A neural network approach for identifying particle pitch angle distributions in Van Allen Probes data

TitleA neural network approach for identifying particle pitch angle distributions in Van Allen Probes data
Publication TypeJournal Article
Year of Publication2016
AuthorsSouza, VM, Vieira, LEA, Medeiros, C, Da Silva, LA, Alves, LR, Koga, D, Sibeck, DG, Walsh, BM, Kanekal, SG, Jauer, PR, Rockenbach, M, Dal Lago, A, Silveira, MVD, Marchezi, JP, Mendes, O, Gonzalez, WD, Baker, DN
JournalSpace Weather
Paginationn/a - n/a
Date Published04/2016
Keywordspitch angle distributions; self-organizing maps; Van Allen belt's monitoring; Van Allen Probes
AbstractAnalysis of particle pitch angle distributions (PADs) has been used as a means to comprehend a multitude of different physical mechanisms that lead to flux variations in the Van Allen belts and also to particle precipitation into the upper atmosphere. In this work we developed a neural network-based data clustering methodology that automatically identifies distinct PAD types in an unsupervised way using particle flux data. One can promptly identify and locate three well-known PAD types in both time and radial distance, namely, 90° peaked, butterfly, and flattop distributions. In order to illustrate the applicability of our methodology, we used relativistic electron flux data from the whole month of November 2014, acquired from the Relativistic Electron-Proton Telescope instrument on board the Van Allen Probes, but it is emphasized that our approach can also be used with multiplatform spacecraft data. Our PAD classification results are in reasonably good agreement with those obtained by standard statistical fitting algorithms. The proposed methodology has a potential use for Van Allen belt's monitoring.
URLhttp://doi.wiley.com/10.1002/2015SW001349http://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2F2015SW001349
DOI10.1002/2015SW001349
Short TitleSpace Weather


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