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Table 2 List of bandpass filters produced by Andover Inc.

From: A new five-wavelength photometer operated in Tromsø (69.6°N, 19.2°E)

  Center wavelength (error) FWHM* (error) Numbers in Fig. 1b Targeted auroral emissions
Ch1 427.8 nm (+ 0.4/− 0 nm) 2.0 nm (± 0.5 nm) 14 N2+ 1NG:427.8 mm
Ch2 557.7 nm (+ 0.4/− 0 nm) 2.0 nm (± 0.5 nm) 15 OI(1S): 557.7 nm
Ch3 630.0 nm (+ 0.4/− 0 nm) 2.0 nm (± 0.5 nm) 16 OI(1D): 630.0 nm
Ch3 664.6 nm (± 2.0 nm) 13 nm (± 3.0 nm) 16 N2 1PG: 664.6 nm
Ch4 777.9 nm (+ 0.4/− 0 nm) 2.5 nm (± 0.5 nm) 17 OI(3p5P): 777.4 nm
Ch5 844.6 nm (+ 0.4/− 0 nm) 2.0 nm (± 0.5 nm) 18 OI(3p3P): 844.6 nm
  1. *FWHM: Full width at half maximum