[A-DX] {dxld} Mighty KBC May 21, 2017

[Roger]

Am 21.05.2017 um 16:26 schrieb  [dxld]:
> Mighty KBC May 21, 2017 0000-0200 UTC 9925 kHz via Nauen, Germany.
>
> Not good! Signal and audio missing until abruptly on 0014:25 UTC 
> Signal poor to fair. . .....0130 UTC digital text. Signal now barely 
> heard to poor. 0138 UTC song being played on the Mighty KBC......
> Kraig, KG4LAC


Yes indeed. Also here in the skip zone of Nauen one of the weakest 
signals of the last 6 months.
There was no back-scattering at normal layers, probably only some 
meteorite dust was helpful. Currently, there are no significant 
meteorite streams.
So there were only a few pings and bursts. Best decoder results in this 
particular case in DSB.
In AM and S-AM, the text trigger for the "ghost image" could not be decoded.
In any case, MFSK-32 is more robust than the digital mode for the 
non-decoded RSID.
Here is the sonogram with the signal history  from 01.30z of 7 minutes 
duration:

http://www.rhci-online.net/radiogram/VoA_Radiogram_2017-05-20.htm#9925





roger

(90 miles away from Nauen)