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

from [Markus Vester] [Permanent Link][Original]
To: [email protected]
Subject: Re: VLF: VO1NA in Todmorden on 8270 Hz - also in Amberg?
From: Markus Vester <[email protected]>
Date: Sun, 29 Oct 2017 11:43:07 -0400
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In-reply-to: <[email protected]>
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Yes Stefan I agree, the small peaks are no more than a vague indication and not yet near a proof of reception. Hope they are anyway encouraging.

Joe are you now using the higher antenna, or perhaps both in parallel? Employing phase feedback from a local E-field probe will make the transmitted phase repeatable, even with modifications to the antenna or matching circuit.

I'm afraid 16K25 may be too hard for my computer.

Best 73,
Markus

PS: What is the quantum efficiency of Paul's antenna, how many photons are needed to drive one electron?

  
-----Ursprüngliche Mitteilung-----
Von: DK7FC <[email protected]>
An: rsgb_lf_group <[email protected]>
Verschickt: So, 29. Okt 2017 16:24
Betreff: Re: VLF: VO1NA in Todmorden on 8270 Hz - also in Amberg?

Hm, we need evidence for claiming such distances i find. From my spectrogram i can see no clear trace on the exact frequency.
I'm running another spectrogram in the background, not displayed on the grabber but now in the attachment. It runs at 24 uHz. But even there i can see no clear trace.
I thought about stacking carrier transmissions and try to get EbNaut '*' messages in 16K25A or so, but not yet tried...
When the phase changes between the different days it gets difficult...
But i think decoding a 5 character message is certainly realistic in 3...6 days, if the phase is stable...

73, GL, Stefan

Am 29.10.2017 10:54, schrieb Markus Vester:
Joe, VLF,

it looks like VO1NA might have made it into Germany.

The DL0AO earth-antenna in Amberg shows small peaks both in 31.4 and 9.3 uHz (attached. Note that the 30 hours of the narrower FFT have only been partially filled last night). Also the 47 uHz spectrogram from Stefan's tree in Heidelberg may have picked up some energy on 8720.0075 Hz.

http://df6nm.bplaced.net/dl0ao/VLFgrabber/vlfgrabber_dl0ao_test.htm
http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html

Best 73,
Markus (DF6NM)

-----Ursprüngliche Mitteilung-----
Von: jcraig <[email protected]>
An: rsgb_lf_group <[email protected]>
Verschickt: Sa, 28. Okt 2017 21:12
Betreff: Re: VLF: VO1NA in Todmorden on 8270 Hz - also in Amberg?

Hi VLF,

There was a phase glitch at 1700-1800 ut today. It was a nice day for
aerial work and so hopefully the ERP has improved a bit on 8.2700075 kHz.
It is hoped to launch a few hundred billion VLF photons farther
east for Stefan and Markus in particular.

73
Joe VO1NA


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