The Sky Camera pictures were taken with a Canon EOS 603, 35 mm camera equipped with a fish-eye 15 mm lens (Canon EF 15mm 1:2.8). The camera had a Canon Technical Back, which printed the date and time on each image. The film was Kodak Royal Gold 1000 ASA. The camera was mounted, looking up, in a weather-proof enclosure with the lens of the camera about 5mm from the glass of the enclosure. At approximately 0700 local time each day the camera and enclosure, with a new roll of film, was mounted on the top of the aerosol sampling van and the camera was programmed to take one image every 30 minutes. The film was developed in Seattle at the conclusion of ACE-1 and the images were transferred to 14 Photo-CD ROMs.
The .pcd format in the CD-ROMs contain images at a resolution of 3072 x 2048 pixels in 24 bit color. In order to bring the data to a reasonable size, image files in .jpg format at a resolution of 768 x 512 pixels were made which are available on this server.