A satellite telephone, satellite mobile phone, or satphone is a mobile that connects straight with orbiting communications satellites. Depending on the building of a specific system, reception normally include the entire Earth, or just precise areas.
The mobile equipment, generally known as a terminal or perhaps earth station, ranges widely. A satellite phone handset has a length and width and weight comparable to that of a late 1980s or early on 1990s mobile, however usually with a large retractable antenna. These are well-liked on escapades into faraway locations where terrestrial cellular service is beyond reach.
A fixed set up, for instance used shipboard, may include large, rugged, rack-mounted electronics, and also a steerable microwave antenna on the mast that immediately tracks the overhead satellites. Sat handsets have notoriously poor clear signal indoors, though it can be possible to get a constant reception near a window or in the top floor of a construction if the roof is adequately thin. The mobiles have connectors for external antennae that are usually installed in vehicles and residences.
Several satellite phones use satellites in geosynchronous orbit. These systems can easily maintain near-continuous global reception with only 3 or 4 satellites, lessening the starting costs.
The negative aspect of geostationary satellite systems is that many places perhaps even where a large amount of open sky is present the line of sight between the mobile and the satellite is destroyed by problems for example steep hills and forest and the consumer needs to find higher ground before being able to use the mobile phone. This is not the example with Low Earth Orbit (LEO) services - though the reception is blocked by an obstacle you can wait a few minutes till another satellite transmits overhead.
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