Table 1. Advanced Mesospheric Temperature Mapper at King Sejong Station (KSS-AMTM) specifications

Parameter Value
Overall Field of view 120° circular view (~300 at 87 km altitude)
Pixel field of view 14 arcmin
Integration time 32 sec (10 sec per an image)
Operating temperature 23°C
Filters Background 1,522.05 nm (FWHM ~1.74 nm)
OH(3-1) P1(2) 1,523.96 nm (FWHM ~2.03 nm)
OH(3-1) P1(4) 1,543.30 nm (FWHM ~1.83 nm)
blocking filter For dark frame
Wideband glass Sky condition monitoring with 2-sec exposure
InGaAs FPA Number of pixels 640 × 512
Pixel size 20 μm
Quantum efficiency > 0.85 (@ 0.9 – 1.7 μm)
Operating temperature @ +20°C ambient –80°C
Readout rate 2 MHz
Dark current (e-/pixel/sec) 15.82 @ 2 MHzLooking at cold target at –174°C (+99°K), high gain output
Readout noise (e- rms) 68.3 @ 2 MHzMeasured at 1 μs exposure, high gain output
Conversion gain (e-/ADU) 1.2 @ 2 MHz, High gain output
FWHM, full width at half maximum; OH, hydroxyl; ADU, analog to digital unit; InGaAs, indium gallium arsenide; FPA, focal plane array.