Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by klubnl.pl (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id x5BIjocJ030414 for ; Tue, 11 Jun 2019 20:45:51 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1haldQ-0001i1-FM for rs_out_1@blacksheep.org; Tue, 11 Jun 2019 19:36:40 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1halcb-0001hm-9a for rsgb_lf_group@blacksheep.org; Tue, 11 Jun 2019 19:35:49 +0100 Received: from sonic311-14.consmr.mail.bf2.yahoo.com ([74.6.131.124]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.92) (envelope-from ) id 1halcX-0005Ec-ST for rsgb_lf_group@blacksheep.org; Tue, 11 Jun 2019 19:35:47 +0100 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=aol.com; s=a2048; t=1560278143; bh=YlM9hNZFrSKxvUDfkq1wvJOm5G/SLXQg4PsOqW5ilzw=; h=Date:From:To:Subject:References:From:Subject; b=dlpfG7Oqd9K1AjF600ORpZCkXpf9THR99aiZ8+2mAiqG02Igm+is14GKQfJ1KTbbiph6r2X9X7tUI9wYud8yQDnYrOv0Vxvy0X4PV/Hk2MEZfA+01jneAtHkUsK6TupKcp+1VtrqEBDhg4FRJuMf3CJ7Lq7d6l7+EG1cQeDJkBJ9maAhf9zpji9hdOwv93O5GLKqBne9JB29AtQTtkP+2xZqt6cbRjTEHcHss7afdi31ZoaiUYp6QnmDowRBAp9CRMxpLZcki73YFXQOKs+bntZLFwHlKcYvjqN6IFQoQh62k8Vx9kGym4F3YhuZKspFgkJYna5/pUtqHvBXmlMiWw== X-YMail-OSG: i4nrO38VM1nxBRol3Zzf1MPxXCNrwP.Wuie8Wjl46Qi5UxQqk2X7npQ8UEgvfu1 NdnovJyn2sx5PtZ0r_A677JCvuNlWvguC_Pzr1wSOuoGqHi8ldWs4jwpKgq4qr9MrJI2CYHgrgh8 DVseZvBIsKjK5JpvOGd_vTRLYTEG9uqKk.1NDlbjq._hiuV_rp4ymj2j14C4jpN9yoJHgnH6YyIL PUrOHHCWLo_JROy2fmNU0q2ifvvNx2bi9KbmLVJ0raEG3LZ4s1tbjLe_YKLnJYPbuVZ6vjT_t17X lyKOO5CfjmRx0BLKm7oa7M.bYySCZ_cSFh9_c..NyevRaNQE.0hrx5Gwuh4hy66kihzD.lbM2Mk. TSdgL3YCiNdx5pr30Ephj9MjC5OxC24ewI73OvCx.V2fSgwDTkAJS_cfHumLufEmTel2FZgeQIE4 W6sVSjzgjhMesm4Myj6quuBcymCwy6g5eQdCC8MDp2u.O_rSvDM8W8n.QajySeqCUJnSOOMCGWHv i_FyCTjD5GGiKrso2VEQlMWOtGKRKU1IsnMzYnZCZ.URE9DrYLuRlwz74eSc8vORPC1Cwv.0pEMy gJXmYhDVo6tdrkOc3SOqiGvOCK_o7EQI_3Fbi7sX4vJvBGJt.wmEcs1G805TnqOqQd5RQz.5TGPI xMymoePFsQRtMeSBe5UzTgLOVIAiYCHBJZ4StvIN1QM8wkBswQG353NRIbnt.PxHVGCjuLCxTrHc MGlWkvXIPN5bT1ydgExVfIkzygvvXDGthN7s5LliY3IfQaUUAruXqvcJuuVOWV7BBch_N5qfUUGj qUczZZqs5FcbMeBwKQUesz7ozs9CUb3xeRG.PWoKNjR7yYIVPb2d2MVMDNBUB5pu_jAJV18IB2_T PrsSz3JmLhZlBY8NBMMpkwbchXtBQu7N4rP3yeTysOVxs6.3dDgMHGXTImCOQaAqBjlN1PCsRBZZ unSKN8lCyGIbN6Iv65y0QjZeEgioQFVAXDwzLpfRRk.kwJA9aoJgdawYfELAfH5D9N3MR.jKu5bS AWzvOhq1ykUSTN0opaMfCeeMLQmH7PxJiXoZ.vhkyuHq3RaFK2DyE34dwO9s.JegKjTMgCxNSRbp z8dDwXZf0MyVyHBUrQNZboDu7I5mccN6ZuZu0GRCjRotnvrazy91wHi993q4a3XZwbjDcYuYRCqD GOoMX Received: from sonic.gate.mail.ne1.yahoo.com by sonic311.consmr.mail.bf2.yahoo.com with HTTP; Tue, 11 Jun 2019 18:35:43 +0000 Date: Tue, 11 Jun 2019 18:35:39 +0000 (UTC) From: Markus Vester To: rsgb_lf_group@blacksheep.org Message-ID: <1940632348.1264491.1560278139392@mail.yahoo.com> MIME-Version: 1.0 References: <1940632348.1264491.1560278139392.ref@mail.yahoo.com> X-Mailer: WebService/1.1.13634 aolwebmail Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36 X-Spam-Score: -0.2 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see @@CONTACT_ADDRESS@@ for details. Content preview: Hi Stefan, no, we normally don't engage noise blanking on ELF, mostly because it would cause splatter around the strong 50 Hz line. By the way, the observed maxima don't seem to agee well with nominal [...] Content analysis details: (-0.2 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [74.6.131.124 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (markusvester[at]aol.com) 0.0 HTML_MESSAGE BODY: HTML included in message -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain X-Scan-Signature: cd16d8c2fb75309db133b7de4adb1391 Subject: Re: ELF: Schumann resonance spectrogram Content-Type: multipart/alternative; boundary="----=_Part_1264490_1696473047.1560278139391" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: ** X-Spam-Status: No, hits=2.9 required=5.0 tests=FORGED_MUA_MOZILLA,HTML_50_60, HTML_MESSAGE 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 ------=_Part_1264490_1696473047.1560278139391 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Hi Stefan, no, we normally don't engage noise blanking on ELF, mostly because it would= cause splatter around the strong 50 Hz line. By the way, the observed maxima don't seem to agee well with nominal Schuma= nn frequencies as published in Wikipedia, based on a sqrt(n*(n+1)) formula.= A simple set of equispaced frequencies (1.6+n*6.2) Hz appear to provide a = better fit.=C2=A0 Best 73,Markus -----Urspr=C3=BCngliche Mitteilung----- Von: DK7FC An: rsgb_lf_group Verschickt: Di, 11. Jun. 2019 12:26 Betreff: ELF: Schumann resonance spectrogram Hi Markus, I see you're displaying a 7th Schumann resonance on the DL0AO grabber site. Edgar pointed me to the idea to enable "show radio station list" in=20 SpecLab, which is now done. I added just 6 markers, although a 7th trace=20 is actually visible here as well, with poor SNR though. This leads me to=20 the question if a noise blanker with high peak/average (blanking only=20 strong local bursrs) threshold could be useful to improve the Schumann=20 SNR. Do you have a NB enabled there? 73, Stefan ------=_Part_1264490_1696473047.1560278139391 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Hi= Stefan,

no, we normally don't engage noise blanking on = ELF, mostly because it would cause splatter around the strong 50 Hz line.

By the way, the observed maxima don't seem to agee well with = nominal Schumann frequencies as published in Wikipedia, based on a sqrt(n*(= n+1)) formula. A simple set of equispaced frequencies (1.6+n*6.2) Hz appear= to provide a better fit. 

Best 7= 3,
Markus

-----Urspr=C3=BCngliche Mitteilung-----
Von: DK7FC <selberdenken@posteo.de>
An: rsgb= _lf_group <rsgb_lf_group@blacksheep.org>
Verschickt= : Di, 11. Jun. 2019 12:26
Betreff: ELF: Schumann resonanc= e spectrogram

H= i Markus,

I see you're displaying a 7t= h Schumann resonance on the DL0AO grabber site.
Edgar poi= nted me to the idea to enable "show radio station list" in
SpecLab, which is now done. I added just 6 markers, although a 7th trace=
is actually visible here as well, with poor SNR though.= This leads me to
the question if a noise blanker with h= igh peak/average (blanking only
strong local bursrs) thr= eshold could be useful to improve the Schumann
SNR. Do y= ou have a NB enabled there?

73, Stefan=

------=_Part_1264490_1696473047.1560278139391--