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GPS was originally developed by the US military for defence purposes and is based on a system of 24 satellites which orbit the earth. A GPS receiver can triangulate its position using Time Of Arrival (TOA) methods as long as at least three satellites are visible. Typically accuracy is around 2 to 10m although higher resolutions can be achieved. The cost of GPS hardware continues to fall and GPS positioning remains a free service to consumers. Integrating GPS hardware technology into cellular phones is one of the main positioning solutions being explored by handset manufacturers.

Media in category "GPS"

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This page was last modified on 17 March 2011, at 23:22.
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