Re: VLF: DK7FC's 8th VLF kite experiment

[Stefan Schäfer <schaefer@iup.uni-heidelberg.de>]

Hello Jacek,

Thank you, interesting! :-)

I just saw that the signal on 8970 Hz is strongest at the end, means the 
last dash of the "M" while the 1 hour transmission is rather weaker. But 
my ERP must have been higher during the 1 hour transmission. There must 
be some propagation effects here!!
Furthermore i saw that your QRN  (not QRM i suppose) is already coming 
up during the "GM" message on my grabber it started to rise at about 17 
UTC, so about 6 hours later.
My final transmission on 8970 Hz, arround 15 UTC, is the strongest 
signal on my grabber although i know that the kite was lower and TX 
power about 3 dB lower, additionally.
So, maybe we should watch these transmissions more carefully. Is it 
possible, that not just the signal but the SNR(!) comes up just before 
the QRN is rising again?
OE3GHB's 5170 Hz capture also shows that my transmission was done during 
the QRN started to rise at his location!
We might take a look on this effect within the next tests!

Best 73, Stefan/DK7FC

Am 27.10.2010 22:39, schrieb Jacek Lipkowski:
> I've summarised results from Stefan's 8th VLF kite experiment here:
> http://www.lipkowski.org/~sq5bpf/dk7fc_20101023/index_en.html
>
> VY 73
>
> Jacek / SQ5BPF