Date: Fri, 14 Apr 2017 02:27:11 -0400
From: Markus Vester <markusvester@aol.com>
To: rsgb_lf_group@blacksheep.org
Message-Id: <15b6b24e427-51eb-1c309@webprd-a105.mail.aol.com>
In-Reply-To: <58EFF2D3.9020902@posteo.de>
MIME-Version: 1.0
Subject: Re: VLF: EbNaut on 6470.1 Hz
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Status: RO

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The transmission was decoded from DL0AO data (well, just!):


ebnaut-rx V0.5
input file dl0ao_04140130.wav
sample rate 0.514393 per second
rx frequency 6470
file start time 2017-04-13 21:05:19.620
polynomial 16K21A
crc size 18
number of chars 2
block size 30
symbol period 36.000
number of symbols 800
list length 200000
start offset 3288.000
freq offset 0.100000
cores 2
skipped 3287.372330 seconds to start
padded 235.229 seconds at end
initial reference phase -77.0
---------------------------------------------
.....
found xx
list rank 25047
reference phase  120  150  150  180
carrier RMS 5.550e-005 noise RMS 1.627e-005
carrier S/N 10.66 dB in 34.7 uHz
carrier Es/N0 -18.37 dB
carrier Eb/N0 0.09 dB
info bit period 2526.32 seconds
symbol error rate 367/800 =3D 45.875 %
Es/N0 from symbol errors -20.0 dB
Eb/N0 from symbol errors -1.5 dB
Shannon capacity 2.1 bits/hour
Shannon efficiency 68.4 %
symbols file dl0ao_04140130-symbols.csv
elapsed 988 seconds


Hint: The message content is similar but not identical that from March 29/3=
0.


Best 73,
Markus (DF6NM)=20


-----Urspr=C3=BCngliche Mitteilung-----=20
Von: DK7FC <selberdenken@posteo.de>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: Do, 13. Apr 2017 23:53
Betreff: VLF: EbNaut on 6470.1 Hz


VLF,=20

 OK, there are still some improvements to do on the new system but now thes=
e 8 stacks (8 x 33 T106-52 cores inside the field, they have a weight of 8.=
13 kg!) are inside the field. The actual resonance frequency is 20 Hz down =
but that's OK for tonite.=20
 At least the antenna current stays at 460 mA for tonite.

 Let's try a first EbNaut message on 6.47 kHz (not the first for Paul and m=
e but for Eddie and maybe Jacek...):

f =3D 6470.100000 Hz
 Start time: 13.Apr.2017   22:00:00 UTC
 Symbol period: 36 s
 Characters: 2
 CRC bits: 18
 Coding 16K21A
 Duration: 8h
 Antenna current: 460 mA

 73, Stefan
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<div style=3D"font-size:10pt;font-family:arial,helvetica,sans-serif;color:b=
lack;"><div style=3D"color: black; font-family: arial,helvetica,sans-serif;=
 font-size: 10pt;">The transmission was decoded from DL0AO data (well, just=
!):<br></div><div style=3D"color: black; font-family: arial,helvetica,sans-=
serif; font-size: 10pt;">ebnaut-rx V0.5<br>input file dl0ao_04140130.wav<br=
>sample rate 0.514393 per second<br>rx frequency 6470<br>file start time 20=
17-04-13 21:05:19.620<br>polynomial 16K21A<br>crc size 18<br>number of char=
s 2<br>block size 30<br>symbol period 36.000<br>number of symbols 800<br>li=
st length 200000<br>start offset 3288.000<br>freq offset 0.100000<br>cores =
2<br>skipped 3287.372330 seconds to start<br>padded 235.229 seconds at end<=
br>initial reference phase -77.0<br>---------------------------------------=
------<br>.....<br>found xx<br>list rank 25047<br>reference phase&nbsp; 120=
&nbsp; 150&nbsp; 150&nbsp; 180<br>carrier RMS 5.550e-005 noise RMS 1.627e-0=
05<br>carrier S/N 10.66 dB in 34.7 uHz<br>carrier Es/N0 -18.37 dB<br>carrie=
r Eb/N0 0.09 dB<br>info bit period 2526.32 seconds<br>symbol error rate 367=
/800 =3D 45.875 %<br>Es/N0 from symbol errors -20.0 dB<br>Eb/N0 from symbol=
 errors -1.5 dB<br>Shannon capacity 2.1 bits/hour<br>Shannon efficiency 68.=
4 %<br>symbols file dl0ao_04140130-symbols.csv<br>elapsed 988 seconds</div>=
<div style=3D"color: black; font-family: arial,helvetica,sans-serif; font-s=
ize: 10pt;"><br>Hint: The message content is similar but not identical that=
 from March 29/30.<br></div><div style=3D"color: black; font-family: arial,=
helvetica,sans-serif; font-size: 10pt;">Best 73,<br>Markus (DF6NM) <br><br>=
<br><br>-----Urspr=C3=BCngliche Mitteilung----- <br>Von: DK7FC &lt;selberde=
nken@posteo.de&gt;<br>An: rsgb_lf_group &lt;rsgb_lf_group@blacksheep.org&gt=
;<br>Verschickt: Do, 13. Apr 2017 23:53<br>Betreff: VLF: EbNaut on 6470.1 H=
z<br><br></div>
<div id=3D"AOLMsgPart_2_0c743096-1135-45f9-8804-b29ab5ca11f3">
<div class=3D"aolReplacedBody" text=3D"#000000" bgcolor=3D"#ffffff">
VLF, <br>
<br>
OK, there are still some improvements to do on the new system but now
these 8 stacks (8 x 33 T106-52 cores inside the field, they have a
weight of 8.13 kg!) are inside the field. The actual resonance
frequency is 20 Hz down but that's OK for tonite. <br>
At least the antenna current stays at 460 mA for tonite.<br>
<br>
Let's try a first EbNaut message on 6.47 kHz (not the first for Paul
and me but for Eddie and maybe Jacek...):<br>
<br>
<big><b>f =3D 6470.100000 Hz<br>
Start time: 13.Apr.2017 &nbsp; 22:00:00 UTC<br>
Symbol period: 36 s<br>
Characters: 2<br>
CRC bits: 18<br>
Coding 16K21A<br>
Duration: 8h<br>
Antenna current: 460 mA</b></big><br>
<br>
73, Stefan<br>
<br>

    <br>
    <br>
 =20
  <br>


</div>
</div></div>
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