|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.
The camera was in place on the roof of the Geophysical Institute building; the tower
structure can be seen in the picture's upper left quadrant. North is to the right,
and campus lighting shows on the outer rim of the circle. Numbers below the picture
show the time it was taken -- 2115, or 9:15 PM.
|This all-sky camera, which was developed at the Geophysical Institute of
the University of Alaska and used extensively during the IGY, used 16mmTri-x film and
took one picture every minute during hours of darkness.
|Volunteer observers played a part in many aspects of the IGY. Here, a
volunteer aurora observer enters his housetop observatory. Under the dome is an all-sky
camera capable of taking horizon-to-horizon photographs of aurorae during hours of darkness.
Not all volunteer aurora observers had such elaborate equipment; many simply recorded their
visual observations on mark-sense cards that were then sent to the coordinator for the visual
|Photograph of auroral display taken during the IGY.