I am rana kashif hussain email:kashifhussinrajput.telecom@gmail.com cell:0331-8885966

1. TOPIC
Satellite communication
Roll no:F16-16TL21 rana Kashif hussain Submitted to: sir Rizwan Ali Shah
Email:kashifhussainrajput.telecom@gmail.com

2. INTRODUCTION
• Satellite.
• Satellite is an artificial body placed in orbit around the earth to collect
information for communication.
• The first artificial satellite was Sputnik 1, launched by the Soviet Union on 4
October 1957.
• Currently there are approximately 1,886 artificial satellites orbiting the Earth.

3. • For example:
• The moon is a satellite because it moves
around the earth.

4. SATELLITE ORBITS
• An orbit is a regular repeating
path.
• An object is on orbit is called a
satellite.

5. TYPES OF ORBITS
There are three different types of orbit
Low earth orbit (LEO)
Medium earth orbit (MEO)
Geostationary orbit (GEO)

6. LOW EARTH ORBIT(LEO)
LEO satellites are much loser to the earth than GEO satellites.
Distance :500 – 1500km
Rotation period : 95 – 120 minutes
International space station also exists in
this orbits.
There are about 800 active satellites in
Low Earth Orbit.

7. APPLICATIONS OF (LEO) SATELLITES
scientific satellites & weather satellite
.weather satellite .spy satellites

8. MEDIUM EARTH ORBIT (MEO)
MEO satellites have a larger coverage area than Leo satellites
Distance :500 – 1500km
Rotation period: 6 hours
The satellites of this orbit are use for
land and sea navigation
For example :satellites of google map.

9. APPLICATIONS OF (MEO) SATELLITES
• global wireless communication
coverage. Because MEO satellites
are closer to the
earth than geostationary satellites

10. GEOSTATIONARY EARTH ORBIT (GEO)
 Satellites in the geostationary orbit revolve around the earth at
the same speed as the earth rotates.
 Because of long the distance from earth it gives a large coverage
area , almost a fourth of the earth ‘s surface
Distance :36000km
Rotation period: 24 hours

11. APPLICATIONS OF (GEO)SATELLITES
• Communication satellites.
• E.g. Dish antennas of TV
• Military purposes. Activities of other
countries can be scanned using these
satellites
• GPS. Global Positioning System

12. HOW DOES A
SATELLITE WORK
• A earth station sends message in GHz
range( uplink )
• Satellite receive and retransmit signal back
(downlink)
• Other station receive message in useful
strength area

13. APPLICATIONS
Telephone Television Digital cinema
Radio Internet access Military