This photo-electric photometer, shown at Fritz Peak, Colorado in February 1958, was used in the US IGY Airglow program. In the space of approximately four minutes, the photometer scanned the sky in 5 different mucanter surveys, plus the zenith. Photograph of aurora taken by the all-sky camera.
North is to the right, and campus lighting shows on the outer rim of the circle.
Here, a volunteer aurora observer enters his housetop observatory.