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Re: LF: First MF TA since a longer time

To: <rsg[email protected]>
Subject: Re: LF: First MF TA since a longer time
From: "Alan Melia" <[email protected]>
Date: Sat, 26 Sep 2015 21:07:20 +0100
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Hi Markus I am wondering whether the WSPR or Opera results could help me understand some underlying variations in propagation that I dont seem to be able to pin down. Stefan reports two nights with similar Dst one works for him the other does not. I want to try to determine whether the effect is location,  i.e path length, dependent. so say one station gets good on night A and poor on B whilst another gets poor on A and good on B.  I am particularly interested when Dst is -20nT or higher (Colorado Univ estimate)  All the Dst correlation results are based on measurements on one fixed path.
Anecdotal evidence would not seem to support this but actual measurements on the TA path would pin it down more definitely. Even if everyone in europe gets the same "good" nights it would remove on possible cause. It needs to be at least 4000km path. Ideally two transmitting stations would be reported by the same monitoring atation to remove the effects of local QRM.
----- Original Message -----
Sent: Saturday, September 26, 2015 12:25 PM
Subject: Re: LF: First MF TA since a longer time

Those outstanding receptions have apparently triggered a fair amount of MF WSPR activity last night. Unfortunately it seems the good conditions did not return - no more TA detections have occured, and SNR from DK7FC at TF3HZ was some 10 to 15 dB lower than the night before.
On the side, I happened to snatch a nice Hell signal from DL6TY, with multiple characters sent in parallel. After flipping the horizontal waterfall it became quite readable.
Best 73,

From: DK7FC
Sent: Friday, September 25, 2015 10:41 AM
Subject: Re: LF: First MF TA since a longer time

Hi all,

Last night there were excellent condx on 630m on the TA path! G8HUH, F5WK and DK7FC managed to be decoded in above 5000 km in WSPR.

I've got exceptional good SNR reports!:

Timestamp Call MHz SNR Drift Grid Pwr Reporter RGrid km az
 2015-09-25 04:52   DK7FC   0.475683   -23   0   JN49ik   1   WG2XKA   FN33lq   5970   297 
 2015-09-25 04:32   DK7FC   0.475683   -16   0   JN49ik   1   WD2XSH/17   FN42pb   5927   294 
 2015-09-25 04:32   DK7FC   0.475684   -6   0   JN49ik   1   W1TAG/1   FN43sv   5789   296 
 2015-09-25 00:32   DK7FC   0.475683   -5   0   JN49ik   1   TF3HZ   HP94ad   2440   323 

-6 dB by W1TAG/1 means that many weaker stations could have made the path as well, in that time slot!

73, Stefan
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