Re:iPhone 14 Pro comes with dual-frequency GPS
by KennyBlanken on Saturday September 10, 2022 @08:06PM
(#32795613)
There are three things that lead to fast lock times for cell phones.
* Ephemeris and almanac data updated via the internet so the receiver doesn't have to wait for either and can immediately know what satellites to listen for and acquire.
* Precise clock via NTP so the receiver has a smaller solve space for its internal clock
* AGPS gives a very good position fix to further help with the initial clock and position solving
* Ephemeris and almanac data updated via the internet so the receiver doesn't have to wait for either and can immediately know what satellites to listen for and acquire.
* Precise clock via NTP so the receiver has a smaller solve space for its internal clock
* AGPS gives a very good position fix to further help with the initial clock and position solving