Re: Detecting Massive X-Class & M-Class flares on 14 May 2025 using Sudden Ionospheric Disturbance monitor at Lichfield Radio Observatory UK
Your traces are excellent – I might give that a try too
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From: [email protected] <[email protected]>
On Behalf Of Mark Edwards via groups.io
Sent: 22 May 2025 22:22
To: [email protected]
Subject: Re: [baa-rag] Detecting Massive X-Class & M-Class flares on 14 May 2025 using Sudden Ionospheric Disturbance monitor at Lichfield Radio Observatory UK
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Andrew,
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I don't use any VLF receivers, all I do is connect a loop aerial (a 5m length of old SCART cable) to the microphone input of a PC
and use that as the input to SpectrumLab. That way I can monitor many freqs. at once rather than
use a single dedicated receiver.
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Transmitters often go off air or change frequency so it's easy in Spectrum lab to change the watch list when that happens.
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Mark
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Re: Detecting Massive X-Class & M-Class flares on 14 May 2025 using Sudden Ionospheric Disturbance monitor at Lichfield Radio Observatory UK
Andrew,
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I don't use any VLF receivers, all I do is
connect a loop aerial (a 5m length of old SCART cable) to the microphone input
of a PC
and use that as the input to SpectrumLab.
That way I can monitor many freqs. at once rather than
use a single dedicated receiver.
?
Transmitters often go off air or change
frequency so it's easy in Spectrum lab to change the watch list when that
happens.
?
Mark
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Re: Detecting Massive X-Class & M-Class flares on 14 May 2025 using Sudden Ionospheric Disturbance monitor at Lichfield Radio Observatory UK
Thanks Mark.
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Are you using the UKRAA VLF receivers?
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I am using one set at 23.4 KHz – are you doing the same? And if so how are you getting the output into Spectrum Lab?
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Mine is an old version with parallel port so I am taking the analogue output from the VLF receiver, putting it through a Labjack U3 and bringing
it into Radio Sky Pipe II currently.
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Andy
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From: [email protected] <[email protected]>
On Behalf Of Mark Edwards via groups.io
Sent: 21 May 2025 15:11
To: [email protected]
Subject: Re: [baa-rag] Detecting Massive X-Class & M-Class flares on 14 May 2025 using Sudden Ionospheric Disturbance monitor at Lichfield Radio Observatory UK
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Andy,
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You set up a watch list for the plotter like this:-
For each of the monitored freqs. in the 'Expression' I average over a bandwidth of 150Hz to try to cover the sidebands.
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My averaging over 60 FFTs amounts to about 5s.
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Mark
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Re: Detecting Massive X-Class & M-Class flares on 14 May 2025 using Sudden Ionospheric Disturbance monitor at Lichfield Radio Observatory UK
Andy,
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You set up a watch list for the plotter
like this:-
For each of the monitored freqs. in the 'Expression'
I average over a bandwidth of 150Hz to try to cover the sidebands.
?
My averaging over 60 FFTs amounts to about
5s.
?
Mark
?
?
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Re: SID monitoring recording on Radio Sky Pipe II
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From: [email protected] <[email protected]>
On Behalf Of Alan Melia via groups.io
Sent: 20 May 2025 23:33
To: [email protected]
Subject: Re: [baa-rag] SID monitoring recording on Radio Sky Pipe II
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Andy analogue filtering needs to be quite slow to remove that kind of noise. In the 2000s I was doing similar recording on 136kHz, and most of the noise was distant lightning. I chose to take 6 readings at 2
sec intervals and only save the lowest which became the reading for the mid point of the 6 readings. This was based on the idea that there may be gaps between the strikes. However ideally the filtering before digitisation should not be too narrow because that
will spread the width of the pulses. This is not usually provided as a filter so you may need to experiment with you receiver and software to use it. I found RSP only provided averaging which is not the best solution.
Best Wishes
Alan G3NYK
On 20/05/2025 22:08, Andrew Thornett via groups.io wrote:
Does anyone else use Radio Sky Pipe for recording output of UKRAA SID monitors? If so, how long an integration time do you use? I was using 5 seconds but still quite noisy. Should I use 10 secs or even 30 secs?
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Andy
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Re: SID monitoring recording on Radio Sky Pipe II
Andy analogue filtering needs to be quite slow to remove that kind
of noise. In the 2000s I was doing similar recording on 136kHz, and
most of the noise was distant lightning. I chose to take 6 readings
at 2 sec intervals and only save the lowest which became the reading
for the mid point of the 6 readings. This was based on the idea that
there may be gaps between the strikes. However ideally the filtering
before digitisation should not be too narrow because that will
spread the width of the pulses. This is not usually provided as a
filter so you may need to experiment with you receiver and software
to use it. I found RSP only provided averaging which is not the best
solution.
Best Wishes
Alan G3NYK
On 20/05/2025 22:08, Andrew Thornett
via groups.io wrote:
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Does anyone else use Radio Sky Pipe for
recording output of UKRAA SID monitors? If so, how long an
integration time do you use? I was using 5 seconds but still
quite noisy. Should I use 10 secs or even 30 secs?
?
Andy
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SID monitoring recording on Radio Sky Pipe II
Does anyone else use Radio Sky Pipe for recording output of UKRAA SID monitors? If so, how long an integration time do you use? I was using 5 seconds but still quite noisy. Should I use 10 secs or even 30 secs?
?
Andy
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Re: Detecting Massive X-Class & M-Class flares on 14 May 2025 using Sudden Ionospheric Disturbance monitor at Lichfield Radio Observatory UK
Dear Mark,
This is a bit embarrassing – I just looked back at my SID computer and I did wonder where this FFT settings came from – I use Radio Sky Pipe to record
my data hence why I can’t find it! How do you use Spectrum Lab to record SID graphs? I have only every used it for 2D and 3D waterfalls for my meteor detection system.
Andy
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From: [email protected] <[email protected]>
On Behalf Of Andrew Thornett via groups.io
Sent: 20 May 2025 08:28
To: [email protected]
Subject: Re: [baa-rag] Detecting Massive X-Class & M-Class flares on 14 May 2025 using Sudden Ionospheric Disturbance monitor at Lichfield Radio Observatory UK
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Your plot looks marvellous! I will see if I can work out how to average 60 FFTs as you have done
Here's my plot at 23.4kHz.
I set spectrumlab to average over 60 FFTs to reduce the noise level,
which seems to work well.
Mark
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Re: Detecting Massive X-Class & M-Class flares on 14 May 2025 using Sudden Ionospheric Disturbance monitor at Lichfield Radio Observatory UK
I use an ancient version of SpectrumLab,
but from what I see the latest version still
has an 'FFT output internal average (#FFTs)'
option in the 'FFT settings' window.
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The window is shown here: https://hamsci.org/spectrum-lab-solar-eclipse-instructions-page
Don't use these values though!
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Mark
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Re: Detecting Massive X-Class & M-Class flares on 14 May 2025 using Sudden Ionospheric Disturbance monitor at Lichfield Radio Observatory UK
Your plot looks marvellous! I will see if I can work out how to average 60 FFTs as you have done
Sent from
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Here's my plot at 23.4kHz.
I set spectrumlab to average over 60 FFTs to reduce the noise level,
which seems to work well.
Mark
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Re: Detecting Massive X-Class & M-Class flares on 14 May 2025 using Sudden Ionospheric Disturbance monitor at Lichfield Radio Observatory UK
Here's my plot at 23.4kHz.
I set spectrumlab to average over 60 FFTs to reduce the noise level,
which seems to work well.
Mark
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Detecting Massive X-Class & M-Class flares on 14 May 2025 using Sudden Ionospheric Disturbance monitor at Lichfield Radio Observatory UK
Detecting X-Class & M-Class flares on 14 May 2025 using Sudden Ionospheric Disturbance monitor at Lichfield Radio Observatory (my house!):
My data = red & noisy..
Comparison data = purple, SID Monitoring Station, (not my data, which you can tell because it is a lot less noisy!)
Andy
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Thanks Andy for the vote of confidence.? The UKRAA team are very pleased with this new detector; the result of a years development.? The Raspberry Pi data visualization software and the Pi web-server software is an on going development and will be added to with additional features.? If any one has muon data from any detector please send to John Cook for inclusion in the BAA RA Section monthly report.? Long term muon flux measurements will be particularly interesting.? If anyone wants to start a project to corelate lightening events with muon flux please have a go.? There are Universities exploring this and may be interested in your results.
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The Pico muon detector will be demonstrated at EuCARA 25 () in September.? We would live to see you in person..!?
--
???? Paul Hearn? ???? ? paul@...? ???? ?RA Section Director? ???
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Hi Paul & rest of UKRAA team,
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I REALLY like the PicoMuon detector! Very nice! Great improvement on CosmicWatch ones. Thanks for all your efforts on creating such a wonderful instrument, and for all the time you volunteer free-of-charge to this and other projects – it
is great appreciated!!
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Andy
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Re: Strange SID 20th April
Hello Mark,
??? ??? Do you have timings for this, as they were not in the
report that you sent earlier?
Thanks,
John.
On 22/04/2025 09:29, Mark Edwards wrote:
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Thanks for the
charts.
It certainly looks as
though something
disturbed the ionosphere at that time, but what caused it
is the question.
It was just before
sunset for the paths to
Anthorn and Skelton, but after sunset for 23.4kHz.
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The C4.3 flare at
17:18 shows up well on
Paul's chart as it does on mine so I would have expected
something
of similar intensity
to cause the bump at
19:00. Whether the much larger disturbance at 19.6 and
22.1 was a coincidence
or an indication of
its source is another
question.
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Mark
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Re: Meteor echo of the day.
A pretty busy 30 s or so.?
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Re: Meteor echo of the day.
Hello Mike
The period covered by the screenshots is 06:48:20 to 06:50:15. The
time stamp on each screen is when the screen was grabbed and the
screen shows about one minute of data . I couldn't stop to grab
another screenshot as I was on my way out of the house at the time.
Brian
On 03/05/2025 14:59, Mike German via
groups.io wrote:
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I seem to have captured the same meteoroid using the
GRAVEStransmitter.? At the higher frequency the event lasted
just over a minute.? Similar broad bands in the specular scatter
trail and there is the same evidence of the "head echo"
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Mike
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Re: Meteor echo of the day.
I seem to have captured the same meteoroid using the GRAVEStransmitter.? At the higher frequency the event lasted just over a minute.? Similar broad bands in the specular scatter trail and there is the same evidence of the "head echo"
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Mike
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Here are two screenshots showing reflections lasting just under two minutes.? Some might? call this sporadic E but a meteor head echo was clearly seen by the NW Hampshire receivers on the first screenshot timed at 06:49:20 showing that whatever it was it was triggered by the passage of a meteor.
Do take a look at the live streams at . Also if you would like to work on the full bandwidth data there are some GBytes of recordings available to download at :-
Brian
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Re: RAZoom Friday 2nd May 19:30 BST (18:30 UTC) - Binary Stars - Dr. Noel Castro-Segura
Ignore that – just found link!
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From: Andrew Thornett
Sent: 01 May 2025 17:27
To: '[email protected]' <[email protected]>
Subject: RE: [baa-rag] RAZoom Friday 2nd May 19:30 BST (18:30 UTC) - Binary Stars - Dr. Noel Castro-Segura
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Hi Paul
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I don’t seem to have received a link for tomorrow’s meeting this time.
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Andy
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On Tue, Apr 29, 2025 at 06:24 AM, Paul Hearn wrote:
The link for this has been sent out.
If you are not on the distribution list please contact me, if you wish to attend.
???? Paul Hearn? ???? ?paul@...??? ?RA Section Director? ???
?
 Paul
Hearn Group Owner
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- Send from group owner address
- Send from your address
Re: RAZoom Friday 2nd May 19:30 BST (18:30 UTC) - Binary Stars - Dr. Noel Castro-Segura
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