Date: Mon, 27 Feb 2017 13:33:02 +0100 (CET)
From: Jacek Lipkowski <sq5bpf@lipkowski.org>
To: rsgb_lf_group@blacksheep.org
In-Reply-To: <58B2B60C.2030803@posteo.de>
Message-ID: <alpine.DEB.2.11.1702271317380.642@mailn.lipkowski.org>
References: <CAGZ2MyYDKx5B6HSg1Z7XeoWZigvDgVS8XLT82A1aXW6ogFxFqg@mail.gmail.com> <58A6F8AF.70304@posteo.de> <58A8185E.600@posteo.de> <58A94DB4.7020005@posteo.de> <3ad8f7b7-5cbc-10c6-6816-a382ef25b29f@psk31.plus.com> <5F78A5280BA3412B9829C1E042E77593@AGB>
 <58A9A118.7050000@posteo.de> <OLNYV6$32689ED30984E988EAE91B325CCC8087@ik0vve.net> <58AAFE11.4060305@posteo.de> <OLP3BQ$C3FB68B3CBF9C6F86838A1F1078293F5@ik0vve.net> <58AC3E1C.8020800@posteo.de> <58ADAE49.6040608@posteo.de> <58ADE1B8.10009@posteo.de>
 <454f12d8-e89e-9f67-81fa-7de7891eefd1@psk31.plus.com> <58AED3A0.7010706@posteo.de> <alpine.DEB.2.11.1702231345090.642@mailn.lipkowski.org> <58AEDCFC.9080202@posteo.de> <58AF25B4.80304@posteo.de> <58AF273B.6020800@posteo.de> <58AF3677.7080205@posteo.de>
 <58B04028.9070505@posteo.de> <58B041D4.5050304@posteo.de> <58B1C07D.7040901@posteo.de> <fcdb9a1d-3168-6d31-f22e-be09c2f5a8d0@psk31.plus.com> <58B2B60C.2030803@posteo.de>
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Subject: Re: VLF: A weekend for newcomers and advanced newcomers...
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--17435139-913444907-1488198783=:642
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Decoded fine the 20170226 transmission (text send offline to Stefan). the 
Eb/N0 is small probably because of some problems with the receiver (it 
says that 9984s, or almost 3h were padded), probably because i was messing 
with the gps reference signal.

padded 9984.267 seconds at end
initial reference phase -17.4 amplitude 3.223e-01
prep [  0    0    0    0    0]
found rank 0 ber 4.5991e-01 Eb/N0 -9.0 M -1.204406548e+01 [XXXXXXXXXXX] ps [  0    0    0    0    0]
carrier phase: -14.9
carrier Eb/N0: 3.9
carrier S/N: 22.24 dB in 24.6 uHz
elapsed 41

VY 73

Jacek / SQ5BPF


On Sun, 26 Feb 2017, DK7FC wrote:

> Date: Sun, 26 Feb 2017 12:03:40 +0100
> From: DK7FC <selberdenken@posteo.de>
> Reply-To: rsgb_lf_group@blacksheep.org
> To: rsgb_lf_group@blacksheep.org
> Subject: 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
> 
> 
> 
> 
> Am 26.02.2017 10:16, schrieb g3zjo:
>
>       Nice decode of Stefan's Transmission, application for confirmation sent by PM.
>
>       found XXXX
>       list rank 0
>       reference phase    0    0    0    0
>       carrier RMS 5.550e-005 noise RMS 7.109e-006
>       carrier S/N 17.85 dB in 32.6 uHz
>       carrier Es/N0 -12.25 dB
>       carrier Eb/N0 4.27 dB
>       info bit period 1347.37 seconds
>       symbol error rate 392/1024 = 38.281 %
>       Es/N0 from symbol errors -13.5 dB
>       Eb/N0 from symbol errors 3.0 dB
>       Shannon capacity 10.0 bits/hour
>       Shannon efficiency 26.7 %
>       elapsed 5 seconds
>
>       73 Eddie G3ZJO
> 
>
>                         f = 8270.100000 Hz
>                         Start time: Saturday 25.Feb.2017   20:00:00 UTC
>                         Symbol period: 30 s
>                         Characters: 4
>                         CRC bits: 20
>                         Coding 16K21A
>                         Duration: 8h, 32m, 0s
>                         Antenna current: 700 mA
>
>                         73, Stefan
> 
> 
> 
>
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