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A communications satellite is an artificial satellite that relays and amplifies radio telecommunication signals via a transponder; it creates a communication channel between a source transmitter and a receiver at different locations on Earth. Communications satellites are used for television, telephone, radio, internet, and military ...
The space segment of an artificial satellite system is one of its three operational components (the others being the user and ground segments). It comprises the satellite or satellite constellation and the uplink and downlink satellite links. [1] The overall design of the payload, satellite, ground segment, and end-to-end system is a complex ...
Download as PDF; Printable version; In other projects ... Earth station at the satellite communication facility Raisting Earth ... a basic telecommunication system ...
A beam waveguide antenna is a type of complicated Cassegrain antenna with a long radio wave path to allow the feed electronics to be located at ground level. It is used in very large steerable radio telescopes and satellite ground antennas, where the feed electronics are too complicated and bulky, or requires too much maintenance and alterations, to locate on the dish; for example those using ...
Satellite communications are affected by moisture and various forms of precipitation (such as rain or snow) in the signal path between end users or ground stations and the satellite being utilized. This interference with the signal is known as rain fade. The effects are less pronounced on the lower frequency 'L' and 'C' bands but can become ...
Communication may be fully in space (an inter-satellite laser link) or in a ground-to-satellite or satellite-to-ground application. The main advantage of using laser communications over radio waves is increased bandwidth , enabling the transfer of more data in less time.
For crewed spacecraft, mission control manages voice and video communications with the crew. Control centers may also be responsible for configuration management and data archival . [ 7 ] : 483 As with ground stations, there are often backup control facilities available to support continuity of operations.
Satellite-based communication systems, for example, require dual-band beam-steering capabilities to handle uplink and downlink data streams simultaneously. [ 7 ] [ 2 ] [ 3 ] The development of beam-steering antennas for Satellite Communication on the Move (SOTM) systems [ 7 ] highlights the need for antennas that are not only efficient but also ...