Table 1. Filter details, typical exposure times, and sensitivities for three all-sky nightglow imagers. The sensitivities are for (256,256) pixel (around the center of image). ---------------------------------------------------------------- emission wavelength bandwidth exposure sensitivity (nm) (nm) (sec) (count/R/s) ---------------------------------------------------------------- camera 1 OI 557.7 1.76 105 0.029 OI 630.0 1.90 165 0.038 OH* 720-910 190 15 - Na 589.3 1.83 105 0.032 background 572.5 1.75 105 0.031 camera 2 OI 557.7 1.85 105 0.044 OI 630.0 1.94 165 0.055 OH* 720-910 190 15 - O2(0,1) 865.0 10 105 - background 572.5 1.95 105 0.050 camera 3 OI 557.7 1.78 105 0.049 OI 630.0 1.82 165 0.053 OH* 720-910 190 15 - Hbeta 486.1 1.92 - 0.005 (465.1nm) background 572.5 1.77 105 0.050 ------------------------------------------------------------------ *with a notch at 865 nm to suppress the O2(0,1) emission