So 27 hours will not be easy. Wonder whether it is possible to predict the phase change at dawn / dusk, and approximately remove it in a preoprocessing step? All the best, Markus --Ursprüngliche Mit
Indeed, four terminators to cope with. Half the message will have daytime phase and half night time phase and a mess in between. No chance of a decode if day and night phase differs by more than 90
Hi Paul, Yes, it will be interesting. Just 4 hours are gone now, i can't await it! ;-) What about the phase of DHO38, is it useful to get a rough idea about the phase changes? For slower modes (takin
20 hours now, and I ran LWPC which predicts only a 35 degree phase change between day and night. If that works out, then I won't need to do any elaborate diurnal phase compensation, it is well withi
I was impatient, with still 5549.6 seconds left to go I decoded the message easily, 'CQ CQ DREAMERS BAND DE DK7FC IN JN49IK PSE KK' Carrier S/N: 25.03 dB in 10.3 uHz Eb/N0 = 0.1dB with constant refer
Paul, Stefan, great, congratulations both! Strange that according to Stefan's forest grabber the PSK transmission was carrying on long after the scheduled end of sequence (19:01:22 ?). Will now attem
After a few minutes worth of notebook sweat, unfortunately no decode here. The wav is at http://df6nm.bplaced.net/VLF/fec_tests/join_160429_1600.wav (513 kB), and the (empty) log file at http://df6nm
Hello Paul, Markus, VLF, Paul, my congrats to the good result. I think it is not necessary to confirm that the message is correct :-) So the diurnal phase changes are uncritical on our path? Or could
After the full message duration had elapsed, Eb/N0 came to +1.6 dB, Phase: 180 180 150 150 Carrier S/N: 24.96 dB in 10.3 uH Were the last 3 hours corrupted? Without signal, the decoder pads with zero
Hi Paul, VLF, Fine, a nice result! There's not so much margin left. What would hve been the shortest symbol length to get a decode on your side? And can you tell something about the signal stability?
Hi Stefan, aah, yes: The pattern in the spectrogram indeed shows that the little "clown's face" structure is actually being repeated in the last part. So the scheduled re-opening of psk.txt after 24
Error map from Stefan's long transmission, http://abelian.org/vlf/tmp/160429a.gif Each red line indicates a bit error. I can use this recording to try the suggestion by Markus to apply some sort of g
