Hi Ummm … errrr …. it’s a gas cell standard. I’d bet there is a pressure effect.
Bob > On Mar 21, 2017, at 7:01 PM, Scott McGrath <scmcgr...@gmail.com> wrote: > > Noted > > However CSAC not subject to barometric effects as Rb units are > > Content by Scott > Typos by Siri > >> On Mar 21, 2017, at 4:18 PM, jimlux <jim...@earthlink.net> wrote: >> >>> On 3/21/17 12:51 PM, Scott McGrath wrote: >>> Or perhaps use the Symmetricom CSAC ... >>> >>> Relatively expensive but might work >>> >> >> >> The CSAC is 8E-12 AVAR at 1000 seconds, comparable to a Rb. >> >> >> See also http://tycho.usno.navy.mil/ptti/2011papers/Paper27.pdf >> which shows a bit better performance (3E-12 @ 1000s), but the best >> performance appears to be at 10,000 seconds. >> >> >> but don't you need better? >> Attila wrote> You will need a stability 1e-14 @1d. >> _______________________________________________ >> 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. > _______________________________________________ > 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. _______________________________________________ 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.
