Grey line propagation doesn't necessarily involve signal traveling ALONG
the grey line. In fact, I would guess it typically does not. Chordal
hop enhancement requires a sloped F-layer, which would more likely
involve signal paths more perpendicular to the grey line.
73,
Dave AB7E
On 1/14/2016 5:49 AM, dw wrote:
Hi All,
At Sunrise the grey-line path in January seems to be traveling NE by ~25
degrees and SW by 205 degrees.
At Sunset its traveling NW by 335 degrees and SE by 140 degrees.
In general great-circle propagation information indicates that the
predominant path from New-England to Japan would represent a beam
bearing of NW 335 degrees. And at sunset New-England time, I have found
openings into Japan to confirm that.
So what about New-England to Japan at sunrise, which if one follows
grey-line, would seem to indicate that a beam heading of NE 25 degrees
would represent the heading of maximum signal strength following
grey-line at that time of day.
I'm wondering how that plays out....what have you experienced?
Thanks
N1BBR
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|