Code: A-22
Time: 3 Hours
Subject: SATELLITE & SPACE COMMUNICATION
Max. Marks: 100

NOTE: There are 11 Questions in all.

  • Question 1 is compulsory and carries 16 marks. Answer to Q. 1. must be written in the space provided for it in the answer book supplied and nowhere else.
  • Answer any THREE Questions each from Part I and Part II. Each of these questions carries 14 marks.
  • Any required data not explicitly given, may be suitably assumed and stated.
Q.1       Choose the correct or best alternative in the following: (2x8)

a. A geostationary satellite is
 

(A) Motionless in space (except for its spin).
(B) Not really stationary at all but orbits the earth with a 24 hour period.
(C) Appears stationary over the earth's magnetic pole.
(D) Located at a height of 35800 Km to ensure global coverage.
b. Satellites used for weather forecasting are usually placed in
 

(A) Circular orbit.
(C) Polar orbit.

(B) Geosynchronous orbit.
(D) Geostationary orbit.

c.

The EIRP of a satellite down link operating with a transmit power of 6 watts at 12 GHz and an antenna gain of 48.2 dB is

 

(A 56 dBW.
(C) 70 dBW.

(B) 30 dBW.
(D) 53 dBW.
d. Satellites used for intercontinental communications are known as
 

(A) COMSAT.
(C) DOMSAT.

(B) MARISAT.
(D) INTELSAT.
e. The quantity which serves as a measure of the performance of a satellite link is
 

(A) System noise temperature.
(C) EIRP.

(B) ratio.
(D) ) ratio at receiver input.

f. When an antenna of 35 K noise temperature is matched into a satellite receiver of noise temperature 100 K, the noise power for a bandwidth of 36 MHz is
  (A) 0.056 pw.
(C) 1.2 w.
(B) 0.09 pw.
(D) ) 0.067 pw.

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