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Date: Thu, 10 Feb 2011 06:24:34 -0800 (PST)
From: Daniele Tincani <danieletincani@yahoo.com>
To: rsgb_lf_group@blacksheep.org
In-Reply-To: <4CE2E571.6030500@iup.uni-heidelberg.de>
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Subject: LF: Recorded data for cross-correlation
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Hello Paul, VLF,

please found at following link:

http://www.megaupload.com/?d=3DMK0SVI5O

a 1MB WAV file containing about 5 seconds of the signal out from my simple=
=20
antenna system (small loop, pre-amp, transformer, sound card) sitting on=
 my=20
balcony. It was recorded with the audio settings of SpecLab configured for=
 96=20
Ksamples/s and 24 bits/sample.

The 26 KHz signal was not present, but TBB, DHO38, NAA were.

The recording was started at 13:54:00 UTC.

Best regards
Daniele


----- Forwarded Message ----
From: Paul <paul@abelian.netcom.co.uk>
To: VLF_Group@yahoogroups.com
Sent: Wed, February 9, 2011 12:40:16 PM
Subject: Re: [VLF_Group] Re: Transmission on 26.0 KHz

=A0=20

Daniele wrote:
> I could try to record something tomorrow,
> if it can be of some help.

Yes, that would be useful. To begin with, it doesn't
matter if 26kHz isn't transmitting - we just need Bafa
to be on the air so that we can see if cross-correlation
is possible and how sharp it is. If that works, I
can try to locate DHO or NAA as a test..

> I assume that recording the input stream in WAV
> format from inside SpecLab is OK.

That would be ideal.

I guess just five seconds or so at 96k samples/sec would
be enough. Hopefully sample rate errors wont be a problem.
Not sure how to read a timestamp from WAV metadata - I'll
have to look that up.

Anyway, no rush. I probably wont have time to do anything
with it until Friday.
--
Paul Nicholson
--


     =20

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<html><head><style type=3D"text/css"><!-- DIV {margin:0px;} --></style></h=
ead><body><div style=3D"font-family:arial, helvetica, sans-serif;font-size=
:10pt"><DIV style=3D"FONT-FAMILY: arial, helvetica, sans-serif; FONT-SIZE:=
 10pt">
<DIV>Hello Paul, VLF,</DIV>
<DIV>&nbsp;</DIV>
<DIV>please found at following link:</DIV>
<DIV>&nbsp;</DIV>
<DIV><A href=3D"http://www.megaupload.com/?d=3DMK0SVI5O" target=3D_blank><=
SPAN id=3Dlw_1297347733_2 class=3Dyshortcuts><FONT color=3D#800080>http://=
www.megaupload.com/?d=3DMK0SVI5O</FONT></SPAN></A></DIV>
<DIV>&nbsp;</DIV>
<DIV>a 1MB WAV file containing about 5 seconds of the signal out from my=
 simple antenna system (small loop, pre-amp, transformer, <SPAN id=3Dlw_12=
97347733_3 class=3Dyshortcuts>sound card</SPAN>) sitting on my balcony. It=
 was recorded with the audio settings of SpecLab configured for 96 Ksample=
s/s and 24 bits/sample.</DIV>
<DIV>&nbsp;</DIV>
<DIV>The 26 KHz signal was not present, but TBB, DHO38, NAA were.</DIV>
<DIV>&nbsp;</DIV>
<DIV>The recording was started at 13:54:00 UTC.</DIV>
<DIV>&nbsp;</DIV>
<DIV>Best regards</DIV>
<DIV>Daniele</DIV>
<DIV>&nbsp;</DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=3DTahoma>----- Forwarded Message ----<BR><B><SPAN style=3D=
"FONT-WEIGHT: bold">From:</SPAN></B> Paul &lt;paul@abelian.netcom.co.uk&gt=
;<BR><B><SPAN style=3D"FONT-WEIGHT: bold">To:</SPAN></B> <SPAN style=3D"BO=
RDER-BOTTOM: #366388 2px dotted; CURSOR: hand" id=3Dlw_1297347733_4 class=
=3Dyshortcuts>VLF_Group@yahoogroups.com</SPAN><BR><B><SPAN style=3D"FONT-W=
EIGHT: bold">Sent:</SPAN></B> Wed, February 9, 2011 12:40:16 PM<BR><B><SPA=
N style=3D"FONT-WEIGHT: bold">Subject:</SPAN></B> Re: [VLF_Group] Re: Tran=
smission on 26.0 KHz<BR><BR></FONT><SPAN style=3D"DISPLAY: none">&nbsp;</S=
PAN><!--~-|**|PrettyHtmlStartT|**|-~-->=20
<DIV id=3Dygrp-mlmsg>
<DIV id=3Dygrp-msg><!--~-|**|PrettyHtmlEndT|**|-~-->
<DIV id=3Dygrp-text>
<P><BR>Daniele wrote:<BR>&gt; I could try to record something tomorrow,<BR=
>&gt; if it can be of some help.<BR><BR>Yes, that would be useful. To begi=
n with, it doesn't<BR>matter if 26kHz isn't transmitting - we just need Ba=
fa<BR>to be on the air so that we can see if cross-correlation<BR>is possi=
ble and how sharp it is. If that works, I<BR>can try to locate DHO or NAA=
 as a test..<BR><BR>&gt; I assume that recording the input stream in WAV<B=
R>&gt; format from inside SpecLab is OK.<BR><BR>That would be ideal.<BR><B=
R>I guess just five seconds or so at 96k samples/sec would<BR>be enough.=
 Hopefully sample rate errors wont be a problem.<BR>Not sure how to read=
 a timestamp from WAV metadata - I'll<BR>have to look that up.<BR><BR>Anyw=
ay, no rush. I probably wont have time to do anything<BR>with it until Fri=
day.<BR>--<BR><SPAN style=3D"BORDER-BOTTOM: #366388 2px dotted; CURSOR: ha=
nd" id=3Dlw_1297347733_5 class=3Dyshortcuts>Paul
 Nicholson</SPAN><BR>--<BR><BR></P></DIV></DIV></DIV></DIV></DIV>
<P><BR><BR>&nbsp;</P></div><br>

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