Hi Felix,
Thanks for the interesting explanation and the chance for all of us to
try to leave a decode in Antarctica on 630m.
It is quite a challenge of course but due to the good propagation across
sea water we can be optimistic. What we need is a propagation path in
darkness. And indeed VK4YB seems to be the one who has the best chance.
Maybe someone know him and can inform him to be on the air as soon as
the sunset starts at DP0GVN?
Usually we see the best chance for a decode just when the greyline
reaches RX or TX station. I remember getting a transatlantic decode in
late June. It was just during the time when the greyline passed the TX
and the RX site and it was a very short time window. A month later or
earlier did not produce decodes on the same path.
Just to be there right in time i would suggest to try starting 17 UTC.
If you can confirm that you will switch to 630m at that time, i will be
on air then.
73, Stefan
Am 08.03.2018 08:29, schrieb Felix Riess:
Good morning!
Stefan, DK7FC, was kind enough to guide me to this group. I am one of
the operators of the DP0GVN beacon receiver and have just returned
from Antarctica after the successfull installation of the system.
We are using a Red Pitaya STEMlab system with a preamplifier to
receive and decode WSPR signals. The setup is quite versatile and can
monitor up to eight frequencies simultaneously. The antenne for the
low bands is a delta loop with a circumference of approximately 180m,
about one mile south of Neumayer Station III in an electrically very
quiet environment.
We do not usually monitor 630m, but can do so at request. For the time
being, I have included 475.7 kHz daily in the time slot from 0400 UTC
to 0700 UTC, around our local sunrise. These times can be modified by
request. Please do not hesitate to contact me if you would like
conduct tests on LF.
The receiver was on 630m all night long last night, but unfortunately
no spots were recorded, even though I know that quite a few stations
tried.
We plan an upgrade to the beacon receiver next summer that will enable
it to cover more frequencies simultaneously. This would enable us to
monitor LF continously, but that won't happen until early 2019.
Laurence, I enjoyed reading about your previous trips to Antarctica. I
never got to see Neumayer I, have only been traveling south regularly
since 2002 and spent one winter each at Neumayer II and Neumayer III.
73 from Bremerhaven,
Felix, DL5XL (DP1POL in Antarctica)
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