Satellite Communication (EC-603 (C)) - Important Questions

Explain the concept of orbit perturbations, including the principle of inclined orbits.

What is Frequency Allocation? List and briefly describe the main frequency bands used in satellite communication.

Given a satellite in an elliptical orbit around the Earth, use Kepler's second law to explain how the satellite's speed varies at different points in its orbit.

Design a sun-synchronous orbit and calculate orbital parameters for repeat pass at the same local solar time.

Explain local mean solar time and how sun-synchronous orbits maintain consistent local time for satellite observations.

Given a satellite with an apogee of 36,000 km and a perigee of 500 km, calculate the semi-major axis and eccentricity of the orbit. Assume a circular Earth with a radius of 6,371 km.

What is a geostationary orbit and what are its key properties and advantages for communication satellites?

What are the limits of visibility for geostationary satellites and what factors determine visibility from a specific location on Earth?

Define antenna polarization and describe the different types of antenna polarization commonly used in satellite communications.

Discuss the various types of launching orbits used for placing a satellite into a geostationary orbit. Highlight the advantages and disadvantages of each.

Define cross-polarization discrimination and explain its importance in satellite communications.

Discuss the significance of the space segment in enabling global communication networks and how it revolutionized communication systems.

Discuss the role of transponders in satellite communication in relaying signals between ground stations.

Explain the setup and functionality of a receive-only home TV satellite system and the types of signals it can receive.

Describe the satellite subsystems of Attitude Control, Station Keeping, and TT&C and their importance in satellite operations.

Explain the function of transponders and discuss different types of antenna subsystems used in satellites.

Explain the concept and components of a transmit-receive earth station in satellite communication.

Define EIRP, explain how it is calculated, and explain its importance/significance for coverage area and signal strength in satellite communication.

Define System noise. Discuss the effects of system noise on the quality and reliability of satellite communication links.

Explain how rain attenuation is quantified and its impact on satellite communication system performance.

Calculate the overall C/N ratio from uplink, downlink and intermodulation C/N values and suggest a method to reduce intermodulation noise.

Discuss the challenges and considerations in designing the uplink of a satellite communication link, including effects of atmospheric conditions.

Outline the steps for installing a DBS-TV antenna and explain how obstacles like buildings or trees affect installation.

Outline the steps involved in designing and implementing a VSAT network for connecting remote sites, including network planning, equipment selection and installation.

Write short notes on selected satellite topics (satellite radio broadcasting, VSAT link margins, Kepler's laws, Morelos and Satmex 5).

Explain the components and functions of a VSAT earth station and the basic transmission techniques used in VSAT systems.

Discuss error control methods used in digital DBS-TV and their importance for broadcast quality.