Tobias: Thank you for the explanation, I was aware of the multi-part
transmission format, but not sure of the significance in this capture
instance.
73, Mike wa3tts
----- Original Message -----
From: "Tobias DG3LV" <[email protected]>
To: <[email protected]>
Sent: Thursday, September 03, 2015 7:54 AM
Subject: Re: LF: Odd sunset captures
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
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