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Is this you signal Stefan ?
Sent: Thursday, February 07, 2013 5:03 PM
Subject: Re: LF: Europe to South America on 2200m in
WSPR-15
Oh yes, the wideband window looks quite interesting on Martin's
grabber: The 15 minute long dashes of the US WSPR-15 stations were clearly
visible arround 137.6 kHz. Arround 3:30 UTC they AND THE QRN became much weaker.
However the behaviour of the levels of DCF-39 remained normal.
When looking
to http://lasp.colorado.edu/space_weather/dsttemerin/dsttemerin.html
there was an event during the night that may have lowered the US signals on that
path, and the QRN coming from there.
This may have improved my SNR in the
next hours. Rare events and constellations.
Answer to your incoming
email: The QRG is 137.615 kHz (as written in the table). I run a 50%
cycle.
73, Stefan/DK7FC
Am 07.02.2013 17:52, schrieb Stefan
Schäfer:
G..
The wideband and DCF plot of that time is still on the
website. Martin shuts down the PC during daytime.
S..
Am
07.02.2013 17:44, schrieb Graham:
Only a single decode in the wspr
data base , for such a signal level , what
did the grabber show over this time
period ?
G..
Sent: Thursday, February 07, 2013 1:28 PM
Subject: LF: Europe to South America on 2200m in
WSPR-15
LF,
I'm most excited to see that my last nights
WSPR-15 transmission starting 5:30 UTC was decoded by YV7MAE in
Venezuela:
| Timestamp |
Call |
MHz |
SNR |
Drift |
Grid |
Pwr |
Reporter |
RGrid |
km |
az |
| 2013-02-07 05:30 |
DK7FC |
0.137615 |
-33 |
0 |
JN49ik |
1 |
YV7MAE |
FK81bd |
7812 |
264 |
That's a
first digimode one-way between these continents on LF. The SNR wasn't even
close to the decode limit. Actually the is room for another 6 dB :-) The
losses here on the TX side were even quite high due to the bad
WX.
Thanks to Martin/YV7MAE for running the RX system (http://dl.dropbox.com/u/74746618/LF/YV7MAE_LF_Grabber.html
) all the time and thanks to Joe/K1JT for develpoing this great
software.
Image: https://dl.dropbox.com/u/19882028/LF/DL-YV.png
73,
Stefan/DK7FC
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