In message <bb05041d-f03a-42ac-85c6-467110fc3...@leapsecond.com>, "Tom Van Baak
 (lab)" writes:

>Rule of thumb: quartz is best short term, Rb or H-maser mid-term,
>and Cs by far the best long-term.

I have never seen a technical description of the Cs used in the
early GPS satellites, but I have seen many references to all sorts
of troubles with them, including a much shorter lifetime than
was hoped for.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
p...@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.
_______________________________________________
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Reply via email to