Re: UK meteor scatter system and Wind profiling radar
Hi Mike,
?
I'm not a specialist on the subject, but searching though the archived data may be of some help.
?
?
?
I'd suggest emailing this guy, who used to be responsible for the facility, and who apears to be quite approachable.
?
?
Regards,
?
Martin
?
?
On Fri, Aug 16, 2024 at 01:33 PM, Mike German wrote:
In your searches Martin did you find any data on wind profile data - wind speed, direction altitude.? I am interested fin wind effects distorting meteoroid ionisatioin trails and in my rudimentary search found? nothing.
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Re: UK meteor scatter system and Wind profiling radar
Hello David
The existing 6 screen live display at
should provide some
indication of wind speed at the altitude of the ionisation using
the Doppler shift of the "Tail Echoes" .? The Beacon frequency is
locked to GPS as are all the receivers ( except possibly Malvern
). The display currently displays +/- 100Hz with 20Hz markers on
the bottom scale.
We are working towards finding a location fro a receiver for
Scotland which would improve the reflection geometry. The full
receiver bandwidth including precision timing is streamed to the
project server and will be available for anyone wishing to use it
to study meteors or wind when the necessary software can be
completed.
Some of the echoes seen during the Perseids show substantial
spreads of Doppler shifts of their tail echoes . It would be
interesting to more fully understand what is going on. In this
image three of the receivers are at the same location NW,
Hampshire. The Test stream is from a receiver with it's antenna
pointing straight UP and end-on to the beacon from NW Hampshire
Brian.
 such as this example.
On 16/08/2024 12:33, David Farn via
groups.io wrote:
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Interesting
Martin,
I
can hear the station just on the noise threshold of my Rx
most of the time. Antenna is a dipole in the loft, so very
poor. QTH Coventry, not that far from the Tx.
?
Cheers
David
?
?
From: [email protected] On Behalf Of Martin
via groups.io
Sent: Thursday, August 15, 2024 10:18 PM
To: [email protected]
Subject: Re: [baa-rag] UK meteor scatter system and
Wind profiling radar
?
The system on 46.4MHz located at Waltham
on the Wold is just transmitting with no outstations
reporting back. So it is effectively just burning
electricity.
My guess is it will continue to run until
a legacy contract ends, and then it will be turned off. If
it was just turned off before such a date, it could be
considered a breech of contract, with much greater financial
implications than accepting regular income, and using part
if it to pay the electricity bill.
All the other technical details were in
my initial post.
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Re: UK meteor scatter system and Wind profiling radar
In your searches Martin did you find any data on wind profile data - wind speed, direction altitude.? I am interested fin wind effects distorting meteoroid ionisatioin trails and in my rudimentary search found? nothing.
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Re: UK meteor scatter system and Wind profiling radar
Interesting Martin, I can hear the station just on the noise threshold of my Rx most of the time. Antenna is a dipole in the loft, so very poor. QTH Coventry, not that far from the Tx. ? Cheers David ? ?
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From: [email protected] On Behalf Of Martin via groups.io
Sent: Thursday, August 15, 2024 10:18 PM
To: [email protected]
Subject: Re: [baa-rag] UK meteor scatter system and Wind profiling radar? The system on 46.4MHz located at Waltham on the Wold is just transmitting with no outstations reporting back. So it is effectively just burning electricity. My guess is it will continue to run until a legacy contract ends, and then it will be turned off. If it was just turned off before such a date, it could be considered a breech of contract, with much greater financial implications than accepting regular income, and using part if it to pay the electricity bill. All the other technical details were in my initial post.
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Re: UK meteor scatter system and Wind profiling radar
The system on 46.4MHz located at Waltham on the Wold is just transmitting with no outstations reporting back. So it is effectively just burning electricity.
?
My guess is it will continue to run until a legacy contract ends, and then it will be turned off. If it was just turned off before such a date, it could be considered a breech of contract, with much greater financial implications than accepting regular income, and using part if it to pay the electricity bill.
?
All the other technical details were in my initial post.
?
Regards,
?
Martin
?
?
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Re: UK meteor scatter system and Wind profiling radar
The sound at 46.400MHz attached.
Is this system in use or is it just burning electricity ?
Brian
On 15/08/2024 14:17, Martin via
groups.io wrote:
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Slightly off-topic, but this may be of general interest.
?
I recently performed a bit more investigation, regarding
the UK meteor scatter system and Wind profiling radar that
operate around 46MHz.
?
I wrote to the meteor scatter system operating company, and
received a lot of useful information.
?
The site I originally found many years ago in Oxfordshire, no
longer exists, and despite me thinking it was still operating
somewhere in the area, it is not.
?
The Meteor Burst radio networks are now considered to be
legacy systems.
?
They hold three frequencies for use of Meteor Burst:
?
? ? 46.400MHz
? ? 46.950MHz
? ? 49.750MHz
?
A station at Stanmore, North of London, was the main master
station from 1988 to 2014 and broadcast on 46.975 and 46.4,
however this station was decommissioned in 2014.
?
There are only two Meteor Master Stations still remaining in
the UK:
?
Bacton, Norfolk - Master station. This operates on 46.975 /
46.95 and has antennae which are orientated NE to cover the
Southern North Sea. This is most likely the station which is
being picked up in Europe. The antennae are vertical 3 element
Yagis
?
I think this is the tower with the antennas as seen on Google
Streetview.
?
?
Waltham on the Wolds, Leicestershire - This operates on 46.4
but is defunct. The transmitter is still operating, but there
are no outstations currently reporting in. The antennae are
orientated NW and SW and are vertically orientated 3 element
Yagis.
?
I think this is the tower with two views of the separate
antennas as seen on Google Streetview.
?
?
?
Basically the master station polls on 46.975 generally at 30mS
or so, the outstations respond on 46.950 when they have
something to say.
?
The master stations are transmitting at 500W whilst the
outstations are only 100W.
?
I also checked the University of Wales website, and the
46.5MHz (46.4 & 46.95MHz) MST radar near Aberystwyth seems
to have been switched off sometime in 2024.
?
?
I wonder what they intend to do with the antenna system ?
?
Regards,
?
Martin
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Re: UK meteor scatter system and Wind profiling radar
Hello Martin
Thanks for the info.? I took a look on some of those frequencies
but so far the only one I received anything on was 46.400 which
had some kind of pulsed transmission. It was fairly strong on a
vertical antenna while on the horizontal beam which was not tuned
to 46MHz so could mislead, it seemed to peak to the east of my
location in NW Hampshire.
Regards
Brian
On 15/08/2024 14:17, Martin via
groups.io wrote:
toggle quoted message
Show quoted text
Slightly off-topic, but this may be of general interest.
?
I recently performed a bit more investigation, regarding
the UK meteor scatter system and Wind profiling radar that
operate around 46MHz.
?
I wrote to the meteor scatter system operating company, and
received a lot of useful information.
?
The site I originally found many years ago in Oxfordshire, no
longer exists, and despite me thinking it was still operating
somewhere in the area, it is not.
?
The Meteor Burst radio networks are now considered to be
legacy systems.
?
They hold three frequencies for use of Meteor Burst:
?
? ? 46.400MHz
? ? 46.950MHz
? ? 49.750MHz
?
A station at Stanmore, North of London, was the main master
station from 1988 to 2014 and broadcast on 46.975 and 46.4,
however this station was decommissioned in 2014.
?
There are only two Meteor Master Stations still remaining in
the UK:
?
Bacton, Norfolk - Master station. This operates on 46.975 /
46.95 and has antennae which are orientated NE to cover the
Southern North Sea. This is most likely the station which is
being picked up in Europe. The antennae are vertical 3 element
Yagis
?
I think this is the tower with the antennas as seen on Google
Streetview.
?
?
Waltham on the Wolds, Leicestershire - This operates on 46.4
but is defunct. The transmitter is still operating, but there
are no outstations currently reporting in. The antennae are
orientated NW and SW and are vertically orientated 3 element
Yagis.
?
I think this is the tower with two views of the separate
antennas as seen on Google Streetview.
?
?
?
Basically the master station polls on 46.975 generally at 30mS
or so, the outstations respond on 46.950 when they have
something to say.
?
The master stations are transmitting at 500W whilst the
outstations are only 100W.
?
I also checked the University of Wales website, and the
46.5MHz (46.4 & 46.95MHz) MST radar near Aberystwyth seems
to have been switched off sometime in 2024.
?
?
I wonder what they intend to do with the antenna system ?
?
Regards,
?
Martin
|
UK meteor scatter system and Wind profiling radar
Slightly off-topic, but this may be of general interest.
?
I recently performed a bit more investigation, regarding the UK meteor scatter system and Wind profiling radar that operate around 46MHz.
?
I wrote to the meteor scatter system operating company, and received a lot of useful information.
?
The site I originally found many years ago in Oxfordshire, no longer exists, and despite me thinking it was still operating somewhere in the area, it is not.
?
The Meteor Burst radio networks are now considered to be legacy systems.
?
They hold three frequencies for use of Meteor Burst:
?
? ? 46.400MHz
? ? 46.950MHz
? ? 49.750MHz
?
A station at Stanmore, North of London, was the main master station from 1988 to 2014 and broadcast on 46.975 and 46.4, however this station was decommissioned in 2014.
?
There are only two Meteor Master Stations still remaining in the UK:
?
Bacton, Norfolk - Master station. This operates on 46.975 / 46.95 and has antennae which are orientated NE to cover the Southern North Sea. This is most likely the station which is being picked up in Europe. The antennae are vertical 3 element Yagis
?
I think this is the tower with the antennas as seen on Google Streetview.
?
?
Waltham on the Wolds, Leicestershire - This operates on 46.4 but is defunct. The transmitter is still operating, but there are no outstations currently reporting in. The antennae are orientated NW and SW and are vertically orientated 3 element Yagis.
?
I think this is the tower with two views of the separate antennas as seen on Google Streetview.
?
?
?
Basically the master station polls on 46.975 generally at 30mS or so, the outstations respond on 46.950 when they have something to say.
?
The master stations are transmitting at 500W whilst the outstations are only 100W.
?
I also checked the University of Wales website, and the 46.5MHz (46.4 & 46.95MHz) MST radar near Aberystwyth seems to have been switched off sometime in 2024.
?
?
I wonder what they intend to do with the antenna system ?
?
Regards,
?
Martin
|
Re: Magentometer today 12/8/2024
I will rebalance the magnetometer thabks for advice
Sent from
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Yes John, I didn’t say anything before, but Andrew’s trace doesn’t look right. It looks like the magnetometer balance is off and limiting on the positive side. The trace only moved when there was a big shift
negative, as seen by myself and others on the 12th. My traces are really noisy and have diurnal effects, mainly to do with temperature changes. I should have dug a big hole for the mag rather than let it cook in the sun.
?
David
?
?
?
??? ??? It does look odd that the rest of the trace is perfectly flat. There is usually some diurnal curve, with recent days being very turbulent. Yesterday was a little more quiet, but still disturbed.
John.
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Re: Magentometer today 12/8/2024
Yes John, I didn’t say anything before, but Andrew’s trace doesn’t look right. It looks like the magnetometer balance is off and limiting on the positive side. The trace only moved when there was a big shift negative, as seen by myself and others on the 12th. My traces are really noisy and have diurnal effects, mainly to do with temperature changes. I should have dug a big hole for the mag rather than let it cook in the sun. ? David ? ?
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From: [email protected] On Behalf Of John Cook
Sent: Wednesday, August 14, 2024 8:33 AM
To: [email protected]
Subject: Re: [baa-rag] Magentometer today 12/8/2024? ??? ??? It does look odd that the rest of the trace is perfectly flat. There is usually some diurnal curve, with recent days being very turbulent. Yesterday was a little more quiet, but still disturbed.
John.
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Re: Magentometer today 12/8/2024
??? ??? It does look odd that the rest
of the trace is perfectly flat. There is usually some diurnal
curve, with recent days being very turbulent. Yesterday was a
little more quiet, but still disturbed.
John.
On 13/08/2024 20:06, Andrew Thornett via groups.io wrote:
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I
have reposted graph with more easily read times – see
Andy
?
?
It is always worth checking
you can see today's and yesterday's data only. You need to
be quick to make a check. What time was the event so I can
check my data?
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Re: Meteor Echo of the day
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Re: Magentometer today 12/8/2024
I have reposted graph with more easily read times – see
Andy
?
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From: [email protected] <[email protected]>
On Behalf Of Andrew Thomas via groups.io
Sent: 13 August 2024 20:48
To: [email protected]
Subject: Re: [baa-rag] Magentometer today 12/8/2024
?
It is always worth checking you can see today's and yesterday's data only. You need to be quick to make a check. What time was the event so I can check my data?
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Magnetometer traces August 2024
I have put a number of my traces from August 2024 on this URL =
Please could you take a look and let me know what you think. Strangely the dip seems to occur roughly same time each day which suggests to me it is terrestrial rather than due to solar activity – but I don’t really understand
what I am looking at.
Andy
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Re: Magentometer today 12/8/2024
Here's my magnetometer plot of 12-08-24 - quite a disturbed day. Fairly?good correspondence with the Aurorawatch Sumburgh (Shetland) magnetometer.
Callum
It is always worth checking you can see today's and yesterday's data only. You need to be quick to make a check. What time was the event so I can check my data?
Andrew
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Re: Magentometer today 12/8/2024
It is always worth checking http://geomag.bgs.ac.uk/data_service/space_weather/current_conditions.html you can see today's and yesterday's data only. You need to be quick to make a check. What time was the event so I can check my data?
Andrew
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Re: Magentometer today 12/8/2024
Hello,
??? ??? I cannot read the time scale either, but the 12th did have
a very strong disturbance, particularly between 14:00 and 18:00UT.
The Mull magnetometer shows this very well. The Aurora reports
from last night also confirm this activity. I had a mild hint of
aurora around midnight, but local lighting here near Wolverhampton
makes things difficult.
John.
On 13/08/2024 12:42, David Farn via groups.io wrote:
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My unprocessed data shows that there has
been a lot going on since early on the 12th Aug. I
see an extra dip in the X axis starting at about 7am this
morning. I can’t really make out the times on your graph, so I
am not sure if there is much in the way of agreement between
the data. But it certainly looks like the CMEs have been
having a big effect on the mag data.
?
David
?
?
From: [email protected] On Behalf Of Andrew
Thornett via groups.io
Sent: Monday, August 12, 2024 11:15 PM
To: [email protected]
Subject: [baa-rag] Magentometer today 12/8/2024
?
My magnetometer shows
trace below – have other people seen this chance and does
anyone know what happened?
Andy
?
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Re: Magentometer today 12/8/2024
My unprocessed data shows that there has been a lot going on since early on the 12th Aug. I see an extra dip in the X axis starting at about 7am this morning. I can’t really make out the times on your graph, so I am not sure if there is much in the way of agreement between the data. But it certainly looks like the CMEs have been having a big effect on the mag data. ? David ? ?
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Show quoted text
From: [email protected] On Behalf Of Andrew Thornett via groups.io
Sent: Monday, August 12, 2024 11:15 PM
To: [email protected]
Subject: [baa-rag] Magentometer today 12/8/2024? My magnetometer shows trace below – have other people seen this chance and does anyone know what happened? Andy ? 
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Re: Magentometer today 12/8/2024
There are some CME disturbances reported on Space Weather today, could be that. I am just downloading my Mag data and will see if I have seen anything here in Coventry. ? It’s all happening at once, there are still plenty of Perseid meteor ping on the radio (Graves). ? David ?
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From: [email protected] On Behalf Of Andrew Thornett via groups.io
Sent: Monday, August 12, 2024 11:15 PM
To: [email protected]
Subject: [baa-rag] Magentometer today 12/8/2024? My magnetometer shows trace below – have other people seen this chance and does anyone know what happened? Andy ? 
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There are so many interesting echoes it's hard to choose the
best.? Why don't you have a go. Take a snapshot of the display at
IN this screenshot the "Test Stream" is from a receiver at the NW
Hampshire location beaming vertically up with the antenna "end on"
to the beacon.
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