Table 1. Specification of BHO-FPI

Parameters Values
CCD Sensor Andor iKon M-934 BEX-DD (1,024 × 1,024)
Etalon Size 100 × 15 mm
Wind Error < 2–4 m/s
Temperature Error 9–12 K
Field of View 2.5°
Filter OI 557.7 nm, OI 630.0 nm, OH 892.0 nm
Exposure Time 180 sec
Sky Scan Cycle North-East-Zenith-West-South
Filter Bandwidth 0.8 nm FWHM
Filter Transmission 70%–80% for 630.0 nm filter
Laser HeNe laser (632.8 nm)
FPI System Dimensions 160 × 80 × 51 cm
Total System Weight (approx.) 110 kg
Power Requirements 110–240 V AC
BHO-FPI, Fabry-Perot interferometer installed at Bohyunsan Optical Astronomy Observatory; FPI, Fabry-Perot interferometer; CCD, charge-coupled device