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[195.171.43.25]) by mx.google.com with ESMTP id ul10si16787999bkb.85.2014.01.01.04.43.11 for ; Wed, 01 Jan 2014 04:43:12 -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 1VyL7e-00085W-76 for rs_out_1@blacksheep.org; Wed, 01 Jan 2014 12:42:06 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1VyL7d-00085N-BY for rsgb_lf_group@blacksheep.org; Wed, 01 Jan 2014 12:42:05 +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 1VyL7Z-0006Cn-CT for rsgb_lf_group@blacksheep.org; Wed, 01 Jan 2014 12:42:04 +0000 Received: from mtaout-mbd01.mx.aol.com (mtaout-mbd01.mx.aol.com [172.26.252.13]) by omr-d01.mx.aol.com (Outbound Mail Relay) with ESMTP id BF82B700000B6 for ; Wed, 1 Jan 2014 07:41:58 -0500 (EST) Received: from White (95-91-238-155-dynip.superkabel.de [95.91.238.155]) by mtaout-mbd01.mx.aol.com (MUA/Third Party Client Interface) with ESMTPA id D209238000096 for ; Wed, 1 Jan 2014 07:41:55 -0500 (EST) Message-ID: <2BF00AB300944A50950C33618CEAC9F6@White> From: "Markus Vester" To: References: <0584ED6FDC6C44BBBF0B20AE85930809@White> <088101cf065b$69ef1320$3dcd3960$@de> <015101cf06d8$2a83ff70$7f8bfe50$@comcast.net> Date: Wed, 1 Jan 2014 13:41:49 +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=1388580118; bh=mjsOlOvZntXjY11Am3rXWimZBDJVg57Adk0rT7jfOsk=; h=From:To:Subject:Message-ID:Date:MIME-Version:Content-Type; b=aJ+FrkdlfHPoS/f9fT9OrzizlVmyj46crfw6HNl8E5V5Ooyv7zVoOlmhVwjIT8nX4 KHuzCZrd6f04Y4pWysFCCujIymOosHiXMGCRVZBDtYPpTi0O9LV/PQEBxYiUkzdCuk RBDSIWxUXa6PPPPF89RssgqpOhCVoPUrYIjnH7nU= x-aol-sid: 3039ac1afc0d52c40d137904 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: Thanks Jim for the positive comments! The SNR measured by opds was -58.3 dB on the Opera average power scale, equivalent to -54.3 dB carrier power ("PEP") in 2.5 kHz. This would scale to -20.3 dB in 1 Hz or +21.7 dB in 64 µHz (inverse of Op-4H sequence duration). Please note that the SNR measurement in opds is not completely robust and could be pessimistic by a couple of dB. The last figure 17.0 dB is for the SNR (peak-to-average power) of the time-domain cross-correlation between the waveform and the callsign template, stating the significance of the identification. In theory the correlation result should be 6 dB below the PEP SNR, but it saturates at about 22 dB for strong signals. [...] 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: 57c46fc57df9e768804caa43485df2f4 Subject: Re: VLF: 8970 Hz Op-4H Content-Type: multipart/alternative; boundary="----=_NextPart_000_000E_01CF06F7.38E56440" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.3 required=5.0 tests=HTML_50_60,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_000E_01CF06F7.38E56440 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Thanks Jim for the positive comments! The SNR measured by opds was -58.3 dB on the Opera average power scale, = equivalent to -54.3 dB carrier power ("PEP") in 2.5 kHz. This would = scale to -20.3 dB in 1 Hz or +21.7 dB in 64 =B5Hz (inverse of Op-4H = sequence duration). Please note that the SNR measurement in opds is not = completely robust and could be pessimistic by a couple of dB. The last = figure 17.0 dB is for the SNR (peak-to-average power) of the time-domain = cross-correlation between the waveform and the callsign template, = stating the significance of the identification. In theory the = correlation result should be 6 dB below the PEP SNR, but it saturates at = about 22 dB for strong signals.=20 Stefan also managed to detect my second run last night: 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 The catch between Stefan and myself is that for the ~ 180 km distance, = on 9 kHz there is normally a midday minimum due to skywave-groundwave = cancellation, so the lowest noise coincides with a low signal level. On = the other hand, OK2BVG at ~ 400 km gets both high signal and low noise = at noon. Looking at Lubos' grabber, the modulation sidebands are weakly = visible in the "6000" window, and it might even be possible to detect = one another using opds-32!=20 Anyhow I have now started a third Op-4H sequence at 9:55 today, which = should end around 14:16. Let's see what comes out... Happy new year to all in the group, 73, Markus From: hvanesce=20 Sent: Wednesday, January 01, 2014 10:58 AM To: rsgb_lf_group@blacksheep.org=20 Subject: RE: VLF: 8970 Hz Op-4H Congrats Markus and Stefan! Great news, well done. =20 Am I interpreting correctly in the following? 17dB SNR with FFT bin width of ~ 69uHz, from ~~20uW ERP (9 meter = antenna) at 175km? =20 I will be celebrating VLF Opera tonight. =20 Happy New Year, =20 Jim AA5BW =20 From: owner-rsgb_lf_group@blacksheep.org = [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Joe Sent: Tuesday, December 31, 2013 12:06 PM To: rsgb_lf_group@blacksheep.org Subject: AW: VLF: 8970 Hz Op-4H =20 Hi Markus, Stefan, =20 congrats to you, well done! =20 73 Joe =20 =20 Von: owner-rsgb_lf_group@blacksheep.org = [mailto:owner-rsgb_lf_group@blacksheep.org] Im Auftrag von Markus Vester Gesendet: Dienstag, 31. Dezember 2013 19:15 An: rsgb_lf_group@blacksheep.org Cc: Paul Betreff: Re: VLF: 8970 Hz Op-4H =20 Stefan, we made it ;-)) =20 DK7FC JN49IK VLF OPDS-4H correlation Range: 8969.87 ... 8970.23 Hz date time call distance frequency bandwidth snr = correlation 2013-12-31 18:07:58 DF6NM 175km 8970.000Hz 0mHz -58.3dBOp 100% = 17.0dB Wishing you all a very good start into 2014! =20 73, Markus (DF6NM) =20 From: Markus Vester=20 Sent: Tuesday, December 31, 2013 3:17 PM To: rsgb_lf_group@blacksheep.org=20 Cc: Paul=20 Subject: VLF: 8970 Hz Op-4H =20 This morning I have reconnected the VLF amplifier and coil to the = antenna, and started to transmit on 8970.000 Hz (Rb controlled). Sent a = more or less uninterrupted carrier between 12:30 and 13:30, and have = started an Opera-4H sequence at 13:41.=20 =20 With 0.33 amps up to 9 m my estimated ERP would be around 20 uW. The = carrier seems to be well visible on the OK2BVG grabber (up to 10 dB in = "600"). I'm now trying to reach opds-4H at DK7FC but the SNR (10 dB for = the carrier in "6000") may be just a bit marginal. =20 =20 Best 73, Markus (DF6NM) =20 ------=_NextPart_000_000E_01CF06F7.38E56440 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Thanks Jim for the positive = comments!
 
The SNR measured by opds was -58.3 = dB on the=20 Opera average power scale, equivalent to -54.3 dB carrier power = ("PEP") in=20 2.5 kHz. This would scale to -20.3 dB in 1 Hz or +21.7 dB in 64 = =B5Hz=20 (inverse of Op-4H sequence duration). Please note that the SNR = measurement in=20 opds is not completely robust and could be pessimistic by a couple = of dB.=20 The last figure 17.0 dB is for the SNR (peak-to-average = power) of the=20 time-domain cross-correlation between the waveform and the = callsign=20 template, stating the significance of the identification. In theory the=20 correlation result should be 6 dB below the PEP SNR, but it saturates at = about=20 22 dB for strong signals.
 
Stefan also managed to detect my second = run last=20 night:
 
DK7FC JN49IK VLF OPDS-4H=20 correlation     Range: 8969.87 ... 8970.23=20 Hz
   date      time  =20 call   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
 
The catch between Stefan and myself = is that=20 for the ~ 180 km distance, on 9 kHz there is=20 normally a midday minimum due to skywave-groundwave = cancellation, so the=20 lowest noise coincides with a low signal level. On the other hand, = OK2BVG=20 at ~ 400 km gets both high signal and low noise at noon. Looking at = Lubos'=20 grabber, the modulation sidebands are weakly visible in the "6000" = window,=20 and it might even be possible to detect one another=20 using opds-32! 
 
Anyhow I have now started a = third Op-4H=20 sequence at 9:55 today, which should end around = 14:16. Let's see what comes = out...
 
Happy new year to all in the group,
 
73, = Markus

From: hvanesce
Sent: Wednesday, January 01, 2014 10:58 AM
Subject: RE: VLF: 8970 Hz Op-4H

Congrats=20 Markus and Stefan!

Great=20 news, well done.

 

Am=20 I interpreting correctly in the following?

17dB=20 SNR with FFT bin width of ~ 69uHz, from ~~20uW ERP (9 meter antenna) at=20 175km?

 

I=20 will be celebrating VLF Opera tonight.

 

Happy=20 New Year,

 

Jim=20 AA5BW

 

From: owner-rsgb_lf_group@bl= acksheep.org=20 [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of=20 Joe
Sent: Tuesday, December 31, 2013 12:06 = PM
To:=20 rsgb_lf_group@blacksheep.org
Subject: AW: VLF: 8970 Hz=20 Op-4H

 

Hi Markus, Stefan,

 

congrats to you, well done!

 

73 Joe

 

 

Von: = owner-rsgb_lf_group@bl= acksheep.org=20 [mailto:owner-rsgb_lf_g= roup@blacksheep.org]=20 Im Auftrag von Markus Vester
Gesendet: Dienstag, 31. = Dezember=20 2013 19:15
An: rsgb_lf_group@blacksheep.org=
Cc:=20 Paul
Betreff: Re: VLF: 8970 Hz = Op-4H

 

Stefan, we=20 made it ;-))

 

DK7FC JN49IK=20 VLF OPDS-4H correlation     Range: 8969.87 ... = 8970.23=20 Hz
   date      time  =20 call   distance  frequency bandwidth  = snr   =20 correlation
2013-12-31 18:07:58 DF6NM    = 175km  =20 8970.000Hz   0mHz -58.3dBOp 100% = 17.0dB

Wishing you=20 all a very good start into 2014!

 

73, Markus=20 (DF6NM)

 

From: = Markus = Vester=20

Sent: = Tuesday,=20 December 31, 2013 3:17 PM

To: = rsgb_lf_group@blacksheep.org= =20

Cc: = Paul=20

Subject: = VLF: 8970=20 Hz Op-4H

 

This morning=20 I have reconnected the VLF amplifier and coil to the antenna, and = started=20 to transmit on 8970.000 Hz (Rb controlled). Sent a more or = less=20 uninterrupted carrier between 12:30 and 13:30, and have started an = Opera-4H=20 sequence at 13:41.

 

With 0.33=20 amps up to 9 m my estimated ERP would be around 20 uW. The carrier = seems to=20 be well visible on the OK2BVG grabber (up to 10 dB in "600").=20 I'm now trying to reach opds-4H at DK7FC but the SNR (10 = dB for=20 the carrier in "6000") may be just a bit = marginal.   

 

Best=20 73,

Markus=20 (DF6NM)

 

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