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I'm finding that some GPSs (e.g. Garmin nüvi 2300) have a "HotFix" feature that causes satellite connections to be made more quickly.

How does this feature work? Is it internet/WiFi-based, is it similar to WAAS, or is it something else?

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http://voyager8.blogspot.com/2009/08/garmin-hotfix-technology-powered-by-rx.html

Apparently, the GPS predicts the future positions of satellites.

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