[time-nuts] WWVB data to play with

[John Ackermann N8UR]

While everyone's been talking :-) , I recorded some WWVB IQ data for 
folks to play with.  You can download it from
http://febo.com/pages/wwvb/

The receiver ran at 48 ksps and was centered on 80 kHz (to allow a 20 
kHz IF to move away from 0 Hz crud).  The data was taken in early 
afternoon in Dayton, Ohio.  WWVB was easily visible in an FFT.

I used a Red Pitaya driven through a 500 kHz low pass filter by a 
Clifton Labs voltage probe antenna with 1 meter vertical whip.  The Red 
Pitaya, was loaded with firmware that emulates an HPSDR radio.  I used 
Gnuradio with the "HermesNB" source block that Tom McDermott, N5EG, wrote.

There's a ten minute IQ recording that includes the top of the hour at 
http://www.febo.com/pages/wwvb.  The file is in Gnuradio binary format, 
which is complex data stored with real and imaginary parts interleaved 
in successive 32 bit floats

I'm going to continue putzing around and will likely upload additional 
samples.  If anyone would like some specific chunk of spectrum, just let 
me know.  And if you do anything interesting with the data, please share 
it with the list!

John
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