Re: Timing via serial port

[O'Connor, Daniel]

> On 30 Sep 2020, at 18:28, Hal Murray <hmurray@megapathdsl.net> wrote:
> Has anybody tested various GPS devices to see how good the timing via the 
> serial port is?
> 
> Some of the NMEA sentences have sub-second time stamps.  Are any of them 
> useful?
> 
> Has anybody looked at whether the front of the sentence (or burst) has better 
> timing than the end?

I would say it depends how tight your requirements are.
I setup USB serial to a GPS engine and fed NTP with it and it seemed quite good 
- certainly NTP was happy to use it and all the numbers look good.

I imagine it would also depend a lot on your hardware and OS as to what sort of 
jitter you would get.

--
Daniel O'Connor
"The nice thing about standards is that there
are so many of them to choose from."
 -- Andrew Tanenbaum