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Question: What are advantages of satellite communication over terrestrial communication?
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This question appears in Mumbai University > Satellite Communication and Network subject

Marks: 5 M

Year: May 2014, May 2012

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modified 6 weeks ago by gravatar for Letsnameyourbaby Letsnameyourbaby0 written 13 months ago by gravatar for Sayali Sayali860
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The advantages of satellite communication over terrestrial communication are as follow:-

  1. Satellite are mainly wide area broadcast media as transmitter antenna may be designed to provide signals to service areas as small as a city or as large as a country.
  2. Terrestrial communication is point-to-point whereas Satellites communication is point to multipoint approach.
  3. Relatively fast installation. Once satellite is in position, earth station can be installed and communication can be established in days or hours. But terrestrial circuits require time consuming installations.
  4. The satellite costs are independent of distance whereas the terrestrial network costs are proportional to distance.
  5. The satellite itself is a single repeater. For terrestrial links antennas are located at a specific height to overcome obstacles and also repeaters are to be used in between the links to compensate for path losses.
  6. Satellite systems can provide coverage to remote places where terrestrial system fails. For communication between remote areas (hilly terrains, island etc) and the main land satellite communication is the only cost effective option
  7. Mobile communication is easy to achieve using satellite communication because of its broader coverage area and its flexibility in connecting mobile vehicles.
  8. Satellites have average low operating cost. Manufacturing of satellite is expensive but after that it would operate typically for years.
  9. As compared to optical fiber cable where the signal quality changes with the distance travelled by signal through the cable, satellite communication has an advantage that signal quality is independent of distance as long as the two stations fall within the same geographic coverage areas.
  10. Wide area of application such as whether forecasting ,search ,navigation, military.
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written 13 months ago by gravatar for Sayali Sayali860
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The function of the various sub systems A communication satellite essentially consists of two main functional units, namely

  • Payload Bus

The primary function of the payload is to provide communication. It includes

  • The transponders and associated communication antennas

The bus provides all the necessary electrical and mechanical support to operate the payload. It is made up of the following units.

  • Attitude and orbit control system (AOCS) The propulsion system The thermal control system Telemetry, Tracking and command (TT&C) System Power system Structure
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written 6 weeks ago by gravatar for Letsnameyourbaby Letsnameyourbaby0
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