Master of Science I (Electronics Science) Examination:
Oct/Nov 2016 Semester III (New CBCS)
SLR No. Day
Date Time Subject Name Paper No. Seat No.
SLR SJ
355
21/11/2016
Monday
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.
Use of nonprogrammable calculator is allowed.
Total Marks: 70
Q.1 Select correct alternatives: 06
angle is an angle that the orbital plane makes with the
equatorial plane.
Elevation Azimuth
Inclination Argument of perigee
When an earth station is in the northern hemisphere, and satellites is Se of
the earth station, then the Azimuth angle is
EIRP is the product of and
Receiving power, gain of receiving antenna
Transmitting power, receiving power
Gain of transmitting antenna, gain of transmitting antenna
Transmitting power, gain of transmitting antenna
A dish antenna is a type of antenna.
Patch Reflector
Array Wire
Outage time of Ka-band is per year.
0.01% 0.1%
0.1-0.5% 0.5%
Change in the orbital plane is called
Doppler shift Retrograde
Transit outage Precession
State True or false: 08
Eccentricity of an ellipse is in between zero and one.
The first satellite successfully launched by US was Telstar-I.
Page 1 of 2
Output power of a linear transponder is constant.
The Frequency band of DBS TV in ITU Region-1 is 10.7 12.75 GHz.
GPS constellation is designed for business links.
The ration of carrier to noise in inversely proportional to the ratio of gain
to temperature of the system.
A VSAT earth station receiver system uses cassegrain antenna.
Elliptical orbit is a type of non-geo synchronous orbit.
Q.2 Answer the following:
Explain telemetry and monitoring system of a satellite. 05
Write down the Kepler's three laws of planetary motion. 05
What is Inclined orbit? 04
0
Q.3 Answer the following:
A satellite is 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 and the eccentricity of the orbit.
07
Write down the three prototype models which give reliability to maintain the
space qualifications.
07
Q.4 Answer the following:
What AOCS sub-system? Give a brief account of spinner and three axis
stabilized satellite with a neat block diagram.
08
Write down the three prototype models which give reliability to maintain the
space qualifications.
06
Q.5 Satellite at a distance of 40000 km from a point on the earth's surface
radiates a power of 10W from an antenna with a gain of 17dB in the
direction of the observer. Find the flux density at the receiving point and the
power received by an antenna at this point with an effective area of 10m2.
05
Explain satellite link design procedure. 05
Write a note on CDMA. 04
Q.6 Explain coverage and frequency considerations of NGSO satellite 06
Explain the three segments of GPS. 08
Q.7 What is DBS-TV? Explain digital DBS-TV. 08
Discuss the advantages of satellite communication. Give the brief
explanation of working of satellite communication.