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Dear Gerhard, VLF dreamers,
yes, this is indeed interesting. We are
probably seeing a phasing effect between skywave and groundwave (or should
I say between ionospheric waveguide modes), which depends on distance and solar
elevation. The constellation between our stations (two transmitters and two
receivers, roughly spaced 200, 400 and 600 km along a straight line)
seems to be favourable for this kind of observations.
On the MSK grabber segment, DHO exhibited
a remarkable frequency selective sunset dip, walking through
the emission band (200 Hz HF-to-LF in about 10 minutes). After 16:10, the VLF traces on my grabber were disrupted
due to local 137 kHz transmit activity.
Best wishes,
Markus (DF6NM)
Sent: Sunday, January 16, 2011 6:18 PM
Subject: Re: LF: OE3GHB_active
Dear Markus
and group!
I'm not sure but probably on your grabber there's a nice
propagation
effect on VLF visible.
I radiated all the time today with
nearly constant power, except some 5
minutes breaks and a half hours of
downtime.
Ossi's signal also was very constant all the time on his
grabber which
is 10km away.
Starting from 12:00z and lasting until
about 14:00z my signal is clearly
stronger than Ossi's signal, while at the
moment, my signal isn't
visible any more and Ossi's signal is still present,
even maybe stronger
than most of the day.
On Stefan's grabber this
effect is not clearly visible.
This is quite
interesting.
73
OE3GHB
Gerhard
Am Sonntag, den
16.01.2011, 14:04 +0100 schrieb Markus Vester:
> Gerhard, good traces in
Heidelberg as well as in Nuernberg! Now at 13
> UT you're passing
8969.965, and still going down very slowly.
>
> 8970.02 has
also come alive.
>
> Best of luck,
> Markus
(DF6NM)
>
>
>
> From: Gerhard Hickl
>
Sent: Sunday, January 16, 2011 10:51 AM
> To: [email protected]
> Subject: Re: LF: OE3GHB_active
>
>
> Hello
group!
>
> I seem to be on 8969.98 drifting downwards.
>
> I have deactivated my VLF grabber because of the strong signal
>
radiated.
>
> Conditions look better than yesterday and also
locally the weather is
> fine. No wind means a stable antenna-wire with
constant current and
> temperature around 8 centigrade.
>
> I
will interrupt my transmission at 10:00z for 5 minutes to make some
>
changes.
>
> A good reception to all listening stations.
>
> 73
>
> OE3GHB
> Gerhard
>
>
> Am Sonntag, den 16.01.2011, 10:15 +0100 schrieb Lubos OK2BVG:
>
> Hello LF!
> > Gerhard is active on 8970Hz.
> >
>
> Lubos, OK2BVG
>
>
>
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