Telecommunications Satellite Communications 2

Question 1

What is a VSAT (Very Small Aperture Terminal)?

Accepted Answer

A small ground-based antenna system for two-way satellite communications

Answer

A satellite in low Earth orbit used for broadband

Answer

A military frequency band allocation for satellite links

Answer

A satellite modulation technique for high-throughput links

Question 2

Which multiple access technique allocates satellite bandwidth dynamically based on actual user demand rather than fixed pre-assigned slots?

Accepted Answer

DAMA (Demand Assigned Multiple Access)

Answer

FDMA (Frequency Division Multiple Access)

Answer

TDMA (Time Division Multiple Access)

Answer

CDMA (Code Division Multiple Access)

Question 3

SpaceX's Starlink broadband internet service uses which type of satellite constellation?

Accepted Answer

LEO (Low Earth Orbit)

Answer

GEO (Geostationary Earth Orbit)

Answer

MEO (Medium Earth Orbit)

Answer

HEO (Highly Elliptical Orbit)

Question 4

What is 'rain fade' in satellite communications?

Accepted Answer

Attenuation of satellite signals by precipitation in the atmosphere

Answer

Signal loss caused by solar flare interference

Answer

Antenna misalignment caused by wind during rainstorms

Answer

Increased noise from moisture absorption in ground equipment

Question 5

The 'footprint' of a communications satellite refers to:

Accepted Answer

The geographic area on Earth that the satellite's signal can cover

Answer

The physical dimensions of the satellite body in orbit

Answer

The total frequency bandwidth the satellite's transponders use

Answer

The satellite's ground track as it moves through its orbit

Question 6

GPS (Global Positioning System) satellites orbit Earth in which orbit type?

Accepted Answer

MEO (Medium Earth Orbit) at ~20,200 km

Answer

LEO (Low Earth Orbit) at ~550 km

Answer

GEO (Geostationary Orbit) at ~35,786 km

Answer

HEO (Highly Elliptical Orbit) at variable altitudes

Question 7

What is the primary purpose of the beacon signal continuously transmitted by a communications satellite?

Accepted Answer

To allow earth stations to locate, track, and align their antennas

Answer

To carry commercial customer data traffic

Answer

To broadcast meteorological and weather data to subscribers

Answer

To relay telemetry data between satellite control centers