| Texto completo | |
| Autor(es): Mostrar menos - |
Souza, V. M.
[1]
;
Vieira, L. E. A.
[1]
;
Medeiros, C.
[1]
;
Da Silva, L. A.
[1]
;
Alves, L. R.
[1]
;
Koga, D.
[1]
;
Sibeck, D. G.
[2]
;
Walsh, B. M.
[3, 4]
;
Kanekal, S. G.
[2]
;
Jauer, P. R.
[1]
;
Rockenbach, M.
[1]
;
Dal Lago, A.
[1]
;
Silveira, M. V. D.
[2]
;
Marchezi, J. P.
[1]
;
Mendes, O.
[1]
;
Gonzalez, W. D.
[1]
;
Baker, D. N.
[5]
Número total de Autores: 17
|
| Afiliação do(s) autor(es): | [1] Inst Nacl Pesquisas Espaciais, BR-12201 Sao Jose Dos Campos - Brazil
[2] NASA, Goddard Space Flight Ctr, Greenbelt, MD - USA
[3] Boston Univ, Ctr Space Phys, Boston, MA 02215 - USA
[4] Boston Univ, Dept Mech Engn, Boston, MA 02215 - USA
[5] Univ Colorado, Atmospher & Space Phys Lab, Campus Box 392, Boulder, CO 80309 - USA
Número total de Afiliações: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | SPACE WEATHER-THE INTERNATIONAL JOURNAL OF RESEARCH AND APPLICATIONS; v. 14, n. 4, p. 275-284, APR 2016. |
| Citações Web of Science: | 0 |
| Resumo | |
Analysis 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 degrees 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. (AU) | |
| Processo FAPESP: | 14/21229-9 - Análise numérico/observacional do aspecto macroscópico do processo de reconexão magnética na magnetopausa diurna terrestre |
| Beneficiário: | Vitor Moura Cardoso e Silva Souza |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |