At 19:08 2018-10-11, Chuck Hutton wrote:
I didn't quite follow this.
(1) A receiver to the east was mentioned, but the example is a
receiver to the west.
>whooops...."receiver to the WEST"....now, why do they call it the
Far East, hi.
(2) which sunset is being referred to? Rx or tx?
>"Japanese sunset" is the receiver sunset, as they were receiving
Argentina, to their east. I think I've gotten that right.And to toss in my opinion (sorry, no scientific facts), a previous
post mentioned that enhancement at the receiver;s local sunbrise can
be zero, some or a lot. True, but (assuming there are not
propagation issues interfering with reception) I very rarely see
little or no enhancement at LSR. I count on a healthy rise in
signals. That's 100% based on coastal experience.
Could it not be that sunrise enhancement also occurs every morning
even at inland locations, but if the maximum signal is still below
the ambient noise (splatter etc.), then it wouldn't be
noticed? More study is needed, but I'll bet that a Seattle DXer
with a Perseus and a simple antenna could set up and record a 1 Hertz
wide window on, say, 594kHz through a marker.log file, to see if
there is blip near sunrise, even when the die hard DXers are saying
that they should have stayed in bed.
Gary's answer is quite correct, and similar boosts occur around
sunset when the receiver is to the east of a transmitter on the other
side of the ocean. Japanese DXers have heard Argentina on 1030
around Japanese sunset for example, and I'm sure Mark Connelly and
others can relate large amounts of DX heard in the eastern USA and
Canada in that situation.