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 vBB7YTlh024548 for ; Mon, 11 Dec 2017 08:34:30 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1eOIQU-0006Uz-Ae for rs_out_1@blacksheep.org; Mon, 11 Dec 2017 07:22:58 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1eOIQL-0006Uq-G0 for rsgb_lf_group@blacksheep.org; Mon, 11 Dec 2017 07:22:49 +0000 Received: from resqmta-ch2-10v.sys.comcast.net ([2001:558:fe21:29:69:252:207:42]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1eOIQH-0002OR-Qn for rsgb_lf_group@blacksheep.org; Mon, 11 Dec 2017 07:22:48 +0000 Received: from resomta-ch2-14v.sys.comcast.net ([69.252.207.110]) by resqmta-ch2-10v.sys.comcast.net with ESMTP id OIQDegc0fashGOIQDehEni; Mon, 11 Dec 2017 07:22:41 +0000 X-DKIM-Result: Domain=comcast.net Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=comcast.net; s=q20161114; t=1512976961; bh=LWS8jk9mhmcUHk8YBrTCOq+BNKs2JCe5IqjfUgDlNus=; h=Received:Received:From:To:Subject:Date:Message-ID:MIME-Version: Content-Type; b=VdPEcS4i/dNIVMPIvnr7uybQZ1gwRvd13w1wciN3fNYVxN0Rio6gD3Z5rk5d4o6R1 D3obTp8zUQSId1T1JtxtgJMc1xj9RMZmrwaYuLkduwWq9n1upZBlCpXr/IdU8dqNKs snd6AUCaFC2QaKptfUAr/rswYxw4AhuHrwuRHwkMZq3m5irRZNIGqXD4QjnA8eDfHD AaEz4ofBP7tFUFHFxW3HIx907ADdEb5G/g7qc1lNF4braGuTgd7yEkMgNBOsn/nmeX iNfSRutRanJJflaLVhYE60cWVjY7MhhLpdhoY1lywEIVPVxM6xniGYXtmKt2QuIrVO x4PFCQ3gXYjHw== Received: from Owner ([IPv6:2601:140:8500:7f9f:78f6:dd:b547:d008]) by resomta-ch2-14v.sys.comcast.net with SMTP id OIQAeP1IZWk9kOIQBevidh; Mon, 11 Dec 2017 07:22:40 +0000 From: To: References: <2dbcd2a8-0109-41e4-c0ca-aada17f54de8@abelian.org> <160423eabe4-171a-d35c@webjas-vaa114.srv.aolmail.net> In-Reply-To: <160423eabe4-171a-d35c@webjas-vaa114.srv.aolmail.net> Date: Mon, 11 Dec 2017 02:22:33 -0500 Message-ID: <030701d37250$d1255030$736ff090$@comcast.net> MIME-Version: 1.0 X-Mailer: Microsoft Outlook 14.0 Thread-Index: AQF7CMWAEyghtRv4IneF01GITrQXvQIdDqPso92ipzA= Content-Language: en-us X-CMAE-Envelope: MS4wfJEQODQz8MAuBgqUMW7TyUGlVhHU3ZGkrRSoEP2AJlqWDuv2gEf18yX/aARJCHpSfetoenOJybgneVShrKR1MahwhE+xSd3OevejcRtkbu35G3Fw/In8 ZH0hqDEiKf9AaD+WYKqafqpRDjGTPjBTxXw= 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 work Mike, Stefan and Paul; a great achievement, and inspiring! Gratifying to consider recent and special efforts by all above that combined for this exceptional east-to-west result. 73, [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (hvanesce[at]comcast.net) 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: 9cafc73d135491d75f4f47d39ed43841 Subject: RE: VLF: Transatlantic success East to West Content-Type: multipart/alternative; boundary="----=_NextPart_000_0308_01D37226.E84F4830" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.8 required=5.0 tests=HTML_40_50,HTML_MESSAGE, MAILTO_TO_SPAM_ADDR,NO_REAL_NAME 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 This is a multipart message in MIME format. ------=_NextPart_000_0308_01D37226.E84F4830 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Nice work Mike, Stefan and Paul; a great achievement, and inspiring!=20 =20 Gratifying to consider recent and special efforts by all above that = combined for this exceptional east-to-west result. =20 73, =20 Jim AA5BW =20 From: owner-rsgb_lf_group@blacksheep.org = [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Markus Vester Sent: Sunday, December 10, 2017 4:05 PM To: rsgb_lf_group@blacksheep.org Subject: Re: VLF: Transatlantic success East to West =20 Congratulations, great work by Mike, Stefan and Paul! I'm glad to see = this 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-----=20 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 -- ------=_NextPart_000_0308_01D37226.E84F4830 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable

Nice work Mike, Stefan and Paul; a great achievement, and inspiring! =

 

Gratifying to consider recent and special efforts by all above that = combined for this exceptional east-to-west = result.

 

73,

 

Jim AA5BW

 

From:= = owner-rsgb_lf_group@blacksheep.org = [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Markus = Vester
Sent: Sunday, December 10, 2017 4:05 PM
To: = rsgb_lf_group@blacksheep.org
Subject: Re: VLF: Transatlantic = success East to West

 

C= ongratulations, great work by Mike, Stefan and Paul! I'm glad to see = this 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 <vlf0403@abelian.org>
An: = rsgb_lf_group <rsgb_lf_group@blacksheep.org= >
Cc: Michael Smith <mike@unixnut.net>
Verschickt: = So, 10. Dez 2017 16:26
Betreff: VLF: Transatlantic success East to = West

<= br>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
--


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