Area and Space Integrated Light Deficit of Sunspot Images.
Final rept. 1 Apr 73-30 Jun 74,
PHOTOMETRICS INC LEXINGTON MASS
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Microdensitometric film reduction, analysis and display techniques, and digital computer analysis and display were applied to solar surface radiance data. Photographs of sunspot activity were converted to isophote contour maps and ditital optical density arrays recorded on magnetic tape. Edge discrimination and background-correction procedures were developed to semi-automatically determine sunspot area and integrated light deficit from these digital data. Sample results of the methods developed are given.
- Computer Programming and Software