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The FACT Sky Quality Meter (SQM) is located in the wiki:Skybox which also hosts the wiki:Positionmeter. It was installed in July 2014 by Hanspeter and Lubomir on the telescope. The first iteration had a problem: the window was not water tight. After a second iteration we could make the front window water tight. Then, after a week of testing in the rain Gareth, Adrian, and me decided to fly the box.
The Sky Quality Meter is a regular Unihedron SQM: http://unihedron.com/projects/sqm-le/
It is reachable in our internal ethernet via
10.0.100.208:10001
The commands it accepts can be seen in the Manual:
http://www.fact-project.org/logbook/uploads/manual/201407/SQM-LE_Users_manual.pdf
Further documents:
FoV curve:
http://www.fact-project.org/logbook/uploads/manual/201407/fovcurves.jpg