----- Original Message -----
From: "John Magliacane" <[EMAIL PROTECTED]>
Sent: Tuesday, April 04, 2006 7:00 PM
While every amateur text I've come across states that the D and E layers
disappear at night, they, in fact, do not. They rise to higher altitudes
and
remain ionized through background cosmic radiation.
----------------------------------------------------------------------
So I believe, and the elevated E layer during the night could also be
responsible for some of the single hop transcontinental openings on 6m -
unfortunately IMHO also called Auroral Es openings since they can occur
occasionally when the Aurora is 'quiet'. I have noticed similar openings on
40m at this QTH.
73,
Geoff
GM4ESD
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