In article ,
Doug McLaren wrote:

| Looks like it's CW (but not Morse Code -- instead, the encoding scheme
| is described on the page I gave.)

Ok, that's wrong. It's pulse width modulation -- close, but not
quite.

http://tf.nist.gov/timefreq/stations/wwvb.htm tells more.

Still, would be an interesting project.

--
Doug McLaren,
`When all you've got is a hammer, every problem looks like a nail.'