enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Communications satellite - Wikipedia

    en.wikipedia.org/wiki/Communications_satellite

    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 ...

  3. Satellite Internet access - Wikipedia

    en.wikipedia.org/wiki/Satellite_Internet_access

    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 ...

  4. Transponder (satellite communications) - Wikipedia

    en.wikipedia.org/wiki/Transponder_(satellite...

    A communications satellite's transponder is the series of interconnected units that form a communications channel between the receiving and the transmitting antennas. [1] It is mainly used in satellite communication to transfer the received signals. A transponder is typically composed of: an input band-limiting device (an input band-pass filter),

  5. Satellite phone - Wikipedia

    en.wikipedia.org/wiki/Satellite_phone

    A satellite telephone, satellite phone or satphone is a type of mobile phone that connects to other phones or the telephone network by radio link through satellites orbiting the Earth instead of terrestrial cell sites, as cellphones do. Therefore, they can work in most geographic locations on the Earth's surface, as long as open sky and the ...

  6. Satellite - Wikipedia

    en.wikipedia.org/wiki/Satellite

    Similar satellites can work together as groups, forming constellations. Because of the high launch cost to space, most satellites are designed to be as lightweight and robust as possible. Most communication satellites are radio relay stations in orbit and carry dozens of transponders, each with a bandwidth of tens of megahertz.

  7. Satellite modem - Wikipedia

    en.wikipedia.org/wiki/Satellite_modem

    A satellite modem or satmodem is a modem used to establish data transfers using a communications satellite as a relay.A satellite modem's main function is to transform an input bitstream to a radio signal and vice versa.

  8. Satellite television - Wikipedia

    en.wikipedia.org/wiki/Satellite_television

    A number of satellite dishes. Satellite television is a service that delivers television programming to viewers by relaying it from a communications satellite orbiting the Earth directly to the viewer's location. [1] The signals are received via an outdoor parabolic antenna commonly referred to as a satellite dish and a low-noise block ...

  9. Satellite radio - Wikipedia

    en.wikipedia.org/wiki/Satellite_radio

    Satellite radio is defined by the International Telecommunication Union (ITU)'s ITU Radio Regulations (RR) as a broadcasting-satellite service. [1] The satellite's signals are broadcast nationwide, across a much wider geographical area than terrestrial radio stations, and the service is primarily intended for the occupants of motor vehicles .