Braille Live

GPS receivers: How they work
From space, GPS satellites transmit their signals to earth on different frequencies containing a multitude of data. It is the GPS receiver’s task to filter out these signals and convert them to data that can be used by navigational software such as Loadstone-GPS. To be able to do this, a GPS receiver is a powerful computer by itself. A complete GPS navigation unit therefore exists of two computers, the one in the receiver and the one on your PDA or phone.
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