All-sky imaging polarimeter measurements of visible and NIR skylight at Mauna Loa, Hawaii

An all-sky imaging polarimeter was deployed in summer 2008 to the Mauna Loa Observatory in Hawaii to study atmospheric skylight polarization. This paper describes the Mauna Loa deployment and presents an initial comparison of our data to those observed by Coulson with a zenith-slice polarimeter in the late 1970s and early 1980s. We show how the all-sky imaging technique yields additional insight to the nature of skylight polarization beyond what is observed in a single zenith scan.