[DX] Can anyone explain this?

[FireBrick]

My software logging also provides a gray line display.
I was trying to work Myanmar on 15 cw. Pretty weak.
I looked at the gray line screen and advanced the time but due to the sun's
location there was no time that both I and XZ were both in twilight at the
same time.
But.
There was a time, approx 1800Z that we would both be equidistant from the
gray line.
What I mean is that the amount of time before I was in twilight was just
about equal to the amount of time after dawn in XZ.

So for the heck of it, I checked and sure enough, as that time approached
the XZ signal rose to s2, peaked, and then dropped back down as I approached
twilight. The opening was short, maybe 10-15 minutes.

I will check this out again when I can.
But my question to you is...
What is the reason for this?



-----------------------------------------------------
You May be a CheeseHead if: You decided to have a picnic this summer because
it fell on a  weekend.
-----------------------------------------------------

Bill H. in Chicagoland
w9ol@billnjudy.com
www.billnjudy.com
http://files.billnjudy.com