We can all provide receptions at 100 miles or more of strong stations
at midday. But even with a steady signal that's not really conclusive
evidence of groundwave only. Determining a signal's arrival angle is
key to determining whether or not there's daytime skywave involved. In
winter daytime skywave is practically a given over paths longer than
300-500 miles. In summer, we don't usually hear long distance midday DX
unless it's an all-water path. That's a further indication that the
winter receptions have a skywave component.
Russ Edmunds
Blue Bell, PA ( 360' ASL )
[15 mi NNW of Philadelphia]
40:08:45N; 75:16:04W, Grid FN20id
<[EMAIL PROTECTED]>
FM: Yamaha T-80 & Onkyo T-450RDS w/ APS9B @15'
AM: Hammarlund HQ-150 & 4' FET air core loop
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