A digital analysis of sunspot areas

Details A digital analysis of sunspot areas A digital analysis of sunspot areas

Mar 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984soph...91...45c&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 91, March 1984, p. 45-50.

Physics

9

Computer Programs, Digital Data, Sunspots, Astronomical Photography, Digital Techniques, Regression Analysis, Solar Maximum Mission

Scientific paper

Full-disk white light images of the Sun have been digitized, calibrated, and examined to determine objective sunspot areas for the early part of the operation of the Solar Maximum Mission satellite. We find that published sunspot areas determined from synoptic programs compare favorably with our digital areas. The mean residual between published areas and our digital areas is approximately 80 millionths of a hemisphere. The largest residual found is 642 millionths on April 1980 for Hale No. 16752.

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