Satellite Communication
Friday, February 27th, 2009From Bird watching to Satellite communication man has traveled a lot from being controlled to a controlling factor. Similarly in satellite communications from AT&T first launched in 1962 to present day innumerable developments have occurred.
This satellite equipment has two basic components namely satellite and ground station. Among these, satellites are known as space segment, which can be further fragmented into 3 parts as transponder, fuel systems and telemetry control. First the transponder of the satellite equipment, through its antenna picks and sends the signal while telemetry system reflects electronic signals.
More Satellite Internet
Tuesday, February 24th, 2009Satellite Internet is commonly is places where the terrestrial Internet is not available and also in locations that are constantly mobile, like a ship. Satellite Internet access has worldwide availability, even in ships and moving land based vehicles.
Satellite Internet
Sunday, February 22nd, 2009Satellite Internet systems are also one way receive systems that have the common dial-up internet access. The data that is outbound travels through a modem that connects to the internet by a telephone line but the satellite-sent downloads travel at speeds of broadband Internet. In the United States, the uplink stations are required to take obtain FCC license while the end users need not take any license.
Satellite Phone
Friday, February 20th, 2009A satellite phone or sat phone as is commonly called is a phone that offers connection to satellites that are orbiting the earth instead of connecting to the terrestrial sites. It could cover the entire earth or it could cover only specific regions of the earth. Previously, the satellite phones looked like the mobile phones prevalent during the 1980s and 1990s, the online difference being a large antenna that was retractable. But recent satellite phone look more like the modern day mobile phones. Satellite phones are popularly used in places where the terrestrial cellular phones do not have any coverage.
Satellite Television
Tuesday, February 17th, 2009Satellite television today is received by most people in developed markets by means of a DBS provider like a DTH platform or Dish TV. The service providers choose programs as is required and send across the same to its customers a predetermined package. The basic aim of the service provider is to give competition to the cable TV by providing hundreds of channels to its customers. The broadcast of the service provider these days, unlike the previous days is completely digital hereby providing extremely high quality video and sound. C-band radio was used in earlier broadcasts that were in the range of 3.4 to 7 GHz frequency. But digital satellite television uses the Ku band frequency of 10 to 14 GHZ. Digital satellite television has five major components. The programming sources are nothing but the channels that are broadcast. The DTH platform does not create its own content rather it broadcasts content of other companies like ESPN or HBO by paying them accordingly. Thus the satellite television service provider acts like a broker between the end viewer and the content provider. This is very similar to the job of a cable television provider. Acting as the hub of the system is the broadcast centre. It receives content from different programming sources and compresses the same and if needed even scrambles it and beams across the signal to the satellites it uses. The satellite in turn receives these signals and rebroadcasts them back to the earth. The dish at the viewer’s house picks up these signals from the sky (one or more satellites in the same part) and sends them to the receiver placed at the viewer’s house. The signals are then processed by the receiver and then sent to the standard television set for viewing.
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