Satellites are launched into the space to do a specific job, There are satellites that are launched to monitor the cloud patterns for the weather station, There are satellites that launched to send television signals for Sky TV, and every satellite has to be designed specifically to fulfill its function. Satellites are used for many things such as communication, oceanography, astronomy, the surveillance, They help many scientists get a perceptive view of all kinds of objects anywhere in the world. Satellites send television signals directly to homes, They send the signals from a central station that generates programming to smaller stations that send the signals locally via the cables or the airwaves, The news broadcasts are sent from the field to the studio via the satellite. Satellites offer the flight phone communications on the airplanes, They are the main conduit of voice communication for the rural areas and the areas where the phone lines are damaged after a disaster, And they provide the primary timing source for the cell phones and the pagers. Communications satellites have the ability to rapidly communicate between a number of widely dispersed locations, They help the big manufacturing companies and the department stores to perform inventory management, They provide the instant credit card authorization and automated teller banking services to even small towns, They pay at the pump gas at the freeway gas stations, and video conferencing for the international corporations.
Communications satellite - Wikipedia
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 applications. The high frequency radio waves used for telecommunications links travel by line of sight and so are obstructed by the curve of the Earth. The purpose of communications satellites is to relay the signal around the curve of the Earth allowing communication between widely separated geographical points. To avoid signal interference, international organizations have regulations for which frequency ranges or "bands" certain organizations are allowed to use. This allocation of bands minimizes the risk of signal interference.
Satellite Communications : The Invention Of The Telephone
Communication Satellites Have you ever thought about how that little phone in your hand works? What about how you always seem to have internet and cable access? Satellites provide the signals to these and more devices.
In addition to these changes, new standard like life, liberty and pursuit of happiness sprouted which immensely changed the American lifestyle. The census of shows that Mass media and advertisement of the decade drastically improved America by providing a variety of new news and leisure sources. Comic books, advertising magazines, televisions, print cultures, posters were all forms of disclosing knowledge and remarkably transformed America culturally and socially in…. They are needed for cockpit traffic displays and reducing radar interference.