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Re: VLF: 8270: now 8269.990Hz

To: [email protected]
Subject: Re: VLF: 8270: now 8269.990Hz
From: Markus Vester <[email protected]>
Date: Fri, 1 Apr 2016 05:59:19 -0400
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Hi Uwe,
unfortunately static level was high, preventing your carriers before and after the PSK from showing up in my spectrogram. The EbNaut decoder produced "GL" at rank 13429 and -1 dB Eb/N0, but I have no clue whether this message is really correct.
Best 73,
-----Ursprüngliche Mitteilung-----
Von: Markus Vester <[email protected]>
An: rsgb_lf_group <[email protected]>
Verschickt: Do, 31 Mrz 2016 9:23 pm
Betreff: Re: VLF: 8270: now 8269.990Hz

Thanks Uwe. The late evening may not be ideal in terms of QRN background but let's try anyway. I have pushed out the antenna again (half height due to wind), and restarted the VLF grabbers with EbNaut recording since19 UT. 8270.000 is still within EbNaut's bandwidth (+-1/40 Hz) of your QRG so I hope that my new VLF neighbour Roland won't fire up tonight.
All the best,
Markus (DF6NM)

-----Ursprüngliche Mitteilung-----
Von: uwe-jannsen <[email protected]>
An: rsgb_lf_group <[email protected]>
Verschickt: Do, 31 Mrz 2016 6:38 pm
Betreff: AW: VLF: 8270: now 8269.990Hz

the carrier is on the air.
there will be a special message for Markus:
start 22:00:00
coding 8K19A
CRC 16
period 40
length 2
duration 04:05:20:00
Have fun

PS. rain would stop the transmission automatically.

Von: Markus Vester <[email protected]>
Gesendet: 24.03.2016 00:00
An: <[email protected]>
Betreff: VLF: 8270 March 22
Yesterday afternoon the noise was fairly moderate, and around 18 UT I caught a good dash in 63 uHz, presumably from DJ8WX. I then attempted simulated EbNaut decodes on the carrier, using 1 and 2 character settings and 40 s symbols. Both resulted in valid asterisk messages, with some more margin to spare for the single character. So far I have never decoded a real message on VLF, and I'd be keen to try...
Best 73,
Markus (DF6NM)


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