[time-nuts] Lots of Off Topic discussion

William H. Fite omniryx at gmail.com
Sat Sep 1 17:04:55 EDT 2018


With respect, Scott, EVERY ham knows about WWV.


On Saturday, September 1, 2018, Scott McGrath <scmcgrath at gmail.com> wrote:

> I’m concerned with the science
>
> the WWV/WWVB stations provide invaluable information about the condition
> of the ionosphere with a baseline of DECADES of data.
>
> Also dont forget that pre PSK the NTP daemon in unix had a interface for
> Spectracom WWVB receivers and any retrofitted with a D-PSK’er still provide
> network time within all national banking regulations.
>
> As to GPS Jamming well I think its essential that sophisticated GPS users
> like this community educate decision makers in their sphere of influence
> just how FRAGILE a system GPS is.    I realize some dont want to hear this
> but its essential that we as a technological society create backup systems
> using different techology bases to deliver precise time and frequency in an
> economical fashion because not everyone can afford a couple of 5071’s.
>
> As to only ‘hams’ using them I dont think many hams unless they are
> running vintage Collins gear with a WWV position on the bandswitch to align
> the PTO,  even know about WWV.
>
> Most of the WWV users  I know personally are atmospheric scientists,
> military and other government users.
>
>
>
> Content by Scott
> Typos by Siri
>
> On Sep 1, 2018, at 2:37 PM, Brian Lloyd <brian at lloyd.aero> wrote:
>
> On Sat, Sep 1, 2018 at 9:13 AM, David G. McGaw <
> david.g.mcgaw at dartmouth.edu>
> wrote:
>
> > I consider saving WWV/WWVH/WWVB to be ON topic.  They may not be as
> > precise as some on this list like to achieve, but they are publicly
> > available methods of time dissemination.  I am very concerned that
> factions
> > of NIST consider that this should no longer be part of their mission.
> >
>
> I think it is still on-topic for the following reasons:
>
> 1. In many parts of the world, WWV is still a convenient time reference.
> You can get human-accurate time with nothing more than a $20 shortwave
> receiver.  No, it is not time-nuts accurate but it will do for most things
> that people do, including celestial navigation and knowing when to come to
> dinner.
>
> 2. It is a stable RF source for people monitoring changes in the the
> ionosphere. Whatever else it is, we KNOW they are emitting ON 2.5, 5, 10,
> 15, 20, and 25 MHz.
>
> I also consider the discussion of GPS jamming to be relevant because, for
> people who DO want/need time-nuts accuracy, GPS is far and away the most
> convenient reference. Knowing how it might fail is useful.
>
> YMMV.
>
> --
>
>
>
> Brian Lloyd
> 706 Flightline
> Spring Branch, TX 78070
> brian at lloyd.aero
> +1.210.802-8FLY (1.210.802-8359)
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