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Re: UKRAA volunteers
Thanks Martyn, I'll contact you tomorrow... Sent from -- ???? Paul Hearn? ???? ?paul@...? ???? ?RA Section Director? ??? |
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UKRAA volunteers
As yo may know UKRAA is run by volunteers, currently we are looking for a someone make a simple edit to a DFX file.? If you have the skill and the time please contact Paul Hearn for the detail of what we need - thank you.
-- ???? Paul Hearn? ???? ?paul@...? ???? ?RA Section Director? ??? |
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Re: Wishing you all a Very Merry Christmas!
Dear Colleagues, Merry Christmas and a better 2024 with Peace, health and Hope ! José de Almeida //  P Please consider the environment before printing this document ???????? Jose' de Almeida? -? Cascais - PORTUGAL ? --------------------------------------------------------------------
On Sunday, December 24, 2023 at 10:26:00 PM GMT, Andrew Thornett via groups.io <andrew@...> wrote:
And a wonderful New Year for 2024,
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Re: Muon Detector Rate
开云体育Thanks David. The response below has just come through from Dr Axani of CosmicWatch and might interest you. Andy ? Thanks to those who’ve sent responses to my queries re rates – the following has just come through from Spencer Axani of CosmicWatch: Andy ? Hi Andrew, ? The master detector should see roughly 1.2+/-0.3 Hz, and the coincidence detector rate depends on how you have them setup. If the detectors are setup such that the two scintillator slabs are touching, the coincidence rate should be ~0.4Hz. If they are in their respective cases, sitting one-on-top another, the rate should be roughly 0.15 (if my memory is correct). The longitudinal/latitude effect only causes percent level changes at sea level. ? Are you showing the rate from the coincidence detector? Perhaps you have the detectors spaced further apart? ? Best, ? Spencer ?? Dr. Spencer N. Axani ? And about my personal setup: ? Looks good! Those rates look about right. ? ─ Dr. Spencer N. Axani ? ? From: [email protected] <[email protected]>
On Behalf Of David Farn via groups.io
Sent: 23 December 2023 15:59 To: [email protected] Subject: Re: [baa-rag] Muon Detector Rate ? Andy, I did a quick and dirty calculation on a short file produced by my CRD. I am probably getting a rate of about 0.04 events/second, which is a bit less than I expected, but that rate has been consistent since 2020 when I first started capturing data. My detector is Geiger tube based and I would expect it to be less efficient than a scintillator detector. Another big difference is the coincidence detector. I use high speed logic and the coincidence window of my detector is about 25ns compared to the 30us window of your detector. My muons only travel 7.5m in that time, still much bigger that the 60mm gap between the sensors planes. I would hope that although my detection rate is lower, the certainty of a genuine event is much better. The data is bursty, muons come in showers, so I need to do some more work on this measurement to get a better average. ? If I just do a monthly plot of the data :- ? ? ? By eye it looks like the rate is more like 2.5 events per 10s sample period. This equates to 0.25 events per second, different to my first rough calculation. But I suspect that the plot fills a lot of gaps and is not the right answer. Because the files are quite large I find simply importing to a spreadsheet a real pain. I need to write a bit of Python to do the job properly. ? I would think that you are probably not far from the correct rate with your instrument. Do the CosmicWatch rates take into account the height above sea level ? ? David ? ? ? ? From:
[email protected] On Behalf Of Andrew Thornett via groups.io ? Hi All, When I first got my muon detectors from UKRAA few weeks back I seemed to be getting 1.5 muons per second, although I am uncertain now whether I had properly set up coincidence mode. Now I am getting in coincidence mode 0.120 detections per second – that seems a lot less than quoted 0.5-1.0 detections/second quoted on CosmicWatch website. Can I ask what other folks are getting? Do I have a problem?!! Andy ?
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Re: Muon Detector Rate
开云体育Andy, I did a quick and dirty calculation on a short file produced by my CRD. I am probably getting a rate of about 0.04 events/second, which is a bit less than I expected, but that rate has been consistent since 2020 when I first started capturing data. My detector is Geiger tube based and I would expect it to be less efficient than a scintillator detector. Another big difference is the coincidence detector. I use high speed logic and the coincidence window of my detector is about 25ns compared to the 30us window of your detector. My muons only travel 7.5m in that time, still much bigger that the 60mm gap between the sensors planes. I would hope that although my detection rate is lower, the certainty of a genuine event is much better. The data is bursty, muons come in showers, so I need to do some more work on this measurement to get a better average. ? If I just do a monthly plot of the data :- ? ? ? By eye it looks like the rate is more like 2.5 events per 10s sample period. This equates to 0.25 events per second, different to my first rough calculation. But I suspect that the plot fills a lot of gaps and is not the right answer. Because the files are quite large I find simply importing to a spreadsheet a real pain. I need to write a bit of Python to do the job properly. ? I would think that you are probably not far from the correct rate with your instrument. Do the CosmicWatch rates take into account the height above sea level ? ? David ? ?
? From: [email protected] On Behalf Of Andrew Thornett via groups.io
Sent: Friday, December 22, 2023 11:11 PM To: [email protected]; [email protected]; Andrew Thomas <andrew.thomas@...> Subject: [baa-rag] Muon Detector Rate ? Hi All, When I first got my muon detectors from UKRAA few weeks back I seemed to be getting 1.5 muons per second, although I am uncertain now whether I had properly set up coincidence mode. Now I am getting in coincidence mode 0.120 detections per second – that seems a lot less than quoted 0.5-1.0 detections/second quoted on CosmicWatch website. Can I ask what other folks are getting? Do I have a problem?!! Andy ?
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Re: Geminids
Hi John Your capture is very interesting - it's a long time since I have seen such a long period of reflection. This is unlikely to be just a meteor trail AFAIK. It will likely be a meteor trail creating a patch of sporadic E ionisation which carries on reflecting the signal long after the original seed trail has gone.? Tony? On Tue, 19 Dec 2023, 13:34 John Desmond via , <ei7gl=[email protected]> wrote:
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Re: Geminids
Tony/Brian
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Thanks for the info and link.
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I had a listen this morning and I compared my reception to the receiver at the Norman Lockyer Observatory at Sidmouth. I caught one nice meteor scatter burst at 08:53 UTC which was about 45 seconds long.
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The image on the left is from online receiver in Sidmouth and the image on the right is of my SpectrumLab display which is moving vertically at about a third of the speed.?The caveat of course is that maybe there were two separate meteor bursts at the same time but it would be some coincidence considering the low number of long bursts I receive.
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There is about a 49 degree difference in heading from GB3MBA to Sidmouth and Cork so it's encouraging to see that signals don't seem to be restricted to a very narrow corridor for the 300-500km paths.?It'll be interesting to do some tests when Armagh goes live which will be 383kms at 293 degrees.
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Just one thought... It would be useful if the remote receivers on the page were grouped by area. Maybe put all of the receivers to the west of the beacon on the left, the receivers to the east on the right and so on. It might make comparing traces a bit easier.
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John |
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Re: Geminids
Hi John Your write-up on your blog site is really good - thank you. As I am only 60km away from the beacon, it is great to see the lack of aircraft trails and direct carrier?on your images.? They make using Spectrum Lab very difficult for automatic recording. In the initial trials?of the beacon when it was being tested in the south of England during the 2021 Geminids, I was able to get a plot over the peak of the shower with my 4 element 6 meter yagi and an Icom 7100 in Leicester with a script in Spectrum Lab. So it is interesting to compare. Tony On Mon, 18 Dec 2023 at 12:24, Brian <brian@...> wrote:
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Re: Geminids
开云体育Hello John Great to hear that you're using GB3MBA .. makes all the work worthwhile !? The network of receivers can be viewed at . There are only 3 receivers in the network at the moment but we hope to add a fourth located near the Armagh Observatory? soon and another in Scotland when we have a suitable location. The echoes are quite directional so not all receivers see the same echoes so observations from different places are of great interest. All the best Brian On 18/12/2023 10:36, John Desmond via
groups.io wrote:
Hi all |
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Re: Geminids
Hi all
I'm new to this group but I'd just like to say congrats to the team that put GB3MBA on the air, I'm getting some good pings and bursts from it here 500kms away on the south coast of Ireland. I recently used it to find the peak of the Geminid meteor shower...?How I used the 50 MHz GB3MBA propagation beacon to find the peak of the 2023 Geminid meteor shower... |
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Re: Interesting magnetometer trace
开云体育Thanks John - - To Everybody, is there any good source of information on what types of changes I might see in my magnetometer readings and why generally? I have only got this working very recently? Andy ? From: [email protected] <[email protected]>
On Behalf Of John Cook via groups.io
Sent: 17 December 2023 08:44 To: [email protected] Subject: Re: [baa-rag] Interesting magnetometer trace ? Hello,
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Re: Interesting magnetometer trace
开云体育Hello,
??? ??? Nothing seen on my single axis sensor here in Wolverhampton. Judging by the time axis, it does seem a slow rise time, so unusual for interference. My biggest problem is from traffic parking in the road outside, but the signal changes in less that a minute. John. On 16/12/2023 20:58, Andrew Thornett via groups.io wrote:
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Re: Interesting magnetometer trace
开云体育Thanks for sharing your plot – not that I was aware of. Andy ? From: [email protected] <[email protected]>
On Behalf Of callum_potter via groups.io
Sent: 16 December 2023 20:29 To: [email protected] Subject: Re: [baa-rag] Interesting magnetometer trace ? Hi Andy, ? not seen anything?particularly unusual around then today - maybe some local interference? ? Here's my plot for today so far. ? Callum ? On Sat, Dec 16, 2023 at 6:45?PM Andrew Thornett via <andrew=[email protected]> wrote:
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Paul Hearn
Jose' de Almeida
