Possible super nova remnants ( SNR) ? - Heliotown

#13467

Possible super nova remnants ( SNR) ? Here are some recent spectrograms.
Could be the beginning of SNR season?  Tom - Heliotown

250504094616Heliotownsnr.PNG

250509090657Heliotownsnr.PNG

May 10 2025 Good Io-B - Heliotown

#13466

May 10 2025 Io-B - Heliotown - Tom

250510000030Heliotowniob.PNG

250510000030Heliotowniobdetail.PNG

Re: weird interference, part2

#13465

While the RFI is "on" for less than 2-minutes each burst, from your antenna location, it should be possible to at least determine the source direction using a battery-powered AM radio.? Of course, you might, from home, determine the full frequency extent of the RFI before searching.? There may be frequencies where it is stronger and, therefore, easier to determine the direction of the RFI source.

Dave - W?LEV?

Show quoted text

On Sat, May 10, 2025 at 3:31?PM bsneed1 via <bsneed1=[email protected]> wrote:

Because I don't turn on the "jove" radio each day I don't have a continuous daily record but here's what I've found:

5/9 RFI 2154:30-:55

5/8 None

5/6 RFI 2140-2142

5/5 None

5/4 None

5/3 2132:50-2133:15

5/2 None

4/28 None

4/27 2154:40-2157:30

4/26 22:14-22:18

4/24 None

4/23 None

4/22 None

4/21 None

4/20 2231:30-2232:30

?

The pattern of RFI is not constant but there is always a "wide" signal and then "narrow" ones.

As Duane said, "Weird"...but interesting....John and Duane frequently "hear" stuff that I don't so they may have RFI for my days of None....bill....

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Dave - W?LEV

weird interference, part2

#13464

Because I don't turn on the "jove" radio each day I don't have a continuous daily record but here's what I've found:

5/9 RFI 2154:30-:55

5/8 None

5/6 RFI 2140-2142

5/5 None

5/4 None

5/3 2132:50-2133:15

5/2 None

4/28 None

4/27 2154:40-2157:30

4/26 22:14-22:18

4/24 None

4/23 None

4/22 None

4/21 None

4/20 2231:30-2232:30

?

The pattern of RFI is not constant but there is always a "wide" signal and then "narrow" ones.

As Duane said, "Weird"...but interesting....John and Duane frequently "hear" stuff that I don't so they may have RFI for my days of None....bill....

?

;

Re: weird interference/noise

#13463

Good morning everyone...

Daune, I saw the same "stuff" here in Maine yesterday but, as John mentioned, this was not the first time and always in the late afternoon.

?

Re: weird interference/noise

#13462

开云体育

Hi Duane,

This is kind of neat.

Looks to me like the broadband noise is throwing the front end amplifier into saturation, causing it to go non-linear -- meaning that instead of amplifying faithfully, it has become a signal mixer.? It appears that the strong signals at ~19 & ~17 MHz are being mixed with each other and with the ROTHR sweepers, and with their aliases, and then mixed with some of those products to produce the chicken track looking artifacts every 1.5 MHz or so.
--
Dave

On 5/9/25 20:21, Duane via groups.io wrote:

Show quoted text

Howdy, caught some weird noise and/ or interference today.

The strange things we sometimes see.
~Duane

Re: weird interference/noise

#13461

Duane:

? ? ? I sometimes see something similar in the late afternoon. Right or wrong, I have attributed this to overload RFI. Interested in other opinions?

John

Show quoted text

On Friday, May 9, 2025, 8:21 PM, Duane via groups.io <duane919@...> wrote:

Howdy, caught some weird noise and/ or interference today.

The strange things we sometimes see.
~Duane

weird interference/noise

#13460

开云体育

Howdy, caught some weird noise and/ or interference today.

The strange things we sometimes see.
~Duane

Solar 8 MAY 2025

#13459

Observations from Grafton, WV.
Some weak solar today.
~Duane

250509101944Grafton-WV_WeakSolar.PNG

250509102343Grafton-WV_WeakSolar.PNG

250509190441Grafton-WV_WeakSolar.PNG

Re: solar events, 9 May 2025, Prospect, ME

#13458

Bill:

? ? ?Not much here.?Captured one bit of weak solar.?It was quite ratty. Elected not to post it. Thanks.

John

Show quoted text

On Friday, May 9, 2025, 7:22 PM, bsneed1 via groups.io <bsneed1@...> wrote:

Good evening. Very noisy here. Two spectrograms, the first very doubtful, the second not much better.

....bill....

?

solar events, 9 May 2025, Prospect, ME

#13457

Good evening. Very noisy here. Two spectrograms, the first very doubtful, the second not much better.

....bill....

?

250509140500Prospect.jpg

250509190529Prospect.jpg

Solar 8 MAY 2025

#13456

Observations from Grafton, WV.
Mostly weak solar today.

~Duane

250508065840Grafton-WV_MedSolar.PNG

250508102455Grafton-WV_WeakSolar.PNG

250508102655Grafton-WV_WeakSolar.PNG

250508191859Grafton-WV_WeakSolar.PNG

250508211334Grafton-WV_VeryWeakSolar.PNG

Re: Io-A May 08 2025 21-22 UT

#13455

2114 UT. Nice rolling Type III just happened.  Tom

Re: Io-A May 08 2025 21-22 UT

#13454

Thanks for the head's up, Tom.? Too much lightning in the area to see anything, I am afraid.

?

Richard

Re: Io-A May 08 2025 21-22 UT

#13453

Thanks Tom.

John

Show quoted text

On Thursday, May 8, 2025, 11:37 AM, Thomas Ashcraft <ashcraft@...> wrote:

Possible Io-A May 08 2025 21-22 UT. Center pass. It is a noisy time of
local day but Jupiter still
has a chance of passing through the ionosphere. - Tom in New Mexico

Io-A May 08 2025 21-22 UT

#13452

Possible Io-A May 08 2025 21-22 UT. Center pass. It is a noisy time of
local day but Jupiter still
has a chance of passing through the ionosphere. - Tom in New Mexico