Hi The gotcha with WWVB is correcting for the day / night ionosphere issues. Since they are not 100% predictable, it’s not a real easy problem to solve. Toss on top of the the ambiguous status of WWV or WWVB ( = will it be there next year …. if so in what format ….????) there layers and layers.
Best guess is that WWVB at a “one day” sort of range is a 10 ppt sort of thing. At the same observation time, GPS is a < 0.1 ppt sort of thing. If the objective is accuracy … WWVB come in a bit far back …. Bob > On Apr 6, 2019, at 7:27 PM, Wayne Holder <wayne.hol...@gmail.com> wrote: > > Perhaps this has been mention before, but I found the following document > while researching some details on WWVB and thought it might interest the > group: > > https://www.kevincroissant.com/WWVB/WWVB_PTTI_2018.pdf > > I know that Spectracom once made a WWVB Disciplined Oscillator in the form > of the Model 8164, but I figured that this approach probably was obsolete > in the era of GPS and network-based time. However, the author seems to have > produced some interesting results. Has anyone else built, or tried to > build a WWVB Disciplined Oscillator? > > Wayne > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
