No observations from Grafton, WV.
Been away for a couple of days on a business trip. Reviewed the data for the last couple of days and all black - no signals.
Went out to the dipoles, I see lots of deer tracks and my dipoles are laying on the ground. Got them put back up and we will see what I get these next couple of days.
~Duane
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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
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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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Re: IoA 05/01/2025 Easley, South Carolina
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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Re: IoA 05/01/2025 Easley, South Carolina
Thanks Sabine. Lots of fun!
On Saturday, May 3, 2025, 7:05 AM, Sabine Cremer <sc@...> wrote: Wow, John, that's great!
?
Sabine
--
Germany
Standard time: UTC +1 hour
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Re: IoA 05/01/2025 Easley, South Carolina
Wow, John, that's great!
?
Sabine
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Germany
Standard time: UTC +1 hour
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Yep, see the same thing. Guess we take the same meds.
--
Dave
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On 5/1/25 23:56, Jim Sky via groups.io wrote: /Congratulations/ Duane. A little off subject, but when I stare at the big
solar burst, I get an optical illusion where it looks like the light area is
continually shrinking. Does anyone else see that or should I get my meds checked?
Jim
On Wed, Apr 30, 2025 at 8:42?PM Duane via groups.io <>
<duane919@... <mailto:[email protected]>> wrote:
Observations from Grafton, WV.
Caught two solar and one that looks like Jupiter? What do y'all think of
the Jupiter one?
Thanks,
~Duane
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Re: Solar Events, 2 May 2025, Prospect, ME
Bill: ? ? ?Thanks. I am in an opposite situation. Hoping I did not miss anything later in the day. Obviously, I did miss some.
John
Good evening to all...got a late start today (~1520 UTC, 1120 EDT) but here are two spectrograms.
The first at about 1611 UTC lasted for about 6 minutes contained at least 4 increasingly weak events. The oter at about 1927 UTC was quite strong.
...Hope I didn't miss more earlier in the day.
Best to one & all....bill....
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Re: Solar Events, 2 May 2025, Prospect, ME
HI
?
Solar event here.
?
Salvador
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Re: Solar Events, 2 May 2025, Prospect, ME
HI
?
Solar event here.
?
Salvador
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IoA 04/29/2025 Easley, South Carolina
Good evening one more time: ? ? ? IoA from 04/29/2025. RFI gets in the way somewhat. More thanks to Dr. Gray for the heads-up.
John
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IoA 05/01/2025 Easley, South Carolina
Good evening again: ? ? ? ?IoA from 05/01/2025. Thanks to Dr. Gray for the heads-up.
John
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Solar Events, 2 May 2025, Prospect, ME
Good evening to all...got a late start today (~1520 UTC, 1120 EDT) but here are two spectrograms.
The first at about 1611 UTC lasted for about 6 minutes contained at least 4 increasingly weak events. The oter at about 1927 UTC was quite strong.
...Hope I didn't miss more earlier in the day.
Best to one & all....bill....
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Solar 05/02/2025 Easley, South Carolina
Good evening: ? ? ?Some solar from today. Thunderstorms got in the way this afternoon.
John
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NASA¡¯s Juno Mission Gets Under Jupiter¡¯s and Io¡¯s Surface
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Hawk's Nest Radio Astronomy Observatory
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Sun is producing many Type III radio emissions today, May 02 2025- Tom
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Re: Io-A May 1, 2025 Dark Sky Observatory
Thank you for the response Richard.? ?That is extremely helpful.? I'm 50 feet from the house, but next to my shed which is turning into my radio observatory.? It does have electric. I'll start the process of checking for interference.? Again, thanks for the help.?
Hi Peter,
?
Congratulations on getting your dual dipole up and running.? Jupiter-Io emissions should always look brighter than the background, never darker.? So, I don't think what you detected is indeed Jupiter.
?
What it does look like is that you have a serious case of RFI, but the good news is that when it turns off (21:09:50), it appears that you have quite a good relatively low RFI background.? If your antenna is near your house, the RFI probably comes from some electrical or electronics device that turns on and off automatically, say a heat pump or air conditioner or even your refrigerator.? If you can manage, turn every thing off, check your Radio Jove output, and then turn things back on one by one to try to determine which device is producing the noise.? Sometimes it is surprising.? I found that a small LED bedside lamp was causing lots of RFI for my home RadioJove setup.? Sometimes RFI comes from something your neighbor is running, and then you don't have so much control.?
?
The second spectrogram likewise shows RFI, this time one that turns on and off over a time frame of a few seconds.? That might be a garage door opener, for instance.? At our site at the Dark Sky Observatory, we have quite a low RFI background which helps to explain our good results.? We do, however, have a short burst of RFI when the observatory dome opens (and closes).? It looks a lot like your second spectrogram, although not nearly as pronounced.
?
I should also mention that Jupiter-Io is becoming progressively more difficult to observe with our setups as Jupiter moves into the daytime sky.??
?
Hopefully someone with more experience than me will chime in with some better ideas.
?
Best wishes,? Richard
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Re: Io-A May 1, 2025 Dark Sky Observatory
Hi Dave,
?
Hmm ... an interesting idea!
?
Richard
?
?
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Hi Duane,
?
I checked my output for that time (17:55:46) to see if I detected anything like that.? I did not.? I think what you saw may be some lightning.
?
Best wishes,? Richard
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Re: Io-A May 1, 2025 Dark Sky Observatory
Hi Peter,
?
Congratulations on getting your dual dipole up and running.? Jupiter-Io emissions should always look brighter than the background, never darker.? So, I don't think what you detected is indeed Jupiter.
?
What it does look like is that you have a serious case of RFI, but the good news is that when it turns off (21:09:50), it appears that you have quite a good relatively low RFI background.? If your antenna is near your house, the RFI probably comes from some electrical or electronics device that turns on and off automatically, say a heat pump or air conditioner or even your refrigerator.? If you can manage, turn every thing off, check your Radio Jove output, and then turn things back on one by one to try to determine which device is producing the noise.? Sometimes it is surprising.? I found that a small LED bedside lamp was causing lots of RFI for my home RadioJove setup.? Sometimes RFI comes from something your neighbor is running, and then you don't have so much control.?
?
The second spectrogram likewise shows RFI, this time one that turns on and off over a time frame of a few seconds.? That might be a garage door opener, for instance.? At our site at the Dark Sky Observatory, we have quite a low RFI background which helps to explain our good results.? We do, however, have a short burst of RFI when the observatory dome opens (and closes).? It looks a lot like your second spectrogram, although not nearly as pronounced.
?
I should also mention that Jupiter-Io is becoming progressively more difficult to observe with our setups as Jupiter moves into the daytime sky.??
?
Hopefully someone with more experience than me will chime in with some better ideas.
?
Best wishes,? Richard
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Re: COPIA LIMPIA DE DIBUJO DE ANTENA DE ALTA GANANCIA EA4AND.
Estimado Claudio, saludos fraternos desde Uruguay. Pregunta: si el cable de cobre est¨¢ protegido por barniz como es com¨²n en mi pa¨ªs, afecta en algo la recepci¨®n ? Gracias.
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Dave Typinski
Sabine Cremer
salvador aguirre
Jim Brown
Leonardo UY