Table 3.

Average ratios of measurements to reference after intercalibration. Moon lit nights are above 6 mcd/m².

Days with	Clear Nights (N = 2,383)	MEA < 0° (N = 7,952)	All Night (N = 13,788)	Moon lit nights only (N = 1,218)	Extrema (mcd/m2) (all nights)
					min	max
SQM1	0.999 ± 0.012	1.001 ± 0.032	0.99 ± 0.05	0.95 ± 0.05	0.65	16.63
SQM2	1.004 ± 0.014	1.002 ± 0.052	1.02 ± 0.06	1.02 ± 0.07	0.69	16.45
SQM3	0.996 ± 0.012	1.001 ± 0.033	0.96 ± 0.05	0.88 ± 0.05	0.65	15.27
SQM4	1.002 ± 0.009	1.000 ± 0.043	1.01 ± 0.06	1.03 ± 0.07	0.66	17.12
SQM5	1.001 ± 0.008	1.001 ± 0.019	1.01 ± 0.02	1.03 ± 0.02	0.67	17.66
SQM6	0.998 ± 0.009	1.001 ± 0.019	0.99 ± 0.03	0.98 ± 0.04	0.65	17.17
SQM7	1.000 ± 0.003	1.000 ± 0.015	1.02 ± 0.04	1.08 ± 0.05	0.66	17.57
SQM8	0.999 ± 0.007	1.001 ± 0.021	1.01 ± 0.04	1.07 ± 0.04	0.65	17.86
SQM9	1.001 ± 0.008	1.000 ± 0.019	0.99 ± 0.03	0.97 ± 0.04	0.65	15.70