Hi Roelof, I am not actively following day-by-day reports these days, but I
do remember a condition in one of the last Solar minimum where after a long
geomagnetically quiet period signals seemed to be depressed. I postulated
that maybe the ionisation of the E-region was not only dependent on cosmic
rays but maybe had a charge input from the Solar wind. After a 30 day period
with Kp continualy below 3 we had a Kp=4 coronal hole flow event and
propagation immediately improved again. I wondered, but could not find any
supporting evidence, whether the ionosphere could ''weaken'' and leak
signals into space leading to weaker reception.
Just a wild idea but maybe worth checking against dates and geomagnetic
activity.
Alan
G3NYK
----- Original Message -----
From: "Roelof Bakker" <[email protected]>
To: <[email protected]>
Sent: Saturday, November 03, 2018 4:16 PM
Subject: Re: LF: WSPR 475 kHz
Mike,
Don´t underestimate the power of propagation.
NDB´s from Canada and also MW broadcast stations have been much stronger
than I have seen for
years. Also the number of decodes of Canadian DGPS stations has been
dramatically improved.
The signal of VO1NA on 137.777 kHz produces audio copy here.
73,
Roelof Bakker, pa0rdt
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