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Plasmapause Equatorial Shape Determination via the Minimum L Algorithm: Description and EvaluationThe Minimum L Algorithm for determining the equatorial shape of the plasmapause using NASA IMAGE Extreme Ultraviolet (EUV) imagery is described and analyzed. The algorithm operates without human intervention given a single EUV image in which the plasmasphere silhouette boundary has been identified. For each line of sight (LOS) through pixels on the 13 plasmasphere silhouette boundary, the algorithm first finds all magnetic dipole 14 field lines intersected by the LOS and then returns as the plasmasphere s boundary the field line with the minimum L value. The analysis considers the reasonableness, applicability, and accuracy of the algorithm and contrasts it with 17 the well-known Edge Algorithm is also introduced. Application of all three algorithms to real EUV imagery is demonstrated.
Document ID
20070013991
Acquisition Source
Marshall Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Newman, Timothy S.
(Alabama Univ. Huntsville, AL, United States)
Wang, C.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Newman, T. S.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Gallagher, D. L.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
August 23, 2013
Publication Date
November 30, 2006
Subject Category
Geophysics
Distribution Limits
Public
Copyright
Other

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