Electronics and Communication Engineering - Satellite Communication

Exercise :: Satellite Communication - Section 2

1. 

The noise temperature of sky is about __________ °K.

A. 100
B. 273
C. 0
D. 30

Answer: Option D

Explanation:

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2. 

Assuming earth to be a sphere of radius 6400 km and height of a geosynchronous satellite above Earth as 36000 km, the velocity of a geosynchronous satellite is __________ km/hr.

A. 28000
B. 15000
C. 36000
D. 11100

Answer: Option D

Explanation:

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3. 

In the context of error detection in satellite transmission, ARQ stands for

A. Automatic Repeat Request
B. Automatic Relay Request
C. Accelerated Recovery Request
D. Automatic Radiation Quenching

Answer: Option A

Explanation:

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4. 

To cover all inhabited regions of the Earth, the number of geosynchronous communication satellites required

A. 5
B. 3
C. 10
D. 2

Answer: Option B

Explanation:

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5. 

The different access methods which permit many satellite users to operate in parallel through a single transponder without interfering with each other as

A. Frequency Division Multiple Access (FDMA)
B. Time Division Multiple Access (TDMA)
C. Code Division Multiple Access (CDMA)
D. All of the above

Answer: Option D

Explanation:

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