Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-04-23
Astrophys.J.666:576-587,2007
Astronomy and Astrophysics
Astrophysics
In press for Astrophys. J. 2007
Scientific paper
10.1086/518994
Feature tracking and recognition are increasingly common tools for data analysis, but are typically implemented on an ad-hoc basis by individual research groups, limiting the usefulness of derived results when selection effects and algorithmic differences are not controlled. Specific results that are affected include the solar magnetic turnover time, the distributions of sizes, strengths, and lifetimes of magnetic features, and the physics of both small scale flux emergence and the small-scale dynamo. In this paper, we present the results of a detailed comparison between four tracking codes applied to a single set of data from SOHO/MDI, describe the interplay between desired tracking behavior and parameterization of tracking algorithms, and make recommendations for feature selection and tracking practice in future work.
DeForest Craig Edward
Hagenaar Hermance J.
Lamb D. A.
Parnell Clare E.
Welsch Brian Thomas
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