and there go the Ursids!!!

[Wyvern]

Hi all,
Heat map and graph from the Ursid shower this year.
Looks like a steady increase in counts from 02.00UT until 09.00UT on the 22nd Dec is the maximum.
Hope you've all survived the "Christmas excesses" and best wishes to all for 2022.

[rsfoto]

Hi,

Interesting. Will need to check my data.

Which frequency are you scanning ?

[Montana]

Excellent!! if only it wasn't cloudy all the time and I could see the sky

Alexandra

[rsfoto]

Hi,

Interesting. Will need to check my data.

Which frequency are you scanning ?

I just saw in your signature you are using the Graves Radar located in France.

[Wyvern]

Excellent!! if only it wasn't cloudy all the time and I could see the sky

Alexandra

Oh dear, it's cloudy.... guess I'll listen to the meteors, ..... Oh dear, it's a Full Moon..... guess I'll listen to the meteors, .... Oh dear, the predicted maximum is around Midday..... guess I'll listen to the meteors, .... Oh dear, we've a power cut ....... bu**er.

Just remembered why I do the meteors by radio thing!!!
Regards to all,
Les

[Montana]

[Carbon60]

Same here, Les. Fed up of trying to 'see' any meteors myself, radio does the job perfectly well.

Here are my data including the Geminids and Ursids.

20211227_Geminids.jpg (139.79 KiB) Viewed 2330 times

Stu.

[rsfoto]

Hi,

Just played around with a Sheet processor and this came out for December

RMO_NHSA_12-2021_graph.JPG (124.99 KiB) Viewed 2327 times

[Carbon60]

Hi Rainer,
Interesting to see these double peaks. My understanding is that these can arise because of the way radio signal strength varies around the mast, which depends on the type of mast and directionality. As we rotate under the azimuth of the shower, the path of the incoming meteors relative to the direction between the transmitter and your antenna changes, as does the signal strength and, therefore, your ability to detect the meteors. Omnidirectional transmitters have a donut shaped power distribution, with minimal power emission directly overhead. Your data suggests this may be the case with your setup.

This is very interesting and informative. May I send your chart to the British Astronomical Association to compare with my own?

Thanks.

Stu.

[rsfoto]

May I send your chart to the British Astronomical Association to compare with my own?

Hi Stuart,

Sure, no problem. If you want I can send you the *.DAT file for December. For making the graph I just renamed into *.TXT

Interesting. My antenna is a 4 element Yagi for the frequency of 174.31 MHz which is the pilot frequency of the TV transmitters I am using. This is the RF channel 7 with a bandwidth from 174 to 180 MHz. I am also using a Bandpass filters which is tuned to a maximum bandwidth of about 12MHz and centered on 174.31 MHz. So I guess I have no other frequencies fooling around into my SDR.

The question is the following. You in Europe only have a single transmitter which is the Graves radar in France whereas I have 20 or 30 or even more TV stations transmitting this pilot frequency located in USA. There are no usable stations in Mexico.

The difference between the peaks is about 7-8 hours. In the RMOB website you can see that we here in Mexico are not the only ones with a double peak. There are some other stations with that peculiarity too.

... which depends on the type of mast and directionality ...

My antenna points at an Azimuth of 9° ( nearly North) and an Elevation of 12°and the mast is a 50mm PVC pipe.

RMO_Ehlert_Zapata_20211215.JPG (93.28 KiB) Viewed 2302 times

OP_Helical_BP_03_open.jpg (905.81 KiB) Viewed 2299 times

[marktownley]

Great data and informative thread thanks chaps!

[Carbon60]

Many thanks, Rainer.

The *.DAT file would be helpful. I’ll plot the data using my method to see how our results compare on that basis.

Much appreciated.

Stu.

[rsfoto]

Many thanks, Rainer.

The *.DAT file would be helpful. I’ll plot the data using my method to see how our results compare on that basis.

Much appreciated.

Stu.

Hi Stu,

Here you go

RMOB-202112.TXT

(12.32 KiB) Downloaded 75 times

Happy New Year 2022

[Carbon60]

Hi Rainer,
Please can you send me the raw data for Dec11th through 15th as captured using Spectrum Lab? This will enable me to plot every datapoint as I do with my own Spectrum lab data.

Thanks.

Stu.

[rsfoto]

Hi Rainer,
Please can you send me the raw data for Dec11th through 15th as captured using Spectrum Lab? This will enable me to plot every datapoint as I do with my own Spectrum lab data.

Thanks.

Stu.

Hi Stuart,

Here you go

[The extension rar has been deactivated and can no longer be displayed.]

Happy New Year 2022

Rainer

[Carbon60]

Many thanks, Rainer.

I've plotted out our data, as shown below.

20211227_Geminids_Rainer_Stuart.jpg (280.76 KiB) Viewed 2237 times

Generally the patterns are very similar, except for the double peaks in your data, which we think could be as a result of the shape of the transmitter EM field power distribution and there's a shift to the right, which presumably arises from your location being further to the west of me here in the UK. The other difference is that your setup seems to be more sensitive than mine with your counts being approximately double.

Les, I can do the same with your data if you send me the raw data from Spectrum Lab. It would make for an interesting comparison. Apologies if we've highjacked your original post.

Stu.

[rsfoto]

Hi Stuart,

Thanks and very interesting.

In regard to my double peaks take a look at the transmitters I am scanning. In Europe you have only one which is the dedicated Graves Radar with a frequency of 143.05 MHz.

Could this be a reason for my double peaks ?

I guess this can only be answered by real RMO experts ...

Meteor_Scatter_Pointing_20201018.JPG (578.52 KiB) Viewed 2231 times

[Carbon60]

Good point, Rainer. If you are receiving ‘pings’ from more than one transmitter, then it could explain both the double peaks and also, maybe, the higher apparent hourly rate.

As you suggest, a comment on these data from a RMO expert to explain our observations would be helpful.

Happy New Year.

Stu.

[rsfoto]

If you are receiving ‘pings’ from more than one transmitter, then it could explain both the double peaks and also, maybe, the higher apparent hourly rate.

Hi Stuart,

I do not think so as a station in the USA as I take as reference for comparing to my is from Stan Nelson and he scans the frequency of 54.310 MHz which is an old TV transmitter and from those there are just not more then 3 left in USA and he normally has always more pings then I do. Perhaps due to the lower frequency ?

Where do we find a RMO expert ?

Nelson

RMO_Nelson_20220101.JPG (41.33 KiB) Viewed 2204 times

Ehlert

RMO_Ehlert_20220101.JPG (39.88 KiB) Viewed 2204 times

[Carbon60]

Interesting, Rainer.

Does Nelson also see double peaks in his Geminid data?

Stu.

[rsfoto]

Interesting, Rainer.

Does Nelson also see double peaks in his Geminid data?

Stu.

Hi Stuart,

Good question but I do not have access to his data just the screenshot I made on December 14th and looking at his two graphs, yes it seems that he has double peak ...

RMO_Nelson_20211214.JPG (51.28 KiB) Viewed 2197 times

and below the two stations in my town Zapata and Ehlert

RMO_Zapata_20211214.JPG (49.57 KiB) Viewed 2197 times

RMO_Ehlert_20211214.JPG (49 KiB) Viewed 2197 times

[rsfoto]

Hi Stuart,

Will you some day join the RMOB website and put your pings in real time on the website ?

https://rmob.org/index.php

You just need to install Colorgramme and leave your computer running 24/7 ... It is quite easy and so even I did understand it how to do it

[rsfoto]

Hi Stuart,

Found the page for query of transmitter stations and RF channel 2 has 126 lines and RF channel 7 has 305 lines.

RF Channel 2 54MHZ to 60MHz Pilot frequency 54.310MHz

https://transition.fcc.gov/fcc-bin/tvq? ... W=W&size=9

RF Channel 7 174MHz to 180MHz Pilot frequency 174.310MHz

https://transition.fcc.gov/fcc-bin/tvq? ... W=W&size=9

Here the link https://www.fcc.gov/media/television/tv-query

Happy New Year 2022

[Carbon60]

Hi Stuart,

Will you some day join the RMOB website and put your pings in real time on the website ?

https://rmob.org/index.php

You just need to install Colorgramme and leave your computer running 24/7 ... It is quite easy and so even I did understand it how to do it

Hi Rainer,
I might do, although my dedicated PC isn’t currently set up to be online. Now we have direct fibre broadband to our home it’s a possibility.

Stu.

[rsfoto]

Hi Stuart,

Will you some day join the RMOB website and put your pings in real time on the website ?

https://rmob.org/index.php

You just need to install Colorgramme and leave your computer running 24/7 ... It is quite easy and so even I did understand it how to do it

Hi Rainer,
I might do, although my dedicated PC isn’t currently set up to be online. Now we have direct fibre broadband to our home it’s a possibility.

Stu.

Hi Stuart,

Hope to see you soon there

[Wyvern]

Hi all,
Been a tad hectic with work and home issues for a little while, so apologies for not replying to posts sooner.

Stuart - Will see what info is left on the laptop running my meteor detection setup. It's currently observing the Quadrantids, but I'll stop that on Saturday (8th). Am loath to "tamper" with it while it's working, just incase I upset it!!! I work Graves via "Echoes", not Spec Lab. I just can't get that programme to work for me. I hate it, it hates me, so Echoes it is. I may have saved the CSV file it generates but will check Saturday. Looking at my heat map for the Geminids, I'm showing a peak at 22.00UT on the 13th and a second some hours later at 01.00UT on the 14th. Don't know if this corresponds with your observations?....... and as for "hijacking" the original thread, no worries, you've turned it into a far more informative post than it originally was.
Regards to all,
Les