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Re: IoA 05/01/2025 Easley, South Carolina

 

Hi Richard,

That's somewhat common.

We Greenman's station was 10 miles due east of mine. We would often see completely different patterns during Jovian DAM events, even in the middle of the night when the F layer is thought to be rather quiescent. And we would equally often see no differences.

I think seeing differences in observed scintillation on a relatively short 10 mile baseline indicates that they're due more to ionospheric dynamics than the dynamics of the IPM. However, that's only a guess based on a gut feeling about the geometry and distances involved; I have no math to back that up.
--
Dave

On 5/3/25 16:14, Richard Gray via groups.io wrote:
Hi John,
Thanks for posting that spectrogram. We clearly got the same isolated burst of
Io-A (although it looks like our clocks are slightly different). What interests
me more is that while the two recordings of the bursts are similar, in detail
they differ. If you look at the individual "flecks", those are quite different
between your recording and mine. You are just about 100 miles south of me. I
wonder what could be causing that? Are those "flecks" caused by interplanetary
scintillation? If so, that is telling us something interesting about the size
scale of the inhomogeneities in the solar wind/interplanetary medium. Maybe
Dave or Chuck would know more.
Richard
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