Technical Topics > Propagation

Long Distance MW propagation in SE USA during daylight

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legis225:
Since the end of December I have noticed local AM signals being overtaken by DX during the day.  Here in Jacksonville FL I can clearly hear WSB and WBT Radio Encyclopedia And many others well into the afternoon.  It calms down when the sun is highest in the sky but picks up again around 3 pm.  The would guess in the northern latitudes this effect is more pronounced.  Jacksonville is about 31 degrees north.

Anyone else notice this?

Pigmeat:
Winter is good for MW DX in the S.E. during the daytime as thunderstorms are at a minimum. Mid-March through a solid chunk of November is thunderstorm season. The static levels go way up as does the damage to your hearing as you try to dig the weak ones out.

ChrisSmolinski:
As Pigmeat noted, there's fewer thunderstorms, and the lower solar angle means a weaker D layer (which absorbs signals, especially MW) is weakest during the winter.

Plus we're at solar minimum.  Enjoy it while you can.

Josh:
Notice same here, many locals are way down earlier in the afternoon compared to dx, 880 out of nyc comes in much closer to 5pm instead of 9pm this time of year.

pinto vortando:

--- Quote from: ChrisSmolinski on January 17, 2019, 1343 UTC ---
 the lower solar angle means a weaker D layer (which absorbs signals, especially MW) is weakest during the winter.


--- End quote ---

this ^^^     along with fewer T-storms and low point on the sunspot cycle

Notice skip still coming in here from the east coast as much as an hour or more after sunrise
and the locals start getting pounded in the afternoon around 1600.

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