Re: LF: Re[2]: LF: Re: DK7FC EbNaut message on 8270.1 Hz decoded nr Moscow by RN3AUS

[Alex K <rn3aus@gmail.com>]

Hello VLF, Stefan!
Easy and fast decode! Wow!
I make some improvements by switching off MIC gain. Now sound input is not overloaded at night time...
Grabber will run to Monday or longer, I will visit it for results at Monday.
73!
ebnaut-rx V0.5
input file C:\EbNaut\VLF_EBNAUT\EbNaut\ebnaut15_FEB_2251_8270-1pps.wav
sample rate 0.342935 per second
rx frequency 8270.1
file start time 2017-02-15 16:13:47.290
polynomial 8K19A
crc size 16
number of chars 5
block size 46
symbol period 60.000
number of symbols 512
list length 20000
start offset 14184.674
freq offset 0.000000
cores 1
skipped 14183.445843 seconds to start
initial reference phase 5.3
---------------------------------------------
found DL-RU
list rank 3151
reference phase  180  180  180  180
carrier RMS 2.988e-005 noise RMS 5.866e-006
carrier S/N 14.14 dB in 32.6 uHz
carrier Es/N0 -12.95 dB
carrier Eb/N0 -0.41 dB
info bit period 1077.89 seconds
symbol error rate 208/512 = 40.625 %
Es/N0 from symbol errors -15.5 dB
Eb/N0 from symbol errors -3.0 dB
Shannon capacity 4.3 bits/hour
Shannon efficiency 78.1 %
symbols file C:\EbNaut\VLF_EBNAUT\EbNaut\ebnaut15_FEB_2251_8270-1pps-symbols.csv
elapsed 8 seconds
---------------------------------------------
found DL-RU
list rank 363
reference phase  180  180 -150 -150
carrier RMS 3.088e-005 noise RMS 5.866e-006
carrier S/N 14.43 dB in 32.6 uHz
carrier Es/N0 -12.67 dB
carrier Eb/N0 -0.12 dB
info bit period 1077.89 seconds
symbol error rate 202/512 = 39.453 %
Es/N0 from symbol errors -14.4 dB
Eb/N0 from symbol errors -1.9 dB
Shannon capacity 4.6 bits/hour
Shannon efficiency 73.2 %
symbols file C:\EbNaut\VLF_EBNAUT\EbNaut\ebnaut15_FEB_2251_8270-1pps-symbols.csv
elapsed 97 seconds

2017-02-16 16:36 GMT+03:00 Paul Nicholson <vlf0403@abelian.org>:

Stefan wrote:

> f = 8270.100000 Hz
> Start time: 15.Feb.2017   20:10:00 UTC
> Symbol period: 60 s
> Characters: 5
> CRC bits: 16
> Coding 8K19A

A good transmission this time.  Decoded here Eb/N0 = +7.6 dB.

Just for fun I decoded it on the RPi model 2, it took 20
seconds to decode.

Now over to Alex - good luck!

--
Paul Nicholson
--

DK7FC-15feb2017-2010z-1pps-ebnaut.png
Description: PNG image