# SC - QUESTION BANK

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```					QUESTION BANK

Unit – I
TWO Mark Questions: 1. List out the regulatory services provided by satellites. 2. What is the frequency range of following bands: Ku, L, C and VHF? 3. Define Kepler’s law. 4. What is the relationship between eccentricity e and the semi major axis a? 5. What is Orbital Period? 6. Calculate the radius of a circular orbit for which the period is 1 day. 7. Define Apogee, Perigee and Line of apsides. 8. Define Ascending node and Descending node. 9. Define Line of nodes. 10. Define Inclination. 11. Define Argument of Perigee. 12. Define Prograde and Retrograde orbit. 13. Define Right Ascension of the ascending node. 14. Define Mean Anomaly. 15. What are the six orbital parameters? 16. Write the equation for apogee and perigee height. 17. Write the equation for nominal mean motion. 18. Explain about Atmospheric Drag. 19. What is the height of Geostationary orbit? 20. What are the conditions are required for an orbit to be geostationary? 21. What is the height of the geostationary orbit? 22. Explain Sun transit outage. 23. Write some example for Non-geostationary orbit. SIXTEEN Mark Questions: 1. State Kepler’s laws of planetary motion. Illustrate in each case their relevance to artificial satellites orbiting the earth. 2. With the aid of the neat sketch, Explain what is meant by each of the angles: 1. Inclination 2. Argument of Perigee 3. Right Ascension of the ascending node. Which of the angle would you expect, in general to change with time? 3. Explain in detail about 1. Propulsion subsystems. 2. Station Keeping. 4. What is orbital Perturbation? Explain in detail about Perturbation effects. 5. Determine the rate of regression of the nodes and the rate of rotation of the line of apsides for the satellite parameters: I = 98.6328°, e = 0.0011501, n = 14.23304826.day-1, a = 7192.3 Km, K1 = 66063.1704 Km2.

Unit – II
TWO Mark Questions: 1. List out the communication payloads and supporting subsystems. 2. Define Payload? 3. List out the types of antennas used in satellite communication service. 4. Write the Link power budget equation. 5. What is EIRP? Give the equation. 6. What are all the losses included in satellite link power budget equation? 7. Write the equation for Satellite Uplink? 8. Write the equation for Satellite Downlink? 9. Define Input Backoff. 10. What is the relationship between input backoff and output backoff? 11. Write the equation for CNR. 12. Write the equation for Carrier to Noise power spectral density ration. 13. Define Noise power spectral density. Write the equation for No. 14. Define Noise Figure. 15. Write the equation for Overall System Noise Temperature. 16. Define XPD. Write the equation. 17. Define Polarization Isolation. 18. Write the short notes about Rain Depolarization. 19. Write the short notes about Ice Depolarization. 20. Explain what is meant by noise factor. For what source temperature is noise factor defined? SIXTEEN Mark Questions: Explain in detail about Communication Payload systems. Write short notes about Communication supporting subsystems. Derive the Overall system Noise Temperature equation. Derive the Link Power Budget equation with suitable terms. Write short notes on: 1. Propagation and 2. Polarization. Derive the Satellite uplink and downlink C/N power spectral density ratio using C/N ration. 7. A satellite link operating at 14GHz has receiver feeder losses of 1.5 dB and a free space loss of 207dB. The atmospheric absorption loss is 0.5dB, and the antenna pointing loss is0.5 dB. Depolarization losses may be neglected. Calculate the total link for clear-sky conditions. 1. 2. 3. 4. 5. 6.

Unit – III
TWO Mark Questions: 1. 2. 3. 4. 5. 6. 7. 8. 9. Define FDMA system. Define TDMA system. Define CDMA System. What is modulation? What is Multiple Access? Write the types of multiple access techniques. Write short notes about Spread Spectrum Communication Techniques. Define Compression and Encryption method. Write short notes about Digital Video Broadcasting.

SIXTEEN Mark Questions: 1. 2. 3. 4. Explain in detail about Analog Transmission systems. Explain in detail about Digital Transmission systems. Write short notes about 1. FDMA 2. TDMA 3. CDMA. Explain in detail about Spread Spectrum Communication Techniques.

Unit – IV
TWO Mark Questions: 1. 2. 3. 4. 5. Explain: Earth Station. What are the subsystems are placed in earth station? What is the purpose of Test equipments in earth station? What parameter is mainly used to compare antennas for system performance? Write the equation for overall efficiency, which must be used in calculating received carrier level. 6. Mention the 3 types of antenna mount. 7. Explain about MATV. 8. Explain about CATV.

SIXTEEN Mark Questions: 1. 2. 3. 4. Explain in detail about 1. Transmitter 2. Receiver in earth station. Draw the neat diagram of general earth station. Write short notes about Earth station Antennas. Write short notes about TVRO.

Unit – V
TWO Mark Questions: 1. 2. 3. 4. 5. 6. 7. What is LEO? What is MEO? Explain about VSAT. Define GSM. Define GPS. Write short notes about email and Internet. Write short notes about Satellite Navigational systems.

SIXTEEN Mark Questions: 1. 2. 3. 4. 5. 6. Write short notes about 1. Satellite Navigational System 2. Weather service. Write short notes about DTH and DBS. Explain in detail about VSAT. Explain in detail about GPS. Explain in detail about INSAT. Explain in detail about ITELSAT.

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