This document provides an overview of the history of satellite communication. It discusses early satellites like Sputnik 1, the first artificial satellite launched by the Soviet Union, and Telstar 1, the first to transmit transatlantic television signals. It also mentions Intelsat and the introduction of geosynchronous orbit. The document then discusses the basics of how satellite communication works and the advantages it provides like global coverage and high bandwidth. Some disadvantages like cost and signal delay are also noted. Contact information is provided at the end.

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4. Name Note
SPUTNIK I The first artificial satellite to be put
into Earth's orbit. It was launched into an
elliptical low Earth orbit by the Soviet
Union on October 4, 1957.
US forms advance Research Projects Agency
(ARPA) within the department of Defense
after USSR launches Sputnik, in order to
compete in science and Technology.
Sputnik I
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5. Telstar The AT&T Telstar I satellite was launched
on July 10th, 1962, and later that same
day transmitted the first live television
images from the United States to France.
Intelsat Geosynchronous earth orbit ,open to use
by all nations in 1964-1979
DirecTV Begins Direct Broadcast to Home in 1994
Iridium Was supposed to provide mobile
telephone service. by MOTOROLA
Intelsat
Telstar
Iridium
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6. Basics of satellite communication
Types of satellites
Structure & Working of satellite
Advantages & Disadvantages
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7. How satellites works?
The two stations can use a satellite as a relay
station for their communication
One Earth Station sends a transmission to the
satellite. This is called a Uplink.
The satellite Transponder
converts the signal and
satellite sends it down to the second
earth station. This is
Transmitting Earth called a Downlink.
station
uplink
Downlink
Receiving Earth station
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11. Based on the Satellite Altitude
GEO – Geostationary Orbits
• 36000 Km = 22300 Miles, equatorial
MEO – Medium Earth Orbits
• High bandwidth, High power
LEO – Low Earth Orbits
• Low power, More Satellites
VSAT
• Very Small Aperture Satellites
Private WANs
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13. Basics: Advantages of
Satellites
The advantages of satellite communication
Satellite to Satellite communication is
very precise.
Higher Bandwidths are available for use.
Predicting weather
High speed internet
Telephones
Detecting pollutants
Gathering information about large bodies
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14. Disadvantages of
Satellites
Cost to Provider
Cost to Consumer
Signal Delay
Unreliability
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16. adeel_tc@hotmail.com 0315-4632432
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