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Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4059
Seems to be a good price, and for my purposes (ie frequency standard) should be more than adequate. I can run this for about a week on a moderately large Li-Ion in case the mains power goes off or power gets interrupted.
This is to periodically calibrate all my OCXO's on the GM sensors, for triangulation of terrestrial gamma ray flashes.
Registered Member #65
Joined: Thu Feb 09 2006, 06:43AM
Location:
Posts: 1155
Why not stack up a few high resolution global-shutter CMOS sensors in raw capture mode?
With a known distance between a shielded stacked-detector, any similar surface tracks in spacial proximity that form will give the entry angle via the offset distance between the centres of exposed areas for each planes' features. For example, a Pb shielded stack of 1 cm^2 sensor areas at 1080P with a planer distance of 0.5cm on a two sided sensor PCB socket array glued to a temperature regulated aluminium block. Syncing the actual detectors to a single shutter trigger and clock is relatively trivial, but aligning the pixel grids/normals for angle calculation is a bit trickier to calibrate.
Adding a 3rd planer sensor could likely auto-filter noisier sources even without flat field correction. Example, if calibrated plane 1 event feature A is (1,1) and plane 2 similar event feature is (2,2), then a plane 3 similar event feature should also occur at (3,3). Recall the Pb shielded array backing makes the device directional, sensor area exposed to pulsars is minimized if mounted vertically, and thus may estimate a particle source path if the current position is known.
Disclaimer, I don't think the minimal 16 image sensors with processors for 8 detector surfaces is battery friendly (or economical if a particle exposure event is sparse or enters at high oblique angles), but a similar set-up may be able to track multiple events at the same time as it only requires two probe locations (and 2 valid particle paths) to triangulate the source. Note that larger low resolution sensors may actually prove better if the host NTP syncs the shutter events within 1/1000s for the 1/60s exposures.
"Anyone want to help out?" Too busy to commit resources to someone else’s projects right now... and I don't understand how to triangulate non-concurrent events with existing GM detectors. I still may go looking for pulsars with web-cam sensors... if I get bored.
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