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uRADMonitor â€“ Online remote radiation monitoring station

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Proud Mary

Sat Dec 08 2012, 12:18AM

Registered Member #543 Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992

Patrick wrote ...

ive had good operation from the BMP085 device (in my drones), easy to program and use if its on a breakout board.

I'm not going to be monitoring barometric pressure here in Steyning, but may add a SID receiver in the future.

radhoo

Sat Dec 08 2012, 08:28AM

Registered Member #1938 Joined: Sun Jan 25 2009, 12:44PM
Location: Romania
Posts: 699

Proud Mary wrote ...

I'll see what I can do with getting the pulses online with PicoLog or Daqarta when I am not too busy - perhaps I will be able to find time over the Christmas holidays, if I am lucky.

Stella, if waiting a little time is ok, I will probably be able to build another board in february 2013 which I'd be happy to send it to you. You've helped me a lot with my projects, and its the least I can do to say thanks. Until then, here on the forum we can discuss any possible improvements to incorporate in the new build. I'll add a few scope traces the next few days, to use as a starting point.

radhoo

Sat Dec 08 2012, 10:40AM

Registered Member #1938 Joined: Sun Jan 25 2009, 12:44PM
Location: Romania
Posts: 699

First snow:

Proud Mary

Sat Dec 08 2012, 12:12PM

Registered Member #543 Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992

radhoo wrote ...

That is very kind, Radu! Thank you!

Proud Mary

Sat Dec 08 2012, 02:41PM

Registered Member #543 Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992

Here is a useful paper on the methods used by the UK government's Department of Energy and Climate Change to measure radioactivity in the air and rainwater. Some of the methods are beyond the resources of most amateurs, but there is still plenty of useful information in it:

MONITORING OF RADIOACTIVITY
IN AIR AND RAINWATER IN THE UK

radhoo

Thu Jan 31 2013, 07:33PM

Registered Member #1938 Joined: Sun Jan 25 2009, 12:44PM
Location: Romania
Posts: 699

First unusual event has been logged here:

The debug data shows normal device behavior, so it's unlikely to be any malfunction here.

I just wonder what might have happened during those 6 minutes???

Proud Mary

Thu Jan 31 2013, 08:17PM

Registered Member #543 Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992

radhoo wrote ...

First unusual event has been logged here:

The debug data shows normal device behavior, so it's unlikely to be any malfunction here.

I just wonder what might have happened during those 6 minutes???

If it is not an artifact of system or experimenter error, it certainly is very interesting. Why not see if there are any time correlations with online magnetic observatories in Eastern Europe, solar activity and VLF observatories? The Italian experimenters at Radio Waves Below 22 kHz

may have data to share with you too.

Proud Mary

Thu Jan 31 2013, 08:45PM

Registered Member #543 Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992

Another idea about your counting spike.

If your GM tube is high off the ground, and not contained in an EM shield with a low impedance Earth connection, it is possible that a passing electric storm overhead might have caused a high potential difference to develop. This might possibly push the tube to the upper end of the Geiger plateau, where the slope tilts sharply upwards on its way to the continuous conduction band.

radhoo

Thu Jan 31 2013, 08:46PM

Registered Member #1938 Joined: Sun Jan 25 2009, 12:44PM
Location: Romania
Posts: 699

First thing I did , was to compare the readings to those collected by a friend of mine, in Oradea, at aprox. 200km north from my location. His readings, didn't record any abnormal variations:

There is always a chance of something going wrong , but for that there are two questions:
1) why now, after 3 months of almost constant indications
2) how would such a malfunction manifest itself, since the voltage on tube remained close to 400V , and all the other parameters where in normal intervals. This spike lasted for 6 minutes, as shown in the debug data I posted, than everything went back to normal.
This is inconsistent with a technical issue scenario (like tube failure, avalanche discharges, etc).

LE: no storm involved. Today was a beautiful sunny day. The light intensity chart also jumped close to maximum:

radhoo

Thu Jan 31 2013, 08:55PM

Registered Member #1938 Joined: Sun Jan 25 2009, 12:44PM
Location: Romania
Posts: 699

Here's a comparison chart, between CPM values (cyan) and LUMINOSITY(red) for the last 14 days. Integration (value average) set to a 2hours interval:

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