2.2.2 spase://SMWG/Instrument/Ground/MaunaLoaSO/ACOS MLSO_ACOS 2015-10-23T00:00:00Z ACOS is the Advanced Coronal Observation System at Mauna Loa Solar Observatory. It is a suite of instruments designed to observe the solar atmosphere, including the Chromospheric Helium Imaging Photometer (CHIP, 1083.0nm), H-alpha prominence and solar disk monitor (PICS, 656.3nm), and the Mk4 K-coronameter, which observes the white light K-corona from 1.12-2.79 solar radii (700-950 nm). spase://SMWG/Person/Thomas.E.Holzer GeneralContact spase://SMWG/Instrument/MaunaLoaSO/ACOS Imager ACOS at MLSO spase://SMWG/Observatory/Ground/MaunaLoaSO