Radio Detected Leonids November 2020

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Carbon60
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Radio Detected Leonids November 2020

Post by Carbon60 » Fri Nov 20, 2020 7:43 am

Hi all,

Here are my reflected radio detections through November so far, which include the peak of the Leonid meteor shower (November 17th). The month began with the continuation of the tail of the Orionids which peaked in October. This was followed by a brief period of minimal activity (down to a sporadic event background count of 8-10/hr) before increasing slightly to and through the Leonid peak on the 17th.

The hourly rate for the Leonids isn't especially high (unlike the Perseids in August), reaching an additional 20 or so events per hour over and above the continual background sporadic events.
Leonids_November 2020.jpg
Leonids_November 2020.jpg (168.58 KiB) Viewed 72 times
Though not strictly solar data, or space weather, I suppose it could be argued that the relationship with the Sun here is gravitational :)

Thanks for looking and I hope you find this interesting.

Stu.


H-alpha, WL and Ca II K imaging kit for various image scales.
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Re: Radio Detected Leonids November 2020

Post by Montana » Fri Nov 20, 2020 8:07 am

Always lovely to see Stuart, I guess it is Spaceweather as these debris fields are from the Sun tearing apart comets :)

Great work :hamster: I always expected the peaks to be much larger, where are the ones where they say up to 100-150 per hour?

Alexandra



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Re: Radio Detected Leonids November 2020

Post by rsfoto » Fri Nov 20, 2020 4:18 pm

Hi,

Well done Stu.

@Alexandra

Well I do not know if it is true :o but if you look at my statistics I have had up to 637 echoes in one hour and comparing with the non echo hours well looks like some logic is in there ... Still working on that and I will need a second station far away from my site to corroborate this values.

Lot of meteor chasers will say impossible but how comes that I have peaks up to 600 or more and on the other side I have low values as 10 echoes per hour and looking at the colorgram it is quite stable ...

If you look at the colorgram you cans ee the peaks are around 2 to 5 o'clock in the morning local time which is when according to the experts one gets the echoes due to the earth orientation against the flying direction of the earth.

Maybe Stu has an explanation for it :?

RMO_112020.jpg
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RMO_112020_RMOB_file.JPG
RMO_112020_RMOB_file.JPG (235.04 KiB) Viewed 63 times


regards Rainer

Observatorio Real de 14 San Luis Potosi Mexico

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Re: Radio Detected Leonids November 2020

Post by Carbon60 » Sat Nov 21, 2020 7:30 am

Montana wrote:
Fri Nov 20, 2020 8:07 am
Always lovely to see Stuart, I guess it is Spaceweather as these debris fields are from the Sun tearing apart comets :)

Great work :hamster: I always expected the peaks to be much larger, where are the ones where they say up to 100-150 per hour?

Alexandra
Thank you, Alexandra.

I understand the Leonid count is always relatively low at around 20 per hour. The Geminids in December should be more impressive.

I understand that the high values you’ve quoted are ‘corrected’ Zenith Hourly Rate values, based on applying factors that take into account the impact of location and sky conditions on actual observation values. It’s an attempt to try to normalise the results from multiple observers.

I’m unsure how radio detections are treated in this regard. Looking at data from around the world, everyone obtains wildly different results depending on their equipment, the radio frequency and transmitter location and local ‘electromagnetic’ environment (secondary) reflections, interference, noise and so on. For example, Rainer’s data are substantially different to mine in terms of number of detections.

Maybe someone reading this can offer some insight on this. :)

Stu.


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Re: Radio Detected Leonids November 2020

Post by Carbon60 » Sat Nov 21, 2020 8:24 am

@ Rainer,

You must be getting multiple reflections, or signals from more than one transmitter, maybe? What do the individual events look like? Does a single ‘event’ produce multiple counts?

Nice data though. You’ve certainly captured the peak of the shower, despite the very high numbers.

Stu.

Stu.


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Re: Radio Detected Leonids November 2020

Post by rsfoto » Sat Nov 21, 2020 6:56 pm

Hi Stu,
You must be getting multiple reflections, or signals from more than one transmitter, maybe? What do the individual events look like? Does a single ‘event’ produce multiple counts?
This could be well the reason. Look at the coverage of my 4 Element DIY YAGI antena for 174.31 MHz. At 3dB power it covers 58°. Look how many transmitters with 174.31 MHz frquency are in there.

NHSA_RMO_Meteor_Scatter_Coverage.jpg
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Antenna coverage at 3 dB power [little red circle] to one side and the same to the other side.

NHSA_DIY_4_Element_YAGI_174.31_MHz_Coverage.JPG
NHSA_DIY_4_Element_YAGI_174.31_MHz_Coverage.JPG (186.01 KiB) Viewed 36 times


regards Rainer

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Re: Radio Detected Leonids November 2020

Post by Wyvern » Sun Nov 22, 2020 7:07 pm

Hi all,
For what it's worth, here are my Leonid results over the maximum period.
Mini peak on the 16th around 0500-06.00 GMT then a general rise in pings on the 17th from 02.00-04.00 GMT and an "interesting" peak at 08.00-09.00 GMT on the 17th.
Regards,
Les
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Leonids 2020  Numbers.jpg
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Re: Radio Detected Leonids November 2020

Post by Carbon60 » Mon Nov 23, 2020 5:35 pm

Many thanks, Les. Good information.

Stu.


H-alpha, WL and Ca II K imaging kit for various image scales.
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Re: Radio Detected Leonids November 2020

Post by Carbon60 » Mon Nov 23, 2020 5:46 pm

rsfoto wrote:
Sat Nov 21, 2020 6:56 pm
Hi Stu,
You must be getting multiple reflections, or signals from more than one transmitter, maybe? What do the individual events look like? Does a single ‘event’ produce multiple counts?
This could be well the reason. Look at the coverage of my 4 Element DIY YAGI antena for 174.31 MHz. At 3dB power it covers 58°. Look how many transmitters with 174.31 MHz frquency are in there.


NHSA_RMO_Meteor_Scatter_Coverage.jpg


Antenna coverage at 3 dB power [little red circle] to one side and the same to the other side.



NHSA_DIY_4_Element_YAGI_174.31_MHz_Coverage.JPG
Hi Rainer,

This looks likely to be the issue. Your data show a clear (and correct) pattern, it’s just the numbers are too high. Maybe just normalise by dividing by a factor to account for the multiple radio sources.

Stu.


H-alpha, WL and Ca II K imaging kit for various image scales.
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/

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Re: Radio Detected Leonids November 2020

Post by rsfoto » Mon Nov 23, 2020 6:41 pm

Hi Stu,

Thanks for the suggestion. On the other side I have sometimes just 1 or 2 echoes per hour ;) Will analyze what I do with this.

Eventually I will built a Moxon for 76.31 MHz (size is acceptable = 141 cm x 52 cm rectangle) as there is only one strong transmitter in USA and see what happens with that.


regards Rainer

Observatorio Real de 14 San Luis Potosi Mexico

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Re: Radio Detected Leonids November 2020

Post by Carbon60 » Mon Nov 23, 2020 7:26 pm

Sounds like a cool plan, Rainer. :)


H-alpha, WL and Ca II K imaging kit for various image scales.
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/

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