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[195.171.43.25]) by mx.google.com with ESMTP id mx7si6070705wic.37.2013.10.19.13.07.39 for ; Sat, 19 Oct 2013 13:07:39 -0700 (PDT) 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 1VXcK1-0007hV-9y for rs_out_1@blacksheep.org; Sat, 19 Oct 2013 20:36:25 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1VXcK0-0007hM-P4 for rsgb_lf_group@blacksheep.org; Sat, 19 Oct 2013 20:36:24 +0100 Received: from omr-m02.mx.aol.com ([64.12.143.76]) by relay1.thorcom.net with esmtps (TLSv1:AES256-SHA:256) (Exim 4.77) (envelope-from ) id 1VXcJw-0005sr-V4 for rsgb_lf_group@blacksheep.org; Sat, 19 Oct 2013 20:36:23 +0100 Received: from mtaout-da06.r1000.mx.aol.com (mtaout-da06.r1000.mx.aol.com [172.29.51.134]) by omr-m02.mx.aol.com (Outbound Mail Relay) with ESMTP id EAA0B70000084 for ; Sat, 19 Oct 2013 15:36:17 -0400 (EDT) Received: from White (95-91-237-85-dynip.superkabel.de [95.91.237.85]) by mtaout-da06.r1000.mx.aol.com (MUA/Third Party Client Interface) with ESMTPA id E5B2BE000099 for ; Sat, 19 Oct 2013 15:36:16 -0400 (EDT) Message-ID: <9B05FD086F7D43BCB2856D8AD6BF2485@White> From: "Markus Vester" To: References: <000701cecb29$d06ee7f0$6401a8c0@JAYDELL> <525FCC72.3080506@iup.uni-heidelberg.de> <002001cecb35$90568ea0$6d01a8c0@DELL4> <525FFA57.1020001@iup.uni-heidelberg.de> <525FFAD3.2000406@iup.uni-heidelberg.de> <005401cecb51$fb859bf0$6d01a8c0@DELL4> <52608759.1070509@iup.uni-heidelberg.de> <526090AA.20402@iup.uni-heidelberg.de> <003101cecbab$78a2e2b0$6401a8c0@JAYDELL> <52611614.7090703@charter.net> <52612B46.4020701@iup.uni-heidelberg.de> <5261B880.5090903@iup.uni-heidelberg.de> <001d01cecc56$bb771380$6401a8c0@JAYDELL> <003b01cecc5a$562ce9b0$6401a8c0@JAYDELL> <9EBF60108805460E920141D8F0B47E04@White> <000b01cecc5f$0e3421a0$6401a8c0@JAYDELL> <0E38A9ECFD4D42FC98B7C1A320D49BC9@White> <5262D9D7.2040302@charter.net> <5262D976.5030109@iup.uni-heidelberg.de> Date: Sat, 19 Oct 2013 21:36:15 +0200 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=1382211377; bh=SzqAuhj6d4S5/zGd+M3PQfsHySDNfoihvWKPBo2VckA=; h=From:To:Subject:Message-ID:Date:MIME-Version:Content-Type; b=WnCSPBoboXirqquRdCTJU4cTIWwq0Rr1y8+QKNwi/KStQ1ILzq91vX//GV6blgrYZ 3NAY348ymYugBgn1lwhiZD2QPY79aTKlCQAsZV1h7FSNsOLjh8vk+1IbraJ6JFdVOH cyPcOg+e0hdXR+3IL+IWkJBWk73OZjXjUQZoOxgo= x-aol-sid: 3039ac1d33865262df301263 X-AOL-IP: 95.91.237.85 X-Spam-Score: -0.4 (/) 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: Stefan, LF, very nice! Thanks for the link to the UA0SNV monitor. Yes if there is fading during the sequence this will widen the carrier, just like any other amplitude or phase modulation. For medium distances with multiple skywave modes, fading periods on LF could be on the order of 10 to 20 minutes, equivalent to a millihertz or two. Longer paths tend to be more stable with slower fading because the steep skywave components have died out. [...] Content analysis details: (-0.4 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [64.12.143.76 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 -0.4 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: 7c995d39cde70605aa76dd18810a4256 Subject: Re: LF: T/A OPDS Content-Type: multipart/alternative; boundary="----=_NextPart_000_0015_01CECD13.3CF1B7F0" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.9 required=5.0 tests=HTML_30_40,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 Status: O X-Status: X-Keywords: X-UID: 3016 Dies ist eine mehrteilige Nachricht im MIME-Format. ------=_NextPart_000_0015_01CECD13.3CF1B7F0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Stefan, LF, very nice! Thanks for the link to the UA0SNV monitor. Yes if there is fading during the sequence this will widen the carrier, = just like any other amplitude or phase modulation. For medium distances = with multiple skywave modes, fading periods on LF could be on the order = of 10 to 20 minutes, equivalent to a millihertz or two. Longer paths = tend to be more stable with slower fading because the steep skywave = components have died out.=20 But keep in mind that a wider peak might also have been caused by a = small receiver drift. BTW In my other posting I hadn't explained the last dB number in the = opds result line. This describes the quality of the match to the = callsign template, ie how many dBs the highest peak in the = cross-correlation function exceeds its average power, which comes from = noise and autocorrelation sidelobes. The range is from about 22 dB for a = perfect signal, down to a chosen threshold of 15 dB where false = positives start to appear occasionally. I also intend to send more Op-32 later tonight. All the best, Markus (DF6NM) From: Stefan Sch=E4fer=20 Sent: Saturday, October 19, 2013 9:11 PM To: rsgb_lf_group@blacksheep.org=20 Subject: Re: LF: T/A OPDS Markus and OPDS fans,=20 On the page of UA0SNV, = http://dl.dropboxusercontent.com/u/76751319/opds32.txt i just found this = text: UA0SNV OO18JB Opera-32 correlation = http://df6nm.bplaced.net/opera/opds.zip date time call distance frequency bandwidth snr = correlation 2013-10-19 19:00:33 DK7FC 5745km 137560.111Hz 5mHz -49.1dBOp 81% = 15.7dB 2013-10-19 18:20:32 DK7FC 5745km 137560.110Hz 5mHz -44.1dBOp 100% = 19.1dB So it also works over the land path of that distance. It appears to me that, if the transmitted coherent signal and the = receiver is stable, the x-mHz reading says something about the phase = stability of the path (?). Markus, good luck! In an hour or so i willy QSY to 472 kHz CW but will = be back at night. 73, Stefan/DK7FC ------=_NextPart_000_0015_01CECD13.3CF1B7F0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Stefan, LF,
 
very nice! Thanks for the link to the = UA0SNV=20 monitor.
 
Yes if there is fading during the = sequence this=20 will widen the carrier, just like any other amplitude or phase=20 modulation. For medium distances with multiple skywave modes, = fading=20 periods on LF could be on the order of 10 to 20=20 minutes, equivalent to a millihertz or two. Longer paths tend = to=20 be more stable with slower fading because the steep skywave = components=20 have died out.
 
But keep in mind that a wider peak = might also=20 have been caused by a small receiver drift.
 
BTW In my other posting I hadn't = explained the=20 last dB number in the opds result line. This describes the quality = of the=20 match to the callsign template, ie how many dBs the highest peak in the=20 cross-correlation function = exceeds its average power, which=20 comes from noise and autocorrelation sidelobes. The range = is from=20 about 22 dB for a perfect signal, down to a chosen threshold of 15 = dB where=20 false positives start to appear occasionally.
 
I also intend to send more Op-32 later tonight.
 
All the best,
 
Markus (DF6NM)
 
 

From: Stefan = Sch=E4fer
Sent: Saturday, October 19, 2013 9:11 PM
To: rsgb_lf_group@blacksheep.org= =20
Subject: Re: LF: T/A OPDS

Markus and OPDS fans,

On the page of = UA0SNV,=20 http://dl= .dropboxusercontent.com/u/76751319/opds32.txt=20 i just found this text:

UA0SNV OO18JB Opera-32 =
correlation     http://df6nm.bplaced.net=
/opera/opds.zip

   date      time   call   distance  frequency bandwidth  snr    =
correlation

2013-10-19 19:00:33 DK7FC   5745km 137560.111Hz   5mHz -49.1dBOp  81% =
15.7dB
2013-10-19 18:20:32 DK7FC   5745km 137560.110Hz   5mHz -44.1dBOp 100% =
19.1dB

So=20 it also works over the land path of that distance.

It appears to = me that,=20 if the transmitted coherent signal and the receiver is stable, the x-mHz = reading=20 says something about the phase stability of the path (?).

Markus, = good=20 luck! In an hour or so i willy QSY to 472 kHz CW but will be back at=20 night.

73, Stefan/DK7FC
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