Message-ID: <5AA14891.7060505@posteo.de>
Date: Thu, 08 Mar 2018 15:28:33 +0100
From: DK7FC <selberdenken@posteo.de>
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In-Reply-To: <b90d5e2a-6b69-14a1-8979-4a982b07e12f@dl5xl.de>
Subject: Re: LF: Antarctica on 630m WSPR
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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)
>