The instrument was not automated so it operated in a campaign mode. Will be returning to Wisconsin. More information is available here. The image of the sky is superimposed on the interferometer ring pattern so that each ring corresponds to a different elevation angle on the sky. The detector is a back-thinned CCD, which has good quantum efficiency up to around 900 nm.
More information is available here.
A back-thinned CCD detector will enable the instrument to make measurements out to around 980 nm. These TEC measurements extend out to the altitudes of GPS satellites, approx. The lidar system will be used for Rayleigh measurements extending from 25 to 105 km. Also see the Millstone Hill Observatory Instrument Summary .