Re: VLF: VO1NA in Todmorden on 8270 Hz - also in Amberg?

[Paul Nicholson <vlf0403@abelian.org>]

Recent reception of VO1NA carrier in Todmorden, UK.  Measurements
in 34.7 uHz, daytime 10:00 to 18:00, nighttime 23:00 to 07:00.

            H-field                       (new) E-field
  29th     no signal detected
  29/30th  8.89 dB 0.04 fT  -47.5 deg     8.08 dB  -61.5 deg
  30th     no signal detected
  30/31st  10.60 dB 0.03 fT  -72.4 deg    7.90 dB  -50.4 deg
  31st     no signal detected
  31/1st   no signal detected
  1st      no signal detected
  1/2nd    13.18 dB 0.04 fT  -58.8 deg    13.36 dB  -65.2 deg
  2nd      no signal detected
  2/3rd    14.19 dB 0.06 fT  -89.2 deg    11.03 dB  -82.4 deg

I don't see any daytime signal at all recently. Nighttime signal
is quite repeatable, except for 31/1st when there was no trace
of the carrier - perhaps it was off?

The last two nights the signal is distinctly stronger, did you
make some improvements Joe?

> Paul mentioned 2.4 and 1.6 electrons on the E probe last spring.
> Are these numbers  per photon?

No, the total induced charge on the E-field probe.  At radio and audio
frequencies, photons have absolutely miniscule energy.

If the recent night S/N continues, combined E and H receivers make it
reasonable to try 5 chars of 16K23A with CRC-18 and 26 second symbols,
starting at 23:00 and finishing 07:05:20.  Expected Eb/N0 would be
around 0dB.

--
Paul Nicholson
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