Physics
Scientific paper
Mar 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988soph..115..125v&link_type=abstract
Solar Physics (ISSN 0038-0938), vol. 115, no. 1, 1988, p. 125-131. USAF-supported research.
Physics
29
Magnetic Field Configurations, Magnetic Signatures, Solar Flares, Electric Current, H Alpha Line, Solar Prominences, Vertical Distribution
Scientific paper
The authors demonstrate a simple method of transforming vector magnetograms to heliographic coordinates. The merits of this transformation are illustrated using a vector magnetogram obtained with the MSFC vector magnetograph 80 minutes prior to a white light flare in active region AR 4474 on 25 April, 1984. The original magnetogram shows strong magnetic shear along the neutral line at both the flare site and a non-flaring site. The transformation of the magnetogram to heliographic coordinates shows that the elimination of projection effects results in a much shorter length of the sheared region at the non-flaring site than what is inferred from the image plane vector magnetogram. The length of the sheared region at the flare site is relatively less affected by the transformation.
Hagyard Mona J.
Hathaway David H.
Venkatakrishnan Parameshwaran
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