Journal
ASTROPHYSICAL JOURNAL
Volume 632, Issue 1, Pages L53-L56Publisher
IOP PUBLISHING LTD
DOI: 10.1086/497633
Keywords
magnetic fields; methods : data analysis; Sun : atmospheric motions
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Recently, local correlation tracking has been applied to magnetograms to estimate photospheric velocities. This Letter demonstrates that local correlation tracking is inconsistent with the magnetic induction equation, which governs the temporal evolution of the photospheric magnetograms. A modified formulation, consistent with the magnetic induction equation, is presented for accurately following photospheric magnetic footpoints.
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