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1. Dr. AHMED, Wasiu Akande (Instructor)
EARTH STATION TECHNOLOGY
(SCM 704)
ARCSSTE-E’s PGD Program 2021/2022

2. Outline
An Overview of Satellite Earth Station Technology Subsystems;
Earth Station Design and Fabrication considerations;
Earth Station Standards;
Reliability of Earth Stations;
Operations and Maintenance of Earth Stations;
Rocket Launch Technology and Parking Orbits.

3. An Overview of Satellite Earth Station
 An earth station is a collection of equipment installed on the earth’s
surface that enables communications over one or more satellites
possible;
Earth stations consist of a reflector antenna (or parabolic dish), a feed
system (to send and receive the RF carrier), data handling equipment
and mechanical tracking equipment (to keep the satellite within the
antenna’s data send/receive area).
Three essential elements of any satellite communication network or
system include the Earth segment, the space segment and the
up/down link between the space segment and the Earth segment.

4. An Overview of Satellite Earth Station
Figure 1: Satellite Up and Down Links

5. An Overview of Satellite Earth Station
Satellite Up Link
1. Digital data is sent to the modulator, which converts it to modulated signal then
refer to as Intermediate Frequency (IF). The modulators use DVB to organize
communication over microwave link,
2. The Intermediate Frequency is piped to an up converter via coaxial cable and
mixes it with a higher frequency to produce a final frequency that carries the
modulated data,
3. Signal is denoised through a band pass filter or other means and then amplified,
4. The final cleaned signal is transmitted down the wave-guide to the dish,
5. The feed horn at the focal point of the dish emits the high frequency radio
transmission, which the dish focuses into a directional transmission at the
satellite.

6. An Overview of Satellite Earth Station
Satellite Down Link
1. The satellite transmits a signal containing data,
2. The signal is then received at satellite dish,
3. The signal is amplified and then fed into down converter,
4. The down converter down mixes the signal to create intermediate
frequency,
5. The IF is then fed into the demodulator and converted into a data signal,
6. The data stream is forwarded into the network via router.

7. An Overview of Satellite Earth Station
 An Earth station located on the Earth’s surface could either be fixed
or mobile;
The Earth station is intended for communication with one or more
manned or unmanned space stations via reflecting satellite;
Types Earth Station Satellites.

8. An Overview of Satellite Earth Station
Figure 2. Earth Station Communicating with Satellites

9. An Overview of Satellite Earth Station
Figure 3. Earth station communicating with another Earth station

10. An Overview of Satellite Earth Station
 Three essential elements of any satellite communication network or
system include
1. the Earth segment,
2. the space segment,
3. the up/down link between the space segment and the Earth
segment.

11. An Overview of Satellite Earth Station

12. An Overview of Satellite Earth Station

13. An Overview of Satellite Earth Station
GPS User Segments (Up/Down link)

14. THANKS FOR YOUR ATTENTION