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LF: Re[2]: VLF: New carrier on 6470.005 Hz

from [Alex K] [Permanent Link][Original]
To: [email protected]
Subject: LF: Re[2]: VLF: New carrier on 6470.005 Hz
From: Alex K <[email protected]>
Date: Fri, 21 Apr 2017 19:07:05 +0300
Authentication-results: f107.i.mail.ru; auth=pass smtp.auth=[email protected] smtp.mailfrom=[email protected]
Cc: DK7FC <[email protected]>
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In-reply-to: <[email protected]>
References: <BC06FB131E2047AB94F399AE497C3A11@AGB> <[email protected]> <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
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


Пятница, 21 апреля 2017, 10:28 +03:00 от 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

Attachment: /21uHz-6470-18-21apr2017.png
Description: PNG image

Attachment: /47uHz-6470-21Apr2017.png
Description: PNG image

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