Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by klubnl.pl (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id vBALarWm022736 for ; Sun, 10 Dec 2017 22:36:54 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1eO9DX-0005SJ-Ai for rs_out_1@blacksheep.org; Sun, 10 Dec 2017 21:32:59 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1eO9DW-0005SA-VN for rsgb_lf_group@blacksheep.org; Sun, 10 Dec 2017 21:32:58 +0000 Received: from mail-it0-x22a.google.com ([2607:f8b0:4001:c0b::22a]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1eO9DT-0000vV-Mv for rsgb_lf_group@blacksheep.org; Sun, 10 Dec 2017 21:32:57 +0000 Received: by mail-it0-x22a.google.com with SMTP id m11so10139837iti.1 for ; Sun, 10 Dec 2017 13:32:55 -0800 (PST) X-DKIM-Result: Domain=gmail.com Result=Good and Known Domain DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to; bh=gG7Pbf8+9eILrXOxrvpWwTeS8940q1K2itMiDB7tg0I=; b=ReiPU9nUTwwJHeTruGKqFC1h45DjCa/S+3RhI0XKVpuHtnLA4/JhFAJe7GMvELEGXS jxHMJSDwfrBdI34NwQY7cuS13Q4X4rezykILunhYn0vxLKAND++eNoYKly18ovEbPmIb Vzo277aFXYd8fRf1cLtoj4DkEHqx+r429bamqk0jj6L76+f3llYVvOK4FYhgwzgydRNr XJQskrsAH25ilXtGiclcQqcz4h9WqOONJm61/EOs5H70jEhW/RIsjB2mDgZvDFS5sXML FVFljktVppx60ODHcUJJYOtQ1iQzjOQcfpedxzx5tJafFR1T71AdnauDl+LdSIxRaFx2 32fg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to; bh=gG7Pbf8+9eILrXOxrvpWwTeS8940q1K2itMiDB7tg0I=; b=HyESWxj6MPQ7PhAJb+oKGYU70vXqqaNP7I1nMX55fQxFn2+bx2mrharfBda3SvClDF 6GxllTOob+2e/UZ5Oj3Hyz42af0SXQUjsocqBlFBcTCn2qIgac4kXy2tmX3aRe1ErYvR d7GzHIYO3CC8I4ov2fuUpqpPCnVnvXDKbFhSXJ+FYf9++EOstfsj6ihnvbZrL8GhPrcw HgkM/6ZJoF1YLW0iZc5jOjgCHJjjs1qDkYF5gyoNkY8WO/0RuOMiFyIJHX9dWQIoc8Sb 7zRt+dTjuQ66tBB0bF1ZYe+9BAk77hzwu3atldUloCCsi6nCeNpkIivJhYqs78ApIYYP vUdg== X-Gm-Message-State: AJaThX4HjRNcTosJeUuvimCWSvEfXpJCeKlo3CS+MmjC8X8T6N83duFU jfN6rbvDS4z//T8noxqmtPe9hzmSCLstVsl5Snc= X-Google-Smtp-Source: AGs4zMYdyPWYToBhZvCrRwVU0Ihr1qQM4sXXon6cPH5eVWy24203QROVuaFFTGwIhg2IdIJ5WRGDNsO+x+gpKQRqP4Y= X-Received: by 10.107.9.223 with SMTP id 92mr50035573ioj.16.1512941573975; Sun, 10 Dec 2017 13:32:53 -0800 (PST) MIME-Version: 1.0 Received: by 10.2.53.77 with HTTP; Sun, 10 Dec 2017 13:32:53 -0800 (PST) In-Reply-To: <160423eabe4-171a-d35c@webjas-vaa114.srv.aolmail.net> References: <2dbcd2a8-0109-41e4-c0ca-aada17f54de8@abelian.org> <160423eabe4-171a-d35c@webjas-vaa114.srv.aolmail.net> From: Dexter McIntyre W4DEX Date: Sun, 10 Dec 2017 16:32:53 -0500 Message-ID: To: rsgb_lf_group@blacksheep.org X-Spam-Score: 0.0 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Nice! I'm impressed by Stefan's determination, Mike's effort to build and maintain a superb VLF receiver and Paul's weak signal detection work. Dex On Sun, Dec 10, 2017 at 4:04 PM, Markus Vester wrote: [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (dexter.mc[at]gmail.com) 0.0 HTML_MESSAGE BODY: HTML included in message 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: f45514038df04b1035abb1d5446da941 Subject: Re: VLF: Transatlantic success East to West Content-Type: multipart/alternative; boundary="001a113eca341532c60560032923" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.5 required=5.0 tests=HTML_20_30,HTML_MESSAGE, MAILTO_TO_SPAM_ADDR autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false --001a113eca341532c60560032923 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Nice! I'm impressed by Stefan's determination, Mike's effort to build and maintain a superb VLF receiver and Paul's weak signal detection work. Dex On Sun, Dec 10, 2017 at 4:04 PM, Markus Vester wrote= : > Congratulations, great work by Mike, Stefan and Paul! I'm glad to see thi= s > happen. > > Best 73, > Markus > > PS: Secretly in my heart I'm hoping that one fine day we might receive a > 17 kHz amateur allocation... > > > -----Urspr=C3=BCngliche Mitteilung----- > Von: Paul Nicholson > An: rsgb_lf_group > Cc: Michael Smith > Verschickt: So, 10. Dez 2017 16:26 > Betreff: VLF: Transatlantic success East to West > > > Stefan wrote: > > > f =3D 17470.1000 Hz > > Start time: 07.Dec.2017 21:30:00 UTC > > Symbol period: 60 s > > Characters: 1 > > CRC bits: 10 > > Coding 16K21A > > and > > > I transmitted the message last night again [9th] > > A good signal at Forest, VA, from the overnight transmission > 9th/10th, via Mike Smith's VLF receiver at 37.35348N,79.19450W, > near Lynchburg. > > Decoded 'T' with Eb/N0 =3D +1.5 dB, BER 42.5%, rank 9; > > S/N was -36.29 dB in 1Hz; > > Reference phase 120,135,120,135; > > Congratulations to Stefan DK7FC and Mike KE4RJQ for the > first VLF east-to-west transatlantic message. Distance > is 6817.7 km. > > This is a most significant achievement. East to west is some > 20dB harder than the other direction! > > You can run the decode yourself from the 'vt' file at > > http://abelian.org/vlf/dk7fc.171209f4.vt > > The file is 4.2 Mbyte, 2 I/Q sample pairs/second. > It was extracted from Mike's raw recording with > > vtread -T2017-12-09_21:30,+34590 /data/raw-fb | > vtfilter -h bp,f=3D17470,w=3D3000 -h bs,f=3D16400,w=3D600 -h bs,f=3D18300= ,w=3D800 | > vtblank -a13 -d0 -t100 -v | vtmult -f 17470.1 | > vtresample -r480 | > vtresample -r2 > dk7fc.171209f4.vt > > Decode with: > > vtraw -oa dk7fc.171209f4.vt | > ebnaut -dp16K21A -r2 -S60 -k10 -N1 -PS15 -L800 -v -c8 -a50 > > This was a clean decode with no false detects to get in the > way. The signal is extremely weak but gives an unambiguous > decode. > > Please CC Mike in any replies, as he is not on the RSGB > mailing list. > > -- > Paul Nicholson > -- > > > --=20 "Remember what the dormouse said......." --001a113eca341532c60560032923 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Nice!=C2=A0 I'm impressed by Stefan's determinatio= n, Mike's effort to build and maintain a superb VLF receiver and Paul&#= 39;s weak signal detection work.

Dex

On Sun, Dec 10, 2017 at 4= :04 PM, Markus Vester <markusvester@aol.com> wrote:
Congratulations, great work by Mik= e, Stefan and Paul! I'm glad to see this happen.

Best 73,
Mar= kus

PS: Secretly in my heart I'm hoping that one fine day we mig= ht receive a 17 kHz amateur allocation...


-----Urspr=C3=BCnglich= e Mitteilung-----
Von: Paul Nicholson <vlf0403@abelian.org>
An: rsgb_lf_grou= p <rsg= b_lf_group@blacksheep.org>
Cc: Michael Smith <mike@unixnut.net>
Verschick= t: So, 10. Dez 2017 16:26
Betreff: VLF: Transatlantic success East to We= st


Stefan wrote:

> f =3D 17470.1000 Hz
>= Start time: 07.Dec.2017 21:30:00 UTC
> Symbol period: 60 s
>= ; Characters: 1
> CRC bits: 10
> Coding 16K21A

and
=
> I transmitted the message last night again [9th]

A good si= gnal at Forest, VA, from the overnight transmission
9th/10th, via Mike S= mith's VLF receiver at 37.35348N,79.19450W,
near Lynchburg.

D= ecoded 'T' with Eb/N0 =3D +1.5 dB, BER 42.5%, rank 9;

S/N wa= s -36.29 dB in 1Hz;

Reference phase 120,135,120,135;

Congratu= lations to Stefan DK7FC and Mike KE4RJQ for the
first VLF east-to-west t= ransatlantic message. Distance
is 6817.7 km.

This is a most sign= ificant achievement. East to west is some
20dB harder than the other dir= ection!

You can run the decode yourself from the 'vt' file a= t

http://abelian.org/vlf/dk7fc.171209f4.vt

The file is= 4.2 Mbyte, 2 I/Q sample pairs/second.
It was extracted from Mike's = raw recording with

vtread -T2017-12-09_21:30,+34590 /data/raw-fb |=
vtfilter -h bp,f=3D17470,w=3D3000 -h bs,f=3D16400,w=3D600 -h bs,f= =3D18300,w=3D800 |
vtblank -a13 -d0 -t100 -v | vtmult -f 17470.1 |<= br> vtresample -r480 |
vtresample -r2 > dk7fc.171209f4.vt
Decode with:

vtraw -oa dk7fc.171209f4.vt |
ebnaut -dp= 16K21A -r2 -S60 -k10 -N1 -PS15 -L800 -v -c8 -a50

This was a clean de= code with no false detects to get in the
way. The signal is extremely w= eak but gives an unambiguous
decode.

Please CC Mike in any replie= s, as he is not on the RSGB
mailing list.

--
Paul Nicholson--





--
=
"Remember what the d= ormouse said......."
--001a113eca341532c60560032923--