RE: LF: Wasilla Alaska VLF - offline

[Laurence KL7UK <hellozerohellozero@hotmail.com>]

Stefan, Markus and all = thanks - Ill do a 60000 window and cut out the 2nd fft's and Im sure that will help. Never thought about the second window loading till it hits you in the face..the 100% CPU dial is a sure sign of Im doing it wrong :-)
 
Ive tried all sorts of probes and omnis but dissapointed overall in the results s/n wise - . So it was a fortunate I can get the loop out far enough and in a position where I can maximize Eu and still null a lot of the rubbish. Ill do some more playing in the Spring..
 
The housing there in open frame ranch style which affords zero attenuation compared with brick/rebar style contruction giving "some" Faraday cage affects, so Im onto a loser there..

If I was resident in Alaska I would do remote power and link, but even that give the weather and wildlife is problematic during the window of opportunity.
 
 The link to Scott looks interesting but as he and I have found out the path, even over water and comparatively "short" can be very very cranky at LF, and his view of VLF and the stations he can receive is very very different from mine.  Got to just love these Geomag events and heavy Proton events. If I see any Proton event showing up I tend to close the radio room door, put on my skiis and go for a long long walk....
 
Laurence KL 1X  KL7 UK
 

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To: rsgb_lf_group@blacksheep.org
Date: Thu, 24 Mar 2011 06:40:59 -0400
From: markusvester@aol.com
Subject: Re: LF: Wasilla Alaska VLF - offline

Hi Laurence,

 

if I had only one to choose from, I'd definitely opt for the slowest "60000" window at 47 uHz. Depending on antenna orientation, this would definitely give Scott a chance, or perhaps one of us over here. Would an onnidirectional E-field work as well for you as the RX loops?

 

Running the second FFT for the Alphas nearly doubles the CPU load, so you may want to skip that.

 

Thanks for the great work!

 

Best 73, 

Markus

-----Ursprüngliche Mitteilung-----
Von: Laurence KL7UK <hellozerohellozero@hotmail.com>
An: rsgb_lf_group@blacksheep.org
Verschickt: Mi., 23. Mrz. 2011, 15:34
Thema: RE: LF: Wasilla Alaska VLF - offline

VLF pre Eu dawn signals are way down from mid winter Stefan, but that signature increase on DHO38 signal between 0500 and 0700Z is still there. Looks to me like a mid winter opportunity only on this 2 x Auroral oval path at this range, but I could be mistaken. The loop is tensioned from movement by an ice screw in the lake and given the increasing temps Im sure it will come dislodged sooner than later - the other side is tensioned to a Birch tree so I dont think it will move. If Scott warms up his #2 Ill have to get someone to turn the array as hes in a Cosine null at the moment.
 
Ill take a look at the processor and see what gives but welcome any direction on speeds/fft longterm so I can leave one or two screens up longer term without frying the proc..
 
Not sure if Ill be in the same location by next winter :-(( Your going to have to work out how to get an antennae up and stable in the latter part of the of the Eu night for this path to work me thinks :-)))
 
Cheers
Laurence KL7UK, Wasilla Alaska  remote op'd from /5 Oklahoma
 

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Date: Wed, 23 Mar 2011 02:24:25 +0100
From: schaefer@iup.uni-heidelberg.de
To: rsgb_lf_group@blacksheep.org
Subject: Re: LF: Wasilla Alaska VLF - offline

Hello Laurence,

No hope for the end of the season? Maybe you are right, unfortunately. But you'll come back in the next season, isn't it? :-) Or maybe just reducing to wideband and 6000 or so? A pity...
But thanks for the service and the intersting location to watch and sharing the optimism!!
Maybe we'll see what can be done in Greenland, that's a next step into your direction, about...

73 and good luck,

Stefan/ EI/DK7FC

 
 

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