What can be said about its accuracy - both in terms of the systematic error or unit calibration and reproducibility or random error? I don't know how accurate SQM is in terms of actual units and across the range, but my SQM-L at least seems to be quite reproducible (within maybe 0.1 mag/sq arcsec) between measurements when pointed at the same spot in the dark (21 mag/sq arcsec) sky. What can be said also about its sensitivity or range of brightness that it measures?
We'll do Jimy. @Ivan. It's very accurate. We perform 3 measurements. Dark1 (base), Zenit and another Dark. If the results aren't within an expected range, the measurement has to be extended or done again. If the skies are very dark >21.5 more measurements are needed. Currently we are keeping a lot of statistics and the measurements are quite reproductive.
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