The carrier was on from 9:25 to 12 UT with 0.34 A (13 uW ERP)
and continuous phase. This test produced some surprising results:
A few bright pixels also showed up on Stefan's new tree-grabber
http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html ,
albeit close to the noise and perhaps disrupted by a phase glitch. If
the signal is real, it's a complete surprise as I am due east from
Heidelberg and should be exactly in the minimum of the N-S receive
loop. One could perhaps speculate about steep skywave and Faraday
rotation...
On Lubos' grabber
http://www.ok2bvg.cz/vlf_grabber/index.html the
signal appeared again with excellent SNR up to 20 dB. However although
this receiver is usually glitch-free, there seems to be a break in the
middle ~ 11 UT which is not visible in Heidelberg.
At the same time, Paul's spectrogram
http://abelian.org/vlf/fbins.shtml#p=1456660800&b=110&s=sp
(110°) also shows a gap in the dash. However when the compass rose
is steered towards 140°, the signal comes up exactly at the time of the
gap. So it looks as if the direction of arrival would have temporarily
been slewed southwards. Very strange...
All the best,
Markus (DF6NM)
