Re: [IRCA] Skywave-groundwave

[Russ Edmunds <wb2bjh@xxxxxxxxx>]

--- Bill Harms <wharms@xxxxxxxxxxxxxx> wrote:

> Pat:
> 
> 	I had understood that "extended reception" like you describe is due 
> to a thin D-Layer. 
> 


*** Correct. In winter, the D layer, which would normally block the
daytime E layer refraction, thins and permits some of that to get
through. The length of the darkness and shortness of lightm, especially
on more northerly paths doesn't allow sufficient time for the daytime D
layer to build back up to full strength.



Russ Edmunds
Blue Bell, PA ( 360' ASL )
[15 mi NNW of Philadelphia]
40:08:45N; 75:16:04W, Grid FN20id
<wb2bjh@xxxxxxxxx>
FM: Yamaha T-80 & Onkyo T-450RDS w/ APS9B @15'
AM: Hammarlund HQ-150 & 4' FET air core loop


 
____________________________________________________________________________________
No need to miss a message. Get email on-the-go 
with Yahoo! Mail for Mobile. Get started.
http://mobile.yahoo.com/mail 
_______________________________________________
IRCA mailing list
IRCA@xxxxxxxxxxxxxxxx
http://montreal.kotalampi.com/mailman/listinfo/irca

Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers

For more information: http://www.ircaonline.org

To Post a message: irca@xxxxxxxxxxxxxxxx