gps performance on the sgs3 from a different perspective:
As a pilot i used various devices for my moving map and flight logging softwares.
started with nokia, continued with htc and now got my new sgs3.
my experience with the android devices:
- htc desire: the desire made a quite good job in getting the
satfix really quick (less than 15 seconds) without a-gps. i simply use the
gps without the assistance of downloading the new gps data since up in the
air you mostly dont have a data connection. the desire wasn't really accurate
in keeping the track. when i check my logfiles of the flights in a replay-software
(igc-replay with google earth) the tracks often had strange curves and inaccurate
for up to 300 feet once in a while.
- htc desire hd:
satfix sometimes took forever, tracking was even less accurate.
the desire hd lost the gps-signal every 2-3 minutes and sometimes
i had to restart the device in the air to get one more satfix. totally useless
phone for gps-accurate use!
- htc sensation:
made a quite good job. satfix within 10 seconds, was keeping gps-signal for
complete airtime, never lost the signal. track recording was accurate with tolerance
of 30-60 feet (estimated). the sensation made a good job and was even comparable
to onboard gps-devices. bigger errors during takeoff and landing, where the device
showed some errors in vertical altitude. (replay starting lift too late or doesnt show
the exact climb or descending rates)
- sgs3:
satfix within 3 seconds (without agps data!). never lost gps-signal like the sensation.
now the glonass support seems to come into the game: the device is able to record
flight tracks with a tolerance (vertical and horizontal error) within a few feet. i would
estimate 3-6 feet maybe. glonass is another gps system from russia and the sgs3
(like the nexus and the note) is able to pick up those sat signals additionally to the one
provided by pure gps alone. also the built in barometer (another fact why i bought this
device!) is able to notice vertical altitude differences every 13 cm, thats about the screen
size of the phone itself! takeoff and landing shows a really precise log within the replay
software. also the phone is able to record loopings and parabolic flights.
absolutely amazing phone when it comes to gps performance.
also the sgs3 is the first phone in my hands that is able to have a satfix inside a building!
if you want an amazing gps-phone go get the sgs3.
greetings!