[time-nuts] GPS message jitter (was GPS for Nixie Clock)

Gary E. Miller gem at rellim.com
Tue Jul 19 18:32:47 EDT 2016

Yo Mark!

On Tue, 19 Jul 2016 21:29:24 +0000
Mark Sims <holrum at hotmail.com> wrote:

> The NMEA sentences for sending date and time were very poorly thought
> out.  Several different sentences can contain the time (maybe the
> same time in different sentences with a group,  maybe each sentence
> has a different time).   Only the ZDA and RMC sentences have the
> date.  There is no sentence with unified time/date, position, and
> velocity info.

Yup, when you are talking NMEA.  There are a number of proprietary
binary messages that do.  Most of them are badly thought out in
different ways.

In practice, there is often no advantage to the binary over the NMEA
when gpsd is done with it.

Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
	gem at rellim.com  Tel:+1 541 382 8588
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