Re: VLF: A weekend for newcomers and advanced newcomers...

[Markus Vester <markusvester@aol.com>]

Your message was decoded here as well, even though my recording covered only 78% of the 11.3 hour sequence.

ebnaut-rx V0.5
input file 02270023.wav
sample rate 0.514405 per second
rx frequency 8270
file start time 2017-02-26 19:57:51.000
polynomial 16K21A
crc size 14
number of chars 12
block size 86
symbol period 24.000
number of symbols 1696
list length 20000
start offset -7064.000
freq offset 0.100000
cores 2
padded 7064.474 seconds at start
padded 1788.474 seconds at end
initial reference phase 4.0
---------------------------------------------
found X XXXX X XXX
list rank 0
reference phase    0    0    0    0
carrier RMS 2.601e+004 noise RMS 1.641e+003
carrier S/N 24.00 dB in 24.6 uHz
carrier Es/N0 -8.30 dB
carrier Eb/N0 5.65 dB
info bit period 595.09 seconds
symbol error rate 698/1696 = 41.156 %
Es/N0 from symbol errors -16.0 dB
Eb/N0 from symbol errors -2.1 dB
Shannon capacity 29.9 bits/hour
Shannon efficiency 20.3 %
symbols file 02270023-symbols.csv
elapsed 10 seconds

...oh, you too? What's her/his name?

73, Markus & Gizmo



-----Ursprüngliche Mitteilung-----
Von: DK7FC <selberdenken@posteo.de>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: So, 26. Feb 2017 12:05
Betreff: Re: VLF: A weekend for newcomers and advanced newcomers...

Thanks Eddie, Jacek and Paul for the decode.
The message is correct :-)

Alex/RN3AUS will have to search for 3 EbNaut messages now, 8ch, 10ch and 4 ch :-)

The normal carrier on 8270.005 Hz is still running. It will stay on the air until the EbNaut message begins.

The WX forecast looks good so i will try another EbNaut transmission. 12 characters, a critical value on the path to Moscow but who knows, maybe the QRN is low... We will come quite close to the limit!

f = 8270.100000 Hz
Start time: Sunday 26.Feb.2017   18:00:00 UTC
Symbol period: 24 s
Characters: 12
CRC bits: 14
Coding 16K21A
Duration: 8h, 32m, 0s
Antenna current: 700 mA

This is beyond the decode skills of my PC but i assume that many of you will have a better system available. Alex has 8 GB RAM at least so it will be possible and i stay at 16K21A.


73, GL, Stefan

02270023_sym.png
Description: PNG image