earth station

(redirected from Satellite earth station)
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earth station

[′ərth ‚stā·shən]
(communications)
A facility with a land-based antenna used to transmit and receive information to and from a communications satellite.

earth station

A ground-based receiving or transmitting/receiving station in a satellite communications system. The counterpart to the earth station is the satellite in orbit, which is the "space station." Earth stations use dish-shaped antennas, the diameters of which can be under two feet for satellite TV to as large as fifty feet for satellite operators. Antennas for space exploration have diameters reaching a hundred feet.

Multiplex, Modulate and Upconvert
An earth station is generally made up of a multiplexor, a modem, up and downconverters, a high power amplifier (HPA) and a low noise amplifier (LNA). Almost all transmission to satellites is digital, and the digital data streams are combined in a multiplexor and fed to a modem that modulates a carrier frequency in the 50 to 180 MHz range. An upconverter bumps the carrier into the gigahertz range, which goes to the HPA and dish.

Downconvert, Demodulate and Demultiplex
For receiving, the LNA boosts the signals to the downconverter, which lowers the frequency and sends it to the modem. The modem demodulates the carrier, and the digital output goes to the demultiplexing device and then to its destinations. See earth station on board vessel and base station.


Earth Station
Earth stations use dish-shaped antennas to transmit and receive microwave signals to and from satellites.







On Board a Ship
Earth stations on board vessels (ESVs) are used to receive TV, make phone calls and access the Internet while traveling near the coast or on the high seas. Encased in a waterproof container, the ESV must be able to track the satellite with great precision. If the ESV deviates by a half a degree, it must shut down transmission immediately in order to not interfere with other satellites. (Image courtesy of Sea Tel Inc., www.seatel.com)
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3 million, a large information technology and telecommunications center has asked Globecomm to provide a turnkey satellite earth station.
TEQ a leading provider of satellite network systems today announced that they have delivered the latest version of HighStreet Networks Xpress(TM) to a major European telecommunications provider for management and control their satellite earth station.
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7 million in follow-on options, from a global multilateral organization for fixed and transportable satellite earth station terminals.
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A significant inward investment in research and development has rewarded GigaSat with a comprehensive and highly innovative range of products including mobile and flyaway satellite earth station antennas from 0.
the world's foremost designer and manufacturer of computer software programs for satellite earth station monitor and control and network device management, has announced that the Company has reached an agreement to supply IDB Systems with software products and integration support.
Telecom will develop its Warkworth Satellite Earth Station, located near Auckland on New Zealand s North Island, to host Inmarsat and its GX satellite antenna.
NASDAQ: IDBX) announced today that IDB SYSTEMS, the unit of the company that provides expert engineering, design and integration of satellite earth station facilities, has reached an agreement with the Tianjin Posts and Telecommunications Administration to design and install Standard A and B Intelsat earth stations.
Once completed, the network will connect 300 remote stations around China to a central hub satellite earth station in Shanghai.
The combined companies own six satellite earth stations worldwide, covering North America, Central and South America, the Caribbean, Europe, Middle East and North Africa.
Dove has successfully accomplished more than one hundred communication network system integration projects, installed thousands satellite earth stations, and developed advanced satellite communication earth station monitors and control systems.

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