RE: LF: SAQ and VO1NA

["Laurence KL1X" <hellozerohellozero@hotmail.com>]

Alan the previous few hours had shown up to 20dB variations of signals of 
the Eu path from here on signals near 20Khz - I found this sort of 
variability before on TransPolar paths during these disturbed periods on the 
lower LF freqs  and certainly not the stable daytime path you'd (I'd) 
expect. Period  radom fades were in the order of just 30 secs.
I note a web site that monitors the 24Khz Cutler signal from Kentucky with 
real time  sigs graphs on relative signal (lost the link for the time being) 
but X ray enhancements and noizy fades evident on this non Au and shorter 
path,
Its around 8000Kms and an even more northerly path to SAQ than typical - and 
as we have found out just a degree or so intrusion in the "nasty zone" can 
make the odds on attenuation.
Signal noiz levels were low (where low is  reasonable for a golf course!) 
here at the time.
Lots of lovely short tern X ray event enhanced signals from XDW showing up 
on the w3eee grabber over the past days, and the decay curves are even more 
interesting...
Not hearing the signal can be just as interesting as hearing it (but I wish 
I had!!! - well Done Bill et al)
Till next time.....

Cheers Laurence KL1X in 5
em26aq


> From: "Alan Melia" <Alan.Melia@btinternet.com>
> Reply-To: rsgb_lf_group@blacksheep.org
> To: "LF-Group" <rsgb_lf_group@blacksheep.org>
> Subject: LF: SAQ and VO1NA
> Date: Thu, 20 Jan 2005 00:40:40 -0000
>
> Hi all, particularly Lawrence and Jim, It is interesting that your found 
> SAQ
> weaker than expected.  We have had a succession of geomagnetic storms which
> have had some effect on 136. Brians path from Porto to Magdeburg is showing
> some  10dB lower signal than "normal". Another point is that 1700z is just
> around sunset in the UK and there can be a distinct dip in signals as the
> daylight skywade goes out before the darkness skywave picks up strength, so
> it is difficult to make clear judgements on so short a transmission. They
> cannot have been too weak from Grimeton as there was good copy "portable" 
> by
> Bill Ashlock reported on the LWCA reflector. I dont really have a feel for
> the relative differences between 136kHz and 17kHz, the latter is well in 
> the
> "waveguide" propagation part of the spectrum, and the wavelength is so long
> that a layer of absorbing ionisation may not have a great effect. There was
> no reports of fading but this may not be surprising on so short a
> transmission.
>
> Joe was reported early this evening (19th) by Hartmut. My interference has
> subsided now but I have seen nothing at all over the last hour. Even one of
> the more distant Loran lines is a bit broken. It may be that there was a
> path early in the "Twilight period" but absorption set in after true
> darkness on the whole path. Usually I receive Joe almost regardless of
> conditions. He is weaker during storm periods but I rarely lost the trace 
> on
> his frequency.
>
> Cheers de Alan G3NYK
> alan.melia(at)btinternet.com