prep [  0    0    0    0    0]
found rank 0 ber 4.0039e-01 Eb/N0 4.6 M -1.306843281e+00 [xx] ps [  0    0    0 
   0    0]
carrier phase: -15.0
carrier Eb/N0: 4.0
carrier S/N: 14.56 dB in 24.4 uHz
elapsed 36

VY 73

Jacek / SQ5BPF


On Sat, 22 Apr 2017, DK7FC wrote:

Date: Sat, 22 Apr 2017 00:53:06 +0200
From: DK7FC <[email protected]>
Reply-To: [email protected]
To: [email protected]
Subject: Re: LF: Re[2]: VLF: New carrier on 6470.005 Hz

Hi Alex and Eddie,

Unfortunately the messages are not correct. With just 2 characters it is hard 
to decide if the message makes
sense. We seem to be very close (beyond) the limit.
But hey we are far from doing trivial things, and it was one of the first 
attempts. So let's just try a few
more.
Your 47 uHz spectrograms show some encouraging traces.
Alex i can see on your 47 uHz spectrogram that the QRN is now rising. That 
makes it even harder. But the days
become shorter again in just 2 months! ;-)
>From Paul's measurements it looks like the band preferrs day time 
transmissions, at least in a range below
1000 km. Maybe this could even work on the way to Moscow?

I should try a long transmission of a short message during daytime:

f = 6470.100000 Hz
Start time: 22.Apr.2017   07:00:00 UTC
Symbol period: 40 s
Characters: 2
CRC bits: 32
Coding 16K21A
Duration: 11h, 22m, 40s
Antenna current: 460 mA


73, Stefan



Am 21.04.2017 18:07, schrieb Alex K:
      Hello VLF, Stefan!
      My "list of (false?) decodes":
      ebnaut-rx V0.5
      input file C:\TEMP\ebnaut20_APR_0123_6470-1pps.wav
      sample rate 0.342935 per second
      rx frequency 6470.1
      file start time 2017-04-19 18:45:28.390
      polynomial 16K21A
      crc size 20
      number of chars 2
      block size 32
      symbol period 30.000
      number of symbols 832
      list length 2000000
      start offset 883.574
      freq offset 0.000009
      cores 3
      skipped 883.549361 seconds to start
      initial reference phase 32.7
      ---------------------------------------------
      found NC
      list rank 418701
      reference phase    0    0    0    0
      carrier RMS 4.857e-005 noise RMS 1.716e-005
      carrier S/N 9.03 dB in 40.1 uHz
      carrier Es/N0 -20.17 dB
      carrier Eb/N0 -1.53 dB
      info bit period 2189.47 seconds
      symbol error rate 366/832 = 43.990 %
      Es/N0 from symbol errors -19.4 dB
      Eb/N0 from symbol errors -0.8 dB
      Shannon capacity 1.7 bits/hour
      Shannon efficiency 99.2 %
      symbols file C:\TEMP\ebnaut20_APR_0123_6470-1pps-symbols.csv
      elapsed 11 seconds
      ---------------------------------------------
      found WH
      list rank 452770
      reference phase  180  180  180  180
      carrier RMS 5.105e-005 noise RMS 1.716e-005
      carrier S/N 9.47 dB in 40.1 uHz
      carrier Es/N0 -19.73 dB
      carrier Eb/N0 -1.10 dB
      info bit period 2189.47 seconds
      symbol error rate 370/832 = 44.471 %
      Es/N0 from symbol errors -20.0 dB
      Eb/N0 from symbol errors -1.4 dB
      Shannon capacity 1.8 bits/hour
      Shannon efficiency 89.8 %
      symbols file C:\TEMP\ebnaut20_APR_0123_6470-1pps-symbols.csv
      elapsed 21 seconds
      ---------------------------------------------
      found BE
      list rank 219161
      reference phase   60   60   60   60
      carrier RMS 5.119e-005 noise RMS 1.716e-005
      carrier S/N 9.49 dB in 40.1 uHz
      carrier Es/N0 -19.71 dB
      carrier Eb/N0 -1.08 dB
      info bit period 2189.47 seconds
      symbol error rate 373/832 = 44.832 %
      Es/N0 from symbol errors -20.0 dB
      Eb/N0 from symbol errors -1.4 dB
      Shannon capacity 1.8 bits/hour
      Shannon efficiency 89.3 %
      symbols file C:\TEMP\ebnaut20_APR_0123_6470-1pps-symbols.csv
      elapsed 65 seconds
      ---------------------------------------------
      found V-
      list rank 232072
      reference phase   30   30    0    0
      carrier RMS 5.150e-005 noise RMS 1.716e-005
      carrier S/N 9.54 dB in 40.1 uHz
      carrier Es/N0 -19.66 dB
      carrier Eb/N0 -1.02 dB
      info bit period 2189.47 seconds
      symbol error rate 374/832 = 44.952 %
      Es/N0 from symbol errors -20.0 dB
      Eb/N0 from symbol errors -1.4 dB
      Shannon capacity 1.9 bits/hour
      Shannon efficiency 88.2 %
      symbols file C:\TEMP\ebnaut20_APR_0123_6470-1pps-symbols.csv
      elapsed 113 seconds
      ---------------------------------------------
      found WH
      list rank 200539
      reference phase -150 -150  180  180
      carrier RMS 5.386e-005 noise RMS 1.716e-005
      carrier S/N 9.93 dB in 40.1 uHz
      carrier Es/N0 -19.27 dB
      carrier Eb/N0 -0.64 dB
      info bit period 2189.47 seconds
      symbol error rate 366/832 = 43.990 %
      Es/N0 from symbol errors -19.4 dB
      Eb/N0 from symbol errors -0.8 dB
      Shannon capacity 2.0 bits/hour
      Shannon efficiency 80.7 %
      symbols file C:\TEMP\ebnaut20_APR_0123_6470-1pps-symbols.csv
      elapsed 121 seconds
      ---------------------------------------------
      found BE
      list rank 114596
      reference phase   60   60   30   30
      carrier RMS 5.345e-005 noise RMS 1.716e-005
      carrier S/N 9.87 dB in 40.1 uHz
      carrier Es/N0 -19.33 dB
      carrier Eb/N0 -0.70 dB
      info bit period 2189.47 seconds
      symbol error rate 361/832 = 43.389 %
      Es/N0 from symbol errors -18.5 dB
      Eb/N0 from symbol errors 0.1 dB
      Shannon capacity 2.0 bits/hour
      Shannon efficiency 82.0 %
      symbols file C:\TEMP\ebnaut20_APR_0123_6470-1pps-symbols.csv
      elapsed 127 seconds
      ---------------------------------------------
      found WH
      list rank 106975
      reference phase  180 -150  180 -150
      carrier RMS 5.378e-005 noise RMS 1.716e-005
      carrier S/N 9.92 dB in 40.1 uHz
      carrier Es/N0 -19.28 dB
      carrier Eb/N0 -0.65 dB
      info bit period 2189.47 seconds
      symbol error rate 368/832 = 44.231 %
      Es/N0 from symbol errors -19.7 dB
      Eb/N0 from symbol errors -1.1 dB
      Shannon capacity 2.0 bits/hour
      Shannon efficiency 80.9 %
      symbols file C:\TEMP\ebnaut20_APR_0123_6470-1pps-symbols.csv
      elapsed 470 seconds
      ---------------------------------------------
      found WH
      list rank 137768
      reference phase  180 -150  150  180
      carrier RMS 5.485e-005 noise RMS 1.716e-005
      carrier S/N 10.09 dB in 40.1 uHz
      carrier Es/N0 -19.11 dB
      carrier Eb/N0 -0.48 dB
      info bit period 2189.47 seconds
      symbol error rate 372/832 = 44.712 %
      Es/N0 from symbol errors -20.0 dB
      Eb/N0 from symbol errors -1.4 dB
      Shannon capacity 2.1 bits/hour
      Shannon efficiency 77.9 %
      symbols file C:\TEMP\ebnaut20_APR_0123_6470-1pps-symbols.csv
      elapsed 558 seconds

      I like "decode" BE: "to be or not to be that is the question"  :-)

      Files for reprocessing are here: 
http://rn3aus.narod.ru/ebnaut20_APR_0123.zip ;
      Also I have screenshots  21 uHz and 47 uHz 6470.005
      73 de rn3aus


            ???????, 21 ?????? 2017, 10:28 +03:00 ?? g3zjo 
<[email protected]>:

            On 20/04/2017 10:02, DK7FC wrote:

                  Last night i run another message:

                  f = 6470.100000 Hz
                  Start time: 19.Apr.2017   19:00:00 UTC
                  Symbol period: 30 s
                  Characters: 2
                  CRC bits: 20
                  Coding 16K21A
                  Duration: 6h, 56m
                  Antenna current: 460 mA

                  This is a chance for G3ZJO and RN3AUS and SQ5BPF. I generated 
EbNaut RX
                  files from the tree, the message decoded without a single bit 
error.


            Here are my complete results, just in case it contains any useful 
information. No
            decodes at all with with List Length 20000, I assume all falsies 
with 200000. The
            signal has been pretty poor in the last carrier transmission so I 
wasn't too hopeful..

            Incidentally I noticed in SpecLab that the clock on Button 3 of my 
Ebnaut instance was
            stopped at 10:26  UTC (and probably the waterfall scroll too) yet 
it is still spewing
            out files for EbNaut. There must be a clue there somewhere. Win7 
dual core processor,
            Hat 6 7/8, Shoe 9 UK, 44 EU.

            ebnaut-rx V0.6
            input file C:\Comms\EbNaut\20_APR_0121_6470.wav
            sample rate 0.342935 per second
            rx frequency 8270.1
            file start time 2017-04-19 18:43:06.270
            polynomial 16K21A
            crc size 20
            number of chars 2
            block size 32
            symbol period 30.000
            number of symbols 832
            list length 200000
            start offset 1025.293
            freq offset 0.000000
            cores 2
            skipped 1026.434179 seconds to start
            initial reference phase 74.7
            ---------------------------------------------
            found 89
            list rank 144418
            reference phase   60   60   60   60
            carrier RMS 2.861e-005 noise RMS 9.431e-006
            carrier S/N 9.64 dB in 40.1 uHz
            carrier Es/N0 -19.56 dB
            carrier Eb/N0 -0.93 dB
            info bit period 2189.47 seconds
            symbol error rate 374/832 = 44.952 %
            Es/N0 from symbol errors -20.0 dB
            Eb/N0 from symbol errors -1.4 dB
            Shannon capacity 1.9 bits/hour
            Shannon efficiency 86.3 %
            symbols file C:\Comms\EbNaut\20_APR_0121_6470-symbols.csv
            elapsed 44 seconds
            ---------------------------------------------
            found 89
            list rank 104145
            reference phase   60   30   60   30
            carrier RMS 2.962e-005 noise RMS 9.431e-006
            carrier S/N 9.94 dB in 40.1 uHz
            carrier Es/N0 -19.26 dB
            carrier Eb/N0 -0.63 dB
            info bit period 2189.47 seconds
            symbol error rate 369/832 = 44.351 %
            Es/N0 from symbol errors -19.9 dB
            Eb/N0 from symbol errors -1.3 dB
            Shannon capacity 2.0 bits/hour
            Shannon efficiency 80.6 %
            symbols file C:\Comms\EbNaut\20_APR_0121_6470-symbols.csv
            elapsed 229 seconds
            ---------------------------------------------
            found 2@
            list rank 49804
            reference phase  180  150  180  150
            carrier RMS 2.952e-005 noise RMS 9.431e-006
            carrier S/N 9.91 dB in 40.1 uHz
            carrier Es/N0 -19.29 dB
            carrier Eb/N0 -0.66 dB
            info bit period 2189.47 seconds
            symbol error rate 359/832 = 43.149 %
            Es/N0 from symbol errors -18.2 dB
            Eb/N0 from symbol errors 0.4 dB
            Shannon capacity 2.0 bits/hour
            Shannon efficiency 81.1 %
            symbols file C:\Comms\EbNaut\20_APR_0121_6470-symbols.csv
            elapsed 245 seconds
            ---------------------------------------------
            found 2@
            list rank 32051
            reference phase  180  150 -150  180
            carrier RMS 3.064e-005 noise RMS 9.431e-006
            carrier S/N 10.24 dB in 40.1 uHz
            carrier Es/N0 -18.97 dB
            carrier Eb/N0 -0.33 dB
            info bit period 2189.47 seconds
            symbol error rate 359/832 = 43.149 %
            Es/N0 from symbol errors -18.2 dB
            Eb/N0 from symbol errors 0.4 dB
            Shannon capacity 2.2 bits/hour
            Shannon efficiency 75.3 %
            symbols file C:\Comms\EbNaut\20_APR_0121_6470-symbols.csv
            elapsed 370 seconds

            73 Eddie G3ZJO