How about this: Brooke is watching the last of his cesium evaporate.
Bill Hawkins -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Brooke Clarke Sent: Wednesday, April 20, 2005 11:33 AM To: Discussion of precise time and frequency measurement; [EMAIL PROTECTED] Subject: Re: [time-nuts] Cesium DOES Drift, not Hi Rick: I agree. It's just that my FTS4060 IS drifting. The Excel equation and fit for a month of data as of this morning are: y = -1.2954x2 + 243.1x - 10631 R2 = 0.9607 Where y is in ns, x is the Day of Year and R2 is the quality of the fit (very good). The first derivative (after dividing by 86400) gives: Offset = -3E-14 * X + 243 i.e. minus 3E-14 per day. I'll keep watching and post from time to time, maybe this will stabilize??? Have Fun, Brooke Clarke, N6GCE -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com Richard (Rick) Karlquist (N6RK) wrote: >My understanding from talking to the experts is >that no aging, or environmental effects are observable >on the 5071A, and measurements have been made into >the 10^-15 range. Also, no systematic frequency offset >has been observed down to at least 1x10^-14. IE, >frequency offset between different 5071A's is randomly >distributed with a mean within 10-14 of laboratory >standards, such as Cs fountains. Knowing the way we >overdesigned the 5071A, I am not surprised that it >is this good. > >Rick Karlquist >(member of 5071A design team) > >_______________________________________________ >time-nuts mailing list >[email protected] >https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > > > > _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
