2.5.0 spase://IUGONET/Instrument/NIPR/SouthPole/SPA/ASI Monochromatic all-sky imager 2012-05-29T12:00:00 All-sky imager (ASI) consists of a 180° field-of-view lens (f = 6 mm, F = 1.4), an automated filter changer, and a back-illuminated air-cooled CCD camera with a resolution of 512 × 512 pixels. Calibration of the absolute luminosities was carried out with a 1.9 m integrating sphere at National Institute of Polar Research in Japan. spase://IUGONET/Person/Yusuke.Ebihara TeamMember DataProducer spase://IUGONET/Person/Allan.Weatherwax PrincipalInvestigator spase://IUGONET/Person/Yuka.Sato MetadataContact Imager All-sky Imager Observation at South Pole Station spase://IUGONET/Observatory/NIPR/SouthPole/SPA