Hi Alex, Markus, Lubos, VLF,
Markus, Lubos: But the signals have been ON to the same time (abt 9 UTC)
on air than the Alphas, at least it looks like that on the slow
scrolling spectrograms!? But maybe you are right. On my RSDN-20_F1 plot
there are visible and unusual disturbances. Maybe they keyed the TX for
short times. A fast running 11904 Hz spectrogram could tell us more,
maybe. I'll forward the mail to Paul Nicholson who probably noticed the
transmissions already ;-)
Alex: Well, if the signal appears in Iceland AND in Germany, i think
it's not local :-) Signal was strong at OK2BVG and YO/4X1RF...
73, Stefan/DK7FC
Am 01.08.2011 16:28, schrieb Alex Deligiannis:
On 1/8/2011 1:53 μμ, Stefan Schäfer wrote:
VLF,
There are strange transmissions near 12.4, 13.3 and 15.6 kHz, narrow
band, very strong here in Heidelberg
http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber.html
and also in Iceland
http://simnet.is/halldorgudmunds/TF3HZ_VLFgrabber/index.html, also
very clear at http://www.ok2bvg.cz/vlfgrabber/ and others.
Does anybody know what it is? Looks different to the often seen
staircases during transmitter tests...
Unfortunately many VLF grabbers are paused / OFF these times...
73, Stefan/DK7FC
Must be local I can't see anything unusual and the noise is low at KM39gc
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