GTU BE/B.Tech 2018 Winter Question Papers || Gujarat Technological University
Seat No.:
Subject Code: 2171007
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Enrolment No.
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VII (NEW) EXAMINATION - WINTER 2018
Subject Name: Satellite Communication
Time: 10:30 AM TO 01:00 PM
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Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
| Q.1 | (1) State Kepler’s first law. | MARKS |
| (2) Define eccentricity with figure. | 03 | |
| (1) State Kepler’s second law and explain it with figure. | 04 | |
| (2) State Kepler’s Third law. | 07 | |
| Q.2 | Define: (1) Subsatellite path. | 03 |
| (2) Apogee | 04 | |
| (3) Perigee | 07 | |
| (4) Line of apsides | ||
| (5) Ascending node | ||
| (6) Descending node | ||
| (7) Prograde orbit. | ||
| Describe orbital elements. | ||
| Q.3 | Define: (1) Retrograde orbit | 03 |
| (2) Argument of perigee | 04 | |
| (3) Mean anomaly | 07 | |
| (4) True anomaly | ||
| Explain Orbit perturbations such as: | ||
| Effects of a nonspherical earth With necessary equations. | ||
| OR | ||
| Describe antenna look angles with figures. | ||
| Q.4 | What are the conditions required for an orbit to be geostationary? | 03 |
| Explain limits of visibility with figure. | 04 | |
| Explain earth eclipse of satellite with figure. | 07 | |
| OR | ||
| What do you mean by near geostationary orbit? | ||
| Explain the function of Hohmann transfer orbit with figure. | ||
| Describe rain attenuation and derive equation for it. | ||
| Explain sun Transit outage. | ||
| Explain rain depolarization with figures. | ||
| Explain Cross polarization discrimination with figures. | ||
| OR | ||
| What is link power budget equation? Explain briefly. | ||
| With diagram explain the working principle of Community antenna TV System. | ||
| Explain attitude control in detail. Define passive attitude control and active attitude control. | ||
| Q.5 | (a) Explain ionospheric effects in radio wave propagation. | 03 |
| (b) Explain ionospheric effects in radio wave propagation. | 04 | |
| (c) With diagram explain the working principle of master antenna TV System. | 07 | |
| OR | ||
| (a) Explain atmospheric losses in radio wave propagation. | 03 | |
| (b) Explain ionospheric depolarization. | 04 | |
| (c) With diagram explain satellite switched TDMA. | 07 |
Date: 19/11/2018
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Total Marks: 70
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