Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, HTML_MESSAGE,RCVD_IN_DNSWL_MED,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 X-Spam-DCC: : mailn 1480; 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+deb8u1) with ESMTP id v41CwG37002729 for ; Mon, 1 May 2017 14:58:17 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1d5Aqa-0003AM-4F for rs_out_1@blacksheep.org; Mon, 01 May 2017 13:54:36 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1d5AqZ-0003AC-QB for rsgb_lf_group@blacksheep.org; Mon, 01 May 2017 13:54:35 +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 1d5AqV-0005BH-MT for rsgb_lf_group@blacksheep.org; Mon, 01 May 2017 13:54:34 +0100 Received: from submission (posteo.de [89.146.220.130]) by mout02.posteo.de (Postfix) with ESMTPS id 2FFBC20AF5 for ; Mon, 1 May 2017 14:54:31 +0200 (CEST) Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 3wGks257Qlz108t for ; Mon, 1 May 2017 14:54:30 +0200 (CEST) Message-ID: <59073006.7030901@posteo.de> Date: Mon, 01 May 2017 14:54:30 +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: <15bc05f26c9-4d33-fa96@webprd-m80.mail.aol.com> In-Reply-To: <15bc05f26c9-4d33-fa96@webprd-m80.mail.aol.com> X-Scan-Signature: 09c1a181dc7b5fd4ce37590584a561d1 Subject: Re: VLF: EbNaut 8270.0025 Hz Content-Type: multipart/alternative; boundary="------------070204050408040407060308" 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: RO X-Status: X-Keywords: X-UID: 11543 This is a multi-part message in MIME format. --------------070204050408040407060308 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Hello Markus, Am 30.04.2017 21:38, schrieb Markus Vester: > I had started the carrier at 11 UT, and have left it on after the > EbNaut sequence (hopefully until 22 UT). A very good visible signal here! I tried to decode the EbNaut message but got no decode. I had expected a decode... > As expected, the signal level is fairly constant in Amberg, but it has > been steadily increasing during the afternoon in Heidelberg, So it > looks like we are again seeing the "midday minimum" effect from > antiphase skywave. Interestingly, it appears to be more > pronounced than during Stefan's long carrier transmission on Jan > 28/29. I can think of three possible reasons: > > 1. My signal is weaker and closer to the noise, so a shallow minimum > might simply be more conspicuous, > 2. Increased solar elevation in April versus midwinter produces a > lower and sharper D-layer boundary. This would strengthen the > reflection, and the shorter delay might bring it closer to antiphase, > 3. Stefan is receiving on a loop, which should be 3 dB more sensitive > to 45° skywave than my E-field receive antenna. > > Best 73, > Markus The signal has been barely visible in 3.8 mHz. 73, Stefan > > > -----Ursprüngliche Mitteilung----- > Von: Markus Vester > > An: rsgb_lf_group > > Verschickt: So, 30. Apr 2017 15:48 > Betreff: VLF: EbNaut 8270.0025 Hz > > Another short EbNaut test for DL0AO: > > Frequency 8270.0025 Hz (same as preceding carrier), > 5 characters 8K19A, > 5 second symbols, > start 17-04-30 14:00:00, end 14:42:40. > > See http://df6nm.bplaced.net/dl0ao/VLFgrabber/vlfgrabber_dl0ao.htm > > Best 73, > Markus (DF6NM) > > > --------------070204050408040407060308 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit Hello Markus,

Am 30.04.2017 21:38, schrieb Markus Vester:
I had started the carrier at 11 UT, and have left it on after the EbNaut sequence (hopefully until 22 UT).

A very good visible signal here! I tried to decode the EbNaut message but got no decode. I had expected a decode...
As expected, the signal level is fairly constant in Amberg, but it has been steadily increasing during the afternoon in Heidelberg, So it looks like we are again seeing the "midday minimum" effect from antiphase skywave. Interestingly, it appears to be more pronounced than during Stefan's long carrier transmission on Jan 28/29. I can think of three possible reasons:

1. My signal is weaker and closer to the noise, so a shallow minimum might simply be more conspicuous,
2. Increased solar elevation in April versus midwinter produces a lower and sharper D-layer boundary. This would strengthen the reflection, and the shorter delay might bring it closer to antiphase,
3. Stefan is receiving on a loop, which should be 3 dB more sensitive to 45° skywave than my E-field receive antenna.

Best 73,
Markus 
The signal has been barely visible in 3.8 mHz.

73, Stefan



 
-----Ursprüngliche Mitteilung-----
Von: Markus Vester <markusvester@aol.com>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: So, 30. Apr 2017 15:48
Betreff: VLF: EbNaut 8270.0025 Hz

Another short EbNaut test for DL0AO:

Frequency 8270.0025 Hz (same as preceding carrier),
5 characters 8K19A,
5 second symbols,
start 17-04-30 14:00:00, end 14:42:40.

See http://df6nm.bplaced.net/dl0ao/VLFgrabber/vlfgrabber_dl0ao.htm

Best 73,
Markus (DF6NM)



--------------070204050408040407060308--