[Loadstone] Cold, warm or hotstart.

Rob Melchers rob at loadstone-gps.com
Wed Jan 7 22:20:34 GMT 2009


From:
http://www.loadstone-gps.com/articles/gps_rec.html

Hot start: Initiates a re-start using the stored almanac and ephemeris.
Warm start: Initiates a re-start using the stored almanac, deletes 
ephemeris data and downloads new ephemeris data from the GPS constellation.
Cold start: Initiates a re-start, deletes both the almanac and the 
ephemeris and downloads new data from the GPS constellation.

A 'cold start' happens after a receiver hasn't been used for a longer 
period, or when the receiver is activated at a large distance from the 
place where
the stored almanac was retrieved. A cold start can take up to 50 seconds. A 
warm start happens after a certain period of 'no coverage' and should not take
more than 35 seconds. A hot start may happen after a short loss of coverage 
and is usually shorter than 10 seconds.

Rob



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