Re: VLF: TA east to west?

[DK7FC <selberdenken@posteo.de>]

OK, that's not ideal. False messages must be avoided. It is problematic 
with single character messages.
At least the experienced RX station operator would have doubts with this 
result and interprete it critical because +2.2 dB is quite a high value 
and there is no reason that the message appears at rank 23 (and not at 
rank 0).
Compared with an interpretation of a single DFCW character read out from 
a spectrogram, this is 'T' to 'M' copy and it could happen in QSB that 
e.g. a 'C' is interpreted as a 'K' because the last dash is down in the 
noise. So there is alway the risk for a misinterpretation, in QRSS, in 
DFCW, in CW, in OP32, even in WSPR and of course also in EbNaut.
The noise has been a dB higher last night. Pity! With the same noise 
level as the night before it would have worked well.
But this night i promised to run the 24 hour carrier. I'm starting 15 
UTC today running 1.2 A on 17470.1 Hz.
73, Stefan


Am 08.12.2017 12:04, schrieb Paul Nicholson:
> Forest decoded '4' from the overnight transmission
> 21:30 to 07:06, Eb/N0 = +2.2 dB, rank 23.
>
> This is a false decode.
>
> The correct decode is down at Eb/N0 = -1.3 dB,
> -39.09 dB in 1Hz.
>
> Close, but it's going to need another night.
>
> --
> Paul Nicholson
> --