Geostationary orbit1/8/2023 ![]() As the cost of building and launching satellites decreases, the savings on not needing tracking equipment (and people to constantly monitor it) becomes more important.īy spending less on tracking equipment, companies can afford to devote more resources to developing new uses for satellites, such as using them to shoot full-colour videos from space, and make home repair quotes based on what they see from space. However, tracking a satellite that is constantly moving relative to the Earth requires very expensive equipment, compared to just pointing an antenna at the right part of the sky and leaving it pointed there.Īlso, because geostationary satellites do not cross each other’s paths, radio frequencies can be reused just a few degrees to the left and right of each satellite. Receiving information from a satellite requires antennas both on the ground and on the satellite. The reason for this is largely based on cost. If the satellite orbited farther from Earth, it would orbit slower than the Earth, and so would appear to move westward.īenefits of geostationary satellites: Most commercial communications satellites operate in geostationary orbits. If the satellite were closer to Earth, it would orbit faster than Earth rotates, so from Earth, it would appear to move eastward. The satellite then orbits not only at the same velocity as the Earth, but at the same rotation, remaining over the same spot as it moves. In order to remain directly above a particular location, a geostationary satellite must be placed in orbit directly above the equator at an altitude of 35,786 km (22,236 miles). How geostationary satellites work: A geostationary satellite orbits the Earth while remaining in place (stationary) above a particular spot. So, what does this term mean, and what does it have to do with how communications satellites work? When reading about the launch of new communications satellites, it is common to come across the term geostationary satellites. SpaceX alone expects to earn more than €27 billion in revenue by 2025 from its satellite constellation. ![]() SpaceX, OneWeb and Boeing are amongst the companies making plans to place hundreds of communications satellites in low-Earth orbit to provide internet access. Satellite internet has been growing at a rapid pace.
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