If you’re in North America, a CHU receiver is a lot easier to make than WWV/WWVH. The CHU timecode is just BEL 103 AFSK at 300 baud - it was a one-chip solution 20 years ago when I made one in college. On the software side, you’ll want a serial line discipline kernel module of some sort that timestamps the incoming characters. The result is as good as HF radio will get you, which is to say probably 2 or 3 orders of magnitude minimum worse than GPS.
IMHO the diversity of which you speak is exactly what NTP delivers. I believe NIST and USNO run NTP servers that aren’t sourced from GPS. Folks with Cesium clocks could conceivably do the same to provide independent standards. > On Oct 25, 2016, at 11:54 PM, Hal Murray <hmur...@megapathdsl.net> wrote: > > > tsho...@gmail.com said: >> I'm all for a diversity of systems - putting all our eggs in the GPS basket >> seems unwise (and I maintain WWV receivers hooked to NTP at home!) > > What is available in the way of WWV receivers? Anybody got a summary handy? > > > -- > These are my opinions. I hate spam. > > > > _______________________________________________ > 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.
