telecommunication Union (ITU; Union Internationale des Télécommunications (UIT)), 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 between 29 North American and European countries.
The Office of Communications (Y Swyddfa Gyfathrebiadau), commonly known as Ofcom, is the UK 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.
SICRAL 1B is a military communications satellite built by Thales Alenia Space for Italian Armed Forces.
The space segment of an artificial satellite system is one of its three operational components (the others being the user and ground segments).
Super high frequency (SHF) is the ITU designation for radio frequencies (RF) in the range between 3 and 30 gigahertz (GHz).
The X band is the designation for a band of frequencies in the microwave radio region of the electromagnetic spectrum.