Magnetometer Project
- swisswalter
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Re: Magnetometer Project
Hi Mike
I'm so sad to read about the death rattle of the fridge
Some of the best insulation material is aerogel, it may be worthwhile to try it
I'm so sad to read about the death rattle of the fridge
Some of the best insulation material is aerogel, it may be worthwhile to try it
Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE
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- grimble_cornet
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Re: Magnetometer Project
Interesting idea Wah
.....and water would certainly 'damp-down' the thermal oscillations BUT I think I have enough problems at the moment without introducing 'water + electronics = BANG' into the equation
Thanks for the aerogel suggestion Walter.
It does look like a possible solution. The 5mm blanket is not too expensive and is available in small quantities via the internet.
At the moment the cool box is wrapped, rather inelegantly, in a duvet and the temperature does seem quite stable with no significant change as the ambient temperature rises and falls by 6-8 degrees.
However, the trace does still seem to be drifting upwards - the basic frequency from the Bat detector has climbed steadily by about 50Hz since the temperature stabilised last night. This upward drift changes the overall shape of the trace when compared to the Intermagnet data although the individual 'micro-magnetic-events' are still captured.
Stuart has stressed several times that it does take a significant amount of time for things to settle down so........ think I will just leave it for a couple of days and see what happens before I explore a slightly more 'elegant' thermal insulation solution
.....and water would certainly 'damp-down' the thermal oscillations BUT I think I have enough problems at the moment without introducing 'water + electronics = BANG' into the equation
Thanks for the aerogel suggestion Walter.
It does look like a possible solution. The 5mm blanket is not too expensive and is available in small quantities via the internet.
At the moment the cool box is wrapped, rather inelegantly, in a duvet and the temperature does seem quite stable with no significant change as the ambient temperature rises and falls by 6-8 degrees.
However, the trace does still seem to be drifting upwards - the basic frequency from the Bat detector has climbed steadily by about 50Hz since the temperature stabilised last night. This upward drift changes the overall shape of the trace when compared to the Intermagnet data although the individual 'micro-magnetic-events' are still captured.
Stuart has stressed several times that it does take a significant amount of time for things to settle down so........ think I will just leave it for a couple of days and see what happens before I explore a slightly more 'elegant' thermal insulation solution
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Mike Garbett
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Mike Garbett
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- swisswalter
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Re: Magnetometer Project
Yes Mike
you are on a state of the project where you have to take your time. No rapid changes anymore (maybe a beer more )
you are on a state of the project where you have to take your time. No rapid changes anymore (maybe a beer more )
Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE
from 7 am - 7 pm http://www.nanosys.ch
from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa
from 7 am - 7 pm http://www.nanosys.ch
from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa
- grimble_cornet
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Re: Magnetometer Project
Beer always helps - and now I can get it from the fridge without fear of disturbing the Bats
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Mike Garbett
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Re: Magnetometer Project
Well this is interesting.................
After transferring the Bat detector from 8 degrees C in the fridge to 27 degrees C in the heated cool box I expected it to take some time to settle down but this is getting silly
During the first few hours the output of the Bat detector increased from about 2700Hz to about 3300Hz before is started to flatten out. So far, so good - this is exactly what has happened before
However, the increase continued over the next 12 hours although at a slower rate. As the temperature was still changing a little too much for comfort, I wrapped the cool box in a duvet and found that the heat mat and pulse thermostat was able to maintain the temperature within less than half a degree. This now pretty much matches Stuart's set up so surely the trace will now settle down
Nope
After 60 hours of very well controlled temperatures - the frequency is still climbing at about 150Hz per day with no sign of it stopping or even slowing down
It is now at about 3760Hz - over 1000Hz higher than when it was in the fridge with nothing having changed other than the temperature of the Bat detector.
The good news is that it is picking up very small changes in the Earth's magnetic field and - if we ignore the relentless uphill climb - matches Intermagnet data very well. The latest 24 hour record looks like this: I'm a bit baffled now and not sure what to do next
I have cracked the temperature stability issue (albeit in a rather inelegant way via the duvet wrap) but can't work out why the frequency is still rising?
One part of me wants to just leave it and see just how high it will go...........
Another part wants to get in there and re-tune the Bat detector to bring the base frequency back down to 2800Hz or so and see if it will stabilise there.
Decisions, decisions....................
Good job that I enjoy a challenge
After transferring the Bat detector from 8 degrees C in the fridge to 27 degrees C in the heated cool box I expected it to take some time to settle down but this is getting silly
During the first few hours the output of the Bat detector increased from about 2700Hz to about 3300Hz before is started to flatten out. So far, so good - this is exactly what has happened before
However, the increase continued over the next 12 hours although at a slower rate. As the temperature was still changing a little too much for comfort, I wrapped the cool box in a duvet and found that the heat mat and pulse thermostat was able to maintain the temperature within less than half a degree. This now pretty much matches Stuart's set up so surely the trace will now settle down
Nope
After 60 hours of very well controlled temperatures - the frequency is still climbing at about 150Hz per day with no sign of it stopping or even slowing down
It is now at about 3760Hz - over 1000Hz higher than when it was in the fridge with nothing having changed other than the temperature of the Bat detector.
The good news is that it is picking up very small changes in the Earth's magnetic field and - if we ignore the relentless uphill climb - matches Intermagnet data very well. The latest 24 hour record looks like this: I'm a bit baffled now and not sure what to do next
I have cracked the temperature stability issue (albeit in a rather inelegant way via the duvet wrap) but can't work out why the frequency is still rising?
One part of me wants to just leave it and see just how high it will go...........
Another part wants to get in there and re-tune the Bat detector to bring the base frequency back down to 2800Hz or so and see if it will stabilise there.
Decisions, decisions....................
Good job that I enjoy a challenge
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Mike Garbett
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Mike Garbett
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- Carbon60
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Re: Magnetometer Project
Hi Mike,
I would just leave it to settle down. It will eventually peak. Don't forget that the thermometer will be reading slightly differently to the true temperature of the detector (i.e. it is not actually sitting inside the plastic housing and measuring the temperature of the circuit board). I agree that after 60hrs it should be stable, but let's see how far up the scale it goes. There's still a lot of headroom on the spectrum
Be aware that if it drifts too much then you will have to re-set the measurement frequency range selected for data acquisition.
Cheers
Stu
I would just leave it to settle down. It will eventually peak. Don't forget that the thermometer will be reading slightly differently to the true temperature of the detector (i.e. it is not actually sitting inside the plastic housing and measuring the temperature of the circuit board). I agree that after 60hrs it should be stable, but let's see how far up the scale it goes. There's still a lot of headroom on the spectrum
Be aware that if it drifts too much then you will have to re-set the measurement frequency range selected for data acquisition.
Cheers
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/
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/
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Re: Magnetometer Project
8 degrees to 27 degrees is quite a jump, especially when just 0.5 degree makes so much difference, it might take a while
Great data though
Alexandra
Great data though
Alexandra
- grimble_cornet
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Re: Magnetometer Project
Thanks folks, I think you are right and I will just see what happens
I agree Alexandra that the data is pretty impressive - better than I would have dared to expect from a 'hobby electronics project'
It is the need to re-set the frequency selection which makes me want to 'fiddle' but I'll let it settle first.
One question Stuart - the tone coming from the Bat detector seems very 'rough' with lots of quite harsh 'noise' rather than the fairly pure tone I would expect.
I could be wrong, but I think a lot of the 'noise' started when I moved over to a fairly simple 5v power supply (I think it powered a usb hub originally)?
Spectrum Lab seems to be coping with it and is able to identify the 'peak frequency' so, doesn't seem to be preventing me from picking up detailed data which matches Intermagnet data very well but I wondered if you got a 'cleaner' response by using the regulated supply shared with the FGM-3?
I agree Alexandra that the data is pretty impressive - better than I would have dared to expect from a 'hobby electronics project'
It is the need to re-set the frequency selection which makes me want to 'fiddle' but I'll let it settle first.
One question Stuart - the tone coming from the Bat detector seems very 'rough' with lots of quite harsh 'noise' rather than the fairly pure tone I would expect.
I could be wrong, but I think a lot of the 'noise' started when I moved over to a fairly simple 5v power supply (I think it powered a usb hub originally)?
Spectrum Lab seems to be coping with it and is able to identify the 'peak frequency' so, doesn't seem to be preventing me from picking up detailed data which matches Intermagnet data very well but I wondered if you got a 'cleaner' response by using the regulated supply shared with the FGM-3?
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Mike Garbett
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Mike Garbett
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Re: Magnetometer Project
Hi Mike,
It sounds like the issue is going to be the power supply. Probably best to use something stable and regulated to avoid noise.
Cheers.
Stu.
It sounds like the issue is going to be the power supply. Probably best to use something stable and regulated to avoid noise.
Cheers.
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/
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/
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Re: Magnetometer Project
Thought it was flattening out last night but no........ still rising slowly!
It did pick up a minor 'event' very well yesterday evening though so I'm not going to change anything for a while
The duvet seems to be working as the heat-mat plus pulse thermostat is now keeping the Bat detector stable to within about 0.3 degrees C
It did pick up a minor 'event' very well yesterday evening though so I'm not going to change anything for a while
The duvet seems to be working as the heat-mat plus pulse thermostat is now keeping the Bat detector stable to within about 0.3 degrees C
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Mike Garbett
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Mike Garbett
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Re: Magnetometer Project
Just thinking here, the circuit will naturally generate 'some' (small amount) heat by the nature it is turned on, if it is wrapped in the duvet all that heat will be trapped and the temperature will rise, gradually. maybe?
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- grimble_cornet
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Re: Magnetometer Project
Mmmmm. I had considered that but the box, inside the duvet, is thermostatically controlled with the heater running at 0-100% as required. Once the heating mat is switched off by the thermostat, the temperature in the box drops quite quickly before the heating is switched on again. The temperature probe is inside the foam shell surrounding the Bat detector so is measuring the temperature within about 2cm of the circuit board and remains stready to within 0.3 degrees.
Weird
5 days and counting...............
Weird
5 days and counting...............
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Mike Garbett
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Re: Magnetometer Project
Hi Mike,
How's the voltage? If the temperature is stable, then the other variable is voltage (both on the sensor and the magenta 5).
Mark's correct about internal heating from the bat detector, but as you say, this should have stabilised by now, which brings us back to voltage. There's no substitute for a good electrical supply!
Stu.
How's the voltage? If the temperature is stable, then the other variable is voltage (both on the sensor and the magenta 5).
Mark's correct about internal heating from the bat detector, but as you say, this should have stabilised by now, which brings us back to voltage. There's no substitute for a good electrical supply!
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/
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/
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Re: Magnetometer Project
That's an interesting point Stu
The sensor is powered from a 12v supply dropped to 5v and stabilised via the circuit you show in your project guide
The Bat 5 - as I said before - uses an old 5v hub power supply which I could replace by tapping another feed from the 12v supply - I have the components but didn't bother when the hub supply seemed to be working
I agree that the Bat 5 supply is the weakest link and it probably makes sense to upgrade BUT...... when the temperature was stable in the fridge, it was giving an almost perfect match to Intermagnet
Maybe things are different at 27 degrees?
Anyway, it seems to be almost flat now so I'll leave it for another 24 hours before considering a power supply upgrade, insulation tidy and Bat 5 re-tune.
The sensor is powered from a 12v supply dropped to 5v and stabilised via the circuit you show in your project guide
The Bat 5 - as I said before - uses an old 5v hub power supply which I could replace by tapping another feed from the 12v supply - I have the components but didn't bother when the hub supply seemed to be working
I agree that the Bat 5 supply is the weakest link and it probably makes sense to upgrade BUT...... when the temperature was stable in the fridge, it was giving an almost perfect match to Intermagnet
Maybe things are different at 27 degrees?
Anyway, it seems to be almost flat now so I'll leave it for another 24 hours before considering a power supply upgrade, insulation tidy and Bat 5 re-tune.
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Mike Garbett
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Mike Garbett
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- swisswalter
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Re: Magnetometer Project
Hi Mike
+/- 0.2 °C is very good. can you really do better ?
+/- 0.2 °C is very good. can you really do better ?
Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE
from 7 am - 7 pm http://www.nanosys.ch
from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa
from 7 am - 7 pm http://www.nanosys.ch
from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa
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Re: Magnetometer Project
Are you using a 'wall wart' style power supply?
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Re: Magnetometer Project
Hi Mike,
For reference, my data over the same period.
Stu.
For reference, my data over the same period.
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/
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/
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Re: Magnetometer Project
Hi Mike and Stuart
wonderful, you both are almost twins, to be identical twins however, there has to go more work into the Project
wonderful, you both are almost twins, to be identical twins however, there has to go more work into the Project
Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE
from 7 am - 7 pm http://www.nanosys.ch
from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa
from 7 am - 7 pm http://www.nanosys.ch
from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa
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Re: Magnetometer Project
Walter: no I don't think I can improve the temperature control. I would like to 'tidy up' the insulation by replacing the duvet with something more appropriate - maybe the aerogel you suggested?
Mark: yep, its a plug/transformer combo type. I know it's noisy and I can just tap into the supply to the sensor but I'm not convinced that it is the problem as I can get almost perfect data for hours at a time?
Stuart: thanks for the comparison: Looking at the last 12-24 hours, it seems that the difference between my data and that from Intermagnet is little more than the difference between individual magnetometers contributing to Intermagnet
I might strip it down and take the opportunity to re-tune the Bat 5 tomorrow
Mark: yep, its a plug/transformer combo type. I know it's noisy and I can just tap into the supply to the sensor but I'm not convinced that it is the problem as I can get almost perfect data for hours at a time?
Stuart: thanks for the comparison: Looking at the last 12-24 hours, it seems that the difference between my data and that from Intermagnet is little more than the difference between individual magnetometers contributing to Intermagnet
I might strip it down and take the opportunity to re-tune the Bat 5 tomorrow
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Mike Garbett
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Mike Garbett
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Re: Magnetometer Project
Hi Mike
great results, fantastic results. BTW, don't you have to correct for the location on earth ?
great results, fantastic results. BTW, don't you have to correct for the location on earth ?
Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE
from 7 am - 7 pm http://www.nanosys.ch
from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa
from 7 am - 7 pm http://www.nanosys.ch
from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa
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Re: Magnetometer Project
Perfectly correct Walter - I have been looking at a range of magnetometers in 'Mid-latitude Europe'.
Anyway - very happy with today's trace which finished with a nice 80 nT peak which matches very well the data from the Intermagnet site
Don't think I can ask for much more than that
Anyway - very happy with today's trace which finished with a nice 80 nT peak which matches very well the data from the Intermagnet site
Don't think I can ask for much more than that
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Mike Garbett
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Re: Magnetometer Project
Hi Mike
what a fine catch, great match, congratulations
what a fine catch, great match, congratulations
Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE
from 7 am - 7 pm http://www.nanosys.ch
from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa
from 7 am - 7 pm http://www.nanosys.ch
from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa
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Re: Magnetometer Project
Hi Mike,
I think we can conclude that 'SolarChat' magnetometers 1 and 2 are up and running well!
We just need a few more dotted around the globe to have a network
For anyone else on this forum, if you've read this far then you must have an interest in this sort of thing. As you can see, Mike has set up a fully functional magnetometer using little more than a FGM-3 sensor, an ultrasonic emitter, a bat detector and a lap-top. Key to this project is having a location that is free from magnetic disturbances, a good stable power supply (with some basic home electronics required) and excellent thermal management. There can be some challenges in all these things, but as Mike has shown, persistence wins and with some basic equipment suitable temperature stability can be achieved. I think the total cost is in the region of £250-£300, including sensor, detector and heater/thermostat.
I'd encourage anyone who can meet the 'free from magnetic disturbances' criteria to have a go. More details on how to construct this device can be found in the tutorial section.
Good luck.
Stu.
I think we can conclude that 'SolarChat' magnetometers 1 and 2 are up and running well!
We just need a few more dotted around the globe to have a network
For anyone else on this forum, if you've read this far then you must have an interest in this sort of thing. As you can see, Mike has set up a fully functional magnetometer using little more than a FGM-3 sensor, an ultrasonic emitter, a bat detector and a lap-top. Key to this project is having a location that is free from magnetic disturbances, a good stable power supply (with some basic home electronics required) and excellent thermal management. There can be some challenges in all these things, but as Mike has shown, persistence wins and with some basic equipment suitable temperature stability can be achieved. I think the total cost is in the region of £250-£300, including sensor, detector and heater/thermostat.
I'd encourage anyone who can meet the 'free from magnetic disturbances' criteria to have a go. More details on how to construct this device can be found in the tutorial section.
Good luck.
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/
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/
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Re: Magnetometer Project
How far do you need the magnetometer to be from buried electrical lines to achieve acceptable results?
Ralph
Ralph
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Re: Magnetometer Project
Hi Stuart
as soon as I have reached the status "retired" I'm after it
as soon as I have reached the status "retired" I'm after it
Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE
from 7 am - 7 pm http://www.nanosys.ch
from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa
from 7 am - 7 pm http://www.nanosys.ch
from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa
- grimble_cornet
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Re: Magnetometer Project
After a mere 8 days.............. the trace seems to have stabilised at about 4000Hz having started at about 3400Hz when the temperature was fully controlled:
Yesterday's trace was pretty good with no obvious sign of 'upwards creep'
Yesterday's trace was pretty good with no obvious sign of 'upwards creep'
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Mike Garbett
Selection of Solar and Deep Sky images on Flickr: https://www.flickr.com/photos/mikegarbett/
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Mike Garbett
Selection of Solar and Deep Sky images on Flickr: https://www.flickr.com/photos/mikegarbett/
- Carbon60
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Re: Magnetometer Project
Looking very good there, Mike.
Stu.
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/
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/
- Carbon60
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Re: Magnetometer Project
Hi Ralph,solarscope180 wrote:How far do you need the magnetometer to be from buried electrical lines to achieve acceptable results?
Ralph
It will depend on the current flowing through them as this will drive the local magnetic field. My magnetometer is about 5m from my house and it doesn't appear to be affected by normal domestic power systems. I wouldn't like to second guess your situation. I would just suggest that the further away the better.
Regards
Stuart
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/
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/
- grimble_cornet
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Re: Magnetometer Project
Mine is buried about 7m from the house but only about 2m from the power distribution box for my observatory. I have spent a couple of 3-4 hour sessions in the observatory drawing power for mount, computer and a 400W heater with no obvious deviation on the magnetometer trace.
However, as far away as possible makes sense!
However, as far away as possible makes sense!
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Mike Garbett
Selection of Solar and Deep Sky images on Flickr: https://www.flickr.com/photos/mikegarbett/
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Mike Garbett
Selection of Solar and Deep Sky images on Flickr: https://www.flickr.com/photos/mikegarbett/
- swisswalter
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Re: Magnetometer Project
Hi Mike
that really looks very good, congratulations
that really looks very good, congratulations
Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE
from 7 am - 7 pm http://www.nanosys.ch
from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa
from 7 am - 7 pm http://www.nanosys.ch
from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa
- marktownley
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Re: Magnetometer Project
Really looking the business now Mike!
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!
- grimble_cornet
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Re: Magnetometer Project
Thanks guys.
I'm glad I gave it time to settle down but still baffled why it took 8 days!
Fairly happy with the results at the moment as it seems to capture all the 'significant' events - just waiting for a BIG one now.......
I'm glad I gave it time to settle down but still baffled why it took 8 days!
Fairly happy with the results at the moment as it seems to capture all the 'significant' events - just waiting for a BIG one now.......
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Mike Garbett
Selection of Solar and Deep Sky images on Flickr: https://www.flickr.com/photos/mikegarbett/
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Mike Garbett
Selection of Solar and Deep Sky images on Flickr: https://www.flickr.com/photos/mikegarbett/
- grimble_cornet
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Re: Magnetometer Project
Latest update..................
Things seem to have stabilised nicely over the last few weeks and I am now getting data which compares rather well with published results.
The last couple of days have been quite active with swings of 60 to -60 nT
One interesting point - look at 10am on the 17th and you will see a (relatively) big dip in temperature caused by me leaving the patio doors open for about 20 minutes while I was setting up my imaging gear on the patio. Shows just how easy it is to de-stabilise the system (even in a thermostatically controlled box) and, even though it didn't seem to distort the magnetic data too much, a small drop in the output can be easily mapped to the 0.4 degree drop in temperature
Things seem to have stabilised nicely over the last few weeks and I am now getting data which compares rather well with published results.
The last couple of days have been quite active with swings of 60 to -60 nT
One interesting point - look at 10am on the 17th and you will see a (relatively) big dip in temperature caused by me leaving the patio doors open for about 20 minutes while I was setting up my imaging gear on the patio. Shows just how easy it is to de-stabilise the system (even in a thermostatically controlled box) and, even though it didn't seem to distort the magnetic data too much, a small drop in the output can be easily mapped to the 0.4 degree drop in temperature
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Mike Garbett
Selection of Solar and Deep Sky images on Flickr: https://www.flickr.com/photos/mikegarbett/
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Mike Garbett
Selection of Solar and Deep Sky images on Flickr: https://www.flickr.com/photos/mikegarbett/
- Montana
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- grimble_cornet
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Re: Magnetometer Project
That is correct Alexandra.
I must say that I'm very surprised how my £200 'lash-up' performs so well in comparison with professional stations which I assume have somewhat larger budgets
I must say that I'm very surprised how my £200 'lash-up' performs so well in comparison with professional stations which I assume have somewhat larger budgets
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Mike Garbett
Selection of Solar and Deep Sky images on Flickr: https://www.flickr.com/photos/mikegarbett/
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Mike Garbett
Selection of Solar and Deep Sky images on Flickr: https://www.flickr.com/photos/mikegarbett/
- swisswalter
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Re: Magnetometer Project
Hi Mike
a perfect match, incredibly sensitiv to small temperature changes
a perfect match, incredibly sensitiv to small temperature changes
Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE
from 7 am - 7 pm http://www.nanosys.ch
from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa
from 7 am - 7 pm http://www.nanosys.ch
from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa
- marktownley
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Re: Magnetometer Project
Excellent results! Very thermally dependable...
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!
- Carbon60
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Re: Magnetometer Project
Nice one, Mike.
I had some issues this week with a water leak in the garage and had to use a heater to help dry things out. Needless to say, the temperature change sent my data haywire for a period. Back to normal now....thankfully.
Stu.
I had some issues this week with a water leak in the garage and had to use a heater to help dry things out. Needless to say, the temperature change sent my data haywire for a period. Back to normal now....thankfully.
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/
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/
- marktownley
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Re: Magnetometer Project
The next step forward for this project is advanced elements of thermal stabilty...
Sounds like it should have been a textbook I read for my A-levels...
Sounds like it should have been a textbook I read for my A-levels...
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!