[time-nuts] GPS timing receivers

Poul-Henning Kamp phk at phk.freebsd.dk
Tue Oct 25 13:56:06 EDT 2005

In message <20051025.114507.13025778.imp at bsdimp.com>, "M. Warner Losh" writes:
>In message: <435E6BA2.8000906 at erols.com>
>            Chuck Harris <cfharris at erols.com> writes:
>: Because PPS isn't encoded in the loran signal.  The only way you
>: have of recovering PPS information is to know when the next time of
>: coincidence (TOC) will occur at your location, and start your 1PPS
>: at that time.  A TOC is when your master chain's starting pulse
>: happens to occur at an exactly the start of a UTC second.
>So timing LORAN-C receivers only look at one LORAN-C chain then?

Very few LORAN-C receivers are multi-chain.

I belive the Austron 5000M was multi-chain (and took a PDP/11 ?)

Megapulse have some multi-chain receivers as well.

I don't think I've seen any other.

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.

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