Accession Number:

ADA003391

Title:

Area and Space Integrated Light Deficit of Sunspot Images.

Descriptive Note:

Final rept. 1 Apr 73-30 Jun 74,

Corporate Author:

PHOTOMETRICS INC LEXINGTON MASS

Report Date:

1974-07-31

Pagination or Media Count:

52.0

Abstract:

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.

Subject Categories:

  • Astrophysics
  • Computer Programming and Software

Distribution Statement:

APPROVED FOR PUBLIC RELEASE