Big
CONGRATULATIONS to Alex and Joe!
I'm glad to announce that the one-character EbNaut transmission from
VO1NA has also been decoded from the cardioid antenna at DL0AO (near
Amberg, JN59VK). The correct decode "S" first prevailed in a
single-night recording from Dec 23/24, and finally became absolutely
unambiguous after stacking four out of seven nights with equal gain and
phase.
Correlations for single nights:
Eb/N0 phase night
dB deg Dec 2017
-5.5 -54.3 21/22
-4.8 -8.5 22/23
-0.5 -6.5 23/24 (decoded "S")
-20.6 150.3 24/25 (only noise)
-10.7 32.1 25/26 (only noise)
-2.5 -26.5 26/27
-4.4 10.8 27/28
Two nights stacked:
+0.6 -7.3 22/23 + 23/24
-0.8 -9.5 26/27 + 27/28
Four nights stacked:
+2.8 -8.4 22/23 + 23/24 + 26/27 + 27/28
Thanks to Joe for sending consistent repeats, to Bernd and Tom for
setting up the VLF receivers at DL0AO, and of course to Paul and Wolf
for making all this possible in the first place.
Best 73,
Markus
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