To: Swordmaker; VeniVidiVici
IIRC, in addition to using WiFi for a more accurate fix, the iOS devices use it to generate a preliminary position estimate while it’s waiting for GPS, which can be relatively slow in comparison (up to 15-20 seconds or so).
152 posted on
12/20/2011 7:15:07 AM PST by
kevkrom
(Separation of Business and State)
To: kevkrom
IIRC, in addition to using WiFi for a more accurate fix, the iOS devices use it to generate a preliminary position estimate while its waiting for GPS, which can be relatively slow in comparison (up to 15-20 seconds or so). That is essentially correct, but the iOS device already has a general idea of where it is from continually getting WIFI data. So the GPS is very fast when it does get the GPSatellite data.
166 posted on
12/20/2011 11:23:07 AM PST by
Swordmaker
(This tag line is a Microsoft product "insult" free zone.)
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