SASTRA University 2010 B.Tech Electronics and Communications Engineering Satellite communication - Question Paper

Sastra University
Satellite communication
Sixth semester
ans all the ques.
1State Keplers 2nd legal regulations.
2. describe ascending and descending node.
3. describe sideral time.
4. elaborate the volumes involved for determination of look angles?
5. describe mean anomaly and actual anomaly.
6. describe Roll, Pitch and Yaw.
7. What is station keeping?
8. What is meant by redundant receiver?
9. Why TWTA's are widely used?
10. describe nutation dampers.
11. What is meant by antenna pointing loss?
12. What is an intermodulation noise?
13. What is meant by spin stabilization?
14. What is an apsorptive network?
15. What is preamble?
16. What is meant by digital speech interpolation?
17. What is meant by freeze out?
18. What is single access technique?
19. What is meant by space division multiple access?
20. What is dilution of precision?

Part-B
ans all t he ques.
21. discuss in detail about launches and different launch vehicles of satellite. Or
22. (A) Derive an formula to show that the kepler's laws are actual for a satellite in geostationary orbit.
Distinguish ranging from geo-synchronous and geo-stationary kinds of satellites. (7)
(B) discuss the subsequent terms: (8)
(I) Apogee (II) Perigee (III) Line of nodes (IV) Right ascension of the ascending node.
23. (A) discuss what is meant by thermal control and why this is necessary in a satellite? (7)
(B) define briefly the antenna subsystem. (8)
Or
24. (A) discuss about earth eclipse of satellite and sun transit outage. (6)
(B)Explain about wideband receiver and advanced Trios-N spacecraft (9)
25. (A) define the operation of a typical VSAT system. State briefly where VSAT systems obtain widest applications. (9)
(B) discuss why the LNA in a satellite receiving system is placed at the antenna end of the feeder cable. (6) Or
26. discuss briefly about (I) Uplink satellite circuit (7)
(II) Downlink satellite circuit (8)
27. (A) discuss demand-assigned FDMA (6)
(B) discuss in detail the operation of the SPADE system of demand assignment. What is the function of the common signaling channel? (9) OR
28. (A) discuss the operation of FDMA system with relevant diagram. (9)
(B) What is ALOHA system? discuss packet satellite networks. (6)

Earning:   Approval pending.