satellite communication system

1. SATELLITE
COMMUNICATON SYSTEM
1
BY :- MD YASIR BASHIR

2.  Introduction
 History
 Classical satellites
 Principle of communication
Frequency band
 Elements of satellite communication system
 Applications
 Disadvantages
 Contemporary area covered
 Conclusion
 References
OVERVIEW
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3. What are the Satellites:
 Satellite:- an artificial body placed in orbit round the earth or
another planet in order to collect information or for
communication.
 Communication satellite :- a communication satellite is basically
electronic communication package placed in orbit round the earth
in order to relay television, radio, and telephone signals.
3source :www.giphy.com

4. History
 The Space Age began in 1957 with the U.S.S.R.’s launch of the first artificial
satellite, called Sputnik, which transmitted telemetry information for 21
days.
 This achievement was followed in 1958 by the American artificial satellite
Score.
 Two satellites were deployed in 1960: a reflector satellite, called
Echo, and Courier. The Courier was particularly significant because it
recorded a message that could be played back later.
 In 1962 active communication satellites (repeaters), called Telstar and
Relay, were deployed, and the first geostationary satellite, called Syncom,
was launched in 1963
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5. Some Classical Satellites
Sputnik
Telstar Syncom
Echo Courier
Relay
5source: www.nasa.gov and google images

6. In satellite communication, signal transferring between the sender
and receiver is done with the help of satellite.
In this process, the signal which is basically a beam of modulated
microwaves is sent towards the satellite. Then the satellite amplifies
the signal and sent it back to the receiver’s antenna present on the
earth’s surface.
Principle of communication
6source:www.giphy.com and www.thebigger.com

7. Contd…
7source : www.intelsatgeneral.com

8. Contd...
8Source:http://www.eceway.com/2015/06/do-you-know-how-satellites-work.html

9. Frequency Bands
 Different kinds of satellites use different frequency bands.
 L–Band: 1 to 2 GHz, used by MSS(mobile service satellite)
 S-Band: 2 to 4 GHz, used by MSS, NASA, deep space research
 C-Band: 4 to 8 GHz, used by FSS(fixed service satellite)
 X-Band: 8 to 12.5 GHz, used by FSS and in terrestrial imaging, ex:
military and meteorological satellites
 Ku-Band: 12.5 to 18 GHz: used by FSS and BSS (DBS)
 K-Band: 18 to 26.5 GHz: used by FSS and BSS
 Ka-Band: 26.5 to 40 GHz: used by FSS
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10. Elements of satellite
communications system
Two major elements of Satellite Communications Systems are:
 Space Segment :- Satellite itself is known as space segment and
comprised of complex structure. It has some major subsystem like
TTC system, Transponder, Fuel Tank called thrusters tank ,
Antenna and Control system etc.
 Ground segment:- It is a network of earth stations and user
terminals that provides applications and services to end users.
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11. Space segment
 Antennas and transceivers send and
receive signals to and from the Earth or
another satellite.
 Rocket motors move the satellite in
space(powered by electric or chemical
fuel mostly hydrazine is use).
 Fuel tanks store the fuel for the
rocket.
 Solar panels use solar cells to turn the
sun's energy into electricity.
 Batteries store the electricity
generated by the solar panels.
 On-board processors provide the
“brain” of the satellite and tell the
satellite to do what humans want it to
do.
11

12. 12source: www.demeter.cnes.fr

13. Application
of
communication satellites
13

14. IoT
 Satellite technology has a pivotal role in driving the growth
momentum behind the Internet of Things (IoT) and unlocking
the promise of interconnected devices.
14source: google images

15. Environmental Monitoring
 Environmental monitoring satellites carry highly sensitive
imagers and sounders to monitor the Earth's environment like
 movement and formation of clouds.
 ocean temperatures.
 glacial movement
 Large-scale computers use this data to model the entire earth's
atmosphere and create weather forecasts.
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16. Disaster management
 Satellites are used in disasters for communications, remote
sensing and mapping.
 In disasters that destroy local infrastructure, satellite
communications are the only option for getting information
out quickly.
16Source:www.giphy.com

17.  A single satellite can provide several hundreds of TV channels to
an entire country or continent.
Television and radio broadcast
17
Source:www.teachengineering.org

18. Satellite broadband
Satellite broadband is very similar to dish TV it receives information to a small
dish and transfers the information via a cable connected to a modem in our
house. In addition, satellite broadband also sends out information to the
satellite so we have a fast two-way broadband connection.
18source: http://avonlinebroadband.com/about-satellite-broadband/how-satellite-broadband-works/

19. Military
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 Military communications require secure links with highly flexible
coverage. which is provided by communication satellites .
Efficient, rapid and above all secure communications are
of paramount importance in today’s military operations.
source: airbus defence and space

20. Is there any disadvantages ???
 Large up front capital costs (space segment and launch).it is
estimated that a single satellite launch can range in cost from a
low of about $15 million to a high of about $400 million.
 Propagation delay (nearly 540ms in case of geostationary)
 Attenuation loss.
 Repair of satellite is almost impossible, once it has been
launched.
20
YES

21. Contemporary area covered
 History of science and technology
 Environmental (weather telecast)
 societal (internet , radio broadcast)
 Safety (disaster management)
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22. Conclusion
 Artificial earth satellites have been used for more than 40 years
and satellite communications form a unique part of daily
routine life from internet to telephony.
 It serving billions of people and granting access to a vast range
of voice, data and video telecommunication applications.
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23. References
1. DipakMisra, Dinesh Kumar Misra, Dr. S.P.Tripathi “Satellite Communication
Advancement, Issues,Challenges and Applications” IJARCSSE Vol. 2, Issue 4, April
2013 page 1681-1682
2. Mach, I. (n.d.). CHERNOMOR satellite communication system. 3rd International
Conference on Satellite Communications (IEEE Cat. No.98TH8392), 1,page 146-
147. sept 22-24 1998
3. Author: Michael O. Kolawole Title: Satellite Communication Engineering
ISBN: 082470777X EAN: 9780071371766 publisher: Marcel Dekker, Inc.
retrieved 2016-04-12 from:https://studypoint4u.wordpress.com/2015/02/26/satellite-
communication-engineering-by-michael-o-kolawole/
4. "Extra-Terrestrial Relays — Can Rocket Stations Give Worldwide Radio Coverage?
(PDF). Arthur C. Clark. October 1945. Retrieved 2016-04-15
5. “IoT”- Retrieved 2016-04-19 from:- http://www.thuraya.com/content/can-internet-
things-iot-survive-without-satellite
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