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[195.171.43.25]) by mx.google.com with ESMTP id hw8si13271878wjb.154.2014.01.05.14.54.04 for ; Sun, 05 Jan 2014 14:54:04 -0800 (PST) Received-SPF: neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) client-ip=195.171.43.25; Authentication-Results: mx.google.com; spf=neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) smtp.mail=owner-rsgb_lf_group@blacksheep.org; dkim=pass header.i=@mx.aol.com Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Vzvyk-000209-BP for rs_out_1@blacksheep.org; Sun, 05 Jan 2014 22:15:30 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Vzvyj-000200-CB for rsgb_lf_group@blacksheep.org; Sun, 05 Jan 2014 22:15:29 +0000 Received: from omr-d01.mx.aol.com ([205.188.252.208]) by relay1.thorcom.net with esmtps (TLSv1:AES256-SHA:256) (Exim 4.77) (envelope-from ) id 1Vzvyg-0004Jb-Hz for rsgb_lf_group@blacksheep.org; Sun, 05 Jan 2014 22:15:28 +0000 Received: from mtaout-mcc01.mx.aol.com (mtaout-mcc01.mx.aol.com [172.26.253.77]) by omr-d01.mx.aol.com (Outbound Mail Relay) with ESMTP id 4C8B3700567C6; Sun, 5 Jan 2014 17:15:23 -0500 (EST) Received: from White (95-91-238-155-dynip.superkabel.de [95.91.238.155]) by mtaout-mcc01.mx.aol.com (MUA/Third Party Client Interface) with ESMTPA id 4C39F380000BE; Sun, 5 Jan 2014 17:15:20 -0500 (EST) Message-ID: <4D3D3F8DEB844195AA057E71DA064D78@White> From: "Markus Vester" To: Cc: "Paul" Date: Sun, 5 Jan 2014 23:15:13 +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=20121107; t=1388960123; bh=WJZipuKW4eupaP8VdR62B9QnbVvemdsr2tySgAjrS0I=; h=From:To:Subject:Message-ID:Date:MIME-Version:Content-Type; b=kI7gg5xnXTYg4WBFMgbhpOZMtGk1ksJwmeRx+8k7q6frqI8TUEsi3pbSgdhsmLxUL znapKdy0f8FrXyeqKu1NnmDXhP5dek6+mdoUm1peQ36Vkh7pdeaCHPYDdKaaWxKvzu 4KrhrriUMxya4j+pKZR/rfVTa1g86b1TGTnml2o0= x-aol-sid: 3039ac1afd4d52c9d978286c X-AOL-IP: 95.91.238.155 X-Spam-Score: -0.1 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Most who are interested in VLF will be aware of the excellent work of Paul Nicholson, who is running a very sensitive dual-loop receiver for VLF and natural radio in Todmorden UK. He is also actively interested in monitoring man-made VLF signals, and has provided outstanding reception reports on several low-power transmit experiments. [...] Content analysis details: (-0.1 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [205.188.252.208 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (markusvester[at]aol.com) -0.0 SPF_PASS SPF: sender matches SPF record -0.1 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 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: 64bc660a83b79b15f4c44d2b2147e02d Subject: VLF: Opds-4H detections in Todmorden Content-Type: multipart/alternative; boundary="----=_NextPart_000_0009_01CF0A6B.FC9D0100" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.6 required=5.0 tests=HTML_20_30,HTML_MESSAGE, MISSING_OUTLOOK_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 Dies ist eine mehrteilige Nachricht im MIME-Format. ------=_NextPart_000_0009_01CF0A6B.FC9D0100 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Most who are interested in VLF will be aware of the excellent work of = Paul Nicholson, who is running a very sensitive dual-loop receiver for = VLF and natural radio in Todmorden UK. He is also actively interested in = monitoring man-made VLF signals, and has provided outstanding reception = reports on several low-power transmit experiments. With the recent upsurge of trying to put Opera mode to work at VLF, Paul = has kindly provided spectrum data during announced Opera-4H = transmissions from DJ8WX and myself. In Todmorden, signals from the two = loops are continuously being digitized along with GPS time stamps. The = loops were combined in software for maximum SNR from the expected = direction, and noise blanking was applied. Then relevant five-hour = chunks were Fourier transformed (0.12 Hz around 8970 Hz, 54.936 =B5Hz = bin width) and emailed to me. Here the files were fed to unmodified Opds = correlation software, using a search list containing nine callsigns from = potential VLF transmit stations = http://dl.dropboxusercontent.com/u/26404526/callsloc_vlf.txt. This = process has resulted in four unambiguous hits: Receiver: Paul Nicholson IO83XQ Opds-4H 8969.94 - 8972.06 Hz date time call distance frequency bandwidth snr = correlation 2014-01-02 06:14:01 DJ8WX 760km 8969.997Hz 0mHz -54.1dBOp 100% = 17.2dB 2014-01-02 01:50:49 DJ8WX 760km 8969.997Hz 0mHz -55.0dBOp 100% = 18.0dB 2014-01-01 16:36:38 DJ8WX 760km 8969.990Hz 0mHz -53.6dBOp 100% = 16.4dB 2014-01-01 14:22:32 DF6NM 1026km 8970.000Hz 0mHz -59.1dBOp 100% = 16.3dB For comparison, my first two Op-4H transmissions on Dec 31st had been = successfully detected by Stefan in Heidelberg, but have not produced = sufficient SNR in Todmorden at the time. Receiver: DK7FC JN49IK VLF OPDS-4H correlation Range: 8969.87 ... = 8970.23 Hz date time call distance frequency bandwidth snr = correlation 2013-12-31 22:30:04 DF6NM 175km 8970.000Hz 0mHz -60.3dBOp 82% = 14.2dB 2013-12-31 18:07:58 DF6NM 175km 8970.000Hz 0mHz -58.3dBOp 100% = 17.0dB Today we were able to also extract transmissions on Uwe's new frequency = 8270 Hz, although the SNR seemed not as good as before: Receiver: Paul Nicholson IO83XQ Opds-4H 8269.94 - 8272.06 Hz date time call distance frequency bandwidth snr = correlation 2014-01-05 07:18:54 DJ8WX 760km 8270.000Hz 0mHz -57.2dBOp 97% = 15.1dB 2014-01-05 02:55:38 DJ8WX 760km 8270.000Hz 0mHz -56.1dBOp 100% = 14.4dB 2014-01-04 22:32:14 DJ8WX 760km 8270.000Hz 0mHz -57.6dBOp 100% = 12.8dB Currently Uwe has another transmission ongoing, and the carrier is = visible on Paul's spectrogram = http://abelian.org/vlf/fbins2.shtml#b=3D080&s=3Dsp =20 Many thanks to Paul, Uwe, Stefan, and all who have contributed to this = fine success! Best 73, Markus (DF6NM) ------=_NextPart_000_0009_01CF0A6B.FC9D0100 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Most who are interested in VLF will be = aware of the=20 excellent work of Paul Nicholson, who is running a very sensitive = dual-loop=20 receiver for VLF and natural radio in Todmorden UK. He is also actively=20 interested in monitoring man-made VLF signals, and has provided = outstanding=20 reception reports on several low-power transmit = experiments.
 
With the recent upsurge of trying to = put Opera mode=20 to work at VLF, Paul has kindly provided spectrum data during announced = Opera-4H=20 transmissions from DJ8WX and myself. In Todmorden, signals from the two = loops=20 are continuously being digitized along with GPS time stamps. The loops = were=20 combined in software for maximum SNR from the expected direction, and = noise=20 blanking was applied. Then relevant five-hour chunks were Fourier = transformed=20 (0.12 Hz around 8970 Hz, 54.936 =B5Hz bin width) and emailed to me. Here = the files=20 were fed to unmodified Opds correlation software, using a search list = containing=20 nine callsigns from potential VLF transmit stations htt= p://dl.dropboxusercontent.com/u/26404526/callsloc_vlf.txt.=20 This process has resulted in four unambiguous hits:
 
Receiver: Paul Nicholson  = IO83XQ  =20 Opds-4H   8969.94 - 8972.06 Hz
  =20 date      time   call  =20 distance  frequency bandwidth  snr   =20 correlation
2014-01-02 06:14:01 DJ8WX    = 760km  =20 8969.997Hz   0mHz -54.1dBOp 100% 17.2dB
2014-01-02 01:50:49 = DJ8WX    760km   8969.997Hz   0mHz = -55.0dBOp=20 100% 18.0dB
2014-01-01 16:36:38 DJ8WX    = 760km  =20 8969.990Hz   0mHz -53.6dBOp 100% 16.4dB
2014-01-01 14:22:32 = DF6NM   1026km   8970.000Hz   0mHz = -59.1dBOp 100%=20 16.3dB
 
For comparison, my first two Op-4H = transmissions on=20 Dec 31st had been successfully detected by Stefan in Heidelberg, but = have not=20 produced sufficient SNR in Todmorden at the time.
 
Receiver: DK7FC JN49IK VLF OPDS-4H=20 correlation  Range: 8969.87 ... 8970.23 Hz
  =20 date      time   call  =20 distance  frequency bandwidth  snr   =20 correlation
2013-12-31 22:30:04 DF6NM    = 175km  =20 8970.000Hz   0mHz -60.3dBOp  82% 14.2dB
2013-12-31 = 18:07:58=20 DF6NM    175km   8970.000Hz   0mHz = -58.3dBOp=20 100% 17.0dB
 
Today we were able to also extract = transmissions on=20 Uwe's new frequency 8270 Hz, although the SNR seemed not as good as=20 before:
 
Receiver: Paul Nicholson  = IO83XQ  =20 Opds-4H   8269.94 - 8272.06 Hz
  =20 date      time   call  =20 distance  frequency bandwidth  snr   =20 correlation
2014-01-05 07:18:54 DJ8WX    = 760km  =20 8270.000Hz   0mHz -57.2dBOp  97% 15.1dB
2014-01-05 = 02:55:38=20 DJ8WX    760km   8270.000Hz   0mHz = -56.1dBOp=20 100% 14.4dB
2014-01-04 22:32:14 DJ8WX    = 760km  =20 8270.000Hz   0mHz -57.6dBOp 100% 12.8dB
 
Currently Uwe has another transmission = ongoing, and=20 the carrier is visible on Paul's spectrogram http://ab= elian.org/vlf/fbins2.shtml#b=3D080&s=3Dsp
 
Many=20 thanks to Paul, Uwe, Stefan, and all who have contributed to this fine=20 success!
 
Best 73,
Markus=20 (DF6NM)
 
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