[time-nuts] software-defined WWVB receivers

J. Forster jfor at quikus.com
Sat Feb 22 14:17:13 UTC 2014


I was monitoring WWVB against a good local standard and evaluating 60kHz
'seeing' 30 years ago. Sometimes it is beautifully quiet, after a storm
front went through as I remember, at other times it's absolute hash...  to
the point that the HP 117A would not even hold lock.

-John

=================


> The randomness of WWVB propagation require incredibly long measurements
> to get an interesting degree of accuracy compared to a GPS driven
> solution.
>
> The WWVB signal does respond nicely to solar flares if measurements are
> integrated
> over one minute.  Check out the VLF monitoring stuff on my web page.
>
> On 02/21/2014 12:06 PM, John Seamons wrote:
>> As a starting point: Here's an extension of the SAQrx PC sound card
>> receiver that supports 192 KHz sample-rate sound cards. Enough to get
>> you WWVB.
>> <https://sites.google.com/site/swljo30tb>
>>
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>
> --
>       Chuck Forsberg WA7KGX   caf at omen.com   www.omen.com
> Developer of Industrial ZMODEM(Tm) for Embedded Applications
>    Omen Technology Inc      "The High Reliability Software"
> 10255 NW Old Cornelius Pass Portland OR 97231   503-614-0430
>
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