Hi Markus, |
When looking to Ossi's grabber http://www.langwelle.at/ you can see
sudden level changes by above 10 dB so i assume he used the ballon
antenna + fixed antenna, at least between 12...15 UTC. This is the
section where his signal was visible in my DFCW-600 window. Before and
after the signal does this strong change, it disappeared completely,
probably due to connecting/disconnecting and re-tuning the antenna...
You still can compare the signals of yesterday on today on his grabber.
The signal strength must have been about the same. But today he was
weaker here, comparing equal transmission times and signal levels. It
assume this is due to propagation...
Am 18.01.2011 21:02, schrieb Markus Vester:
Jacek, same here. Yesterday Ossi had
connected a 90m balloon-borne wire to his topload, and he
mentioned wind coming up already during the evening hours. So I assume
today he may have transmitted on his LF antenna "barefoot" -
which isn't too bad either ;-) Regarding noise, QRN seemed to be even
lower than yesterday on all our grabbers.
Sent: Tuesday, January 18, 2011 7:11 PM
Subject: Re: VLF: 8970.02 Hz + 10th
OE5ODL is active today too. what is strange is that the 9kHz amplitude
(both his signal and noise) seem to be much lower, while the gain
been changed from yesterday (i've enclosed the 179uHz waterfall from
last 2 days). there is also a weak trace at 8969.965Hz.
today i don't see anything in 3.8mHz.