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Re: March 07 2025 Possible Io-C Heliotown

 

It is interesting to see that you got some signal, although considerably weaker, ?in the RCP channel. ?I checked a few times last night to see what I was getting in the RCP channel, but I didn¡¯t see anything. ?I clearly have to make a more detailed comparison.
?
Richard


Re: March 07 2025 Possible Io-C Heliotown

 

Hi Thomas,
?
Nice! ?I will pull up my spectrograms at those times. ?It will be interesting to see if a few thousand miles makes a difference in what is received.
?
i am in western North Carolina.
?
Richard


March 07 2025 Possible Io-C Heliotown

 

March 07 2025 Possible Io-C coinciding with Richard's spectrograms. Tom

PS : Where are you located Richard?


HEADS UP Io-B March 08. ~2300 UT

 

Heads Up! down the center pass Io-B March 08. ~2300 UT

You will need to check your own RJPRO for your specific timing and location.


Re: Solar events 07 March

 

I love it when everyone gets in the action!

John




On Saturday, March 8, 2025, 9:55 AM, Carl Pajak Phone via groups.io <pajakonice@...> wrote:

Good Day All,
To add to the soup bowl of posts, here are mine.? Got some good ones, at the tail end of posting.? On the far West side, I picked up where the rest left off.

Carl
Wasilla AK, USA


Re: Solar events 07 March

 

¿ªÔÆÌåÓý

Carl, Sweeeet !!


On 3/8/25 09:55, Carl Pajak Phone via groups.io wrote:

Good Day All,
To add to the soup bowl of posts, here are mine.? Got some good ones, at the tail end of posting.? On the far West side, I picked up where the rest left off.

Carl
Wasilla AK, USA


Solar events 07 March

 

Good Day All,
To add to the soup bowl of posts, here are mine.? Got some good ones, at the tail end of posting.? On the far West side, I picked up where the rest left off.

Carl
Wasilla AK, USA


Re: The Io-C storm

 

Hi Richard,

That narrow band stuff is common in Io-C. It's called an "N event." N for narrow band. N events can be smooth and continuous, or they can be made of trains of narrow band S bursts (what your spectrogram looks like), or they can be a combination of both. Usually in Io-C, we see the S burst trains early in the storm, shifting to continuous emission style N events later in the storm. Usually. Not always. Everything related to Jovian DAM is probabilistic, very few absolutes.

Io-C exhibits what are known as vertex-late arcs. For we who observe in the upper half of the HF band, that means the frequency drift over time is negative. The downward freq drift you observed is exactly what we expect from Io-C.

One of these days I want to write a tutorial about the phase plane and arc shapes and polarization and emission types and a bunch of other stuff, all aimed at the Radio JOVE audience.

But, my round tuit has been finite yet unbounded for decades, so in the meantime here are a few good references:






--
Dave

On 3/7/25 23:23, Richard Gray via groups.io wrote:
Hi Dave,
Thanks! I am particularly interested in the first spectrogram, the one between
22:56 and 22:58 UTC that shows very narrow band emissions at about 18.5 MHz,
slowly decreasing in frequency that go on for about a minute or so. What can
you tell me about those?
Another interesting feature that I noticed over the course of the storm, and
that is the emissions started at about 22-24 MHz, but by the end of the storm
were around 14 - 16MHz. Is that normal for Io-C?
Richard


Re: The Io-C storm

 

Hi Dave,
?
Thanks!? I am particularly interested in the first spectrogram, the one between 22:56 and 22:58 UTC that shows very narrow band emissions at about 18.5 MHz, slowly decreasing in frequency that go on for about a minute or so.? What can you tell me about those?
?
Another interesting feature that I noticed over the course of the storm, and that is the emissions started at about 22-24 MHz, but by the end of the storm were around 14 - 16MHz.? Is that normal for Io-C?
?
Richard


Re: The Io-C storm

 

Outstanding spectrograms, Richard. Nothing seen here in the 2-element array.
--
Dave

On 3/7/25 21:31, Richard Gray via groups.io wrote:
Lots of Io-C, in the LCP channel. I am posting some of the better events.
Richard


Re: Solar. 07/03/2025

 

Good job Salvador!

John




On Friday, March 7, 2025, 7:18 PM, salvador aguirre via groups.io <drsaguirre@...> wrote:

HI
?
Solar events Today,
?
Salvador


Some Solar March 07, 2025

 

Some solar before the Io-C storm.? The first one is certainly solar, the second (image B) is peculiar.
?
Richard


7 MAR 2025

 

Observations from Grafton, WV.
Some solar, one unknown, and no Jupiter (outside of my antenna / horizon ).
~Duane


Re: Possible Io-C in progress 2225UT March07 2025

 

We saw a lot of spectacular Io-C.? I will post some later in the evening.
?
Richard


Re: Possible Io-C in progress 2225UT March07 2025

 

Tom.
?
Thanks for the Update.
?
Regards
?
Salvador


Possible Io-C in progress 2225UT March07 2025

 

Possible Io-C in progress 2225UT March07 2025. Or might be Sun. Yet, looks
like Jupiter. Tom


Re: Solar 03/05/2025 Easley, South Carolina

 

Thanks Richard. Looks great. Some good solar just happened a few minutes ago.?Plan to publish tonight.

John




On Friday, March 7, 2025, 11:54 AM, Richard Gray via groups.io <grayro@...> wrote:

The same events from the Dark Sky Observatory
?
Richard