Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mh04.r1000.mx.aol.com (Internet Inbound) with ESMTP id 8236338000084; Thu, 10 Nov 2011 04:55:56 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1RORLA-00036b-Me for rs_out_1@blacksheep.org; Thu, 10 Nov 2011 09:54:36 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1RORLA-00036S-5T for rsgb_lf_group@blacksheep.org; Thu, 10 Nov 2011 09:54:36 +0000 Received: from outbound-queue-2.mail.thdo.gradwell.net ([212.11.70.35]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1RORL8-0000xx-Jw for rsgb_lf_group@blacksheep.org; Thu, 10 Nov 2011 09:54:36 +0000 Received: from outbound-edge-2.mail.thdo.gradwell.net (bonnie.gradwell.net [212.11.70.2]) by outbound-queue-2.mail.thdo.gradwell.net (Postfix) with ESMTP id 38307220E9 for ; Thu, 10 Nov 2011 09:54:33 +0000 (GMT) Received: from ctuash.plus.com (HELO Hugh) (212.159.90.113) (smtp-auth username ashford, mechanism login) by outbound-edge-2.mail.thdo.gradwell.net (qpsmtpd/0.83) with ESMTPA; Thu, 10 Nov 2011 09:54:32 +0000 Message-ID: <9F4DFD60F7924598906893140FFC27FA@Hugh> From: "Hugh_m0wye" To: References: <4EBAF991.5060509@iup.uni-heidelberg.de> Date: Thu, 10 Nov 2011 09:54:23 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5931 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5994 X-Gradwell-MongoId: 4ebb9f58.2115-532e-2 X-Gradwell-Auth-Method: smtpauth X-Gradwell-Auth-Credentials: ashford X-Spam-Score: 3.4 (+++) X-Spam-Report: autolearn=disabled,FORGED_MUA_OUTLOOK=3.36,HTML_MESSAGE=0.001 Subject: LF: dx forecast and EUV radiation Content-Type: multipart/alternative; boundary="----=_NextPart_000_0025_01CC9F8E.B9A432A0" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: ** X-Spam-Status: No, hits=2.4 required=5.0 tests=FORGED_MUA_OUTLOOK,HTML_30_40, 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 x-aol-global-disposition: G X-AOL-SCOLL-SCORE: 0:2:492821056:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d60d84ebb9fac3281 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none This is a multi-part message in MIME format. ------=_NextPart_000_0025_01CC9F8E.B9A432A0 Content-Type: text/plain; charset="ISO-8859-15" Content-Transfer-Encoding: quoted-printable Hello group, I was re-reading the chapter on propagation in an RSGB book on Operating = Practice, and it said that the ionisation of our precious F layers (and = also the D absorbtion layer) was caused by Extreme UV radiation. This is = wavelengths 120nm up to 10nm.=20 We monitor the solar wind and solar flares to try and predict what = changes in propagation will occur, but these things seem mainly to be = negative influences on propagation - things which disrupt the = propagation. It would be nice to monitor the EUV levels from the Sun as well... so my question is really "does anyone know of a source of Internet data = for this radiation?" I see there are images taken at 17.1, 19.5, 28.4 and 30.4 nm here = http://www.n3kl.org/sun/index.html and elsewhere, but they are just = images, it would be nice to have a NUMBER, akin to the kp index for = geomagnetic activity, giving the total amount of EUV hitting the = ionosphere. Anyway, I should be interested to here the groups thoughts about this. = Apologies if I'm going over things which have been discussed before, I = do try to follow the discussions on the reflector, but I am not able to = read every post. Thanks and 73 Hugh M0WYE ----- Original Message -----=20 From: Stefan Sch=E4fer=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Wednesday, November 09, 2011 10:07 PM Subject: LF: solar wind and LF dx forecast LF, From Alan Melias LF forecast page=20 (http://www.alan.melia.btinternet.co.uk/latest.htm) i got this=20 interesting link: http://www.swpc.noaa.gov/wsa-enlil/ambient/ which is = new for me. It will be interesting for me if we actually have much = worse=20 conds tomorrow... 73, Stefan ------=_NextPart_000_0025_01CC9F8E.B9A432A0 Content-Type: text/html; charset="ISO-8859-15" Content-Transfer-Encoding: quoted-printable
Hello group,
I was re-reading the chapter on propagation in = an RSGB=20 book on Operating Practice, and it said that the ionisation of our = precious F=20 layers (and also the D absorbtion layer) was caused by Extreme UV = radiation.=20 This is wavelengths 120nm up to 10nm.
 
We monitor the solar wind and solar flares to = try and=20 predict what changes in propagation will occur, but these things seem = mainly to=20 be negative influences on propagation - things which disrupt the=20 propagation.
 
It would be nice to monitor the EUV levels = from the Sun=20 as well...
 so my question is really "does anyone = know of a=20 source of Internet data for this radiation?"
 
I see there are images taken at 17.1, 19.5, = 28.4 and=20 30.4 nm here http://www.n3kl.org/sun/index.html and=20 elsewhere, but they are just images, it would be nice to have a NUMBER, = akin to=20 the kp index for geomagnetic activity, giving the total amount of EUV = hitting=20 the ionosphere.
 
Anyway, I should be interested to here the = groups=20 thoughts about this. Apologies if I'm going over things which have been=20 discussed before, I do try to follow the discussions on the reflector, = but I am=20 not able to read every post.
 
Thanks and 73
Hugh M0WYE
 
 
 
 
----- Original Message -----
From:=20 Stefan = Sch=E4fer
Sent: Wednesday, November 09, = 2011 10:07=20 PM
Subject: LF: solar wind and LF = dx=20 forecast

LF,

 From Alan Melias LF forecast page =
(http://www.ala= n.melia.btinternet.co.uk/latest.htm)=20 i got this
interesting link: http://www.swpc.noaa= .gov/wsa-enlil/ambient/=20 which is
new for me. It will be interesting for me if we actually = have=20 much worse
conds tomorrow...

73,=20 Stefan
------=_NextPart_000_0025_01CC9F8E.B9A432A0--