Off disk-center potential field calculations using vector magnetograms

Details Off disk-center potential field calculations using vector magnetograms Off disk-center potential field calculations using vector magnetograms

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989soph..120..235v&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 120, no. 2, 1989, p. 235-247. Research supported by USAF.

Physics

28

Photosphere, Solar Magnetic Field, Coordinate Transformations, Magnetic Signatures, Noise

Scientific paper

A potential field calculation for off disk-center vector magnetograms that uses all the three components of the measured field is investigated. There is neither any need for interpolation of grid points between the image plane and the heliographic plane nor for an extension or a truncation to a heliographic rectangle. Hence, the method provides the maximum information content from the photospheric field as well as the most consistent potential field independent of the viewing angle. The introduction of polarimetric noise produces a less tolerant extrapolation procedure than using the line-of-sight extrapolation, but the resultant standard deviation is still small enough for the practical utility of this method.

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