Hi Paul,

Great work, as usual. Thanks.
-2.5 dB, that agrees with the Eb/N0 value of the 4 character message.

73, Stefan

Am 01.03.2017 10:13, schrieb Paul Nicholson:

Stefan wrote (22nd Feb)

> f = 8270.100000 Hz
> Start time: 22.Feb.2017   18:00:00 UTC
> Symbol period: 30 s
> Characters: 8
> CRC bits: 16
> Coding 16K21A


> ...delayed by 30 minutes :-(
> Start time: 22.Feb.2017   18:30:00 UTC

(28th Feb)

> 8chmessage.wav
> Maybe Paul can analyse it further

The message is in there at Eb/N0 = -2.5 dB.
Timing good.   Not sure about frequency yet, still sweeping
(slowly, the PC is full of 16K19 trials).

Error map

 http://abelian.org/vlf/tmp/170301a.gif

suggests better reception during the evening and
it gets worse later, or maybe there's a slight
frequency offset.

--
Paul Nicholson
--