ACSIS, the Auto-Correlation Spectrometer and Imaging System, works together with HARP, the Heterodyne Array Receiver Programme, on the JCMT (link opens in a new window). It converts the data from HARP into digital images. The UK ATC wrote the data analysis software for ACSIS.
ACSIS was built at the Herzberg Institute of Astrophysics at the Dominion Radio Astrophyical Observatory in Penticton, Canada, with the UK ATC, the Dominion Astrophysical Observatory in Victoria, Canada and the National Radio Astronomy Observatory in Charlottesville, USA as collaborators.
ACSIS was delivered to the Hawaiian telescope in 2004.