Delivered-To: daveyxm@virginmedia.com Received: by 10.50.237.98 with SMTP id vb2csp76170igc; Sun, 9 Mar 2014 19:07:46 -0700 (PDT) X-Received: by 10.180.11.36 with SMTP id n4mr6079480wib.4.1394417266215; Sun, 09 Mar 2014 19:07:46 -0700 (PDT) Return-Path: Received: from post.thorcom.com (post.thorcom.com. [195.171.43.25]) by mx.google.com with ESMTP id fq9si1768973wib.64.2014.03.09.19.07.45 for ; Sun, 09 Mar 2014 19:07:46 -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=fail (test mode) header.i=@comcast.net Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1WMpG7-00087c-T3 for rs_out_1@blacksheep.org; Mon, 10 Mar 2014 01:44:03 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1WMpG7-00087T-08 for rsgb_lf_group@blacksheep.org; Mon, 10 Mar 2014 01:44:03 +0000 Received: from qmta14.emeryville.ca.mail.comcast.net ([76.96.27.212]) by relay1.thorcom.net with esmtp (Exim 4.82) (envelope-from ) id 1WMpG3-0003cP-1L for rsgb_lf_group@blacksheep.org; Mon, 10 Mar 2014 01:44:01 +0000 Received: from omta11.emeryville.ca.mail.comcast.net ([76.96.30.36]) by qmta14.emeryville.ca.mail.comcast.net with comcast id bdTo1n0050mlR8UAEdjwgW; Mon, 10 Mar 2014 01:43:56 +0000 Received: from Owner ([166.137.182.142]) by omta11.emeryville.ca.mail.comcast.net with comcast id bdha1n00L34kqxi8XdhgxR; Mon, 10 Mar 2014 01:41:50 +0000 X-DKIM-Result: Domain=comcast.net Result=Signature OK From: "hvanesce" To: Date: Sun, 9 Mar 2014 18:41:28 -0700 Message-ID: <048001cf3c01$e513fd00$af3bf700$@comcast.net> MIME-Version: 1.0 X-Mailer: Microsoft Outlook 14.0 Thread-Index: Ac88ADDflSDUCesjR6+8AfNsSDwMdA== Content-Language: en-us DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=comcast.net; s=q20121106; t=1394415836; bh=rlnBJPmyjx5yQlZScsUNVp/pGCBKNvuUXey9OZkVYg0=; h=Received:Received:From:To:Subject:Date:Message-ID:MIME-Version: Content-Type; b=pHQ20pi56/FYt4H/Oq2r/CBexdG3Eq8TeQbrfeoTbMgSNU0sUp6Qa3va/03Gaw8zr hRlwtv6I7hISTwBguSnC8WsTPqQf+02C8/5Xu3O82KwUI7vakRRP0ZHNxPKDNtS71r 8AD3ULN+kLrOjpRQYWsbUVJKD4dq4C89Liw3Uvro6I6Nmm9nblh/M3tD2LIwdonfLp glEhSeY3A0mMojNwuDXMp+qhZ8eRgXJzIFcYXv1d3lWBnIKXoJJ/4kZshgeDXdum1k 1u82XCsXlXUdjFJeO6c/PBlZIMVe8My7cE7DuoNpE4W8XZvJKSn65/Ls9qjalo1bSY jtR7vfJUNe7jA== X-Spam-Score: 0.0 (/) 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: http://59.160.210.74:8080/jspui/bitstream/123456789/454/1/VLF%20signals%20in %20summer.pdf (Bose National Centre for Basic Sciences) http://www.ursi.org/proceedings/procGA11/ursi/GP2-15.pdf Paul, [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [76.96.27.212 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (hvanesce[at]comcast.net) -0.0 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -0.0 SPF_PASS SPF: sender matches SPF record 0.0 NORMAL_HTTP_TO_IP URI: Uses a dotted-decimal IP address in URL 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: 4933636f78fd1782d378a0372a2e835c Subject: LF: Interesting Data Content-Type: multipart/alternative; boundary="----=_NextPart_000_0481_01CF3BC7.38B60F60" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.3 required=5.0 tests=HTML_60_70,HTML_MESSAGE, NORMAL_HTTP_TO_IP 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 This is a multipart message in MIME format. ------=_NextPart_000_0481_01CF3BC7.38B60F60 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit http://59.160.210.74:8080/jspui/bitstream/123456789/454/1/VLF%20signals%20in %20summer.pdf (Bose National Centre for Basic Sciences) http://www.ursi.org/proceedings/procGA11/ursi/GP2-15.pdf Paul, I'm sending this link because the data seems unusual. I thought it might come in handy if something of this sort appears in efforts within this group; but I am not inclined to have confidence in the results of the attached unless I happen to run across similar independent results (and I did not, in my search last week). So, I'm planning to just file the attached but thought you might want to see it because it's interesting if not well-supported by other studies. Plots* in the link below show an interesting distribution of VLF broad daytime amplitude maxima that are (a) greater than, or (b) less than nighttime maxima. The study used a single transmitter (18.2 kHz), and receivers at distances from 500 km to ~ 3,000 km, with two-week collections in summer and winter. I tried to correlate (a) or (b) (daytime maxima greater than or less than nighttime maxima) with distance or bearing and did not find a reasonable correlation. In winter 3 of 9 RX stations had daytime amplitude (broad) maxima greater than nighttime maxima. In summer 3 of 12 RX stations had daytime amplitude (broad) maxima greater than nighttime maxima. Winter "day maximum minus night maximum" (averaged over 2 weeks) ranged (by RX station) from +20 dB to -11 dB, with 6 of 9 RX stations on the - side; the winter average of all RX stations seemed to be around -0.5 dB Summer "day maximum minus night maximum" (averaged over 2 weeks) ranged (by RX station) from +8 dB to -10 dB, with 9 of 12 RX stations on the - side; the summer average of all RX stations seemed to be around -2 dB The wide range of "day maximum minus night maximum" results (by RX station), together with the absence of any apparent correlation with distance or bearing, makes this data seem unusual. Well, maybe not for LF/VLF. * Figure 3 and Figure 7 73, Jim AA5BW ------=_NextPart_000_0481_01CF3BC7.38B60F60 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

http://59.160.210.74:8080/jspui/bitstream/12345= 6789/454/1/VLF%20signals%20in%20summer.pdf (Bose National Centre for = Basic Sciences)

http://= www.ursi.org/proceedings/procGA11/ursi/GP2-15.pdf

 

 

Paul,

 

I’m = sending this link because the data seems unusual. I thought it might = come in handy if something of this sort appears in efforts within this = group; but I am not inclined to have confidence in the results of the = attached unless I happen to run across similar independent results (and = I did not, in my search last week). So, I’m planning to just file = the attached but thought you might want to see it because it’s = interesting if not well-supported by other studies. =

 

Plots* in the = link below show an interesting distribution of VLF broad daytime = amplitude maxima that are (a) greater than, or (b) less than nighttime = maxima.

 

The study = used a single transmitter (18.2 kHz), and receivers at distances from = 500 km to ~ 3,000 km, with two-week collections in summer and = winter.

 

I tried to = correlate (a) or (b) (daytime maxima greater than or less than nighttime = maxima) with distance or bearing and did not find a reasonable = correlation.

 

In winter 3 = of 9 RX stations had daytime amplitude (broad) maxima greater than = nighttime maxima.

In summer 3 = of 12 RX stations had daytime amplitude (broad) maxima greater than = nighttime maxima.

 

Winter = “day maximum minus night maximum” (averaged over 2 weeks) = ranged (by RX station) from +20 dB to -11 dB, with 6 of 9 RX stations on = the - side; the winter average of all RX stations seemed to be around = -0.5 dB

Summer = “day maximum minus night maximum” (averaged over 2 weeks) = ranged (by RX station) from +8 dB to -10 dB, with 9 of 12 RX stations on = the - side; the summer average of all RX stations seemed to be around -2 = dB

 

The wide = range of “day maximum minus night maximum” results (by RX = station), together with the absence of any apparent correlation with = distance or bearing, makes this data seem unusual. Well, maybe not for = LF/VLF.

 

 

* Figure 3 = and Figure 7

 

=

73,  Jim = AA5BW

------=_NextPart_000_0481_01CF3BC7.38B60F60--