Near InfraRed Aurora Camera
Near InfraRed Aurora Camera (NIRAC) of the National Institute of Polar Research Japan (NIPR). Front lens (L1), field lens (FL), collimator lens (L2) in front of interference filter (Andover), detector lens (L3) and NIR InGaAs imaging detector (FPA).

Scientific objectives
Near InfraRed Aurora Camera (NIRAC): The camera focuses on imaging dayside magnetosphere-ionosphere-atmosphere coupling processes in the high-latitude polar region with high sensitivity in the Short Wavelength Infrared Region (SWIR) of the electromagnetic spectrum. It is used as a twin instrument to the Near InfraRed Aurora and airglow Spectrograph-2 (NIRAS-2). Two-dimensional structures of aurora (N2+) and even weak airglow (OH) and their temporal evolutions can be visualized with a cadence of less than 30 seconds.

Owner: National Institute of Polar Research, Japan (NIPR)
PI: Takanori Nishiyama
Address: National Institute of Polar Research Japan
10-3, Midori-cho, Tachikawa-shi, Tokyo 190-8518

Instrument specifications
Exposure time: 15, 20 or 30 seconds
FOV: 92 x 73 degrees
Detector: Teledyne Princeton Instruments, NIR InGaAs
Interference filter: Andover (custom-made product)
Center wavelength: 1112.76 nm
FWHM: 13.8 nm

Target emissions
Aurora: N2+Meinel (0-0)
Airglow: OH (5-2)