Satelliittiverkko

Satelliittiverkko refers to a telecommunications network that utilizes satellites in orbit to transmit and receive data. These networks are crucial for providing internet access, broadcasting television and radio signals, and facilitating communication in remote or underserved areas where terrestrial infrastructure is lacking or impractical.

The fundamental principle of a satellite network involves ground stations that communicate with satellites. These satellites, often in geostationary or low Earth orbit, act as relays, receiving signals from one ground station and re-transmitting them to another, or to a wide area of receivers. Geostationary satellites orbit at an altitude of approximately 35,786 kilometers above the Earth's equator, appearing stationary from the ground, which simplifies antenna pointing. Low Earth orbit satellites are closer to Earth, requiring a constellation of satellites to maintain continuous coverage.

Satellite networks offer several advantages, including global reach and rapid deployment. They are particularly valuable for disaster relief efforts, providing communication capabilities when ground networks are damaged. Furthermore, they enable services like GPS navigation and remote sensing. However, they can also experience latency due to the distance signals must travel, and their performance can be affected by atmospheric conditions. Despite these challenges, satellite technology continues to evolve, with advancements in satellite design and network architecture enhancing speed, reliability, and accessibility.