This has nothing to do with Android. GPS chipset features are OEM specific. Mobile phones use very cheap GPS chipsets with emphasis on power saving, not performance. If you need better GPS accuracy then get a 10Hz receiver. but even these are cheating, most of the time they just do intrapolation.
On Sunday, April 22, 2012 4:15:07 AM UTC-4, StarTraX wrote: > I'm trying to get the GPS time for a location using location.getTime on a > location listener using GPS_PROVIDER in my requestLocationUpdates. I was > expecting the provided time to be the time from the GPS clock - accurate to > billionths of a second, but rounded to the millisecond. What I am getting > depends on the platform, but certainly doesn't seem to be what I'm > expecting.<br/> > On SGS 11 - Android 2.3.3, the returned value is always an exact second, > with the millisecond portion always .000. From my experience with GPSs, it > seems to me unlikely that every polling of the GPS will occur exactly on > the whole second interval.<br/> > On an HTC-A7275 Android 2.3.3 - I'm getting the phone's system time, > certainly not the GPS time. <br/> > I confirmed these findingsby messing with the phone's time and examining > the location time.<br/> > The time stamps in NMEA sentences on the SGS 11 are provided to 3 decimals > of a second, but on the HTC, they're all xxx.0. The problem using NMEA is > that it's really messy getting the date and time and full position from > MNEA: It is only in the GPGGA sentence that has altitude, but it has no > date stamp so it get's tricky around midnight UTC.<br/> > I am looking for precise times - preferably to the millisecond for my > track logger, so that I can reliably compare tracks from different players. > Has anyone done any more work on this?<br/> > > -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
