Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=0.0 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, HTML_MESSAGE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 X-Spam-DCC: EATSERVER: mailn 1166; Body=2 Fuz1=2 Fuz2=2 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by lipkowski.org (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id v7M8euVc013897 for ; Tue, 22 Aug 2017 10:40:57 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1dk4Z8-00011g-Vs for rs_out_1@blacksheep.org; Tue, 22 Aug 2017 09:29:38 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1dk4Z8-00011X-8p for rsgb_lf_group@blacksheep.org; Tue, 22 Aug 2017 09:29:38 +0100 Received: from mout02.posteo.de ([185.67.36.66]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1dk4Z4-0004Dc-4E for rsgb_lf_group@blacksheep.org; Tue, 22 Aug 2017 09:29:37 +0100 Received: from submission (posteo.de [89.146.220.130]) by mout02.posteo.de (Postfix) with ESMTPS id 69791208A7 for ; Tue, 22 Aug 2017 10:29:31 +0200 (CEST) Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 3xc3d65np6z10HW for ; Tue, 22 Aug 2017 10:29:30 +0200 (CEST) Message-ID: <599BEB67.2010204@posteo.de> Date: Tue, 22 Aug 2017 10:29:27 +0200 From: DK7FC User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <15e04c36a3d-c04-4d48@webjas-vab154.srv.aolmail.net> In-Reply-To: X-Scan-Signature: 7c7a1907d3a7d57b28660e5fb4c32107 Subject: Re: VLF: Carrier on 4470.005 Hz! Content-Type: multipart/alternative; boundary="------------030307050009040801020400" 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 2.75 Status: O X-Status: X-Keywords: X-UID: 12428 This is a multi-part message in MIME format. --------------030307050009040801020400 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Hi Paul, VLF, Am 21.08.2017 18:48, schrieb Paul Nicholson: > > > f = 4470.005000 Hz > > Start time: 22.August.2017 04:00:00 UTC > > Symbol period: 60 s > > Characters: 5 > > CRC bits: 6 > > Coding 16K21A > > With this transmission, the optimum decoder list length will > be about 40 for a full phase search, or about 120 if you > decide the phase is constant enough to restrict the search > to uniform phases. Hahaa you changed the calculator website now! ;-) I just wanted to reproduce the settings, http://abelian.org/ebnaut/calc.php?sndb=16&snbws=0.000031&snmps=&code=16K21&sp=60&crc=6&nc=5&submit=Calculate and now i saw other values and two lines describing the optimum list length more detailed. That is helpful. In my EbNaut decode attempts i used a larger list length than recommended in the past but Markus alsways seems to use 20000 which will lead to many false decodes if the optimum length would be 9 actually. This can be problematic when using 2...3 characters. All right now. Am 21.08.2017 22:15, schrieb Paul Nicholson: > > Two days stacked, 20th+21st 07:00 to 19:00. > > http://abelian.org/vlf/tmp/170821b.gif > > 12.5 dB in 23.1 uHz, a little over 4 sigma. Wow, that peak is so nice and sharp that i decided to run the carrier for another day so you can stack 3 days. *The EbNaut message will then start tomorrow 04:00:00.3 UTC.* 73, Stefan --------------030307050009040801020400 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit Hi Paul, VLF,

Am 21.08.2017 18:48, schrieb Paul Nicholson:

> f = 4470.005000 Hz
> Start time: 22.August.2017  04:00:00 UTC
> Symbol period: 60 s
> Characters: 5
> CRC bits: 6
> Coding 16K21A

With this transmission, the optimum decoder list length will
be about 40 for a full phase search, or about 120 if you
decide the phase is constant enough to restrict the search
to uniform phases.

Hahaa you changed the calculator website now! ;-) I just wanted to reproduce the settings, http://abelian.org/ebnaut/calc.php?sndb=16&snbws=0.000031&snmps=&code=16K21&sp=60&crc=6&nc=5&submit=Calculate
and now i saw other values and two lines describing the optimum list length more detailed. That is helpful.
In my EbNaut decode attempts i used a larger list length than recommended in the past but Markus alsways seems to use 20000 which will lead to many false decodes if the optimum length would be 9 actually. This can be problematic when using 2...3 characters.

All right now.

Am 21.08.2017 22:15, schrieb Paul Nicholson:

Two days stacked, 20th+21st 07:00 to 19:00.

 http://abelian.org/vlf/tmp/170821b.gif

12.5 dB in 23.1 uHz, a little over 4 sigma.

Wow, that peak is so nice and sharp that i decided to run the carrier for another day so you can stack 3 days. The EbNaut message will then start tomorrow 04:00:00.3 UTC.


73, Stefan
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