[time-nuts] GSP clock stabilitiy, Rb vs Cs
Tom Van Baak (lab)
tvb at leapsecond.com
Sat May 4 17:46:20 EDT 2013
Note also Galileo uses Rb and H-maser only; no Cs.
On May 4, 2013, at 1:53 PM, "Poul-Henning Kamp" <phk at phk.freebsd.dk> wrote:
> 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.
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