Define satellite communication. What is its basic principle?
[3 marks]Write a short note on the frequency bands (L, C, Ku, Ka) used in satellite systems and their significance.
[4 marks]Compare the advantages and disadvantages of satellite communication with that of microwave terrestrial systems.
[7 marks]State Kepler’s three laws of planetary motion and mention their significance in satellite motion.
[3 marks]Derive the expression for orbital period using Kepler’s third law.
[4 marks]With a neat diagram, explain semi-major axis, right ascension of the ascending node (Ω), the argument of perigees (ω), inclination, eccentricity, and true anomaly in an elliptical orbit.
[7 marks]Explain in detail the difference between solar day and sidereal day and how it affects satellite ground track patterns.
[7 marks]List the main subsystems of a typical communication satellite.
[3 marks]Describe the energy generation, storage, and distribution process in the satellite power subsystem.
[4 marks]Explain in detail the Telemetry, Tracking, Command, and Monitoring (TTC&M) subsystem with a neat block diagram and functions of each unit.
[7 marks]Mention the major functions of a communication subsystem.
[3 marks]Describe how thermal control is achieved in satellite subsystems.
[4 marks]Discuss the Attitude and Orbit Control System (AOCS) in detail — describe sensors, actuators, and control mechanisms used for orientation and orbit correction.
[7 marks]What is a solar eclipse on a satellite? Explain with figure.
[3 marks]Describe the sequence of events during a sun transit outage and its effect on signal quality. Page 1 of
[2 marks]Compare the impact of Doppler shift on GEO, MEO, and LEO satellite systems, and explain the compensation techniques used.
[7 marks]Define flux density in the context of satellite communication.
[3 marks]Explain how system noise temperature of a receiver is calculated using individual component noise figures.
[4 marks]Explain in detail the steps for preparing a satellite link budget, highlighting uplink and downlink power calculations and link margins.
[7 marks]Define C/Nratio and explain its importance in satellite link design.
[3 marks]Explain how rain attenuation affects the C/Nratio of a satellite link and how it is compensated.
[4 marks]Asatellite transponder uses TDMA to serve multiple earth stations. Explain the timing, synchronization, and guard time concepts involved in the system design.
[7 marks]Define multiple access and explain its necessity in satellite communication.
[3 marks]Compare Amplitude Shift Keying (ASK), Frequency Shift Keying (FSK), and Phase Shift Keying (PSK) in terms of bandwidth and power efficiency.
[4 marks]Compare TDMA, FDMA, and CDMA on the basis of channel allocation, synchronization, interference, and system capacity. Page 2 of
[2 marks]