Charles like you I have quite a few gpsdo's that are far superior to wwvb at least on the east coast in reality. But all of that said I actually used wwvb more for propagation studies to watch the ionosphere. Its always been interesting. Not that any of it matters if all of GPS is gone my real interest will be water, food, and heat. I certainly spent the time building doublers, costas loops, and a large box full answers that do not depend on GPS and yes they work till they skip a cycle and you get a 180 degree phase shift in the chart. Those have been shared with Time-nuts over the years. There are other approaches I may also explore now that I have the codes figured out. But after 3 years a break would be good and after all it was a 90 day project. Ooops that wasn't the case.
I am looking forward to someone releasing a SDR version completely independent of GPS. But at that point there is no longer a need for the old receivers either as it can all be done very nicely in software complete with phase measurements in about 2 Lbs and 5 watts. I am scratching my head a bit here. It seems as though the 500 KB document may have come through. But I never received a copy. Regards Paul. WB8TSL On Thu, Sep 24, 2015 at 5:11 PM, Charles Steinmetz <[email protected]> wrote: > Paul wrote: > > Here is the detailed document on the wwvb d-psk-r. >> > > Interesting solution, and a good study in persistence. Congratulations! > But I thought the main point of having a working WWVB receiver was as a > backup if GPS fails (or for use in circumstances where WWVB reception is > possible but not GPS reception). If GPS is working, and you have a GPS > rx/GPSDO, what is the point of having a time and/or frequency source that > relies on GPS but only has the precision of WWVB? And what good is the > predictive de-psk-r when GPS is not working? > > [Yes, I get that if one runs a museum it's nice to have working exhibits > even if they are simulated, and it's no big deal if the exhibits don't work > from time to time. But the curator's solution doesn't seem to solve the > time-nuts' real problem.] > > I hasten to add that I don't really care one way or the other about GPS > alternatives, particularly alternatives with the relative imprecision of > WWVB over time scales shorter than geological. Personally, I presume that > if there is ever a persistent, system-wide GPS failure it will be due to a > natural or man-made catastrophe of earthshaking proportions (literally) and > there will be many, more urgent concerns than time-nuts' experiments. But > others have expressed concern over having just one time and frequency > standard available. For them, isn't a fully independent solution that does > not rely on GPS required? > > Again, congratulations on bringing this idea to fruition. > > Best regards, > > Charles > > > _______________________________________________ > 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. > _______________________________________________ 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.
