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From: "Alan Melia" <alan.melia@btinternet.com>
To: <rsgb_lf_group@blacksheep.org>
Date: Tue, 10 Jul 2007 12:45:11 +0100
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Subject: LF: 500 daytime propagation
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Status: O

Hi all, There is a new and fairly active sun-spot #963 which has begun to
traverse the Solar disc in the last couple of days. The NOAA solar flux
plots show this is quite active and the background X-ray levels have
increased a lot from the quiet conditions we have mostly seen over the last
few months. This kind of activity would shake the daytime paths up a little
on 136khz and possible give an increase in signal of up to 8 to 10 dB at
mid-day. I am not sure what the effect will be on 500kHz with the generally
shorter paths. It is possible that levels of absorption may increase and
signals be poorer than normal.

I am interested in collecting any comments comparing conditions in the next
10 to 14 days with say the last month. I do not have any beacon paths on
500kHz to monitor so I am a bit light on data. The major problem is that the
increased level of T-storms recently may increase the noise level making
signals seem weaker even in day-time

Thanks
Cheers de Alan G3NYK
LF Prop. report at
www.alan.melia.btinternet.co.uk/latest.htm