Return-Path: X-Spam-DCC: paranoid 104; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-2.2 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, HTML_50_60,HTML_MESSAGE,SPF_PASS autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id u2B9OPfV007904 for ; Fri, 11 Mar 2016 10:24:25 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1aeJDq-0001Zj-ML for rs_out_1@blacksheep.org; Fri, 11 Mar 2016 09:19:02 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1aeJDq-0001Za-BH for rsgb_lf_group@blacksheep.org; Fri, 11 Mar 2016 09:19:02 +0000 Received: from omr-m011e.mx.aol.com ([204.29.186.11]) by relay1.thorcom.net with esmtps (TLSv1:DHE-RSA-AES256-SHA:256) (Exim 4.86) (envelope-from ) id 1aeJDo-0003Iw-8H for rsgb_lf_group@blacksheep.org; Fri, 11 Mar 2016 09:19:01 +0000 Received: from mtaout-mbd02.mx.aol.com (mtaout-mbd02.mx.aol.com [172.26.252.14]) by omr-m011e.mx.aol.com (Outbound Mail Relay) with ESMTP id F27A33800082 for ; Fri, 11 Mar 2016 04:18:57 -0500 (EST) Received: from White (ipbcc05f3c.dynamic.kabel-deutschland.de [188.192.95.60]) by mtaout-mbd02.mx.aol.com (MUA/Third Party Client Interface) with ESMTPA id 13E9038000086 for ; Fri, 11 Mar 2016 04:18:54 -0500 (EST) Message-ID: From: "Markus Vester" To: References: <1535fd5f329-8d8-1b1de@webprd-a80.mail.aol.com> <258C4DDB9D264AFB819843A0DCCCEDE8@White> <56E1CA0A.8050904@abelian.org> Date: Fri, 11 Mar 2016 10:18:53 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 12.0.1606 X-MimeOLE: Produced By Microsoft MimeOLE V12.0.1606 x-aol-global-disposition: G DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20150623; t=1457687937; bh=xOf2cHwBTNgzCvW6shAFe5Ulq/GrCD/lZyeAa3N/Xqw=; h=From:To:Subject:Message-ID:Date:MIME-Version:Content-Type; b=YMMMB6/hXZ21QBKoNHq1ub6SV9a/cTCk8pV+9yoWMmZRpH5w6HwD7ApJn93u3AHhH 6ycV7r/Gnx732gEmwQ3vi15zkVWk/i98YZVKJZCMrfsR/vK0FZQ2DqueCKaWV0ayNq ihL8OKzOMf4zJSq4pF9AIifa2pM/do6er+JjO/rU= x-aol-sid: 3039ac1afc0e56e28d7e59b0 X-AOL-IP: 188.192.95.60 X-Scan-Signature: 9b622d5c6a961580a0f289e85f67bcca Subject: Re: VLF: EbNaut 8270.1, Thursday Mar 10 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0003_01D17B7F.69FC9900" 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 X-Scanned-By: MIMEDefang 2.56 on 10.1.3.11 Status: O X-Status: X-Keywords: X-UID: 7299 Dies ist eine mehrteilige Nachricht im MIME-Format. ------=_NextPart_000_0003_01D17B7F.69FC9900 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Thanks a lot Paul, it's good to see your reliable decodes. The carrier data is helpful, and we can see that some irregularity must = have occured before 12 UT. Interestingly my Loran-C monitor, which is = also fed by the same GPS device (an old Motorola 8-channel Oncore), lost = lock twice around that time. I may have to do further investigattions on = GPS reception reliability during VLF transmissions. I suspect the = problem might have been a combination of RF noise from occasional = partial discharges and unfavourable satellite visibility.=20 All the best, and good luck for your LF transmissions! 73, Markus (DF6NM) From: Paul Nicholson=20 Sent: Thursday, March 10, 2016 8:24 PM To: rsgb_lf_group@blacksheep.org=20 Subject: Re: VLF: EbNaut 8270.1, Thursday Mar 10 Markus wrote: > Frequency: 8270.100 Hz, > start time 09:20:02, > 5 characters, 8K19A, 16 bit CRC, 10 second symbols, > total duration 5120 seconds, > end time 10:45:22. An easy decode Eb/N0 =3D 1.7 dB, BER 34.2% and the phase pattern was -30 -30 0 0. Carrier -55.8dB in 2.5kHz after sferic blanking. > The message will be repeated 13:00:02 to 14:25:22 Decoded with Eb/N0 =3D 0.0 dB, BER 36.9%, phase -30 -30 0 0, carrier -56.2dB. > Between the two EbNaut sequences (10:45 to 13 UT), I had > sent a straight uninterrupted carrier on 8270.0025 Hz. Flux density and phase in 30 minute 555uHz averages 10:45 to 11:15 0.069 fT -70 deg 11:00 to 11:30 0.067 fT -53 deg 11:15 to 11:45 0.075 fT -71 deg 11:30 to 12:00 0.083 fT -107 deg 11:45 to 12:15 0.082 fT -115 deg 12:00 to 12:30 0.084 fT -71 deg 12:15 to 12:45 0.126 fT -65 deg 12:30 to 13:00 0.151 fT -72 deg Flux density and phase in 15 minute 1.1mHz averages 11:15 to 11:30 0.054 fT -43 deg 11:30 to 11:45 0.104 fT -87 deg 11:45 to 12:00 0.077 fT -138 deg 12:00 to 12:15 0.094 fT -95 deg 12:15 to 12:30 0.091 fT -51 deg 12:30 to 12:45 0.167 fT -71 deg 12:45 to 13:00 0.135 fT -74 deg -- Paul Nicholson, -- ------=_NextPart_000_0003_01D17B7F.69FC9900 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Thanks a lot Paul, it's good to = see your=20 reliable decodes.
 
The carrier data is helpful, and = we can see=20 that some irregularity must have occured before 12 UT. = Interestingly my=20 Loran-C monitor, which is also fed by the same GPS device (an = old=20 Motorola 8-channel Oncore), lost lock twice around that = time. I=20 may have to do further investigattions on GPS reception reliability = during VLF=20 transmissions. I suspect the problem might have been a combination = of RF=20 noise from occasional partial discharges and unfavourable satellite = visibility.=20
 
All the best, and good=20 luck for your LF transmissions!
 
73, Markus (DF6NM)
 
 

From: Paul Nicholson
Sent: Thursday, March 10, 2016 8:24 PM
Subject: Re: VLF: EbNaut 8270.1, Thursday Mar = 10

Markus=20 wrote:

 > Frequency: 8270.100 Hz,
 > start = time=20 09:20:02,
 > 5 characters, 8K19A, 16 bit CRC, 10 second=20 symbols,
 > total duration 5120 seconds,
 > end = time=20 10:45:22.

An easy decode Eb/N0 =3D 1.7 dB, BER 34.2% and the = phase=20 pattern
was -30 -30 0 0.  Carrier -55.8dB in 2.5kHz after sferic = blanking.

 >  The message will be repeated 13:00:02 = to=20 14:25:22

Decoded with Eb/N0 =3D 0.0 dB, BER 36.9%, phase -30 -30 = 0=20 0,
carrier -56.2dB.

 > Between the two EbNaut = sequences (10:45=20 to 13 UT), I had
 > sent a straight uninterrupted carrier on=20 8270.0025 Hz.

Flux density and phase in 30 minute 555uHz=20 averages

  10:45 to 11:15  0.069 fT   -70=20 deg
  11:00 to 11:30  0.067 fT   -53 = deg
  11:15=20 to 11:45  0.075 fT   -71 deg
  11:30 to = 12:00  0.083=20 fT  -107 deg
  11:45 to 12:15  0.082 fT  -115=20 deg
  12:00 to 12:30  0.084 fT   -71 = deg
  12:15=20 to 12:45  0.126 fT   -65 deg
  12:30 to = 13:00  0.151=20 fT   -72 deg

Flux density and phase in 15 minute 1.1mHz = averages

  11:15 to 11:30  0.054 fT   -43=20 deg
  11:30 to 11:45  0.104 fT   -87 = deg
  11:45=20 to 12:00  0.077 fT  -138 deg
  12:00 to 12:15  = 0.094=20 fT   -95 deg
  12:15 to 12:30  0.091 = fT   -51=20 deg
  12:30 to 12:45  0.167 fT   -71 = deg
  12:45=20 to 13:00  0.135 fT   -74 deg

--
Paul=20 Nicholson,
--

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