Given a 3 hour VO/VK window,
http://abelian.org/ebnaut/calc.php?sndb=15&snbws=92e-6&code=16K21&sp=10&L=1&nc=5&submit=1
shows you need to reach 15dB S/N in 92uHz to get a 5 char message
across, and
http://abelian.org/ebnaut/calc.php?sndb=12.5&snbws=92e-6&code=16K21&sp=12.5&L=1&nc=3&submit=1
12.5dB for a 3 char message.
This assumes the path remains stable for 3 hours which is probably
optimistic.
A 2 char message with 14 second symbols needs S/N 11dB in 92uHz.
Everything hinges on that carrier measurement.
Markus wrote:
> Fewer and weaker decodes than the night before:
Here it was better than the previous night,
VO1NA 2015-12-01/02 8K19A 2S 5C
start Eb/N0 BER rank
19:00 1.0 35.2% 684
20:00 3.4 30.7% 0
20:30 13.0 6.5% 0
21:00 10.4 12.9% 0
21:30 11.4 10.4% 0
22:00 9.2 16.2% 0
22:30 11.7 9.6% 0
23:00 14.0 4.3% 0
23:30 12.6 7.2% 0
00:00 6.5 23.6% 0
00:30 10.5 12.7% 0
01:00 0.2 36.3% 6893
01:30 8.3 18.8% 0
02:00 4.5 28.3% 0
02:30 -1.0 38.1% 47236
05:00 4.2 29.1% 0
05:30 11.0 11.3% 0
06:00 4.5 28.3% 0
07:00 7.2 21.7% 0
08:00 7.2 21.7% 0
08:30 6.3 24.0% 0
09:00 0.2 36.3% 84968
--
Paul Nicholson
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