To: rsgb_lf_group@blacksheep.org
References: <BCD71DC47DD24A84B6EC3430360D270B@MichaelSappPC>
From: Tobias DG3LV <DG3LV@gmx.net>
Message-ID: <55E834F5.5050008@gmx.net>
Date: Thu, 3 Sep 2015 13:54:29 +0200
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:38.0) Gecko/20100101
 Thunderbird/38.2.0
MIME-Version: 1.0
In-Reply-To: <BCD71DC47DD24A84B6EC3430360D270B@MichaelSappPC>
Subject: Re: LF: Odd sunset captures
Content-Type: text/plain; charset=windows-1252; format=flowed
Content-Transfer-Encoding: 7bit
Sender: owner-rsgb_lf_group@blacksheep.org
Precedence: bulk
Reply-To: rsgb_lf_group@blacksheep.org
Status: O

Hi Mike !

Your screenshot shows Stefan's Callsign as "<DK7FC>". This means it was 
(identified as) one part of a multi-part transmission. To correlate 
those sequential transmissions WSPR uses a hash-table to identify the 
corresponding parts. In your case the 23:04 reception was erroneously 
correlated to a prior(!) transmission of Stefan. As the "decoded" grid 
is not a legal gridsquare, you can be shure the decoding is one of the 
rare incidents, where the significance threshold of the WSPR-decoder was 
still too low to eliminate false decodings. This happens from time to 
time, but you can identify those easily by inspecting the callsign or 
the gridsquare which are either illegal or implausible.

73 de dg3lv Tobias

Am 03.09.2015 um 02:18 schrieb Michael Sapp:
> Hi All: I'm not sure what to think of this....
> https://www.dropbox.com/s/xwnopmbl2fz5ye5/IMG_4537.JPG?dl=0
> I have been experimenting with IF shifting my radio to get WG2XJM very
> strong signal 10 to 13 dB down the IF bandpass
> curve to improve weak signal reception of other stations when Eric is
> transmitting.  Odd sunset partial captures appear
> to be transatlantic, but I am not sure about reality with this data. My
> EWE antenna was configured to favor a SE direction, but with
> 120 degree 3dB beam width pattern it covers the NE as well.   Long
> distance transition zone propagation is a possibility, but I
> would be hesitant to claim it not having received correct grid square
> information......
> 73, Mike wa3tts