Field azimuth disambiguation using ambiguity-free currents |
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Authors: | A Skumanich M Semel |
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Institution: | (1) High Altitude Observatory, NCAR, 80302 Boulder, CO, U.S.A.;(2) Observatoire de Paris, URA 326 (CNRS), F 92195 Meudon, Cedex, France |
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Abstract: | Using the ambiguity-free vertical current defined by Semel and Skumanich (1995) we derive a minimum-current azimuth disambiguation for the observed magnetic field in the active region NOAA 7201. A comparison of such a minimum-current azimuth resolution with those from other extant methods indicates that the resulting resolution, even though found to be limited by noise, is a useful first approximation. A comparison of our minimum current distribution with the currents we derive from an extant disambiguation (Lites et al., 1995) indicates the presence of current discontinuities in the form of linear features near the magnetic neutral line of the associated -spot.The National Center for Atmospheric Research is funded by the National Science Foundation |
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Keywords: | magnetic azimuth resolution vertical currents -spots" target="_blank">gif" alt="delta" align="BASELINE" BORDER="0">-spots |
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