Master of Science II (Electronics) Examination:
Oct Nov 2016 Semester III (Old CGPA)
SLR No. Day
Date Time Subject Name Paper
No. Seat No.
SLR SJ
351
Monday
21/11/2016
02:30 PM
to
05:00 PM
Satellite Communication
C
XI
Instructions: Q.No.1 and 2 are compulsory.
Answer any three questions from Q.No.3 to Q.No.7.
All questions carry equal marks.
Total Marks: 70
Q.1 Select correct alternatives: 08
Kepler's third law states?
Apogee means
The point smallest from earth The point nearest from earth
The point Farthest from earth None of the above
Which of the following are Satellite Link parameters?
Choice of operating frequency Propagation Consideration
Both a and b None of the above
What is application of satellite systems?
Whether forecasting Terrestrial communication
Point to point communication None of the above
Mention the service of satellite systems.
Broadcasting satellites services Signal transmission
Information transmission None of the above
Which of the following factor is taken into account for satellite link
design?
Absorption of signal
Various noise sources present
Gain of transmitter and receiving antenna at both ends
All of the above
For global communication. The minimum number of satellites needed is
1 3
7 11
The frequency band used by most satellite is
UHF VHF
SHF EHF
Page 1 of 2
State True or false: 06
Inclination and Azimuth angles determine where to point an earth station
so that it intercepts the satellite.
AOCS subsystem is controlled by earth station.
VSAT stands for very Demand Access Multiple Assigned.
DAMA stands for Demand Access Multiple Assigned
Absorption of signal is one of the factor taken into account for satellite
link design.
MEO is placed in the range 400 to 1000 in above the earth.
Q.2 Write a short note:
Reference burst 05
Satellite Radio Broadcasting 05
LEO and MEO 04
Q.3 Derive the expression for up-link and down link design. 08
Define noise figure and noise temperature. 06
Q.4 Satellite is in an elliptical orbit with a perigee of 1000 Km and an apogee of
4000 Km. Using a mean earth radius of 6378.14 Km. Find the period of the
orbit in hours. Minutes and seconds also find eccentricity of the orbit.
08
Briefly describe the three axis method of satellite stabilization. 06
Q.5 With a block diagram describe the working of Telemetry. Tracking and
Antenna of satellite subsystem.
08
Explain single and double conversion. 06
Q.6 Explain 08
Elliptical orbit
ii) Molhiya orbit
iii) Radiation orbit
Compare between TDMA, FDMA and CDMA system. 06
Q.7 Explain in detail 'Irridium'. 08
Explain working of GPS system 06