Fourht(Pos.) and Fifth(Neg.) Generation Copies of a Coronagraph Photographs

Description

This data set is a complete set of all frames photographed on all Skylab missions. Aproximately 36,000 frames of data were taken, or about 2000 ft of 35-mm black and white film. These frames are in chronological order. Each frame contains an image of the solar corona and the occulting disk with out-of-focus occulting disk pylon, intensity calibration pattern, four fiducial marks, and the diode matrix array. A diode matrix array (6 columns by 12 rows) is printed on the film for each exposed data frame. From the array, information about experiment operating mode, Polaroid wheel position, sun center pointing and instrument internal alignment, spacecraft roll, and time of day can be obtained. The copy supplied to NSSDC was made by contact printing the original flight film (Eastman Kodak 026-02) using Eastman Kodak SO-355 film with processing optimized for the 9-s clear (i.e., no polarizer in place) exposure. These data have a step wedge located in the center of the occulting disk. They are available as 35-mm negative or positive copies or as enlargements on film or paper. For paper enlargements, the step wedge is usually covered. For information on the main data base and this data set, contact Dr. Robert MacQueen, High Altitude Observatory, University Corporation for Atmospheric Research, NCAR, P.O. Box 3000, Boulder, CO 80307.