Each subframe (sent every six seconds) has the *GPS Time*. The GPS/UTC offset is only sent in subframe 4 of page 18 of the almanac data, i.e. once every 12.5 minutes.
Also, a comment on the ZDA message mentioned previously. I had tried that as part of my project R&D and it also returns "best guess UTC", just like RMC. i.e. if the receiver hasn't received the GPS/UTC offset, it doesn't actually report UTC. On 25 April 2012 19:22, StarTraX <[email protected]> wrote: > I've been reading up on the GPS signal structure, and it's true that it > takes 12 1/2 minutes for the full sequence, but... and this is a big but... > the GPS time and GPS/UTC offset are sent with every sub frame, and they > come by every six seconds. > So you can forget about waiting 12 1/2 minutes. before being certain of > the time! It's synchronized every 6 seconds. Its all well explained > in Wikipedia http://en.wikipedia.org/wiki/GPS_signals > -- Andrew -- 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
