It was a few hours before I got to the rx to retrieve the
battery so it continued on an almost dead battery and recorded
two more messages.
VO1NA 2015-12-05/06 16K21A 5S 5C QRO
start Eb/N0 Freq
13:30 13.0 -222 uHz
15:00 3.1 -256 uHz
16:30 3.9 -482 uHz
18:00 15.1 -558 uHz
19:30 17.3 -228 uHz
21:00 14.2 -330 uHz
22:30 18.7 -262 uHz
00:00 14.8 -253 uHz
01:30 17.0 -293 uHz
03:00 22.4 -41 uHz
04:30 20.8 -208 uHz
06:00 13.0 -216 uHz
07:30 17.0 -276 uHz
09:00 3.1 +20 uHz
Partial reception at 10:30 gave enough to measure +3 uHz.
I was able to measure the phase over the entire 21 hour
recording in 5 minute averages:
http://abelian.org/vlf/tmp/151206a.gif
This looks to me like propagation, not drift of the tx
oscillator. It's a pretty typical diurnal. I'm plotting
phase measured at a frequency offset of -255 uHz.
I think that Joe's oscillator is actually doing very well and
we are seeing mostly the effect of propagation. The phase ends
up nearly where it started and the total day/night change is
about -1250 degrees or about -3.5 cycles.
--
Paul Nicholson
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