[time-nuts] WWVB PM Time Questions

[Bob kb8tq]

Hi

It also *very* much depends on the stability of your local reference and the 
stability of the ionosphere. Unless both are “pretty darn good” a hundred second
integration is utter nonsense 

Bob

> On Jul 31, 2020, at 5:00 PM, Poul-Henning Kamp <phk at phk.freebsd.dk> wrote:
> 
> --------
> Bob kb8tq writes:
> 
>> The WWVB modulation is *very* predictable. Once you have lock, 
>> you can guess just about every phase reversal you will see.
>> [...]
>> The point of this being that you *could* pre-flip the data before it
>> went into a buffer. That way the buffer integration time constant 
>> could be quite long. 
> 
> I would just use two buffers and decide which one based on the
> prediction, that way DC-offsets will not cause trouble.
> 
> -- 
> Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
> phk at FreeBSD.ORG         | TCP/IP since RFC 956
> FreeBSD committer       | BSD since 4.3-tahoe    
> Never attribute to malice what can adequately be explained by incompetence.