Edgar, VLF,
After evaluating the latest 4 days of carrier transmissions it shows
that the path from DL to VK7 is quite unstable, i.e. the phase is very
dynamic. When applying different frequency offsets, it seems that the
best start time for a message attempt is 16:30 UTC these days. The SNR
then peaks when applying a -40 uHz offset, attached. Something between
2...3 hours seems to be best. Currently 2 hours seem to give better
results but 3 hours would be less dynamic.
Based on this data i'm trying:
f = 17470.1000 Hz
Start time: 17.SEP.2018 16:30:00 UTC (daily)
Symbol period: 10 s
Characters: 3
CRC bits: 19
Coding 16K21A
Duration: 02:32 [hh:mm]
Antenna current: 1.2 A
73, Stefan
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latest_SNR.png
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