If you track for a day, and draw a straight line throught the diurnal shift, you can easily see a frequency drift of 45 degrees. That's 1/8 cycle of 60 KHz or about 2 uS. So 2x 10 E-6 out of 10 E5, so you can see 2 x 10 E-11 in a day.
ASSUMING the lock does not break. -John =================== > Hi > > People rarely want to use WWVB mobile. The location of the transmitter and > receiver can be looked up on a map. The time of sunrise at both locations > should be something that could be calculated. > > Assuming you are willing to put up with all of that, you should be able to > do a first order correction on the shifts. The question obviously is - > just how good would the net result be? Is it a 5:1 sort of thing or do you > get a couple of orders of magnitude? > > Bob > > On Feb 8, 2010, at 6:40 PM, J. Forster wrote: > >> Yes, but WWVB is a PITA to use (because of the diurnal shifts) compared >> to >> LORAN. >> >> -John >> >> =============== >> >> >>> Hi >>> >>> WWVB is pretty safe. When they do a cost/benefit thing on these >>> services, >>> they take a look at how many taxpayers are using the service as >>> intended. >>> The "mission" of WWWVB is to put out time signals. There are a *lot* of >>> taxpayers with WWVB "atomic clocks" on their walls. >>> >>> Bob >>> >>> -----Original Message----- >>> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On >>> Behalf Of Don Henderickx >>> Sent: Monday, February 08, 2010 4:07 PM >>> To: Discussion of precise time and frequency measurement >>> Subject: [time-nuts] True to there word. >>> >>> The lights went out (actually red) on my Austron 2100 r this morning. >>> (whats next WWVB ?) >>> Don H >>> >>> _______________________________________________ >>> 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. >> > > > _______________________________________________ > 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.