[time-nuts] GPS orthodontics: sawteeth & hanging bridges - the effect of time averaging

Poul-Henning Kamp phk at phk.freebsd.dk
Thu Dec 21 13:12:48 EST 2006


In message <003001c72528$6aa53540$6400a8c0 at EBS8500>, "Brooks Shera" writes:

>Averaging the sawtooth/bridge correction data for several averaging times 
>produced the following results (2):
>
>Avg Time    Standard Deviation     Residual Jitter
>none           8.4 nsec                     +/- 15 nsec
>30 sec        1.53                            +/- 4.3
>100 sec      0.79                            +/- 2.2
>300 sec      0.33                            +/- 0.7

What kind of environment did you have the oncore in ?

The nasty thing about the hanging bridges is that the better
thermal situation you have, the longer they last...

-- 
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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