ACTIVITY 4.1 - Understanding Satellite Internet: Technology, Infrastructure, and Comparison with Cellular Internet

 

Satellite internet operates by using a network of satellites in orbit to transmit and receive data. Unlike traditional broadband, which relies on terrestrial cables, satellite internet relies on radio waves to communicate between satellites and user terminals on the ground, such as satellite dishes. The infrastructure includes different types of satellites, such as geostationary satellites, which are positioned far above Earth at 22,236 miles, low Earth orbit (LEO) satellites, which operate closer to Earth at altitudes between 100-1,200 miles, and medium Earth orbit (MEO) satellites. LEO satellites are becoming more popular due to their lower latency, making them ideal for real-time applications like video conferencing. Ground stations act as intermediaries that connect the satellites to the terrestrial internet backbone, enabling data to be exchanged with the global internet. The user terminals, or satellite dishes, are essential for accessing the service, with modern versions being more compact and capable of auto-aligning to the satellite.

While satellite internet offers extensive coverage, especially in rural or remote areas where terrestrial broadband is unavailable, it is often criticized for its latency. The data must travel long distances to and from geostationary satellites, causing delays that can reach up to 600 milliseconds. However, LEO satellites provide lower latency, improving the overall user experience. Satellite internet speeds can range from 25 Mbps to 100 Mbps for traditional systems, but LEO satellite services like Starlink can offer speeds up to 1 Gbps with reduced latency. Satellite internet's wide coverage area is one of its greatest advantages, as it can provide access in places where other types of internet services, such as cellular, may not be available. On the downside, the cost of satellite internet tends to be higher, both in terms of initial setup and ongoing service fees, making it less affordable than terrestrial broadband.

When comparing satellite internet with cellular internet, the primary difference lies in their technology and coverage. Cellular internet depends on ground-based towers and generally has lower latency and more affordable service, particularly in urban areas. Satellite internet, however, provides coverage in remote and underserved locations where cellular signals may be weak or nonexistent. Despite offering broader coverage, satellite internet suffers from higher latency and is more sensitive to weather conditions, such as heavy rain or storms. Cellular internet typically has more consistent speeds and lower costs, but it is often unavailable in more rural or isolated regions. As technology advances, particularly with the development of LEO satellites, satellite internet could become a more affordable and competitive option, bridging the connectivity gap in hard-to-reach areas.

 

References:

UMATechnology. (2024, December 30). How does satellite Internet operate? UMATechnology

"Satellite and Fibre Internet." (2023, September 24). Technology Updates