Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mg03.r1000.mx.aol.com (Internet Inbound) with ESMTP id 5DC5C3800009F; Sun, 1 Apr 2012 18:30:30 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1SETGy-0007Ub-Pr for rs_out_1@blacksheep.org; Sun, 01 Apr 2012 23:29:20 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1SETGy-0007US-42 for rsgb_lf_group@blacksheep.org; Sun, 01 Apr 2012 23:29:20 +0100 Received: from imr-ma05.mx.aol.com ([64.12.100.31]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1SETGw-0000mF-4x for rsgb_lf_group@blacksheep.org; Sun, 01 Apr 2012 23:29:20 +0100 Received: from mtaout-ma02.r1000.mx.aol.com (mtaout-ma02.r1000.mx.aol.com [172.29.41.2]) by imr-ma05.mx.aol.com (8.14.1/8.14.1) with ESMTP id q31MT56g011895 for ; Sun, 1 Apr 2012 18:29:05 -0400 Received: from White (nrbg-4dbe45d5.pool.mediaWays.net [77.190.69.213]) by mtaout-ma02.r1000.mx.aol.com (MUA/Third Party Client Interface) with ESMTPA id B4CE5E0001D5 for ; Sun, 1 Apr 2012 18:29:04 -0400 (EDT) Message-ID: <6B67CD090B5141058387779E0685816A@White> From: "Markus Vester" To: References: <8CEDDE7C797C0FB-1AAC-F23D@webmail-d101.sysops.aol.com> Date: Mon, 2 Apr 2012 00:29:03 +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 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20110426; t=1333319345; bh=V77uZx7wb2QBfPDNdcrzA59ZPo1WP4upsg+Y6KZgkUk=; h=From:To:Subject:Message-ID:Date:MIME-Version:Content-Type; b=sFZxwdh4wQbvplVcwWHlIhGKx68h+vXsNrbNHBOLzegbyTUYm1D5UR79N7wDdvnQY 8v0fsTUuXlU21aggq7j7+tnfcJW9JavRSjIJRcsIuH3bdbu94IEfA3XxF9lFGKL36z Ll0+U6RiJIB4CN/tEtjXu0QDLXfBGSYuW2AqRwYk= X-AOL-SCOLL-SCORE: 0:2:499326080:93952408 X-AOL-SCOLL-URL_COUNT: 0 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: =?utf-8?Q?Re:_ULF:_11.6_=C2=B5Hz_transmission?= Content-Type: multipart/alternative; boundary="----=_NextPart_000_0024_01CD1067.9B37BE50" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.7 required=5.0 tests=HTML_20_30, HTML_FONTCOLOR_UNKNOWN,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 x-aol-global-disposition: G X-AOL-SCOLL-SCORE: 0:2:514176160:93952408 X-AOL-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-d226.1 ; domain : mx.aol.com DKIM : pass x-aol-sid: 3039ac1d60cb4f78d7060697 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Dies ist eine mehrteilige Nachricht im MIME-Format. ------=_NextPart_000_0024_01CD1067.9B37BE50 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Thanks to all who responded to this unusual news. Unlike other some = other stories told today, this one is completely true! It was triggered by the beautiful description of the oscillator on www.leapsecond.com/museum/earth However the frequency given there is slightly incorrect, as it was = calculated from a 24 h solar day, instead of the slightly shorter = rotation period in an inertial system. The electromagnetic signal is caused by the earth's magnetic dipole = moment (8e22 Am^2) rotating around the N-S axis at an 11 degree tilt = angle. The radiation power from the rotating component can be calculated = as 2 * 0.5 * 31171 ohm * (8e22 Am^2 * sin(11=C2=B0) )^2 / lambda^4 =3D 16 = =C2=B5W, with the first factor of 2 for the "turnstile" configuration, equivalent = to two loops fed in quadrature. A report from the far field (1 lightday / 2pi) would certainly be good = news for the SETI community ;-) Congratulations to Jim for uncovering the Doppler modulation caused by = annual motion of earth, an effect which I hadn't thought of. Depending = on the position of an observer relative to the ecliptic, the 31.7 nHz = sidebands due to this "Moritz effect" could be up to -35 dBc, which = should be quite noticable ;-) Happy springtime to all in the group, Markus (DF6NM). From: Markus Vester=20 Sent: Sunday, April 01, 2012 8:28 AM To: rsgb_lf_group@blacksheep.org=20 Subject: ULF: 11.6 =C2=B5Hz transmission Dear LF, in a joint project including a number of radio amateurs, our group is = working on a large experimental earth-antenna system, which is able to = radiate an ultra-low frequency signal at low power.=20 We are currently transmitting an unmodulated test carrier on 11.60576 = =C2=B5Hz, and (according to our measurements) are achieving a radiated = power of 16 microwatts. Frequency stability is on the order of 1e-8, = which should enable narrow bandwidth observations with high sensitivity. The transmission has been on air for a while. Any reception reports = (especially of far-field detections) would be much appreciated. Best 73, Markus (DF6NM) ------=_NextPart_000_0024_01CD1067.9B37BE50 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable
Thanks to all who responded to this = unusual news.=20 Unlike other some other stories told today, this one is completely=20 true!
 
It was triggered by the beautiful = description of=20 the oscillator on
 www.leapsecond.com/museum= /earth
However=20 the frequency given there is slightly incorrect, as it was calculated = from a 24=20 h solar day, instead of the slightly shorter rotation period in an = inertial=20 system.
 
The electromagnetic signal is caused by = the earth's=20 magnetic dipole moment (8e22 Am^2) rotating around the N-S axis at an 11 = degree=20 tilt angle. The radiation power from the rotating component can be = calculated=20 as
 2 * 0.5 * 31171 ohm * (8e22 Am^2 * sin(11=C2=B0) )^2 / = lambda^4 =3D 16=20 =C2=B5W,
with the first factor of 2 for the "turnstile" = configuration, equivalent=20 to two loops fed in quadrature.
 
A report from the far field (1 lightday = / 2pi)=20 would certainly be good news for the SETI community ;-)
 
Congratulations to Jim for uncovering = the Doppler=20 modulation caused by annual motion of earth, an effect which I hadn't = thought=20 of. Depending on the position of an observer relative to the ecliptic, = the 31.7=20 nHz sidebands due to this "Moritz effect" could be up to -35 dBc, which = should=20 be quite noticable ;-)
 
Happy springtime to all in the = group,
 
Markus (DF6NM).

Sent: Sunday, April 01, 2012 8:28 AM
Subject: ULF: 11.6 =C2=B5Hz transmission

Dear LF,
 
in a joint project including a number of radio amateurs, our group = is=20 working on a large experimental earth-antenna system, which is able to = radiate=20 an ultra-low frequency signal at low power.
 
We are currently transmitting an unmodulated test carrier on = 11.60576 =C2=B5Hz,=20 and (according to our measurements) are achieving a radiated power of 16 = microwatts. Frequency stability is on the order of 1e-8, which should = enable=20 narrow bandwidth observations with high sensitivity.
 
The transmission has been on air for a while. Any reception reports = (especially of far-field detections) would be much appreciated.
 
Best 73,
Markus (DF6NM)
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