[time-nuts] Loran - any good for timekeeping?
Poul-Henning Kamp
phk at phk.freebsd.dk
Fri Apr 21 15:39:40 EDT 2006
In message <20060421.133311.35013386.imp at bsdimp.com>, "M. Warner Losh" writes:
>Can't you recover the time by tracking multiple chains and using the
>relationship between them to come up with at least small number of
>possible seconds? Hasn't the US started broadcasting data that can be
>used to know which second you are at?
This is called "Time Of Coincidence" and it works generally OK.
In Europe where the chains have 4 digit GRIs it works much better
because most of the chains were chosen as prime numbers so they
only coincide very seldomly.
--
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.
More information about the time-nuts
mailing list