[time-nuts] NIST

Mark Spencer mark at alignedsolutions.com
Mon Aug 13 09:43:14 EDT 2018


I'll just add:

I got into time nuts after I acquired a GPSDO for checking the frequency accuracy of my amateur radios.  I realized I needed a GPSDO when I couldn't figure out if I was seeing drift in my radios frequency standards or Doppler shift from WWV transmissions while using WWV as a frequency reference.

To recap a prior post I do use WWV fairly often as a time source (mostly when I am in "the field") and I have occasionally used WWV as a frequency standard (not withstanding my concerns about Doppler shift.)   All of this is for non commercial / hobby use. 



Mark Spencer

Aligned Solutions Co.
mark at alignedsolutions.com
604 762 4099

> On Aug 13, 2018, at 2:10 PM, Bob kb8tq <kb8tq at n1k.org> wrote:
> 
> Hi
> 
> Ok, this is Time Nuts. We probably have a pretty good sample of those who use this and that as a source of time.
> We also are reasonably conscious about what we are doing. NIST’s claimed reason for running WWV (and WWVH) is to
> distribute accurate time and frequency.
> 
> Would / does anybody on the list actually use WWV as their *primary* source of accurate time or accurate frequency?
> 
> Ok, so how about as a secondary source of time?
> 
> Now show of hands …. third tier backup? 
> 
> I’ll place my votes first …. rarely as a third tier backup. Why? It’s just not good enough any more compared to the other 
> things I have easily available. 
> 
> No, I”m not debating how badly we need third or eight tier backups. The question is purely - what is it actually used for?
> 
> Bob
> 
>> On Aug 13, 2018, at 8:39 AM, jimlux <jimlux at earthlink.net> wrote:
>> 
>> On 8/12/18 8:40 AM, Craig Kirkpatrick wrote:
>>> I agree with Bob that shutting down WWVB would not go over well with the voters but losing WWV and WWVH will mainly be noticed only by HAMs.
>> 
>> 
>> WWV/WWVH also provides HF propagation forecasts, severe weather warnings for mariners, etc., as well as being a propagation beacon.
>> 
>> I don't think HF communications is completely going away - it's unique in not requiring any infrastructure to achieve world-wide communications other than the two endpoints of the link.
>> 
>> It's probably a smaller population than radio amateurs, but there are people who work with HF propagation on a day to day basis. For example, if Rocketlabs ever gets their act together and launches a couple more rockets, I'll have a spacecraft in LEO for which I intend to use WWV and WWVH as calibration sources.
>> 
>> 
>> 
>> 
>> 
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