Re: VLF: First VLF detection DL > EA

[Markus Vester <markusvester@aol.com>]

Good decode of a friendly Italian four-letter word, 21.0 dB carrier Eb/N0 and flat phase in Nuernberg.

All the best 
Markus


-----Ursprüngliche Mitteilung-----
Von: DK7FC <selberdenken@posteo.de>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: Di, 5. Dez 2017 22:41
Betreff: Re: VLF: First VLF detection DL > EA

Hello Riccardo,

My congrats to your first VLF message decode! I confirm the message is correct.
You see now that VLF reception is possible from your QTH and you just need to get less noise on 8270 Hz maybe. But the system and frequency+phase stability is there! This weekend there may be a chance to pick up something on 8270...

The night is already a few hours old, so let's try just 4 characters:

f = 17470.1000 Hz
Start time: 05.Dec.2017  21:40:00 UTC
Symbol period: 30 s
Characters: 4
CRC bits: 16
Coding 16K21A
Duration: 08:00 [hh:mm]
Antenna current: 1 A

73, Stefan



Am 05.12.2017 19:43, schrieb Riccardo Zoli:

Hi Stefan, Luis, Paul, VLF

this is my decode (the first in VLF).
Very strong here, despite noisy reception.
Stefan, please could you try to send a faster message after sunset,
when SNR of your carrier is much better?
I made some tests whith EbNaut decoder: " ****** " message appear on
your carrier with 2 or 3 sec./sym (with a few +dBs of Eb/N0).

All the best

73 de Riccardo IW4DXW



2017-12-04 21:49 GMT+00:00 DK7FC <selberdenken@posteo.de>:
  

Hi VLF,

Tomorrow i'm going to gtry to pass a first EbNaut message over to EA5DOM.
Here are the details:

f = 17470.1000 Hz
Start time: 05.Dec.2017  07:00:00 UTC
Symbol period: 120 s
Characters: 1
CRC bits: 6
Coding 8K19A
Duration: 08:00 [hh:mm]
Antenna current: 1 A

73, Stefan

17k47_21uHz_12060105_sym.png
Description: PNG image