[time-nuts] GSP clock stabilitiy, Rb vs Cs

Poul-Henning Kamp phk at phk.freebsd.dk
Sat May 4 16:53:41 EDT 2013

In message <BB05041D-F03A-42AC-85C6-467110FC3466 at 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
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