Note also Galileo uses Rb and H-maser only; no Cs. /tvb (iPhone4)
On May 4, 2013, at 1:53 PM, "Poul-Henning Kamp" <[email protected]> wrote: > In message <[email protected]>, "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 > [email protected] | 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 -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
