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Table 2 Filter characteristics, typical sensitivities, and exposure times of the all-sky imagers

From: Ground-based instruments of the PWING project to investigate dynamics of the inner magnetosphere at subauroral latitudes as a part of the ERG-ground coordinated observation network

Filter number Species Observation wavelength (nm) Filter bandwidth (nm) Typical sensitivity (count/r/s) Exposure time (s) Binning
Camera #7 (C7, Athabasca, calibration date: November 18, 2014, 512 × 512)
 1 OI 557.7 1.760 0.2000 5 2 × 2
 2 OI 630.0 1.650 0.3190 30 2 × 2
 3 OH 720–910 190.000 1 2 × 2
 4 Hb 486.1 1.320 0.1930 40 2 × 2
 5 bg 572.5 1.630 0.2140 15 2 × 2
 6 OI 844.6 1.200 0.1480 25 2 × 2
 7 Na 589.3 1.500 0.5430 15 2 × 2
Camera #14 (CE, Zhigansk, calibration date: May 18, 2015, 512 × 512)
 1 OI 557.7 1.636 0.2497 30 2 × 2
 2 OI 630.0 1.645 0.3970 40 2 × 2
 3 OH >720 1 2 × 2
 4 OI 865.0 9.837 0.1853 40 2 × 2
 5 bg 572.5 1.515 0.2935 30 2 × 2
Camera #16 (CG, Kapuskasing, calibration date: December 26, 2016, 1024 × 1024)
 1 OI 557.7 1.783 0.5185 15 2 × 2
 2 OI 630.0 1.644 0.5343 30 2 × 2
 3 OH >720 1 2 × 2
 4 Hb 486.1 1.346 0.3558 30 2 × 2
 5 bg 572.5 1.498 0.4542 30 2 × 2
Camera #17 (CH, Nain, calibration date: December 26, 2016, 1024 × 1024)
 1 OI 557.7 1.757 0.4923 15 2 × 2
 2 OI 630.0 1.677 0.5123 30 2 × 2
 3 OH >720 1 2 × 2
 4 Hb 486.1 1.373 0.3455 30 2 × 2
 5 bg 572.5 1.495 0.4567 30 2 × 2
Camera #18 (CI, Nyrola, calibration date: December 26, 2016, 1024 × 1024)
 1 OI 557.7 1.742 0.5715 15 2 × 2
 2 OI 630.0 1.632 0.6019 30 2 × 2
 3 OH >720 1 2 × 2
 4 Hb 486.1 1.375 0.4115 30 2 × 2
 5 bg 572.5 1.509 0.5472 30 2 × 2
Camera #19 (CJ, Gakona, calibration date: December 26, 2016, 1024 × 1024)
 1 OI 557.7 1.781 0.4966 15 2 × 2
 2 OI 630.0 1.685 0.5504 30 2 × 2
 3 OH >720 1 2 × 2
 4 Hb 486.1 1.364 0.3621 30 2 × 2
 5 bg 572.5 1.492 0.4586 30 2 × 2
Camera #20 (CK, Istok, calibration date: December 26, 2016, 1024 × 1024)
 1 OI 557.7 1.717 0.5190 15 2 × 2
 2 OI 630.0 1.627 0.6032 30 2 × 2
 3 OH >720 1 2 × 2
 4 Hb 486.1 1.344 0.4036 30 2 × 2
 5 bg 572.5 1.508 0.5242 30 2 × 2
Camera #21 (CL, Husafell, calibration date: December 26, 2016, 1024 × 1024)
 1 OI 557.7 1.769 0.4860 15 2 × 2
 2 OI 630.0 1.614 0.5493 30 2 × 2
 3 OH >720 1 2 × 2
 4 Hb 486.1 1.379 0.3778 30 2 × 2
 5 bg 572.5 1.512 0.5030 30 2 × 2