Electronics and Communication Engineering - Satellite Communication

Exercise :: Satellite Communication - Section 1

6. 

The discussing sharing of a communication satellite by many geographically dispersed Earth station, DAMA means

A. Demand-Assigned Multiple Access
B. Decibel Attenuated Microwave Access
C. Digital Analog Master Antenna
D. Dynamically-Assigned Multiple Access

Answer: Option A

Explanation:

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7. 

The angle subtended by earth at geostationary communication satellite is

A. 17.34°
B. 51.4°
C. 120°
D. 60°

Answer: Option A

Explanation:

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8. 

The INTELSAT-IV satellite launched in 1974 had two earth coverage antenna and two narrower-angle antennas subtending 4.5°. The signal from narrow-angle antenna was stronger than that from earth- coverage antenna by a factor of

A. 17.34/4.5
B. 17.34 x 4.5
C. (17.34/4.5)2
D. (17.34/4.5)4

Answer: Option C

Explanation:

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9. 

A transponder is a satellite equipment which

A. receives a signal from Earth station and amplifies
B. changes the frequency of the received signal
C. retransmits the received signal
D. does all of the above-mentioned functions

Answer: Option D

Explanation:

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10. 

A geosynchronous satellite

A. has the same period a that of the Earth
B. has a circular orbit
C. rotates in the equatorial plane
D. has all of the above

Answer: Option D

Explanation:

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