this is an impressive result!
I want to correlate the message against DL0AO and DF6NM data to see how
close we may have got. However copying the result from your
email produced only for 298 characters between the quotes - maybe
something has been lost in email formatting?
Von: Paul Nicholson <[email protected]
An: rsgb_lf_group <[email protected]
Verschickt: Di, 14. Nov 2017 12:06
Betreff: Re: VLF: A 300 char message?
> f = 8270.1000 Hz
> Start time: 11.November.2017 17:00:00 UTC
> Symbol period: 6 s
> Characters: 300
> CRC bits: 16
> Coding 4K19A
> Duration: 12:13:36h
> message start delayed by 15 minutes...
"HELLO PAUL AND THE REST OF THE LF GROUP! WELL, THIS IS THE NEW
LONGEST MESSAGE TRANSMITTED ON VLF. THANKS TO ALL STATIONS WHO
PARTICIPATE IN THE EXPERIMENTS SINCE 2010! VLF IS A GREAT REAGION
IN THE RF SPECTRUM. WHO KNOWS WHAT WE WILL DEVELOP AND DISCOVER
IN THE NEXT TIME :-D 73 DE DK7FC IN JN49IK"
using combined 12th/13th and 13th/14th.
Constant reference phase, Eb/N0 = +1.7 dB, BER 21.4%, list rank 0
S/N -12.40 dB in 1Hz, -46.38 dB in 2.5kHz.
11th/12th Eb/N0 = -4.4 dB, phase 101.5 deg, -18.50 dB in 1Hz;
12th/13th Eb/N0 = -2.0 dB, phase 92.5 deg, -16.07 dB in 1Hz;
13th/14th Eb/N0 = -0.6 dB, phase 100.6 deg, -14.73 dB in 1Hz;
11/12 + 12/13: -0.1 dB (no decode up to 6E6 list);
12/13 + 13/14: +1.7 dB (decodes BER 21.4% rank 0);
11/12 + 13/14: +0.7 dB (decodes BER 22.6% rank 82);
All three: +2.6 dB;