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Re: LF: Re: LF propagation

To: <[email protected]>
Subject: Re: LF: Re: LF propagation
From: "Graham" <[email protected]>
Date: Mon, 17 Jun 2013 21:04:55 +0100
Importance: Normal
In-reply-to: <[email protected]>
Publishsize: 35969
References: <[email protected]> <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
ÿþ<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML ChildAreas="4" xmlns:canvas><HEAD> <META content="text/html; charset=unicode" http-equiv=Content-Type> <META name=GENERATOR content="MSHTML 8.00.6001.23501"></HEAD> <BODY style="PADDING-LEFT: 10px; PADDING-RIGHT: 10px; PADDING-TOP: 15px" id=MailContainerBody leftMargin=0 topMargin=0 name="Compose message area" CanvasTabStop="false"> <DIV id=PublishHeaderContainer contentEditable=false> <TABLE style="BACKGROUND-COLOR: #f5f5f5; WIDTH: 100%; FONT-FAMILY: Verdana; WHITE-SPACE: nowrap; COLOR: #aaaaaa; FONT-SIZE: 11px; RIGHT: 0px; LEFT: 10px" cellSpacing=0 cellPadding=8> <TBODY> <TR style="MARGIN: 40px"> <TD> <TABLE cellSpacing=0 cellPadding=0> <TBODY> <TR> <TD style="WIDTH: 20px"><IMG alt="Play slideshow" src="cid:BD1BC5E914C64331A0E484ECDFF305F2@AGB" width=16 height=16></TD> <TD title="View photos as a slideshow"><A style="FONT-FAMILY: Verdana; WHITE-SPACE: nowrap; COLOR: #444444; FONT-SIZE: 11px" href="{cafd444a-633c-44ae-a0ce-66538131781a}&amp;image=5E8A655F46F4C97A!2221&amp;imagehi=5E8A655F46F4C97A!2219&amp;CID=6812368846238042490">Play slideshow</A></TD> <TD style="WIDTH: 16px"></TD> <TD style="WIDTH: 20px"><IMG style="TEXT-ALIGN: right" alt="Save all photos" src="cid:87C3BA6262004B249565D8C639D2D013@AGB" width=16 height=16></TD> <TD style="DISPLAY: none" title="Download and save high-resolution versions of these photos"><A style="FONT-FAMILY: Verdana; WHITE-SPACE: nowrap; COLOR: #444444; FONT-SIZE: 11px" name=layoutSaveAllImages>Save all photos </A></TD> <TD style="FONT-FAMILY: Verdana; WHITE-SPACE: nowrap; COLOR: #b2b2b2; FONT-SIZE: 11px; colorsend: #444444" title="With Windows Live Mail, you can save all of the photos in this message in a few simple steps">Want to save all these photos at once? <A href=";project=WL_Mailv3&amp;querytype=keyword&amp;query=segami_lla_evas" name=layoutSaveAllImagesPromote>Learn how </A></TD></TR></TBODY></TABLE></TD> <TD style="TEXT-ALIGN: right">Online pictures are available for 30 days </TD></TR></TBODY></TABLE> <DIV>&nbsp;</DIV></DIV> <DIV style="PADDING-BOTTOM: 2px; PADDING-LEFT: 7px; WIDTH: 100%; PADDING-RIGHT: 5px; PADDING-TOP: 2px"> <DIV>Seems that&nbsp; summer&nbsp; is&nbsp; LF/MF time&nbsp; :- )</DIV> <DIV>&nbsp;</DIV> <DIV>This was&nbsp; one&nbsp; of the&nbsp; better&nbsp; Propagation&nbsp; test&nbsp; ,&nbsp;&nbsp;but how&nbsp; deep&nbsp; was&nbsp; the&nbsp; dip&nbsp; at&nbsp; 0500 ?</DIV> <DIV>&nbsp;</DIV> <DIV>G..</DIV> <DIV>&nbsp;</DIV> <DIV>&nbsp;</DIV></DIV><SPAN contentEditable=false><SPAN style="DISPLAY: block" xmlns:canvas="canvas-namespace-id" layoutEmptyTextWellFont="Tahoma"><SPAN style="DISPLAY: block; MARGIN-BOTTOM: 15px; HEIGHT: 18px; OVERFLOW: visible"></SPAN><SPAN style="DISPLAY: inline-block; MARGIN-BOTTOM: 25px; HEIGHT: 716px; VERTICAL-ALIGN: top; OVERFLOW: visible; MARGIN-RIGHT: 25px"> <TABLE style="HEIGHT: 716px"> <TBODY> <TR> <TD> <DIV style="WIDTH: 920px; HEIGHT: 690px; OVERFLOW: hidden" title="View or save a high-resolution copy of this photo"><A href="" name=msnPhotoHref border="0"><IMG style="MARGIN-TOP: 64px; DISPLAY: inline-block; MARGIN-LEFT: auto" border=0 src="cid:D55593B62B4E46C99BE5FDCCEF32EC35@AGB" width=920 height=562></A></DIV></TD></TR> <TR> <TD> <DIV style="TEXT-ALIGN: center; WIDTH: 920px; FONT-FAMILY: verdana; FONT-SIZE: 10pt"></DIV></TD></TR></TBODY></TABLE></SPAN></SPAN></SPAN> <DIV style="PADDING-BOTTOM: 2px; PADDING-LEFT: 7px; WIDTH: 100%; PADDING-RIGHT: 5px; HEIGHT: 50px; PADDING-TOP: 2px"> <DIV>&nbsp;</DIV> <DIV>&nbsp;</DIV> <DIV><BR><BR><BR><BR><BR><BR><BR><BR><BR><BR>--------------------------------------------------<BR>From: "Alan Melia" &lt;;<BR>Sent: Monday, June 17, 2013 6:34 PM<BR>To: &lt;;<BR>Subject: LF: Re: LF propagation<BR><BR>&gt; I think you have be carefull interpreting this paper....the term "LF" would <BR>&gt; seem to refer to low HF though my German is not good enough to understand it <BR>&gt; fully. The ionospheric effects at these higher frequencies are completely <BR>&gt; different to what happens below 500kHz<BR>&gt; <BR>&gt; There are so called "focussing" effects and effects due to ionospheric <BR>&gt; "tilt".....but there also other effects at LF. It is easy to be led astray <BR>&gt; relying perhaps only on amateur transmissions. I recollect over long periods <BR>&gt; the best times at 136kHz were either just after sunset, or just before dawn <BR>&gt; ....few good periods seemed to happen around dark period at the receive site <BR>&gt; (03:00 local time) Modern beacons and auto logging could definitely add to <BR>&gt; knowledge in this area. However there are also questions......nothing will <BR>&gt; be received if the transmitter has stopped transmitting, but it will look <BR>&gt; like poor propagation.<BR>&gt; <BR>&gt; Alan<BR>&gt; G3NYK<BR>&gt; <BR>&gt; ----- Original Message ----- <BR>&gt; From: "Stefan Schýÿfer" &lt;;<BR>&gt; To: &lt;;<BR>&gt; Sent: Monday, June 17, 2013 5:31 PM<BR>&gt; Subject: LF: LF propagation<BR>&gt; <BR>&gt; <BR>&gt;&gt; Hi all,<BR>&gt;&gt;<BR>&gt;&gt; I just want to share this link, <BR>&gt;&gt;<BR>&gt;&gt;<BR>&gt;&gt; There is a picture which shows nicely why the best S/N of a LF DX signal <BR>&gt;&gt; is achieved just before the sunrise at the TX location, when the RX <BR>&gt;&gt; station is in the west, as we can see daily in TA detections. If German is <BR>&gt;&gt; not your language, just use google translate.<BR>&gt;&gt;<BR>&gt;&gt; 73, Stefan/DK7FC<BR>&gt;&gt; <BR>&gt; <BR>&gt;</DIV></DIV> <DIV style="MARGIN-TOP: 50px" contentEditable=false> <TABLE style="BACKGROUND-COLOR: #f5f5f5; WIDTH: 100%; FONT-FAMILY: Verdana; WHITE-SPACE: nowrap; FONT-SIZE: 11px; RIGHT: 0px; LEFT: 10px" cellSpacing=0 cellPadding=10 align=left> <TBODY> <TR> <TD title="Join Windows Live to share photos using Windows Live Photo E-mail" colSpan=2><A style="COLOR: #444444" href="">Get Windows Live Mail to create your own photo e-mails </A></TD></TR></TBODY></TABLE></DIV></BODY></HTML>

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